[go: up one dir, main page]

CN112527039B - A Reconfigurable High Reliability Constant Current Drive System - Google Patents

A Reconfigurable High Reliability Constant Current Drive System Download PDF

Info

Publication number
CN112527039B
CN112527039B CN202011185091.2A CN202011185091A CN112527039B CN 112527039 B CN112527039 B CN 112527039B CN 202011185091 A CN202011185091 A CN 202011185091A CN 112527039 B CN112527039 B CN 112527039B
Authority
CN
China
Prior art keywords
constant current
power supply
backup
selection switch
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011185091.2A
Other languages
Chinese (zh)
Other versions
CN112527039A (en
Inventor
王农
方化潮
雷海军
王立伟
李荷丹
刘奇
胡海龙
仇振生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Institute of Control Engineering
Original Assignee
Beijing Institute of Control Engineering
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Institute of Control Engineering filed Critical Beijing Institute of Control Engineering
Priority to CN202011185091.2A priority Critical patent/CN112527039B/en
Publication of CN112527039A publication Critical patent/CN112527039A/en
Application granted granted Critical
Publication of CN112527039B publication Critical patent/CN112527039B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • G05F1/56—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
    • G05F1/561—Voltage to current converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

本发明提供一种可重构的高可靠恒流驱动系统，包括主备两份电源模块，主备两份恒流设置模块，主备两份恒流驱动模块，主备两份电源选择开关，主备两份恒流设置模块选择开关，信号电源选择开关，功率电源选择开关，恒流驱动模块选择开关和多个用于电源线或的二极管。通过不同的选择开关配置方式，所述恒流驱动系统可配置成八种不同的组合方式，保证系统任意模块发生故障时，仍可通过选择开关对剩余模块进行组合重构，保证系统正常工作，从而提高可靠性。

Figure 202011185091

The invention provides a reconfigurable high-reliability constant-current drive system, comprising two main and backup power supply modules, two main and backup constant current setting modules, two main and backup constant current driving modules, and two main and backup power supply selection switches, Two main and backup constant current setting module selection switches, signal power selection switches, power supply selection switches, constant current drive module selection switches and multiple diodes for power line ORing. Through different selection switch configuration methods, the constant current drive system can be configured into eight different combinations, ensuring that when any module of the system fails, the remaining modules can still be combined and reconstructed through the selection switch to ensure the normal operation of the system. Thereby improving reliability.

