CN107947773B - Power supply soft start-stop and protection device for magnetic isolation control semiconductor switch and electric system - Google Patents
Power supply soft start-stop and protection device for magnetic isolation control semiconductor switch and electric system Download PDFInfo
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- CN107947773B CN107947773B CN201711226585.9A CN201711226585A CN107947773B CN 107947773 B CN107947773 B CN 107947773B CN 201711226585 A CN201711226585 A CN 201711226585A CN 107947773 B CN107947773 B CN 107947773B
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- 239000003990 capacitor Substances 0.000 claims description 17
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- 238000004146 energy storage Methods 0.000 claims description 8
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/13—Modifications for switching at zero crossing
- H03K17/133—Modifications for switching at zero crossing in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
- H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
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Abstract
The invention relates to a power soft start-stop and protection device of a magnetic isolation control semiconductor switch and an electric system, belonging to the technical field of spacecraft power supply.
Description
Technical Field
The invention relates to the technical field of spacecraft power supplies, in particular to a power supply soft start-stop and protection device for a magnetic isolation control semiconductor switch and an electrical system.
Background
With the rapid development of the aerospace technology, the types of electric equipment of the spacecraft are more and more, the number of the electric equipment is more and more, the power is changed from original thousands of watts to tens of kilowatts, hundreds of kilowatts are needed in the future, even higher power is needed, the voltage of a power supply bus is higher and higher, a large number of 100V voltage buses are used, 160V voltage buses are being popularized, 250V buses and 400V buses are being researched and developed, and buses above 500V and even higher are expected to be needed in the future according to requirements.
In a ground system, the connection between electric equipment and bus voltage is generally realized by adopting methods such as insurance, an air switch, a contactor and the like, and can also be realized by adopting an optical coupler to control a semiconductor switch. However, in the aerospace power technology, methods such as insurance, an air switch, a contactor and the like are adopted, so that the volume and the weight are too large, and no device with proper aerospace grade exists; due to radiation displacement benefits, optocouplers degrade quickly and even fail, and cannot be directly applied under spatial environmental conditions. In the existing space power supply technology, the following existing method is used for realizing connection between a bus and electric equipment:
1) The bus is directly connected with the electric equipment, and no protective measures are adopted in the middle, so that the device is few, the circuit structure is simple, and an additional controller is not needed; the defect is that no fault protection and isolation function, such as any electric equipment fault, can lead to the fault of all electric equipment on the bus, and more importantly: in the launching process of the spacecraft, a low-pressure stage, such as loading of a bus with high voltage, is needed, so that low-pressure discharge can be caused, and equipment failure can be caused, and therefore, the technology is difficult to use in a high-voltage bus.
2) The relay technology is adopted, and the soft start circuit can be controlled by adopting the relay which is the same as the ground system, but the system has large volume, heavy weight and low protection speed, and can possibly cause the bus system to fail.
3) The solid-state power distribution technology is adopted, the solid-state power controller is a core device of the solid-state power distribution technology, the solid-state controller realizes on-off control of a circuit through a MOSFET and an IGBT, rated current of the 28V solid-state power controller is in a range of several to tens of amperes, and power distribution of higher power can be realized by adopting a contactor with an additional protection function. Under the condition of high voltage and high current, the solid-state power distribution technology is adopted, so that an isolated auxiliary power supply is needed for the solid-state power controller, and a contactor with an additional protection function is needed.
In the last twenty years, high-power semiconductor switching MOSFETs have evolved rapidly, with the following advantages: 1) In the off state, the resistance value of the MOSFET switch is more than tens of megaohms; in the on state, its resistance value may be as low as a few milliohms; 2) The MOSFET can work in a linear working area and a saturated working area by changing the grid voltage, and the switching time can be less than 1 microsecond; 3) The working current ranges from a few amperes to hundreds of amperes, and the voltage can reach kilovolts; 4) The control mode is very simple, and the on-off of the controller can be realized by applying a voltage of a plurality of volts to the grid electrode.