Figure 202011185091

Description

Reconfigurable high-reliability constant current driving system
Technical Field
The invention relates to a reconfigurable high-reliability constant current driving system, and belongs to the technical field of high-reliability constant current driving.
Background
In the prior art, most of constant current driving systems are composed of a power supply module, a constant current setting module and a constant current driving module, as shown in fig. 3. Since each module forming the constant current driving system is a single part, failure of the constant current driving system due to failure of any module in fig. 3 cannot be used in the special application fields of space such as spacecraft and the like. The reason is that in a space environment, the constant current driving system is not replaceable, and once the constant current driving system fails, the whole spacecraft task fails, so that billions of major economic losses are caused. In order to solve the problem, theoretically, the constant current driving system shown in fig. 3 can be used for multiple backups, and after one of the backups fails, the backup system can be started. This solution has two significant drawbacks: firstly, after the constant current driving system is used for multiple backups, the volume and the weight of the system are increased by times, which is unacceptable for spacecrafts with limited space resources; and secondly, the system cost is multiplied, on one hand, the cost is from the constant current driving system, and on the other hand, the indirect emission cost caused by the increase of the volume and the weight of the system is from.
Disclosure of Invention
The technical problems solved by the invention are as follows: in order to overcome the defects of the prior art, the invention provides a reconfigurable high-reliability constant current driving system, which ensures that the normal work of the system is not influenced when any module or a plurality of modules with different functions break down simultaneously, thereby improving the reliability of the conventional constant current driving system.
The technical scheme of the invention is as follows: a reconfigurable high-reliability constant current driving system comprises: a main power supply module (101), a main constant current setting module (102), a main constant current driving module (103), a backup power supply module (201), a backup constant current setting module (202), a backup constant current driving module (203), a main power selection switch (K1-A), a backup power selection switch (K1-B), a main constant current setting module selection switch (K2-A), a backup constant current setting module selection switch (K2-B), a signal power selection switch (K3), a power selection switch (K4), a constant current driving module selection switch (K5), a main positive signal power line or diode (D1-A), a backup positive signal power line or diode (D1-B), a main negative signal power line or diode (D2-A), a backup negative signal power line or diode (D2-B), a main auxiliary positive power supply line or diode (D3-A), a backup positive power supply line or diode (D3-B), a main auxiliary negative power supply line or diode (D4-A), and a backup negative power supply line or diode (D4-B);
the master power supply selection switch (K1-A) connects the input end (VA) of the master power supply module (101) with the master primary power supply (VIN-A) and is used for controlling the master power supply module (101) to be powered on or powered off; after the master power supply module (101) is powered on, voltage conversion is carried out on A master primary power supply (VIN-A), and A master bipolar signal power supply and A master bipolar power supply are output; the master bipolar signal power supply comprises a master positive signal power supply (+ V1A) and a master negative signal power supply (-V1A); the main part bipolar power supply comprises a main part positive power supply (+ V2A) and a main part negative power supply (-V2A);
the backup power supply selection switch (K1-B) connects the input end (VB) of the backup power supply module (201) with the backup primary power supply (VIN-B) and is used for controlling the backup power supply module (201) to be powered on or powered off; after the backup power supply module (201) is powered on, voltage conversion is carried out on a backup primary power supply (VIN-B), and a backup bipolar signal power supply and a backup bipolar power supply are output; the backup bipolar signal power supply comprises a backup positive signal power supply (+ V1B) and a backup negative signal power supply (-V1B); the backup bipolar power supply comprises a backup positive power supply (+ V2B) and a backup negative power supply (-V2B);
the main auxiliary positive signal power supply (+ V1A) and the backup positive signal power supply (+ V1B) are respectively sent to the anodes of a main auxiliary positive signal power supply line or diode (D1-A) and a backup positive signal power supply line or diode (D1-B), and the main auxiliary positive signal power supply line or diode (D1-A) and the cathode of the backup positive signal power supply line or diode (D1-B) are connected to be used as a positive signal power supply (+ V1-AB) and sent to the contact 1 of the first fixed end (K3) of the signal power supply selection switch (K3); the first normally closed end (the contact 2 of the K3) and the first normally open end (the contact 3 of the K3) of the signal power supply selection switch (K3) are respectively connected to the signal power supply positive end (+ V1-A) of the main constant-current drive module (103) and the signal power supply positive end (+ V1-B) of the backup constant-current drive module (203);
signal power supply selection switch (K3) comprising six contacts, respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end and the second normally open end;
the main negative signal power supply (-V1A) and the backup negative signal power supply (-V1B) are respectively sent to the cathodes of a main negative signal power supply line or diode (D2-A) and a backup negative signal power supply line or diode (D2-B), and the main negative signal power supply line or diode (D2-A) and the anode of a backup negative signal power supply line or diode (D2-B) are connected to be used as a negative signal power supply (-V1-AB) and sent to the second fixed end (contact 4 of K3) of the signal power supply selection switch (K3); and a second normally closed end (a contact 5 of the K3) and a second normally open end (a contact 6 of the K3) of the signal power supply selection switch (K3) are respectively connected to a signal power supply negative end (-V1-A) of the main constant current driving module (103) and a signal power supply negative end (-V1-B) of the backup constant current driving module (203).
The main auxiliary positive power supply (+ V2A) and the backup positive power supply (+ V2B) are respectively sent to a main auxiliary positive power supply line or diode (D3-A) and a backup positive power supply line or diode (D3-B) anode, and the main auxiliary positive power supply line or diode (D3-A) and the backup positive power supply line or diode (D3-B) cathode are connected to be used as a positive power supply (+ V2-AB) and sent to a first fixed end (contact 1 of K4) of a power supply selection switch (K4); the first normally-closed end (the contact 2 of the K4) and the first normally-open end (the contact 3 of the K4) of the power supply selection switch (K4) are respectively connected to the positive power supply terminal (+ V2-A) of the main constant-current drive module (103) and the positive power supply terminal (+ V2-B) of the backup constant-current drive module (203).
The main negative power supply (-V2A) and the backup negative power supply (-V2B) are respectively sent to a main negative power supply line or diode (D4-A) and a backup negative power supply line or cathode of a diode (D4-B), the main negative power supply line or diode (D4-A) and the backup negative power supply line or anode of a diode (D4-B) are connected to be used as a negative power supply (-V2-AB) and sent to a second fixed end (contact 4 of K4) of the power supply selection switch (K4); the second normally-closed end (contact 5 of K4) and the second normally-open end (contact 6 of K4) of the power supply selection switch (K4) are respectively connected to the power supply negative end (-V2-A) of the main constant-current drive module (103) and the power supply negative end (-V2-B) of the backup constant-current drive module (203);
the constant current output positive terminal (IL-A +) and the constant current output negative terminal (IL-A-) of the main constant current drive module (103) are respectively connected to the first normally-closed terminal (contact 2 of K5) and the second normally-closed terminal (contact 5 of K5) of the constant current drive module selection switch (K5);
the constant current output positive terminal (IL-B +) and the constant current output negative terminal (IL-B-) of the backup constant current driving module (203) are respectively connected to the first normally-open terminal (contact 3 of K5) and the second normally-open terminal (contact 6 of K5) of the constant current driving module selection switch (K5);
and a first fixed end (a contact 1 of K5) and a second fixed end (a contact 4 of K5) of the constant current driving module selection switch (K5) are respectively connected with two ends of a load (RL).
Preferably, the main power supply module (101) or the backup power supply module (201) can supply power to the main constant current driving module (103) or the backup constant current driving module (203) through the signal power supply selection switch (K3) and the power supply selection switch (K4).
Preferably, the signal power supply selection switch (K3) and the power supply selection switch (K4) are double-pole double-throw switches; signal power supply selection switch (K3) comprising six contacts, respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end and the second normally open end; power supply selection switch (K4) comprising six contacts, respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end, the second normally open end.
Preferably, the signal power supply selection switch (K3) and the power supply selection switch (K4) are operated simultaneously, and only one constant current driving module is powered by the main power supply module (101) or the backup power supply module (201) at the same time.
Preferably, the main constant current setting module (102) receives an externally input digital quantity control command, performs digital-to-analog conversion on the digital quantity control command, outputs a main positive current signal (IA +) and a main negative current signal (IA-), and respectively sends the main positive current signal (IA +) and the main negative current signal (IA-) to a first fixed end (contact 1 of K2-A) and a second fixed end (contact 4 of K2-A) of the main constant current setting module selection switch (K2-A);
the backup constant current setting module (202) receives a digital quantity control command input from the outside, outputs a backup positive current signal (IB +) and a backup negative current signal (IB-) after performing digital-to-analog conversion on the digital quantity control command, and is respectively connected to a contact 1 of a first fixed end (K2-B) and a contact 4 of a second fixed end (K2-B) of a selection switch (K2-B) of the backup constant current setting module;
the first normally closed end (the contact 2 of the K2-A) of the main share constant current setting module selection switch (K2-A) is connected with the first normally open end (the contact 3 of the K2-B) of the backup constant current setting module selection switch (K2-B), and then is connected with the constant current setting signal positive end (IAB-A +) of the main share constant current driving module (103);
the first normally open end (contact 3 of K2-A) of the main share constant current setting module selection switch (K2-A) is connected with the first normally closed end (contact 2 of K2-B) of the backup constant current setting module selection switch (K2-B), and then is connected with the constant current setting signal positive end (IAB-B +) of the backup constant current driving module (203);
the second normally closed end (contact 5 of K2-A) of the main share constant current setting module selection switch (K2-A) is connected with the second normally open end (contact 6 of K2-B) of the backup constant current setting module selection switch (K2-B), and then is connected with the constant current setting signal negative end (IAB-A-) of the main share constant current driving module (103);
the second normally open end (contact 6 of K2-A) of the main constant current setting module selection switch (K2-A) is connected with the second normally closed end (contact 5 of K2-B) of the backup constant current setting module selection switch (K2-B), and then is connected with the constant current setting signal negative end (IAB-B-) of the backup constant current driving module (203).
Preferably, the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) are double-pole double-throw switches; the master constant current setting module selection switch (K2-A) comprises six contacts which are respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end and the second normally open end; the backup constant current setting module selection switch (K2-B) comprises six contacts which are respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end, the second normally open end.
Preferably, the main constant current setting module selection switch (K2-a) and the backup constant current setting module selection switch (K2-B) operate simultaneously, and only one constant current setting module (the main constant current setting module (102) or the backup constant current setting module (202)) is connected with one constant current driving module (the main constant current driving module (103) or the backup constant current driving module (203)) at the same time;