According to MOSFET characteristics, the invention provides a power supply soft start-stop and quick protection device and an electrical system for a magnetic isolation control power semiconductor switch, so as to overcome the defect that a bus is connected with electric equipment in the existing aerospace power supply technology.
Disclosure of Invention
In order to solve various defects in the prior art, a power supply soft start-stop and protection device and an electric system of a magnetic isolation control semiconductor switch are provided, wherein the device adopts the magnetic isolation control power semiconductor switch, and when the power supply is started, a front-stage high-voltage bus is stably connected with electric equipment; when the power supply is turned off, the front-stage high-voltage bus is stably separated from the electric equipment; when overcurrent faults occur to the electric equipment, the rapid separation of the front-stage high-voltage bus and the electric equipment is realized.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A power soft start-stop and protection device of a magnetic isolation control semiconductor switch comprises a bus connection loop, a grid control and drive loop and a signal control input end;
The bus connection loop comprises a high-voltage bus connection end, a power semiconductor switching MOSFET, a load pull-down resistor, a load input capacitor, electric equipment and a bus loop ground connection end, wherein the high-voltage bus connection end is sequentially connected with the power semiconductor switching MOSFET, the load pull-down resistor and the bus loop ground connection end in series, and the load input capacitor and the electric equipment are connected with two ends of the load pull-down resistor in parallel;
The grid control and drive circuit comprises a low-voltage direct-current linear adjustable power supply, a magnetic isolation transformer, a low-voltage high-frequency switching tube, a control loop ground connection end and a control signal rectifier bridge, wherein the low-voltage direct-current linear adjustable power supply is sequentially connected with a primary coil of the magnetic isolation transformer, the low-voltage high-frequency switching tube and the control loop ground connection end in series, the output end of a secondary coil of the magnetic isolation transformer is connected to the alternating current input end of the control signal rectifier bridge, and the direct current output end of the control signal rectifier bridge is connected to the grid of the power semiconductor switch MOSFET;
The signal control input end comprises a direct current control signal input end, a pulse driving signal input end and an electric equipment enabling control signal input end, wherein the direct current control signal input end is connected with a low-voltage direct current linear adjustable power supply, the pulse driving signal input end is connected with a low-voltage high-frequency switching tube, and the electric equipment enabling control signal input end is connected with electric equipment.
Further, a grid control resistor and a grid control capacitor are connected in parallel between the grid and the source of the power semiconductor switch MOSFET.
Further, a grid antistatic resistor is connected between the control end of the low-voltage high-frequency switching tube and the control loop ground connection end.
Further, the direct current control signal input end is connected with a signal source capable of being adjusted in a linear mode, the pulse driving signal input end is connected with a high-frequency pulse signal source, and the electric equipment enabling control signal input end is connected with a level signal source.
The invention also provides an electrical system, which comprises a positive voltage bus, a negative voltage bus loop and a high-voltage battery energy storage power supply for supplying power to the positive voltage bus and the negative voltage bus loop, wherein the positive voltage bus and the negative voltage bus loop are connected with at least one power soft start-stop and protection device of the magnetic isolation control semiconductor switch.
Further, the device also comprises an overcurrent detection sensor, an overcurrent signal adjusting circuit and a pull-down diode, wherein the overcurrent detection sensor is respectively connected with the high-voltage bus connecting end and the overcurrent signal adjusting circuit, one end of the pull-down diode is connected with the pulse driving signal input end, and the other end of the pull-down diode is connected with the overcurrent signal adjusting circuit.
Further, two power soft start-stop and protection devices for magnetically isolating and controlling the semiconductor switch are connected to the positive voltage bus and the negative voltage bus.
The working process of the power soft start-stop and protection device of the magnetic isolation control semiconductor switch comprises three processes, namely a soft start process, a soft stop process and a rapid protection process, wherein the specific flow of the three processes is as follows:
Soft start process: the high-voltage bus connection end and the bus loop ground connection end are connected with a high-voltage bus with hundreds of volts, the grid electrode of the power semiconductor switch MOSFET is in an off state, the resistance value of the power semiconductor switch MOSFET reaches more than a plurality of megaohms and is far greater than the resistance value of a load pull-down resistor, so that the voltage drop of the high-voltage bus is mainly carried out on the power semiconductor switch MOSFET, and the input voltage of electric equipment is far less than the working voltage of the power semiconductor switch MOSFET; when the electric equipment is in the condition of completing the condition preparation of electrifying, a signal with fixed frequency is applied to the input end of the pulse driving signal to drive the low-voltage high-frequency switching tube to work, and then a level signal is applied to the input end of the direct-current control signal to enable the output voltage of the low-voltage direct-current linear adjustable power supply to slowly rise; the output end of the magnetic isolation transformer is provided with slowly rising signal output, a slowly rising control signal is output through a control signal rectifier bridge and is applied to the grid electrode of the power semiconductor switch MOSFET, the resistance value of the power semiconductor switch MOSFET is gradually reduced, and the current slowly charges the load input capacitor through the power semiconductor switch MOSFET; along with the gradual rise of the voltage of the grid electrode of the power semiconductor switching MOSFET, the power semiconductor switching MOSFET is completely turned on, the resistance value of the power semiconductor switching MOSFET is reduced to tens of milliohms, and the bus voltage is completely on the electric equipment; and finally, inputting a level signal into the electric equipment enabling control signal input end, starting the electric equipment to work, and finishing the soft start process.
Soft stop procedure: firstly stopping the enabling signal of the enabling control signal input end of the electric equipment, stopping the electric equipment, then stopping the input signal of the pulse driving signal input end, stopping the low-voltage high-frequency switching tube, reducing the control voltage on the grid electrode of the power semiconductor switching MOSFET to zero, closing the MOSFET, stopping supplying power to the electric equipment, discharging the electric energy on the load input capacitor through the load pull-down resistor, gradually reducing the voltage on the electric equipment to zero, separating the bus from the electric equipment, and finally stopping the control signal of the direct-current control signal input end, thereby completing the soft stop of the power supply.
The rapid protection process comprises the following steps: in the operation process, the bus system detects that the current value exceeds a set value, an overcurrent signal is generated, the overcurrent signal cuts off a driving signal of a pulse driving signal input end through a grid electrode of a pull-down low-voltage high-frequency switching tube, the low-voltage high-frequency switching tube immediately stops working, a control signal rectifier bridge stops outputting, a grid electrode control resistor and a grid electrode control capacitor are connected between the grid electrode and a source electrode of a power semiconductor switching MOSFET in parallel to discharge, the grid electrode voltage is rapidly reduced, and a power semiconductor switching MOSFET rapid cut-off circuit is used for realizing rapid protection of the system.
The beneficial effects of the invention are as follows:
The power soft start-stop and protection device of the magnetic isolation control semiconductor switch can apply a control signal to control a power semiconductor MOSFET switch under hundreds of volts of high potential at the ground potential, so that the connection and disconnection of a bus and electric equipment are realized, and meanwhile, the device can play roles of a fuse, an air switch and a contactor; the magnetic isolation transformer is adopted to realize the transmission of control signals, and the requirement of a power supply system on high reliability in a space environment is met.
Drawings
FIG. 1 is a circuit diagram of a power soft start and stop and protection device of a magnetically isolated control semiconductor switch of the present invention;
fig. 2 is a circuit diagram of the electrical system of the present invention.