preferably, the master constant current setting module and the backup constant current setting module are preferably implemented by digital-to-analog converters, and the digital-to-analog converters are preferably of a current output type.
Preferably, the constant current driving module selection switch (K5) is a double-pole double-throw switch; constant current drive module selection switch (K5), including six contacts, be respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end, the second normally open end.
Preferably, the constant current driving module selection switch (K5) operates simultaneously with the signal power supply selection switch (K3) and the power supply selection switch (K4).
Preferably, the constant current driving system has eight combination modes, and realizes constant current output to a load (RL).
Preferably, the master constant current driving module (103) includes: the circuit comprises a first current-voltage conversion resistor (R1A), a second current-voltage conversion resistor (R2A), a differential amplifier (A1-A), an error amplifier (A2-A), a sampling amplifier (A3-A), a power amplifier (A4-A) and a four-terminal sampling Resistor (RSA);
the non-inverting input end of the differential amplifier (A1-A) is used as an IAB-A + end of the main share constant current driving module (103), and is connected with a main share signal ground (GND1-A) through a first current-voltage conversion resistor (R1A) (GND1-A is the ground corresponding to + V1A and-V1A output by the main share power module (101));
the inverting input end of the differential amplifier (A1-A) is used as the IAB-A-end of the main share constant current driving module (103) and is connected with the main share signal ground (GND1-A) through a second current-voltage conversion resistor (R2A);
the differential amplifier (A1-A), the error amplifier (A2-A), the power supply positive terminal of the sampling amplifier (A3-A) is used as the + V1-A terminal of the main constant current driving module (103);
the differential amplifier (A1-A), the error amplifier (A2-A), the power supply negative terminal of the sampling amplifier (A3-A) is used as the-V1-A terminal of the master constant current driving module (103);
the output end of the differential amplifier (A1-A) is connected with the non-inverting input end of the error amplifier (A2-A), and the inverting input end of the error amplifier (A2-A) is connected with the output end of the sampling amplifier (A3-A);
the output end of the error amplifier (A2-A) is connected with the signal input end of the power amplifier (A4-A), and the signal output end of the power amplifier (A4-A) is used as the IL-A + end of the master constant current driving module (103);
the power supply positive end of the power amplifier (A4-A) is used as the + V2-A end of the main share constant current driving module (103); the power supply negative terminal of the power amplifier (A4-A) is used as the-V2-A terminal of the main constant current driving module (103);
the non-inverting input end of the sampling amplifier (A3-A) is connected with a first voltage end of a four-terminal sampling Resistor (RSA); the inverting input end of the sampling amplifier (A3-A) is connected with the second voltage end of the four-terminal sampling Resistor (RSA); a first current end of a four-end sampling Resistor (RSA) is used as an IL-A-end of the master constant current driving module (103), and a second current end of the four-end sampling Resistor (RSA) is connected with a master power ground (GND2-A) (GND2-A is the ground corresponding to + V2A and-V2A output by the master power module (101));
preferably, the backup constant current driving module (203) includes: the circuit comprises a first current-voltage conversion resistor (R1B), a second current-voltage conversion resistor (R2B), a differential amplifier (A1-B), an error amplifier (A2-B), a sampling amplifier (A3-B), a power amplifier (A4-B) and a four-terminal sampling Resistor (RSB);
the non-inverting input end of the differential amplifier (A1-B) is used as an IAB-B + end of the backup constant current driving module (203), and is connected with a backup signal ground (GND1-B) through a first current-voltage conversion resistor (R1B) (GND1-B is a ground corresponding to + V1B and-V1B output by the backup power module (201));
the inverting input end of the differential amplifier (A1-B) is used as the IAB-B-end of the backup constant current driving module (203), and is connected with the backup signal ground (GND1-B) through a second current-voltage conversion resistor (R2B);
the sampling circuit comprises a differential amplifier (A1-B), an error amplifier (A2-B), a power supply positive terminal of a sampling amplifier (A3-B) and a + V1-B terminal of a backup constant current driving module (203);
the sampling circuit comprises a differential amplifier (A1-B), an error amplifier (A2-B), a power supply negative terminal of a sampling amplifier (A3-B) and a-V1-B terminal of a backup constant current driving module (203);
the output end of the differential amplifier (A1-B) is connected with the non-inverting input end of the error amplifier (A2-B), and the inverting input end of the error amplifier (A2-B) is connected with the output end of the sampling amplifier (A3-B);
the output end of the error amplifier (A2-B) is connected with the signal input end of the power amplifier (A4-B), and the signal output end of the power amplifier (A4-B) is used as the IL-B + end of the backup constant current driving module (203);
the power supply positive terminal of the power amplifier (A4-B) is used as the + V2-B terminal of the backup constant current driving module (203); the power supply negative terminal of the power amplifier (A4-B) is used as the-V2-B terminal of the backup constant current driving module (203);
the non-inverting input end of the sampling amplifier (A3-B) is connected with the first voltage end of the four-terminal sampling Resistor (RSB); the inverting input end of the sampling amplifier (A3-B) is connected with the second voltage end of the four-terminal sampling Resistor (RSB); a first current end of the four-terminal sampling Resistor (RSA) is used as an IL-B-end of the backup constant-current driving module (203), and a second current end of the four-terminal sampling Resistor (RSA) is connected with a backup power ground (GND2-B) (GND2-B is a ground corresponding to + V2B and-V2B output by the backup power module (201));
preferably, the differential amplifier, the error amplifier and the sampling amplifier are powered by the bipolar signal power supply and return to the signal ground; the power amplifier is powered by a bipolar power supply and flows back to the power ground; the signal ground and the power ground are independent of each other and flow back to a signal ground terminal and a power ground terminal of the power supply module; the signal ground terminal and the power ground terminal of the power supply module are connected to a single point common ground.
Preferably, the main positive signal power line or diode (D1-A), the backup positive signal power line or diode (D1-B), the main negative signal power line or diode (D2-A), the backup negative signal power line or diode (D2-B) is a low-power Schottky diode, preferably, the forward conduction current is 1A to 2A, and the forward conduction voltage drop is 0.2V to 0.6V; the main part positive power supply wire or diode (D3-A), the backup positive power supply wire or diode (D3-B), the main part negative power supply wire or diode (D4-A), the backup negative power supply wire or diode (D4-B) are high-power Schottky diodes, the forward conduction current range is preferably 10A to 20A, and the forward conduction voltage drop is 0.2V to 0.6V.
Compared with the prior art, the invention has the advantages that:
(1) the high-reliability constant current driving system provided by the invention has eight combination modes, when any one module or a plurality of modules with different functions in the constant current driving system has a fault, the residual modules can still be combined and reconstructed, and the constant current is output to a load, so that the reliability of the constant current driving system is improved, and the special environment requirements of space tasks such as spacecrafts and the like are met.
(2) The invention can realize the constant current driving of the load in eight combination modes by carrying out the combination reconstruction of two groups of modules with the same main and standby functions through the selection switch. When any one module in the constant current driving system has a fault, the remaining modules can be combined to form four combinations; when two modules with different functions in the constant current driving system simultaneously fail, the remaining modules can be combined to form two combinations; when three modules with different functions in the constant current driving system have faults, the remaining modules can be combined to form the constant current driving system. Therefore, the invention is equivalent to the backup of three sets of the prior constant current driving system shown in the attached figure 3, but the volume and the weight are reduced by one third, the direct and indirect cost is reduced by half, and the advantages are obvious.
Drawings
FIG. 1 is a schematic block diagram of a highly reliable constant current driving system provided by the present invention;
fig. 2A is a schematic diagram of a master constant current driving module provided by the present invention;
fig. 2B is a schematic diagram of a backup constant current driving module provided by the present invention;
fig. 3 is a schematic block diagram of a conventional constant current driving system.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The invention provides a reconfigurable high-reliability constant current driving system which comprises a main power supply module and a standby power supply module, a main constant current setting module and a standby constant current driving module, a main power supply selection switch and a standby constant current setting module selection switch, a signal power supply selection switch, a power supply selection switch, a constant current driving module selection switch and a plurality of diodes for power supply lines or power supply lines. Through different configuration modes of the selector switches, the constant current driving system can be configured into eight different combination modes, so that when any module of the system breaks down, the remaining modules can be still combined and reconstructed through the selector switches, the normal work of the system is ensured, and the reliability is improved.
The active vibration isolation precision pointing control system of the new generation of 'ultra-precision, ultra-stable and ultra-agile' satellite platform (called 'three-super' platform for short) provides a new challenge for the reliability of a constant current driving system, and requires that any module forming the constant current driving system does not influence the normal work of the system when a fault occurs. In the prior art, most of constant current driving systems are composed of a power supply module, a constant current setting module and a constant current driving module, as shown in fig. 3. As each module forming the constant current driving system is a single part, the failure of the constant current driving system caused by the failure of any module in the figure does not meet the high reliability requirement of the 'three-super' platform on the constant current driving system. The constant current driving system of the 'three-super' platform is applied to a space environment and has non-replaceability, and once the constant current driving system fails, the task of the whole satellite platform fails, so that billions of major economic losses are caused. Theoretically, the constant current driving system shown in fig. 3 can be subjected to a plurality of redundant backups, and when one of the redundant backups fails, the backup operation can be started. But the volume, weight and cost of this solution will be multiplied, which is unacceptable for spacecraft with limited space resources and high cost.
The invention provides a reconfigurable high-reliability constant current driving system, which can realize eight combination modes by combining and reconfiguring two groups of modules with the same main and standby functions through a selection switch so as to drive a load in a constant current mode. When any one module or a plurality of modules with different functions in the system simultaneously break down, the rest modules can still be combined and reconstructed to realize constant current output to the load, thereby improving the reliability and reducing the volume, the weight and the cost.
As shown in fig. 1, a reconfigurable high-reliability constant current driving system includes: a main power supply module (101), a main constant current setting module (102), a main constant current driving module (103), a backup power supply module (201), a backup constant current setting module (202), a backup constant current driving module (203), a main power selection switch (K1-A), a backup power selection switch (K1-B), a main constant current setting module selection switch (K2-A), a backup constant current setting module selection switch (K2-B), a signal power selection switch (K3), a power selection switch (K4), a constant current driving module selection switch (K5), a main positive signal power line or diode (D1-A), a backup positive signal power line or diode (D1-B), a main negative signal power line or diode (D2-A), a backup negative signal power line or diode (D2-B), a main part positive power supply line or diode (D3-A), a backup positive power supply line or diode (D3-B), a main part negative power supply line or diode (D4-A), and a backup negative power supply line or diode (D4-B).