In the accompanying drawings: the power supply comprises a 1-high-voltage bus connecting end, a 2-power semiconductor switching MOSFET, a 3-grid control resistor, a 4-load pull-down resistor, a 5-load input capacitor, 6-electric equipment, a 7-direct current control signal input end, an 8-low-voltage direct current linear adjustable power supply, a 9-magnetic isolation transformer, a 10-control signal rectifier bridge, an 11-grid control capacitor, a 12-pulse driving signal input end, a 13-grid antistatic resistor, a 14-low-voltage high-frequency switching tube, a 15-bus loop ground connecting end, a 16-control loop ground connecting end, a 17-electric equipment enabling control signal input end, an 18-positive voltage bus, a 19-negative voltage bus, a 20-high-voltage battery energy storage power supply, a 21-first device, a 22-second device, a 23-overcurrent detection sensor, a 24-overcurrent signal adjusting circuit and a 25-pull-down diode.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described in the following with reference to the accompanying drawings, and based on the embodiments of the present application, other similar embodiments obtained by those skilled in the art without making any inventive effort should be included in the scope of protection of the present application.
Embodiment one:
as shown in FIG. 1, the power soft start-stop and protection device of the magnetic isolation control semiconductor switch comprises a bus connection loop, a grid control and drive loop and a signal control input end.
Specifically, the bus connection loop comprises a high-voltage bus connection end 1, a power semiconductor switch MOSFET2, a load pull-down resistor 4, a load input capacitor 5, electric equipment 6 and a bus loop ground connection end 15, wherein the high-voltage bus connection end 1 is sequentially connected with the power semiconductor switch MOSFET2, the load pull-down resistor 4 and the bus loop ground connection end 15 in series, the load input capacitor 5 and the electric equipment 6 are connected with two ends of the load pull-down resistor 4 in parallel, and a grid control resistor 3 and a grid control capacitor 11 are connected between a grid and a source of the power semiconductor switch MOSFET2 in parallel.
The grid control and driving circuit comprises a low-voltage direct-current linear adjustable power supply 8, a magnetic isolation transformer 9, a low-voltage high-frequency switch tube 14, a control loop ground connection end 16 and a control signal rectifier bridge 10, wherein the low-voltage direct-current linear adjustable power supply 8 is sequentially connected with a primary coil of the magnetic isolation transformer 9, the low-voltage high-frequency switch tube 14 and the control loop ground connection end 16 in series, an output end of a secondary coil of the magnetic isolation transformer 9 is connected to an alternating current input end of the control signal rectifier bridge 10, a direct current output end of the control signal rectifier bridge 10 is connected to a grid electrode of the power semiconductor switch MOSFET2, and a grid antistatic resistor 13 is connected between a control end of the low-voltage high-frequency switch tube 14 and the control loop ground connection end 16.
The signal control input end comprises a direct current control signal input end 7, a pulse driving signal input end 12 and an electric equipment enabling control signal input end 17, wherein the direct current control signal input end 7 is connected with a low-voltage direct current linear adjustable power supply 8, the pulse driving signal input end 12 is connected with a low-voltage high-frequency switch tube 14, the electric equipment enabling control signal input end 17 is connected with an electric equipment 6, the direct current control signal input end 7 is connected with a signal source capable of being adjusted linearly, the pulse driving signal input end 12 is connected with a high-frequency pulse signal source, and the electric equipment enabling control signal input end 17 is connected with a level signal source.