The master power supply selection switch (K1-A) connects the input end (VA) of the master power supply module (101) with the master primary power supply (VIN-A) and is used for controlling the master power supply module (101) to be powered on or powered off; after the master power supply module (101) is powered on, voltage conversion is carried out on A master primary power supply (VIN-A), and A master bipolar signal power supply and A master bipolar power supply are output; the master bipolar signal power supply comprises a master positive signal power supply (+ V1A) and a master negative signal power supply (-V1A); the main part bipolar power supply comprises a main part positive power supply (+ V2A) and a main part negative power supply (-V2A).
The backup power supply selection switch (K1-B) connects the input end (VB) of the backup power supply module (201) with the backup primary power supply (VIN-B) and is used for controlling the backup power supply module (201) to be powered on or powered off; after the backup power supply module (201) is powered on, voltage conversion is carried out on a backup primary power supply (VIN-B), and a backup bipolar signal power supply and a backup bipolar power supply are output; the backup bipolar signal power supply comprises a backup positive signal power supply (+ V1B) and a backup negative signal power supply (-V1B); the backup bipolar power supply comprises a backup positive power supply (+ V2B) and a backup negative power supply (-V2B).
The main auxiliary positive signal power supply (+ V1A) and the backup positive signal power supply (+ V1B) are respectively sent to the anodes of a main auxiliary positive signal power supply line or diode (D1-A) and a backup positive signal power supply line or diode (D1-B), and the main auxiliary positive signal power supply line or diode (D1-A) and the cathode of the backup positive signal power supply line or diode (D1-B) are connected to be used as a positive signal power supply (+ V1-AB) and sent to the contact 1 of the first fixed end (K3) of the signal power supply selection switch (K3); the first normally closed end (the contact 2 of the K3) and the first normally open end (the contact 3 of the K3) of the signal power supply selection switch (K3) are respectively connected to the signal power supply positive end (+ V1-A) of the main constant-current drive module (103) and the signal power supply positive end (+ V1-B) of the backup constant-current drive module (203).
The main negative signal power supply (-V1A) and the backup negative signal power supply (-V1B) are respectively sent to the cathodes of a main negative signal power supply line or diode (D2-A) and a backup negative signal power supply line or diode (D2-B), and the main negative signal power supply line or diode (D2-A) and the anode of a backup negative signal power supply line or diode (D2-B) are connected to be used as a negative signal power supply (-V1-AB) and sent to the second fixed end (contact 4 of K3) of the signal power supply selection switch (K3); and a second normally closed end (a contact 5 of the K3) and a second normally open end (a contact 6 of the K3) of the signal power supply selection switch (K3) are respectively connected to a signal power supply negative end (-V1-A) of the main constant current driving module (103) and a signal power supply negative end (-V1-B) of the backup constant current driving module (203).
The main auxiliary positive power supply (+ V2A) and the backup positive power supply (+ V2B) are respectively sent to a main auxiliary positive power supply line or diode (D3-A) and a backup positive power supply line or diode (D3-B) anode, and the main auxiliary positive power supply line or diode (D3-A) and the backup positive power supply line or diode (D3-B) cathode are connected to be used as a positive power supply (+ V2-AB) and sent to a first fixed end (contact 1 of K4) of a power supply selection switch (K4); the first normally-closed end (the contact 2 of the K4) and the first normally-open end (the contact 3 of the K4) of the power supply selection switch (K4) are respectively connected to the positive power supply terminal (+ V2-A) of the main constant-current drive module (103) and the positive power supply terminal (+ V2-B) of the backup constant-current drive module (203).
The main negative power supply (-V2A) and the backup negative power supply (-V2B) are respectively sent to a main negative power supply line or diode (D4-A) and a backup negative power supply line or cathode of a diode (D4-B), the main negative power supply line or diode (D4-A) and the backup negative power supply line or anode of a diode (D4-B) are connected to be used as a negative power supply (-V2-AB) and sent to a second fixed end (contact 4 of K4) of the power supply selection switch (K4); and the second normally closed end ((contact 5 of K4) and the second normally open end (contact 6 of K4)) of the power supply selection switch (K4) is respectively connected to the power supply negative end (-V2-A) of the main constant current drive module (103) and the power supply negative end (-V2-B) of the backup constant current drive module (203).
The positive signal power supply (+ V1-AB) and the negative signal power supply (-V1-AB) are used for providing a bipolar signal power supply for the main constant current driving module (103) or the backup constant current driving module (203) and supplying power to a precise circuit in the constant current driving module. The positive power supply (+ V2-AB) and the negative power supply (-V2-AB) are used for providing a bipolar power supply for the main constant current driving module (103) or the backup constant current driving module (203) and supplying power to a power circuit inside the constant current driving module. The invention adopts a mode that the power supply and the signal power supply are separately supplied, can effectively prevent the interference of the power circuit to the precise circuit and improve the reliability of the system.
The constant current output positive terminal (IL-A +) and the constant current output negative terminal (IL-A-) of the main constant current drive module (103) are respectively connected to the first normally-closed terminal (contact 2 of K5) and the second normally-closed terminal (contact 5 of K5) of the constant current drive module selection switch (K5); the constant current output positive terminal (IL-B +) and the constant current output negative terminal (IL-B-) of the backup constant current driving module (203) are respectively connected to the first normally-open terminal (contact 3 of K5) and the second normally-open terminal (contact 6 of K5) of the constant current driving module selection switch (K5); and a first fixed end (a contact 1 of K5) and a second fixed end (a contact 4 of K5) of the constant current driving module selection switch (K5) are respectively connected with two ends of a load (RL).
The main power supply module (101) or the backup power supply module (201) can supply power to the main constant current driving module (103) or the backup constant current driving module (203) through the signal power supply selection switch (K3) and the power supply selection switch (K4).
The signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current drive module selection switch (K5) are double-pole double-throw switches; signal power supply selection switch (K3) comprising six contacts, respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end and the second normally open end; the power supply selection switch (K4) comprises six contacts, which are respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end, the second normally open end. The constant current driving module selection switch (K5) comprises six contacts which are respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end, the second normally open end. When the switch is selected, the rated current of the contact is at least twice of the actual application current so as to improve the reliability. In the embodiment, the range of the current which can be borne by six contacts of the signal power supply selection switch (K3) is 1A to 2A; the six contacts of the power supply selection switch (K4) and the constant current driving module selection switch (K5) can bear the current range of 10A to 20A; the requirement that the rated current of the contact is at least twice of the actual application current is met.
The signal power supply selection switch (K3) and the power supply selection switch (K4) act simultaneously, and only one constant current driving module (a main constant current driving module (103) or a backup constant current driving module (203)) is supplied with power by the main power supply module (101) or the backup power supply module (201) at the same time. The power supply mode ensures that any one of the main constant current driving module (103) or the backup constant current driving module (203) can be supplied with power as long as any one of the main power module (101) or the backup power module (201) is powered on to work, so that the system reliability is improved.
The master constant current setting module (102) receives a digital quantity control command input from the outside, outputs a master positive current signal (IA +) and a master negative current signal (IA-) after performing digital-to-analog conversion on the digital quantity control command, and respectively sends the master positive current signal (IA +) and the master negative current signal (IA-) to a first fixed end (contact 1 of K2-A) and a second fixed end (contact 4 of K2-A) of the master constant current setting module selector switch (K2-A).
The backup constant current setting module (202) receives a digital quantity control command input from the outside, performs digital-to-analog conversion on the digital quantity control command, outputs a backup positive current signal (IB +) and a backup negative current signal (IB-), and is respectively connected to a first fixed end (contact 1 of K2-B) and a second fixed end (contact 4 of K2-B) of the backup constant current setting module selector switch (K2-B).
The first normally closed end (the contact 2 of the K2-A) of the main share constant current setting module selection switch (K2-A) is connected with the first normally open end (the contact 3 of the K2-B) of the backup constant current setting module selection switch (K2-B), and then the first normally open end is connected with the positive constant current setting signal end (IAB-A +) of the main share constant current driving module (103).
The first normally open end (contact 3 of K2-A) of the main constant current setting module selection switch (K2-A) is connected with the first normally closed end (contact 2 of K2-B) of the backup constant current setting module selection switch (K2-B), and then the first normally open end is connected with the constant current setting signal positive end (IAB-B +) of the backup constant current driving module (203).
The second normally closed end (contact 5 of K2-A) of the main constant current setting module selection switch (K2-A) is connected with the second normally open end (contact 6 of K2-B) of the backup constant current setting module selection switch (K2-B), and then is connected with the constant current setting signal negative end (IAB-A-) of the main constant current driving module (103).
The second normally open end (contact 6 of K2-A) of the main constant current setting module selection switch (K2-A) is connected with the second normally closed end (contact 5 of K2-B) of the backup constant current setting module selection switch (K2-B), and then the second normally closed end is connected with the constant current setting signal negative end (IAB-B-) of the backup constant current driving module (203).
The main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) are double-pole double-throw switches. The master constant current setting module selection switch (K2-A) comprises six contacts which are respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end and the second normally open end; the backup constant current setting module selection switch (K2-B) comprises six contacts which are respectively: the first fixed end, the second fixed end, the first normally closed end, the first normally open end, the second normally closed end, the second normally open end. When the switch is selected, the rated current of the contact is at least twice of the actual application current so as to improve the reliability. In this embodiment, the range of currents that can be borne by six contacts of the main constant current setting module selector switch (K2-a) and the backup constant current setting module selector switch (K2-B) is 1A to 2A, and both of the ranges meet the requirement that the rated current of the contacts should be at least twice of the actual application current.
The master constant-current setting module and the backup constant-current setting module are preferably realized by digital-to-analog converters, and the digital-to-analog converters are preferably of current output type so as to improve the anti-interference capability and improve the reliability of the system. In this embodiment, the master constant current setting module and the backup constant current setting module both use 16-bit current type digital-to-analog converters.
The main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously, and only one constant current setting module (the main constant current setting module (102) or the backup constant current setting module (202)) is connected with one constant current driving module (the main constant current driving module (103) or the backup constant current driving module (203)) at the same time.
The connection and working mode ensures that as long as any one of the master constant current setting module (102) or the backup constant current setting module (202) works normally, a constant current driving setting signal can be provided for the master constant current driving module (103) or the backup constant current driving module (203) by switching the master constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B), so that the reliability is improved.
The constant current driving module selection switch (K5) acts simultaneously with the signal power supply selection switch (K3) and the power supply selection switch (K4). The connection and working mode ensures that as long as any one of the main constant current driving module (103) and the backup constant current driving module (203) works normally, constant current driving can be provided for the load (RL) through the constant current driving module selection switch (K5), so that the reliability is improved.
As can be seen from the connection manner of the constant current driving system shown in fig. 1, through different configurations of the selection switches, the constituent modules of the constant current driving system shown in fig. 1 can be combined and duplicated to form eight different combination manners, so as to provide constant current output to the load. The eight combination modes are as follows:
combination mode 1:
the main power supply selection switch (K1-A) is closed, the backup power supply selection switch (K1-B) is opened, the main power supply module (101) is powered on to work, and the backup power supply module (201) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selection switches are respectively connected to the first normally closed end (contact 2) and the second normally closed end (contact 5); the master constant current setting module 102 is powered on to work, and the backup constant current setting module 202 is not powered on;
a signal power supply selection switch (K3), a power supply selection switch (K4) and a constant current drive module selection switch (K5) act simultaneously, and a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally closed end (contact 2) and a second normally closed end (contact 5); the main constant current driving module (103) is powered on to work, and the backup constant current driving module (203) is not powered on.
Combination mode 2:
the main power supply selection switch (K1-A) is closed, the backup power supply selection switch (K1-B) is opened, the main power supply module (101) is powered on to work, and the backup power supply module (201) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the first normally-open end (contact 3) and the second normally-open end (contact 6); the master constant current setting module (102) is powered on to work, and the backup constant current setting module (202) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally open end (contact 3) and a second normally open end (contact 6) of each selection switch, the backup constant current driving module (203) is electrified to work, and the main constant current driving module (103) is not electrified.
Combination mode 3:
the main power supply selection switch (K1-A) is closed, the backup power supply selection switch (K1-B) is opened, the main power supply module (101) is powered on to work, and the backup power supply module (201) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the first normally open end (contact 3) and the second normally open end (contact 6), the backup constant current setting module (202) is powered on to work, and the main constant current setting module (102) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally closed end (contact 2) and a second normally closed end (contact 5) of each selection switch, the master constant current driving module (103) is powered on to work, and the backup constant current driving module (203) is not powered on.
Combination mode 4:
the main power supply selection switch (K1-A) is closed, the backup power supply selection switch (K1-B) is opened, the main power supply module (101) is powered on to work, and the backup power supply module (201) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the respective first normally-closed end (contact 2) and the second normally-closed end (contact 5), the backup constant current setting module (202) is powered on to work, and the master constant current setting module (102) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally open end (contact 3) and a second normally open end (contact 6) of each selection switch, the backup constant current driving module (203) is electrified to work, and the main constant current driving module (103) is not electrified.
Combination 5:
the main power supply selection switch (K1-A) is switched off, the backup power supply selection switch (K1-B) is switched on, the backup power supply module (201) is powered on to work, and the main power supply module (101) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the respective first normally-closed end (contact 2) and the second normally-closed end (contact 5), the backup constant current setting module (202) is powered on to work, and the master constant current setting module (102) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally open end (contact 3) and a second normally open end (contact 6) of each selection switch, the backup constant current driving module (203) is electrified to work, and the main constant current driving module (103) is not electrified.
Combination mode 6:
the main power supply selection switch (K1-A) is switched off, the backup power supply selection switch (K1-B) is switched on, the backup power supply module (201) is powered on to work, and the main power supply module (101) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the first normally open end (contact 3) and the second normally open end (contact 6), the backup constant current setting module (202) is powered on to work, and the main constant current setting module (102) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally closed end (contact 2) and a second normally closed end (contact 5) of each selection switch, the master constant current driving module (103) is powered on to work, and the backup constant current driving module (203) is not powered on.
Combination 7:
the main power supply selection switch (K1-A) is switched off, the backup power supply selection switch (K1-B) is switched on, the backup power supply module (201) is powered on to work, and the main power supply module (101) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the first normally open end (contact 3) and the second normally open end (contact 6), the main constant current setting module (102) is powered on to work, and the backup constant current setting module (202) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally open end (contact 3) and a second normally open end (contact 6) of each selection switch, the backup constant current driving module (203) is electrified to work, and the main constant current driving module (103) is not electrified.
Combination mode 8:
the main power supply selection switch (K1-A) is switched off, the backup power supply selection switch (K1-B) is switched on, the backup power supply module (201) is powered on to work, and the main power supply module (101) is not powered on;
the main constant current setting module selection switch (K2-A) and the backup constant current setting module selection switch (K2-B) act simultaneously; the first fixed end (contact 1) and the second fixed end (contact 4) of the two selector switches are respectively connected to the respective first normally-closed end (contact 2) and the second normally-closed end (contact 5), the master constant current setting module (102) is powered on to work, and the backup constant current setting module (202) is not powered on;
the signal power supply selection switch (K3), the power supply selection switch (K4) and the constant current driving module selection switch (K5) act simultaneously, a first fixed end (contact 1) and a second fixed end (contact 4) of the three selection switches are respectively connected to a first normally closed end (contact 2) and a second normally closed end (contact 5) of each selection switch, the master constant current driving module (103) is powered on to work, and the backup constant current driving module (203) is not powered on.
According to the eight combination modes, when any module in the constant current driving system shown in fig. 1 fails, the constant current driving system still has four combination modes to work normally; when any three modules with different functions have faults, the remaining modules can still be combined and reconstructed through the selector switch, so that the normal work of the system is ensured, and the reliability is obviously enhanced. The following description will be given by way of three examples of faults.
The preferred scheme is as follows: assuming that the master power module (101) fails, the remaining modules can be combined to form four combination modes, which are: combination 5, combination 6, combination 7 and combination 8.
The preferred scheme is as follows: if the primary power supply module (101) and the backup constant current setting module (202) fail at the same time, the remaining modules can be combined to form two combination modes, which are respectively: combination 7 and combination 8.
The preferred scheme is as follows: if the master power supply module (101), the backup constant current setting module (202) and the backup constant current driving module (203) fail at the same time, the combination mode 8 can be reconstructed by combining the remaining modules.
Fig. 2A and 2B are detailed schematic diagrams of the master constant current driving module (103) and the backup constant current driving module (203) shown in fig. 1, respectively.
The preferred scheme is as follows: as shown in fig. 2A, the master constant current driving module (103) includes: the circuit comprises a first current-voltage conversion resistor (R1A), a second current-voltage conversion resistor (R2A), a differential amplifier (A1-A), an error amplifier (A2-A), a sampling amplifier (A3-A), a power amplifier (A4-A) and a four-terminal sampling Resistor (RSA).
The non-inverting input end of the differential amplifier (A1-A) is used as an IAB-A + end of the main share constant current driving module (103), and is connected with a main share signal ground (GND1-A) through a first current-voltage conversion resistor (R1A) (GND1-A is the ground corresponding to + V1A and-V1A output by the main share power module (101)).
And the inverting input end of the differential amplifier (A1-A) is used as the IAB-A-end of the main share constant current driving module (103) and is connected with the main share signal ground (GND1-A) through a second current-voltage conversion resistor (R2A).
The differential amplifier (A1-A), the error amplifier (A2-A) and the power supply positive terminal of the sampling amplifier (A3-A) are used as the + V1-A terminal of the main constant current driving module (103).
The differential amplifier (A1-A), the error amplifier (A2-A) and the power supply negative terminal of the sampling amplifier (A3-A) are used as the-V1-A terminal of the main constant current driving module (103).
The output end of the differential amplifier (A1-A) is connected with the non-inverting input end of the error amplifier (A2-A), and the inverting input end of the error amplifier (A2-A) is connected with the output end of the sampling amplifier (A3-A).
The output end of the error amplifier (A2-A) is connected with the signal input end of the power amplifier (A4-A), and the signal output end of the power amplifier (A4-A) is used as the IL-A + end of the main constant current driving module (103).
The power supply positive end of the power amplifier (A4-A) is used as the + V2-A end of the main constant current driving module (103); the power supply negative terminal of the power amplifier (A4-A) is used as the-V2-A terminal of the main constant current driving module (103).
The non-inverting input end of the sampling amplifier (A3-A) is connected with a first voltage end of a four-terminal sampling Resistor (RSA); the inverting input end of the sampling amplifier (A3-A) is connected with the second voltage end of the four-terminal sampling Resistor (RSA); the first current end of the four-end sampling Resistor (RSA) is used as an IL-A-end of the master constant current driving module (103), and the second current end of the four-end sampling Resistor (RSA) is connected with a master power ground (GND2-A) (GND2-A is the ground corresponding to + V2A and-V2A output by the master power module (101)).
The preferred scheme is as follows: as shown in fig. 2B, the backup constant current driving module (203) includes: the circuit comprises a first current-voltage conversion resistor (R1B), a second current-voltage conversion resistor (R2B), a differential amplifier (A1-B), an error amplifier (A2-B), a sampling amplifier (A3-B), a power amplifier (A4-B) and a four-terminal sampling Resistor (RSA).
The non-inverting input end of the differential amplifier (A1-B) is used as an IAB-B + end of the backup constant current driving module (203), and is connected with a backup signal ground (GND1-B) through a first current-voltage conversion resistor (R1B) (GND1-B is the ground corresponding to + V1B and-V1B output by the backup power module (201)).
The inverting input end of the differential amplifier (A1-B) is used as the IAB-B-end of the backup constant current driving module (203), and is connected with the backup signal ground (GND1-B) through a second current-voltage conversion resistor (R2B).
The differential amplifier (A1-B), the error amplifier (A2-B) and the power supply positive terminal of the sampling amplifier (A3-B) are used as the + V1-B terminal of the backup constant current driving module (203).
The differential amplifier (A1-B), the error amplifier (A2-B), and the power supply negative terminal of the sampling amplifier (A3-B) are used as the-V1-B terminal of the backup constant current driving module (203).
The output end of the differential amplifier (A1-B) is connected with the non-inverting input end of the error amplifier (A2-B), and the inverting input end of the error amplifier (A2-B) is connected with the output end of the sampling amplifier (A3-B).
The output end of the error amplifier (A2-B) is connected with the signal input end of the power amplifier (A4-B), and the signal output end of the power amplifier (A4-B) is used as the IL-B + end of the backup constant current driving module (203).