The working process of the power soft start-stop and protection device of the magnetic isolation control semiconductor switch comprises three processes, namely a soft start process, a soft stop process and a rapid protection process, wherein the specific flow of the three processes is as follows:
Soft start process: the high-voltage bus connection end 1 and the bus loop ground connection end 15 are connected with a high-voltage bus of hundreds of volts, the grid electrode of the power semiconductor switch MOSFET2 is in an off state, the resistance value of the grid electrode reaches more than a plurality of megaohms and is far greater than the resistance value of the load pull-down resistor 4, so that the voltage drop of the high-voltage bus is mainly carried out on the power semiconductor switch MOSFET2, and the input voltage of the electric equipment 6 is far less than the working voltage of the power semiconductor switch MOSFET; when the electric equipment 6 finishes the condition preparation of electrifying, a signal with fixed frequency is applied to the pulse driving signal input end 12 to drive the low-voltage high-frequency switching tube 14 to work, and then a level signal is applied to the direct-current control signal input end 7 to enable the output voltage of the low-voltage direct-current linear adjustable power supply 8 to slowly rise; the slowly rising signal output is obtained at the output end of the magnetic isolation transformer 9, a slowly rising control signal is output through the control signal rectifier bridge 10, the signal is applied to the grid electrode of the power semiconductor switch MOSFET2, the resistance value of the power semiconductor switch MOSFET2 gradually drops, and the current slowly charges the load input capacitor 5 through the power semiconductor switch MOSFET 2; along with the gradual rise of the voltage of the grid electrode of the power semiconductor switching MOSFET2, the power semiconductor switching MOSFET2 is completely turned on, the resistance value of the power semiconductor switching MOSFET is reduced to tens of milliohms, and the bus voltage is completely on the electric equipment 6; finally, a level signal is input into the electric equipment enabling control signal input end 17, the electric equipment 6 starts to work, and the soft start process is completed.
Soft stop procedure: firstly stopping the enabling signal of the enabling control signal input end 17 of the electric equipment, stopping the operation of the electric equipment 6, then stopping the input signal of the pulse driving signal input end 12, stopping the operation of the low-voltage high-frequency switching tube 14, reducing the control voltage on the grid electrode of the power semiconductor switching MOSFET2 to zero, closing the MOSFET, stopping the power supply to the electric equipment 6, discharging the electric energy on the load input capacitor 5 through the load pull-down resistor 4, gradually reducing the voltage on the electric equipment 6 to zero, separating the bus from the electric equipment 6, and finally stopping the control signal of the direct-current control signal input end 7, thereby completing the soft stop of the power supply.
The rapid protection process comprises the following steps: in the operation process, the bus system detects that the current value exceeds a set value, an overcurrent signal is generated, the overcurrent signal cuts off a driving signal of a pulse driving signal input end 12 through pulling down the grid electrode of the low-voltage high-frequency switching tube 14, the low-voltage high-frequency switching tube 14 immediately stops working, the signal rectifier bridge 10 is controlled to stop outputting, the grid electrode control resistor 3 and the grid electrode control capacitor 11 are connected in parallel between the grid electrode and the source electrode of the power semiconductor switching MOSFET2 to discharge, the grid electrode voltage is rapidly reduced, and the power semiconductor switching MOSFET2 is rapidly cut off in a circuit, so that the rapid protection of the system is realized.
The power soft start-stop and protection device of the magnetic isolation control semiconductor switch can apply a control signal to control the power semiconductor MOSFET switch 2 under hundreds of volts of high potential at the ground potential, so that the connection and disconnection of the bus and the electric equipment 6 are realized, and the power soft start-stop and protection device can play roles of a fuse, an air switch and a contactor; the magnetic isolation transformer 9 is adopted to realize the transmission of control signals, thereby meeting the requirement of high reliability of the power supply system in space environment.
Embodiment two:
As shown in fig. 2, an electrical system includes a positive voltage bus 18, a negative voltage bus loop 19, and a high voltage battery energy storage power supply 20 for supplying power to the positive voltage bus 18 and the negative voltage bus loop 19, wherein the high voltage battery energy storage power supply 20 supplies 400V to 500V to the positive voltage bus 18 and the negative voltage bus loop 19, at least one power soft start-stop and protection device of the magnetic isolation control semiconductor switch is connected to the positive voltage bus 18 and the negative voltage bus loop 19, in this embodiment, two power soft start-stop and protection devices of the magnetic isolation control semiconductor switch are connected to the positive voltage bus 18 and the negative voltage bus loop 19, respectively, which are a first device 21 and a second device 22, although in other embodiments, more power soft start-stop and protection devices of the magnetic isolation control semiconductor switch may be provided.