The power supply positive end of the power amplifier (A4-B) is used as the + V2-B end of the backup constant current driving module (203); the power supply negative terminal of the power amplifier (A4-B) is used as the-V2-B terminal of the backup constant current driving module (203).
The non-inverting input end of the sampling amplifier (A3-B) is connected with a first voltage end of a four-terminal sampling Resistor (RSB); the inverting input end of the sampling amplifier (A3-B) is connected with the second voltage end of the four-terminal sampling Resistor (RSB); the first current end of the four-terminal sampling Resistor (RSA) is used as an IL-B-end of the backup constant-current driving module (203), and the second current end of the four-terminal sampling Resistor (RSA) is connected with a backup power ground (GND2-B) (GND2-B is a ground corresponding to + V2B and-V2B output by the backup power module (201)).
The working principle of the master constant current driving module (103) and the backup constant current driving module (203) is the same, and the following description is given by taking fig. 2A as an example and combining fig. 1.
The preferred scheme is as follows: in fig. 2A, a first current-voltage converting resistor (R1A) and a second current-voltage converting resistor (R2A) of a master constant current driving module (103) convert a positive current signal (IAB-a +) and a negative current signal (IAB-a-) output by a master constant current setting module (101) or a backup constant current setting module (201) into voltage signals, and then amplify the voltage signals by a differential amplifier (a1-a) to improve the signal-to-noise ratio. The output voltage signal of the differential amplifier (A1-A) is used as a constant current setting signal for setting the output current magnitude of constant current drive; the error amplifier (A2-A) and the power amplifier (A4-A) form a series composite amplifier, which ensures the error correction precision and provides larger output voltage and output current; the output end of the power amplifier (A4-A) is connected with the first current end of the four-end sampling Resistor (RSA) after passing through the load (RL); the second current end of the four-terminal sampling Resistor (RSA) is connected to the main power ground (GND 2-A); a first voltage end and a second voltage end of a four-terminal sampling Resistor (RSA) are respectively connected to a non-inverting input end and an inverting input end of a sampling amplifier (A3-A); the output end of the sampling amplifier (A3-A) is connected with the inverting end of the error amplifier (A1-A), thereby forming a current series negative feedback constant current circuit.
The preferred scheme is as follows: setting a positive current signal input to a positive terminal (IAB-A +) of a constant current setting signal equal to IP, a negative current signal input to a negative terminal (IAB-A-) of the constant current setting signal equal to IN, and (IP + IN) ═ IC (2^ N/(2^ N +1)) and (IP-IN) ═ IC ((2^ N-2 ^ DB)/(2^ N +1)), wherein IC is a current constant of the main constant current setting module (102) and the backup constant current setting module (202), N is resolution, and DB is a digital quantity; the resistance values of the first current-voltage conversion resistor (R1A) and the second current-voltage conversion resistor (R2A) are equal and satisfy that R1A is equal to R2A is equal to RA, the resistance value of the four-terminal sampling Resistor (RSA) is RSA, the closed-loop gain of the differential amplifier (A1-A) is G1, the open-loop gain of the error amplifier (A2-A) is G2, the closed-loop gain of the power amplifier (A4-A) is G4, the closed-loop gain of the sampling amplifier A3-A is G3, the voltage amplitudes of the positive signal power supply (+ V1-A) and the negative signal power supply (-V1-A) are equal to V1A, and the voltage amplitudes of the positive power supply (+ V2-A) and the negative power supply (-V2-A) are equal to V2A. If the parameters satisfy the constraint relationship: g2> > G3, G2> G3> > G4, V1A > G4> V2A, the main constant current driving module (103) outputs constant driving current, and the constant driving current is equal to (IP-IN) G1 RA/(G3 RSA).
The further preferable scheme is as follows: the constraint conditions for improving the stability and reliability of the constant current driving system are as follows: IC is more than or equal to 10mA and less than or equal to 30mA, N is more than or equal to 16, RA is more than or equal to 20 omega and less than or equal to 30 omega, RSA is more than or equal to 0.1 omega and less than or equal to 0.3 omega, G1 is more than or equal to 5 and less than or equal to 20, G2 is more than or equal to 120dB, G4 is more than or equal to 2 and less than or equal to 10, and G3 is more than or equal to 5 and less than or equal to 20. In this embodiment, IC is 20mA, N is 16, RA is 25 Ω, RSA is 0.2 Ω, G1 is 10, G1 is 140dB or more, G2 is 3, and G3 is 10. When DB is more than or equal to 0 and less than or equal to 2^16, the power of-19.9997 mA is more than or equal to (IP-IN) and less than or equal to 19.9997mA, and the range of the constant current output (IL) corresponding to the load (RL) is more than or equal to-2.49996A and less than or equal to IL and less than or equal to 2.49996A.
Preferably, the preferable constraint conditions for further improving the stability and reliability of the constant current driving system are as follows: the temperature coefficients of (IP-IN), RA, RSA, G1, and G3 were all better than 10 ppm/deg.C, under which conditions the stability of the constant drive current (IL) flowing through the load (RL) was found to be better than 10 ppm/deg.C.
Preferably, measures for further improving the stability and reliability of the constant current driving system are as follows: the power supply signal connection mode and the ground signal return path of the master constant current driving module (103) and the backup constant current driving module (203) are optimized, and the following description is specifically provided with reference to fig. 1, fig. 2A and fig. 2B.
In FIG. 2A, the differential amplifier (A1-A), the error amplifier (A2-A) and the sampling amplifier (A3-A) of the main part constant current driving module (103) are powered by the main part bipolar signal power supply (+ V1-A and-V1-A) and flow back to the main part signal ground (GND 1-A); the power amplifier (A4-A) is powered by a main part bipolar power supply (+ V2-A and-V2-A) and flows back to a main part power ground (GND 2-A); the main share signal ground (GND1-A) and the main share power ground (GND2-A) independently return to the main share signal ground (A1) point and the main share power ground (A2) point of the main share power module (101) of FIG. 1.
In fig. 2B, the differential amplifier (a1-B), the error amplifier (a2-B) and the sampling amplifier (A3-B) of the backup constant current driving module (203) are powered by the backup bipolar signal power supplies (+ V1-B and-V1-B) and flow back to the backup signal ground (GND 1-B); the power amplifier (A4-B) is powered by a backup bipolar power supply (+ V2-B and-V2-B) and flows back to a backup power ground (GND 2-B); the backup signal ground (GND1-B) and the backup power ground (GND2-B) independently return to the backup signal ground (B1) point and the backup power ground (B2) point of the backup power module (201) shown in FIG. 1.
Finally, the signal ground terminal (A1) point and the power terminal (A2) point of the main power supply module (101) are connected with the signal ground terminal (B1) point and the power terminal (B2) point of the backup power supply module (201), and finally, single-point common grounding is achieved, so that the interference of the power signals on the precision amplification and sampling signals is effectively reduced, and the stability of output current and the reliability of a system are improved.
Finally, a series-parallel reliability prediction model is established for the embodiment provided by the invention, and reliability prediction is carried out by adopting a component stress analysis prediction method, and the result shows that: the reconfigurable high-reliability constant-current driving system provided by the invention has the reliability of more than 0.9995 (the confidence coefficient is 0.7) after 15 years of on-orbit flight, and meets the high-reliability requirement of aerospace type tasks.
In addition, the invention also provides a design mode of the reconfigurable high-reliability constant current driving system, which specifically comprises the following steps:
(1) dividing a single constant current driving system into a power supply module, a constant current setting module and a constant current driving module;
(2) determining a topological structure of the constant current driving module, and determining output modes of the power supply module and the constant current setting module according to the topological structure;
(3) the power supply module is designed into a main power supply module and a backup power supply module which have the same composition structure and working principle; the constant current setting module is designed into a master constant current setting module and a backup constant current setting module which have the same composition structure and working principle; the constant current driving module is designed into a main constant current driving module and a backup constant current driving module which have the same composition structure and working principle;
(4) determining a master power selection switch and a backup power selection switch according to the master power module and the backup power module, wherein the master power selection switch and the backup power selection switch are respectively used for controlling the power-on and power-off of the master power module and the backup power module;
(5) the power supply signals of the same type output by the main part and the backup power supply module are output through a diode phase or output, so that the power supply of any one of the main part and the backup power supply module is ensured to be powered on, and the power can be supplied to any one of the main part and the backup constant current driving module;
(6) determining a power supply selection switch according to the power supply mode of the constant current driving module, and connecting the power supply selection switch with the phase or end of the diode in the step (5) and the power supply ends of the master constant current driving module and the backup constant current driving module to ensure that only one constant current driving module is supplied with power by the master power module or the backup power module at the same time;
(7) determining a master constant-current setting module selection switch and a backup constant-current setting module selection switch according to the types of output signals of the master constant-current setting module and the backup constant-current setting module, connecting the master constant-current setting module selection switch and the backup constant-current setting module and the master constant-current driving module and the backup constant-current driving module, and designing the master constant-current setting module selection switch and the backup constant-current setting module selection switch to act simultaneously to ensure that only one constant-current setting module is connected with the constant-current driving module at the same time;
(8) and determining a constant current driving module selection switch according to the constant current output signals of the master constant current driving module and the backup constant current driving module, respectively connecting the constant current driving module selection switch with the master constant current driving module, the backup constant current driving module and the load, and designing the constant current driving module selection switch to simultaneously act with the power supply selection switch, so as to ensure that only one constant current driving module is connected with the load at the same time.
The high-reliability constant current driving system and the design method provided by the invention can be used for a high-reliability precise control system in the aerospace field and can also be used in any application occasion requiring high-reliability precise constant current driving in other fields, thereby having wide market and application prospect.
The high-reliability constant current driving system provided by the invention has eight combination modes, when any one module or a plurality of modules with different functions in the constant current driving system has a fault, the residual modules can still be combined and reconstructed, and the constant current is output to a load, so that the reliability of the constant current driving system is improved, and the special environment requirements of space tasks such as spacecrafts and the like are met.
The invention can realize the constant current driving of the load in eight combination modes by carrying out the combination reconstruction of two groups of modules with the same main and standby functions through the selection switch. When any one module in the constant current driving system has a fault, the remaining modules can be combined to form four combinations; when two modules with different functions in the constant current driving system simultaneously fail, the remaining modules can be combined to form two combinations; when three modules with different functions in the constant current driving system have faults, the remaining modules can be combined to form the constant current driving system. Therefore, the invention is equivalent to the backup of three sets of the prior constant current driving system shown in the attached figure 3, but the volume and the weight are reduced by one third, the direct and indirect cost is reduced by half, and the advantages are obvious.