The electrical system further comprises an overcurrent detection sensor 23, an overcurrent signal adjustment circuit 24 and a pull-down diode 25, wherein the overcurrent detection sensor 23 is respectively connected with the high-voltage bus connecting end 1 and the overcurrent signal adjustment circuit 24, one end of the pull-down diode is connected with the pulse driving signal input end 12, the other end of the pull-down diode is connected with the overcurrent signal adjustment circuit 24, the overcurrent detection sensor 23 is used for monitoring a current signal at the front end of the high-voltage bus connecting end 1, and the overcurrent signal adjustment circuit (24) and the pull-down diode 25 have the functions of: when the current exceeds the set value, the overcurrent signal adjusting circuit 24 outputs a low-level signal, and the driving signal of the pulse driving signal input end 12 is cut off by the pull-down diode 25, so that the low-voltage high-frequency switching tube 14 immediately stops working, and overcurrent protection is realized.
The electrical system is applied to a spacecraft, and before the spacecraft emits, the high-voltage battery energy storage power supply 20 cannot stop outputting, so that the positive voltage bus 18 and the negative voltage bus loop 19 continuously supply power. In order to ensure that the spacecraft safely passes through the process of being in the low-pressure stage during emission, signals of the pulse driving signal input end 12, the direct-current control signal input end 7 and the electric equipment enabling control signal input end 17 stop working, the input voltage of the electric equipment 6 is very low, and the system can be prevented from being damaged by low-pressure discharge. When the spacecraft enters a high vacuum space, signals are sequentially applied to the pulse driving signal input end 12, the direct current control signal input end 7 and the electric equipment enabling control signal input end 17 according to the soft start process of the invention, so that soft start is completed.
During operation of the electric equipment 6, the overcurrent detection sensor 23 monitors a current signal at the front end of the high-voltage bus connecting end 1, if the current signal exceeds a set protection value, the overcurrent signal adjusting circuit 24 outputs a low level, the driving signal of the pulse driving signal input end 12 is cut off through the pull-down diode 25, the low-voltage high-frequency switching tube 14 immediately stops working, the grid voltage of the power semiconductor switching MOSFET2 is rapidly reduced, fault isolation of the electric equipment 6 is completed within 1 to 10 microseconds, and rapid protection of the equipment is realized.
If the spacecraft needs to enter the power saving mode, the separation of the electric equipment 6 and the positive voltage bus 18 can be completed through a soft stop process, so that the power consumption of the system is reduced; or the spacecraft needs to return to the ground, and the separation of the electric equipment 6 and the positive voltage bus 18 is finished according to the soft stop process, so that the spacecraft is prevented from being damaged in the low-pressure stage.
The foregoing detailed description of the application has been presented for purposes of illustration and description, but is not intended to limit the scope of the application, i.e., the application is not limited to the details shown and described.
Claims (7)
1. A power soft start-stop and protection device for a magnetic isolation control semiconductor switch is characterized in that: the device comprises a bus connection loop, a grid control loop, a driving loop and a signal control input end;
The bus connection loop comprises a high-voltage bus connection end (1), a power semiconductor switching MOSFET (2), a load pull-down resistor (4), a load input capacitor (5), electric equipment (6) and a bus loop ground connection end (15), wherein the high-voltage bus connection end (1) is sequentially connected with the power semiconductor switching MOSFET (2), the load pull-down resistor (4) and the bus loop ground connection end (15) in series, and the load input capacitor (5) and the electric equipment (6) are connected in parallel with the two ends of the load pull-down resistor (4);
The grid control and drive circuit comprises a low-voltage direct-current linear adjustable power supply (8), a magnetic isolation transformer (9), a low-voltage high-frequency switching tube (14), a control loop ground connection end (16) and a control signal rectifier bridge (10), wherein the low-voltage direct-current linear adjustable power supply (8) is sequentially connected with a primary coil of the magnetic isolation transformer (9), the low-voltage high-frequency switching tube (14) and the control loop ground connection end (16) in series, the output end of a secondary coil of the magnetic isolation transformer (9) is connected to the alternating current input end of the control signal rectifier bridge (10), and the direct current output end of the control signal rectifier bridge (10) is connected to the grid electrode of the power semiconductor switching MOSFET (2);
The signal control input end comprises a direct current control signal input end (7), a pulse driving signal input end (12) and an electric equipment enabling control signal input end (17), wherein the direct current control signal input end (7) is connected with a low-voltage direct current linear adjustable power supply (8), the pulse driving signal input end (12) is connected with a low-voltage high-frequency switching tube (14), and the electric equipment enabling control signal input end (17) is connected with electric equipment (6);
The power soft start-stop and protection device of the magnetic isolation control semiconductor switch is connected to a positive voltage bus (18) and a negative voltage bus loop (19), the positive voltage bus (18) and the negative voltage bus loop (19) are powered by a high-voltage battery energy storage power supply (20), and the power supply voltage of the high-voltage battery energy storage power supply (20) to the positive voltage bus (18) and the negative voltage bus loop (19) is 400V to 500V.
2. The magnetically isolated power soft start and stop and protection device for a semiconductor switch of claim 1, wherein: a grid control resistor (3) and a grid control capacitor (11) are connected in parallel between the grid and the source of the power semiconductor switch MOSFET (2).
3. The magnetically isolated power soft start and stop and protection device for a semiconductor switch of claim 2, wherein: a grid antistatic resistor (13) is connected between the control end of the low-voltage high-frequency switching tube (14) and the control loop ground connection end (16).
4. A magnetically isolated control semiconductor switch power soft start and stop and protection device as claimed in claim 3, wherein: the direct current control signal input end (7) is connected with a signal source capable of being adjusted in a linear mode, the pulse driving signal input end (12) is connected with a high-frequency pulse signal source, and the electric equipment enabling control signal input end (17) is connected with a level signal source.
5. An electrical system, includes positive voltage bus (18), negative voltage bus return (19) and to positive voltage bus (18), negative voltage bus return (19) power supply's high voltage battery energy storage power (20), its characterized in that: at least one power soft start and stop and protection device of the magnetic isolation control semiconductor switch according to any one of claims 1 to 4 is connected to the positive voltage bus (18) and the negative voltage bus loop (19).
6. The electrical system of claim 5, wherein: the high-voltage bus is characterized by further comprising an overcurrent detection sensor (23), an overcurrent signal adjustment circuit (24) and a pull-down diode (25), wherein the overcurrent detection sensor (23) is respectively connected with the high-voltage bus connecting end (1) and the overcurrent signal adjustment circuit (24), one end of the pull-down diode is connected with the pulse driving signal input end (12), and the other end of the pull-down diode is connected with the overcurrent signal adjustment circuit (24).
7. The electrical system of claim 6, wherein: and the positive voltage bus (18) and the negative voltage bus loop (19) are connected with a power soft start-stop and protection device of two magnetic isolation control semiconductor switches.
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| CN103208925A (en) * | 2013-04-24 | 2013-07-17 | 深圳市航天新源科技有限公司 | Isolated direct current-direct current (DC-DC) converter topological circuit |
| JP2015126596A (en) * | 2013-12-26 | 2015-07-06 | 三菱電機株式会社 | High-frequency ac power-supply device |
| CN104753329A (en) * | 2015-03-24 | 2015-07-01 | 华南理工大学 | High-power switch power source soft starting circuit |
| CN105141120A (en) * | 2015-10-16 | 2015-12-09 | 兰州空间技术物理研究所 | A magnetically isolated power-on circuit |
| CN207518564U (en) * | 2017-11-29 | 2018-06-19 | 中国工程物理研究院应用电子学研究所 | The soft start and stop of power supply of Magnetic isolation control semiconductor switch and protective device and electrical system |
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