Claims (9)

1.一种可重构的高可靠恒流驱动系统，其特征在于包括：主份电源模块(101)，主份恒流设置模块(102)，主份恒流驱动模块(103)，备份电源模块(201)，备份恒流设置模块(202)，备份恒流驱动模块(203)，主份电源选择开关(K1-A)，备份电源选择开关(K1-B)，主份恒流设置模块选择开关(K2-A)，备份恒流设置模块选择开关(K2-B)，信号电源选择开关(K3)，功率电源选择开关(K4)，恒流驱动模块选择开关(K5)，主份正信号电源线或二极管(D1-A)，备份正信号电源线或二极管(D1-B)，主份负信号电源线或二极管(D2-A)，备份负信号电源线或二极管(D2-B)，主份正功率电源线或二极管(D3-A)，备份正功率电源线或二极管(D3-B)，主份负功率电源线或二极管(D4-A)，备份负功率电源线或二极管(D4-B)；1. a reconfigurable high-reliability constant current drive system is characterized in that comprising: a main power supply module (101), a main part constant current setting module (102), a main part constant current drive module (103), a backup power supply Module (201), backup constant current setting module (202), backup constant current drive module (203), main power selection switch (K1-A), backup power selection switch (K1-B), main constant current setting module Selection switch (K2-A), backup constant current setting module selection switch (K2-B), signal power selection switch (K3), power supply selection switch (K4), constant current drive module selection switch (K5), the main part is positive Signal power line or diode (D1-A), backup positive signal power line or diode (D1-B), main negative signal power line or diode (D2-A), backup negative signal power line or diode (D2-B) , the main positive power line or diode (D3-A), the backup positive power line or diode (D3-B), the main negative power line or diode (D4-A), the backup negative power line or diode ( D4-B); 所述信号电源选择开关(K3)和功率电源选择开关(K4)为双刀双掷开关；信号电源选择开关(K3)，包括六个触点，分别为：第一固定端、第二固定端、第一常闭端、第一常开端、第二常闭端、第二常开端；功率电源选择开关(K4)，包括六个触点，分别为：第一固定端、第二固定端、第一常闭端、第一常开端、第二常闭端、第二常开端；The signal power selection switch (K3) and the power power selection switch (K4) are double-pole double-throw switches; the signal power selection switch (K3) includes six contacts, which are: a first fixed end and a second fixed end , the first normally closed terminal, the first normally open terminal, the second normally closed terminal, the second normally open terminal; the power supply selection switch (K4), including six contacts, namely: the first fixed terminal, the second fixed terminal, The first normally closed end, the first normally open end, the second normally closed end, the second normally open end; 所述主份电源选择开关(K1-A)将主份电源模块(101)输入端(VA)与主份一次电源(VIN-A)相连，用于控制主份电源模块(101)加断电；主份电源模块(101)加电后，对主份一次电源(VIN-A)进行电压转换，输出主份双极型信号电源和主份双极型功率电源；所述主份双极型信号电源包括主份正信号电源(+V1A)和主份负信号电源(-V1A)；所述主份双极型功率电源包括主份正功率电源(+V2A)和主份负功率电源(-V2A)；The main power supply selection switch (K1-A) connects the input terminal (VA) of the main power supply module (101) with the primary power supply (VIN-A) of the main power supply, and is used to control the power supply of the main power supply module (101) to power on and off ; After the main power supply module (101) is powered on, it performs voltage conversion on the main power supply (VIN-A), and outputs the main bipolar signal power supply and the main bipolar power supply; the main bipolar power supply The signal power supply includes the main part positive signal power supply (+V1A) and the main part negative signal power supply (-V1A); the main part bipolar power supply includes the main part positive power supply (+V2A) and the main part negative power supply (-V1A) V2A); 所述备份电源选择开关(K1-B)将备份电源模块(201)输入端(VB)与备份一次电源(VIN-B)相连，用于控制备份电源模块(201)加断电；备份电源模块(201)加电后，对备份一次电源(VIN-B)进行电压转换，输出备份双极型信号电源和备份双极型功率电源；所述备份双极型信号电源包括备份正信号电源(+V1B)和备份负信号电源(-V1B)；所述备份双极型功率电源包括备份正功率电源(+V2B)和备份负功率电源(-V2B)；The backup power selection switch (K1-B) connects the input terminal (VB) of the backup power module (201) with the backup primary power supply (VIN-B), and is used to control the backup power module (201) to power on and off; the backup power module (201) After power-on, voltage conversion is performed on the backup primary power supply (VIN-B), and a backup bipolar signal power supply and a backup bipolar power supply are output; the backup bipolar signal power supply includes a backup positive signal power supply (+ V1B) and backup negative signal power supply (-V1B); the backup bipolar power supply includes backup positive power supply (+V2B) and backup negative power supply (-V2B); 所述主份正信号电源(+V1A)和备份正信号电源(+V1B)分别送至主份正信号电源线或二极管(D1-A)和备份正信号电源线或二极管(D1-B)的阳极，主份正信号电源线或二极管(D1-A)和备份正信号电源线或二极管(D1-B)的阴极相连后作为正信号电源(+V1-AB)，送至信号电源选择开关(K3)的第一固定端；所述信号电源选择开关(K3)的第一常闭端(K3的触点2)和第一常开端分别连接至主份恒流驱动模块(103)的信号电源正端(+V1-A)和备份恒流驱动模块(203)的信号电源正端(+V1-B)；The main positive signal power supply (+V1A) and the backup positive signal power supply (+V1B) are respectively sent to the main positive signal power supply line or diode (D1-A) and the backup positive signal power supply line or diode (D1-B). The anode, the main positive signal power line or diode (D1-A) is connected with the cathode of the backup positive signal power line or diode (D1-B) as a positive signal power supply (+V1-AB), and sent to the signal power selection switch ( The first fixed terminal of K3); the first normally closed terminal (contact 2 of K3) and the first normally open terminal of the signal power selection switch (K3) are respectively connected to the signal power supply of the main constant current drive module (103). Positive terminal (+V1-A) and signal power positive terminal (+V1-B) of backup constant current drive module (203); 信号电源选择开关(K3)，包括六个触点，分别为：第一固定端、第二固定端、第一常闭端、第一常开端、第二常闭端、第二常开端；Signal power selection switch (K3), including six contacts, namely: a first fixed end, a second fixed end, a first normally closed end, a first normally open end, a second normally closed end, and a second normally open end; 所述主份负信号电源(-V1A)和备份负信号电源(-V1B)分别送至主份负信号电源线或二极管(D2-A)和备份负信号电源线或二极管(D2-B)的阴极，主份负信号电源线或二极管(D2-A)和备份负信号电源线或二极管(D2-B)的阳极相连后作为负信号电源(-V1-AB)，送至信号电源选择开关(K3)的第二固定端；所述信号电源选择开关(K3)的第二常闭端(K3的触点5)和第二常开端分别连接至主份恒流驱动模块(103)的信号电源负端(-V1-A)和备份恒流驱动模块(203)的信号电源负端(-V1-B)；The main negative signal power supply (-V1A) and the backup negative signal power supply (-V1B) are respectively sent to the main negative signal power supply line or diode (D2-A) and the backup negative signal power supply line or diode (D2-B). The cathode, the main negative signal power line or diode (D2-A) is connected to the anode of the backup negative signal power line or diode (D2-B) as a negative signal power supply (-V1-AB), and sent to the signal power selection switch ( The second fixed terminal of K3); the second normally closed terminal (contact 5 of K3) and the second normally open terminal of the signal power selection switch (K3) are respectively connected to the signal power supply of the main constant current drive module (103). The negative terminal (-V1-A) and the negative terminal (-V1-B) of the signal power supply of the backup constant current drive module (203); 所述主份正功率电源(+V2A)和备份正功率电源(+V2B)分别送至主份正功率电源线或二极管(D3-A)和备份正功率电源线或二极管(D3-B)的阳极，主份正功率电源线或二极管(D3-A)和备份正功率电源线或二极管(D3-B)的阴极相连后作为正功率电源(+V2-AB)，送至功率电源选择开关(K4)的第一固定端；所述功率电源选择开关(K4)的第一常闭端(K4的触点2)和第一常开端分别连接至主份恒流驱动模块(103)的功率电源正端(+V2-A)和备份恒流驱动模块(203)的功率电源正端(+V2-B)；The main positive power supply (+V2A) and the backup positive power supply (+V2B) are respectively sent to the main positive power supply line or diode (D3-A) and the backup positive power supply line or diode (D3-B). The anode, the main positive power line or diode (D3-A) is connected to the cathode of the backup positive power line or diode (D3-B) as a positive power supply (+V2-AB), and sent to the power supply selection switch ( The first fixed terminal of K4); the first normally closed terminal (contact 2 of K4) and the first normally open terminal of the power source selection switch (K4) are respectively connected to the power source of the main constant current drive module (103). The positive terminal (+V2-A) and the positive terminal (+V2-B) of the power supply of the backup constant current drive module (203); 所述主份负功率电源(-V2A)和备份负功率电源(-V2B)分别送至主份负功率电源线或二极管(D4-A)和备份负功率电源线或二极管(D4-B)的阴极，主份负功率电源线或二极管(D4-A)和备份负功率电源线或二极管(D4-B)的阳极相连后作为负功率电源(-V2-AB)，送至功率电源选择开关(K4)的第二固定端；所述功率电源选择开关(K4)的第二常闭端和第二常开端(K4的触点6)分别连接至主份恒流驱动模块(103)的功率电源负端(-V2-A)和备份恒流驱动模块(203)的功率电源负端(-V2-B)；The main negative power supply (-V2A) and the backup negative power supply (-V2B) are respectively sent to the main negative power supply line or diode (D4-A) and the backup negative power supply line or diode (D4-B). The cathode, the main negative power supply line or diode (D4-A) is connected with the anode of the backup negative power supply line or diode (D4-B) as a negative power supply (-V2-AB), and sent to the power supply selection switch ( The second fixed terminal of K4); the second normally closed terminal and the second normally open terminal (contact 6 of K4) of the power source selection switch (K4) are respectively connected to the power source of the main constant current drive module (103) The negative terminal (-V2-A) and the negative terminal (-V2-B) of the power supply of the backup constant current drive module (203); 所述主份恒流驱动模块(103)的恒流输出正端(IL-A+)和恒流输出负端(IL-A-)分别连接至所述恒流驱动模块选择开关(K5)的第一常闭端(K5的触点2)和第二常闭端；The constant current output positive terminal (IL-A+) and the constant current output negative terminal (IL-A-) of the main constant current drive module (103) are respectively connected to the No. 1 of the constant current drive module selection switch (K5). A normally closed terminal (contact 2 of K5) and a second normally closed terminal; 所述备份恒流驱动模块(203)的恒流输出正端(IL-B+)和恒流输出负端(IL-B-)分别连接至所述恒流驱动模块选择开关(K5)的第一常开端和第二常开端；The constant current output positive terminal (IL-B+) and the constant current output negative terminal (IL-B-) of the backup constant current driving module (203) are respectively connected to the first terminal of the constant current driving module selection switch (K5). Normally Open and Second Normally Open; 所述恒流驱动模块选择开关(K5)的第一固定端和第二固定端分别与负载(RL)两端相连。The first fixed end and the second fixed end of the constant current drive module selection switch (K5) are respectively connected to both ends of the load (RL). 2.根据权利要求1所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述主份电源模块(101)或备份电源模块(201)能够通过信号电源选择开关(K3)和功率电源选择开关(K4)给主份恒流驱动模块(103)或备份恒流驱动模块(203)供电。2. A reconfigurable high-reliability constant-current drive system according to claim 1, characterized in that: the main power supply module (101) or the backup power supply module (201) can be selected by a signal power supply switch (K3 ) and the power source selection switch (K4) to supply power to the main constant current drive module (103) or the backup constant current drive module (203). 3.根据权利要求1所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述信号电源选择开关(K3)和功率电源选择开关(K4)同时动作，同一时刻有且仅有一份恒流驱动模块由所述主份电源模块(101)或备份电源模块(201)供电。3. A reconfigurable high-reliability constant-current drive system according to claim 1, characterized in that: the signal power selection switch (K3) and the power power selection switch (K4) act simultaneously, and at the same time there are and Only one copy of the constant current drive module is powered by the primary power supply module (101) or the backup power supply module (201). 4.根据权利要求1所述的一种可重构的高可靠恒流驱动系统，其特征在于：主份恒流设置模块(102)接收外部输入的数字量控制命令，对数字量控制命令进行数模转换后，输出主份正电流信号(IA+)和主份负电流信号(IA-)，并分别送至所述主份恒流设置模块选择开关(K2-A)的第一固定端和第二固定端；4. a kind of reconfigurable high-reliability constant current drive system according to claim 1, is characterized in that: the main part constant current setting module (102) receives the digital quantity control command of external input, carries out the digital quantity control command After the digital-to-analog conversion, the main part positive current signal (IA+) and the main part negative current signal (IA-) are output, and sent to the first fixed terminal and the main part constant current setting module selection switch (K2-A) respectively. the second fixed end; 备份恒流设置模块(202)接收外部输入的数字量控制命令，对数字量控制命令进行数模转换后，输出备份正电流信号(IB+)和备份负电流信号(IB-)，并分别连接至所述备份恒流设置模块选择开关(K2-B)的第一固定端和第二固定端；The backup constant current setting module (202) receives the digital quantity control command input from the outside, and after digital-to-analog conversion is performed on the digital quantity control command, it outputs a backup positive current signal (IB+) and a backup negative current signal (IB-), which are respectively connected to the first fixed end and the second fixed end of the backup constant current setting module selection switch (K2-B); 主份恒流设置模块选择开关(K2-A)的第一常闭端和备份恒流设置模块选择开关(K2-B)的第一常开端相连，然后连接主份恒流驱动模块(103)的恒流设置信号正端(IAB-A+)；The first normally closed terminal of the main part constant current setting module selection switch (K2-A) is connected to the first normally open terminal of the backup constant current setting module selection switch (K2-B), and then connected to the main part constant current drive module (103) The positive terminal of the constant current setting signal (IAB-A+); 主份恒流设置模块选择开关(K2-A)的第一常开端和备份恒流设置模块选择开关(K2-B)的第一常闭端相连，然后连接备份恒流驱动模块(203)的恒流设置信号正端(IAB-B+)；The first normally open terminal of the main constant current setting module selection switch (K2-A) is connected to the first normally closed terminal of the backup constant current setting module selection switch (K2-B), and then connected to the backup constant current drive module (203). Positive terminal of constant current setting signal (IAB-B+); 主份恒流设置模块选择开关(K2-A)的第二常闭端和备份恒流设置模块选择开关(K2-B)的第二常开端相连，然后连接主份恒流驱动模块(103)的恒流设置信号负端(IAB-A-)；The second normally closed terminal of the main constant current setting module selection switch (K2-A) is connected to the second normally open terminal of the backup constant current setting module selection switch (K2-B), and then connected to the main constant current drive module (103) The negative terminal of the constant current setting signal (IAB-A-); 主份恒流设置模块选择开关(K2-A)的第二常开端和备份恒流设置模块选择开关(K2-B)的第二常闭端相连，然后连接备份恒流驱动模块(203)的恒流设置信号负端(IAB-B-)。The second normally open terminal of the main constant current setting module selection switch (K2-A) is connected to the second normally closed terminal of the backup constant current setting module selection switch (K2-B), and then connected to the second normally closed terminal of the backup constant current setting module (203). Constant current setting signal negative terminal (IAB-B-). 5.根据权利要求4所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述主份恒流设置模块选择开关(K2-A)和备份恒流设置模块选择开关(K2-B)为双刀双掷开关；主份恒流设置模块选择开关(K2-A)，包括六个触点，分别为：第一固定端、第二固定端、第一常闭端、第一常开端、第二常闭端、第二常开端；备份恒流设置模块选择开关(K2-B)，包括六个触点，分别为：第一固定端、第二固定端、第一常闭端、第一常开端、第二常闭端、第二常开端。5. a kind of reconfigurable high-reliability constant current drive system according to claim 4, is characterized in that: described main part constant current setting module selection switch (K2-A) and backup constant current setting module selection switch ( K2-B) is a double-pole double-throw switch; the main constant current setting module selection switch (K2-A) includes six contacts, namely: the first fixed end, the second fixed end, the first normally closed end, The first normally open terminal, the second normally closed terminal, the second normally open terminal; the backup constant current setting module selector switch (K2-B), including six contacts, namely: the first fixed terminal, the second fixed terminal, the first fixed terminal Normally closed end, first normally open end, second normally closed end, second normally open end. 6.根据权利要求5所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述主份恒流设置模块选择开关(K2-A)和备份恒流设置模块选择开关(K2-B)同时动作，同一时刻有且仅有一份恒流设置模块与一份恒流驱动模块相连；所述一份恒流设置模块为主份恒流设置模块(102)或备份恒流设置模块(202)；所述一份恒流驱动模块为主份恒流驱动模块(103)或备份恒流驱动模块(203)。6. a kind of reconfigurable high-reliability constant current drive system according to claim 5, is characterized in that: described main part constant current setting module selection switch (K2-A) and backup constant current setting module selection switch ( K2-B) act simultaneously, and at the same time, there is one and only one copy of the constant current setting module is connected with one copy of the constant current drive module; the one copy of the constant current setting module is the master constant current setting module (102) or the backup constant current setting module A module (202); the one-part constant-current driving module is a main-part constant-current driving module (103) or a backup constant-current driving module (203). 7.根据权利要求5所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述主份和备份恒流设置模块由数模转换器实现，所述数模转换器为电流输出型。7. A reconfigurable high-reliability constant-current drive system according to claim 5, wherein the main and backup constant-current setting modules are implemented by a digital-to-analog converter, and the digital-to-analog converter is Current output type. 8.根据权利要求1所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述恒流驱动模块选择开关(K5)为双刀双掷开关；恒流驱动模块选择开关(K5)，包括六个触点，分别为：第一固定端、第二固定端、第一常闭端、第一常开端、第二常闭端、第二常开端。8. A reconfigurable high-reliability constant-current drive system according to claim 1, characterized in that: the constant-current drive module selection switch (K5) is a double-pole double-throw switch; the constant-current drive module selection switch (K5), including six contacts, namely: a first fixed end, a second fixed end, a first normally closed end, a first normally open end, a second normally closed end, and a second normally open end. 9.根据权利要求1所述的一种可重构的高可靠恒流驱动系统，其特征在于：所述恒流驱动模块选择开关(K5)与所述信号电源选择开关(K3)和所述功率电源选择开关(K4)同时动作。9. A reconfigurable high-reliability constant-current drive system according to claim 1, characterized in that: the constant-current drive module selection switch (K5), the signal power selection switch (K3) and the The power source selection switch (K4) operates at the same time.
CN202011185091.2A 2020-10-29 2020-10-29 A Reconfigurable High Reliability Constant Current Drive System Active CN112527039B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011185091.2A CN112527039B (en) 2020-10-29 2020-10-29 A Reconfigurable High Reliability Constant Current Drive System

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011185091.2A CN112527039B (en) 2020-10-29 2020-10-29 A Reconfigurable High Reliability Constant Current Drive System

Publications (2)

Publication Number Publication Date
CN112527039A CN112527039A (en) 2021-03-19
CN112527039B true CN112527039B (en) 2022-01-04

Family

ID=74980545

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011185091.2A Active CN112527039B (en) 2020-10-29 2020-10-29 A Reconfigurable High Reliability Constant Current Drive System

Country Status (1)

Country Link
CN (1) CN112527039B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107196403A (en) * 2017-05-19 2017-09-22 上海宇航系统工程研究所 A kind of solar battery array driver suitable for long continuous operation
CN108749634A (en) * 2018-07-10 2018-11-06 国充充电科技江苏股份有限公司 It is a kind of to power off the charging bow system that automatically resets
CN208782560U (en) * 2018-09-05 2019-04-23 深圳市同鑫科技有限公司 Gantry frame type advices plate modular circuit
US10651728B2 (en) * 2016-10-04 2020-05-12 Delta Electronics, Inc. Power supply device and control method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10651728B2 (en) * 2016-10-04 2020-05-12 Delta Electronics, Inc. Power supply device and control method thereof
CN107196403A (en) * 2017-05-19 2017-09-22 上海宇航系统工程研究所 A kind of solar battery array driver suitable for long continuous operation
CN108749634A (en) * 2018-07-10 2018-11-06 国充充电科技江苏股份有限公司 It is a kind of to power off the charging bow system that automatically resets
CN208782560U (en) * 2018-09-05 2019-04-23 深圳市同鑫科技有限公司 Gantry frame type advices plate modular circuit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Design of a switching-mode power supply with UPS features;D.K.W. Cheng et al.;《 Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95》;19950224;全文 *
浅析对特别重要负荷供电方案的选择;李式忠;《广播与电视技术》;20000930(第9期);全文 *

Also Published As

Publication number Publication date
CN112527039A (en) 2021-03-19

Similar Documents

Publication Publication Date Title
CN104883793A (en) Multi-path LED current-constant drive circuit and drive method
CN112803572B (en) Satellite power supply system with fault reconstruction function
Aravind et al. A transformerless non-isolated multi-port DC–DC converter for hybrid energy applications
CN112527039B (en) A Reconfigurable High Reliability Constant Current Drive System
CN110323930B (en) Modularized multi-level direct current solid-state transformer and fault tolerance method
CN111708401B (en) Photovoltaic module maximum power tracking method suitable for multiple connection modes
US20250226748A1 (en) Bidirectional dc/dc converter, energy storage device and control method thereof
CN103970178A (en) S4R circuit topology mixing type control method
CN108718156A (en) A kind of adjustable constant-power direct-current power supply system of output voltage wide scope
CN111211679A (en) High-power high-transformation-ratio high-voltage direct-current converter for space and photovoltaic power generation system
CN113791663B (en) High-power spacecraft power supply system based on solar cell array maximum power point tracking technology
US6370048B1 (en) AC power system with redundant AC power sources
Mohanty SEPIC based multi input DC-DC converter
CN113497551B (en) Direct-current power supply multi-path output protection circuit unit, protection circuit and underwater robot
CN114268145A (en) A charge-discharge regulator and regulation method based on droop control
CN111458554B (en) High-precision current monitoring circuit
CN113141004B (en) Automatic power-up circuit of small satellite and control method thereof
CN113904543A (en) High-voltage bus power controller applied to space
Samadi et al. Boost converter topologies, hybrid boost and new topologies of voltage multiplier in photovoltaic systems
CN222582293U (en) Three-port high-gain DC converter
CN220510454U (en) Circuit structure for realizing current protection of multi-channel pumping laser
CN111106749A (en) Multi-path half-bridge power supply and control method thereof
Chaubey et al. Design techniques for zero steady-state output ripple in digital low dropout regulators
CN114628196B (en) Novel relay control circuit
CN221177522U (en) Auxiliary circuit and switching power supply

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant