CN114301366B - Damper switching circuit controlled by electromagnetic relay - Google Patents
Damper switching circuit controlled by electromagnetic relay Download PDFInfo
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- CN114301366B CN114301366B CN202111600859.2A CN202111600859A CN114301366B CN 114301366 B CN114301366 B CN 114301366B CN 202111600859 A CN202111600859 A CN 202111600859A CN 114301366 B CN114301366 B CN 114301366B
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Abstract
The invention provides a damper switching circuit controlled by an electromagnetic relay, which comprises a rectifier circuit and a switching sub-circuit connected with the rectifier circuit in parallel, wherein the rectifier circuit comprises six rectifier diodes; the switching sub-circuit comprises three resistors and an electromagnetic relay, wherein the three resistors comprise two voltage dividing resistors and a load resistor; the switching circuit includes a damping mode and a speed limiting mode. The circuit has no voltage drop at the input end of the electromagnetic relay, and has high control precision; the pull-in voltage of the output end of the electromagnetic relay is larger than the release voltage, the frequent switching of the damper caused by load change can be avoided after the relay is pulled in, and the stability of the circuit is better; the circuit is simplified into one path from the circuit with the same three paths of structures, so that the circuit structure is simpler and the adjustment is more convenient; the circuit adopts two groups of control ends to be connected with the load resistor in parallel, and the circuit switching is more reliable.
Description
Technical Field
The invention belongs to the technical field of aviation, and particularly relates to a damper switching circuit controlled by an electromagnetic relay.
Background
In the current damper switching circuit: three-phase windings in the motor are connected with three input ends of a rectifier, three output ends of the rectifier are connected with a lower-level circuit with the same structure, and when the voltage reaches the conducting voltage of a PNP triode, the switching of the circuit is realized. The defects are that: 1. the PNP triode has voltage drop when switching, and the actual voltage of the switching point is higher than the theoretical voltage; 2. after the circuit is switched, the resistance value of the load resistor is changed, so that the load voltage jumps, and when the voltage is near a switching point, the damper is frequently switched between a damping mode and a speed limiting mode, and the performance of the damper is affected; 3. the circuit with the same three-way structure is used, the occupied space of the PCB is larger, and the wiring is more complex; 4. failure of any PNP transistor can result in failure of the damper.
It is therefore desirable to provide a damper switching circuit that solves the above-described problems.
Disclosure of Invention
The invention aims to solve the problem of defects when PNP triodes are adopted in circuits in the prior art, so as to ensure the reliability and the functional performance of the damper.
In order to achieve the above object, the present invention provides a damper switching circuit controlled by an electromagnetic relay, the switching circuit including a commutator circuit and a switching sub-circuit connected in parallel with the commutator circuit,
The rectifier sub-circuit comprises six rectifier diodes, wherein the six rectifier diodes are equally divided into three rectifier diode groups, the anode of one rectifier diode in each rectifier diode group is connected with the cathode of the other rectifier diode in series, the anode and the cathode of each rectifier diode group are respectively short-circuited, and each phase of a three-phase winding in the damper is respectively connected between two rectifier diodes of each rectifier diode group;
The switching sub-circuit comprises three resistors and an electromagnetic relay, wherein the three resistors comprise two voltage dividing resistors and a load resistor, the three resistors are connected in series and then connected with the rectifier sub-circuit, the input end of the electromagnetic relay is connected in parallel with the two ends of the load resistor and the second voltage dividing resistor, and the control end of the electromagnetic relay is connected in parallel with the two ends of the first voltage dividing resistor and the second voltage dividing resistor;
The switching circuit comprises a damping mode and a speed limiting mode, and under the condition of the damping mode, the load of the switching circuit is the total resistance value after the series connection of the voltage dividing resistor and the load resistor; in the speed limiting mode, the load of the switching circuit is the resistance value of a load resistor.
The damper switching circuit controlled by the electromagnetic relay provided by the invention also has the characteristic that the six rectifier diodes have the same structure.
The damper switching circuit controlled by the electromagnetic relay provided by the invention is also characterized in that the electromagnetic relay is controlled by voltage, and the two voltage dividing resistors are used for adjusting and controlling the control voltage of the electromagnetic relay.
The damper switching circuit controlled by the electromagnetic relay provided by the invention has the characteristic that when the rectified motor voltage does not reach the working threshold of the electromagnetic relay, the armature contact in the electromagnetic relay is disconnected, and the switching circuit is in a damping mode.
The damper switching circuit controlled by the electromagnetic relay provided by the invention has the characteristics that when the rectified motor voltage reaches the working threshold of the electromagnetic relay, the armature contact in the electromagnetic relay is attracted, the two voltage dividing resistors are short-circuited, and the switching circuit is in a speed limiting mode.
The switching circuit of the damper controlled by the electromagnetic relay has the characteristics that after the armature contact is attracted, if the voltage of the motor is reduced to the release voltage of the electromagnetic relay, the armature contact of the electromagnetic relay is disconnected, and the switching circuit is in a damping mode.
The damper switching circuit controlled by the electromagnetic relay provided by the invention also has the characteristic that the release voltage is smaller than the working threshold.
The damper switching circuit controlled by an electromagnetic relay provided by the present invention is also characterized in that the load resistance is determined by the switching circuit load in the speed limit mode.
The damper switching circuit controlled by the electromagnetic relay provided by the invention is further characterized in that the total resistance of the two voltage dividing resistors and the load resistor is determined by damping characteristics, and the resistance of the second voltage dividing resistor and the load resistor is determined by a working threshold.
Compared with the prior art, the invention has the beneficial effects that:
The damper switching circuit controlled by the electromagnetic relay provided by the invention has no voltage drop at the input end of the electromagnetic relay, and has high control precision; the pull-in voltage of the output end of the electromagnetic relay is larger than the release voltage, the frequent switching of the damper caused by load change can be avoided after the relay is pulled in, and the stability of the circuit is better; the circuit is simplified into one path from the circuit with the same three paths of structures, so that the circuit structure is simpler and the adjustment is more convenient; the circuit adopts two groups of control ends to be connected with the load resistor in parallel, and the circuit switching is more reliable.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1: the embodiment of the invention provides a schematic diagram of a damper switching circuit controlled by an electromagnetic relay.
Detailed Description
In order to make the technical means, the creation features, the achievement of the purposes and the effects of the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1, there is provided a damper switching circuit controlled by an electromagnetic relay, the switching circuit including a commutator circuit and a switching sub-circuit connected in parallel with the commutator circuit,
The rectifier sub-circuit comprises six rectifier diodes, wherein the six rectifier diodes are equally divided into three rectifier diode groups, the anode of one rectifier diode in each rectifier diode group is connected with the cathode of the other rectifier diode in series, the anode and the cathode of each rectifier diode group are respectively short-circuited, and each phase of a three-phase winding in the damper is respectively connected between two rectifier diodes of each rectifier diode group; the six rectifier diodes are respectively D1, D2, D3, D4, D5 and D6, wherein the anode of D1 is connected with the anodes of D2 and D3, the cathode of D4 is connected with the cathodes of D5 and D6, the cathode of D1 and the anode of D6 are connected with the motor winding 1, the cathode of D2 and the anode of D5 are connected with the motor winding 2, and the cathode of D3 and the anode of D4 are connected with the motor winding 3.
The switching sub-circuit comprises three resistors and an electromagnetic relay J1, wherein the three resistors comprise two voltage dividing resistors and a load resistor, the three resistors are connected in series and then connected with the rectifier sub-circuit, the input end of the electromagnetic relay J1 is connected in parallel with the two ends of the load resistor and the second voltage dividing resistor, and the control end of the electromagnetic relay J1 is connected in parallel with the two ends of the first voltage dividing resistor and the second voltage dividing resistor; two voltage dividing resistors are R 1 and R 2 respectively, and a load resistor is R 3, wherein one end of R 1 is connected with cathodes of D4, D5 and D6 respectively and 5 pins and 8 pins of a relay J1, the other end of the resistor R 1 is connected with one end of a resistor R 2 respectively and 1 pin of the relay J1, one end of the resistor R 2 is connected with one end of a resistor R 1 respectively and 1 pin of the relay J1, the other end of the resistor R 2 is connected with one end of a resistor R 3 respectively and 4 pins and 7 pins of the relay J1, one end of a resistor R 3 is connected with one end of a resistor R 2 respectively and 4 pins and 7 pins of the relay J1, the other end of a resistor R 3 is connected with 2 pins of the relay J1 respectively and cathodes of D1, D2 and D3 respectively,
The switching circuit comprises a damping mode and a speed limiting mode, and under the condition of the damping mode, the load of the switching circuit is the total resistance value after the series connection of the voltage dividing resistor and the load resistor; in the speed limiting mode, the load of the switching circuit is the resistance value of the load resistor R 3.
In some embodiments, the six rectifying diodes are of the same structure.
In some embodiments, the electromagnetic relay J1 is voltage controlled, and the two voltage dividing resistors are used for adjusting and controlling the control voltage of the electromagnetic relay J1.
In some embodiments, when the rectified motor voltage does not reach the operation threshold of the electromagnetic relay J1, the armature contact in the electromagnetic relay J1 is opened, and the switching circuit is in a damping mode.
In some embodiments, when the rectified motor voltage reaches the operational threshold of the electromagnetic relay, the armature contact in the electromagnetic relay is engaged, the two divider resistors are shorted, and the switching circuit is in a speed limiting mode.
In some embodiments, after the armature contact is closed, if the motor voltage decreases to the release voltage of the electromagnetic relay J1, the armature contact of the electromagnetic relay is opened, and the switching circuit is in the damping mode.
In some embodiments, the release voltage is less than an operating threshold.
In some embodiments, the load resistance R 3 is determined by the switching circuit load in the speed limit mode.
In some embodiments, the total resistance of the two voltage dividing resistors and the load resistor is determined by a damping characteristic, and the resistance of the second voltage dividing resistor R 2 and the load resistor R 3 is determined by a working threshold.
In the embodiment, the internal resistance of the motor is R, the equivalent voltage after rectification of the motor is U, the voltage at two ends of R 1 between the input pin 1 and the input pin 2 of the relay J1 is U 0,
When the equivalent voltage is smaller than the threshold of the switching voltage, the switching circuit is in a damping mode, the armature inside the electromagnetic relay J1 is in a disconnection state in the state, the control terminal 4 pin, the control terminal 5 pin, the control terminal 7 pin and the control terminal 8 pin are in a disconnection state, the control voltages at the two ends of the 1 pin and the 2 pin of the electromagnetic relay J1 are determined by the partial voltage at the two ends of the resistor R 2、R3, the load resistance of the circuit is determined by the series resistance of the resistor R 1、R2、R3,
Then the first time period of the first time period,
When the equivalent voltage reaches the switching voltage threshold, the switching circuit is in a speed limiting mode, under the state, the internal armature of the electromagnetic relay J1 is attracted, the 4 pin and the 5 pin of the control end are conducted, the 7 pin and the 8 pin are conducted, the control voltages at the two ends of the 1 pin and the 2 pin of the electromagnetic relay J1 are determined by the size of a resistor R 3, the resistance value of a circuit load is determined by the resistance value of a resistor R 3,
Then the first time period of the first time period,
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. A damper switching circuit controlled by an electromagnetic relay is characterized in that the switching circuit includes a commutator circuit and a switching sub-circuit connected in parallel with the commutator circuit,
The rectifier sub-circuit comprises six rectifier diodes, wherein the six rectifier diodes are equally divided into three rectifier diode groups, the anode of one rectifier diode in each rectifier diode group is connected with the cathode of the other rectifier diode in series, the anode and the cathode of each rectifier diode group are respectively short-circuited, and each phase of a three-phase winding in the damper is respectively connected between two rectifier diodes of each rectifier diode group;
The switching sub-circuit comprises three resistors and an electromagnetic relay, wherein the three resistors comprise two voltage dividing resistors and a load resistor, the three resistors are connected in series and then connected with the rectifier sub-circuit, the input end of the electromagnetic relay is connected in parallel with the two ends of the load resistor and the second voltage dividing resistor, and the control end of the electromagnetic relay is connected in parallel with the two ends of the first voltage dividing resistor and the second voltage dividing resistor;
The switching circuit comprises a damping mode and a speed limiting mode, and under the condition of the damping mode, the load of the switching circuit is the total resistance value after the series connection of the voltage dividing resistor and the load resistor; in the speed limiting mode, the load of the switching circuit is the resistance value of a load resistor.
2. The damper switching circuit controlled by an electromagnetic relay according to claim 1, wherein the six rectifier diodes are of the same structure.
3. The damper switching circuit controlled by an electromagnetic relay according to claim 1, wherein the electromagnetic relay is voltage-controlled, and the two voltage dividing resistors are used for adjusting a control voltage for controlling the electromagnetic relay.
4. The damper switching circuit controlled by an electromagnetic relay according to claim 1, wherein the armature contact in the electromagnetic relay is opened when the rectified motor voltage does not reach the operational threshold of the electromagnetic relay, the switching circuit being in a damping mode.
5. The damper switching circuit controlled by an electromagnetic relay according to claim 1, wherein when the rectified motor voltage reaches an operation threshold of the electromagnetic relay, armature contacts in the electromagnetic relay are attracted, two voltage dividing resistors are short-circuited, and the switching circuit is in a speed limit mode.
6. The electromagnetic relay controlled damper switching circuit of claim 5 wherein the switching circuit is in the damping mode when the armature contact of the electromagnetic relay opens after the armature contact is energized if the motor voltage drops to the release voltage of the electromagnetic relay.
7. The electromagnetic relay controlled damper switching circuit of claim 6 wherein the release voltage is less than an operating threshold.
8. The damper switching circuit controlled by an electromagnetic relay according to claim 1, wherein the load resistance is determined by a switching circuit load in a speed limit mode.
9. The damper switching circuit controlled by an electromagnetic relay according to claim 8, wherein the total resistance of the two voltage dividing resistors and the load resistor is determined by a damping characteristic, and the resistance of the second voltage dividing resistor and the load resistor is determined by an operation threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111600859.2A CN114301366B (en) | 2021-12-24 | 2021-12-24 | Damper switching circuit controlled by electromagnetic relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111600859.2A CN114301366B (en) | 2021-12-24 | 2021-12-24 | Damper switching circuit controlled by electromagnetic relay |
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| Publication Number | Publication Date |
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| CN114301366A CN114301366A (en) | 2022-04-08 |
| CN114301366B true CN114301366B (en) | 2024-05-31 |
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Citations (5)
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|---|---|---|---|---|
| JPH099497A (en) * | 1995-06-21 | 1997-01-10 | Nec Corp | Power input circuit |
| JP2007174729A (en) * | 2005-12-19 | 2007-07-05 | Yaskawa Electric Corp | Electric motor driver and dynamic brake circuit protecting method |
| CN101322306A (en) * | 2005-12-09 | 2008-12-10 | 特尔马公司 | Method for using an electromagnetic retarder |
| CN210898984U (en) * | 2019-12-30 | 2020-06-30 | 上海英威腾工业技术有限公司 | Soft start and brake circuit, servo motor driver |
| CN112054719A (en) * | 2020-09-27 | 2020-12-08 | 深圳市嘉昱机电有限公司 | Permanent magnet motor phase-locked circuit and permanent magnet motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100488523B1 (en) * | 2003-02-14 | 2005-05-11 | 삼성전자주식회사 | Motor control apparatus and control method thereof |
| EP3197694B1 (en) * | 2014-09-25 | 2022-05-04 | Siemens Industry, Inc. | Systems and methods for damper actuator without microcontroller |
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2021
- 2021-12-24 CN CN202111600859.2A patent/CN114301366B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH099497A (en) * | 1995-06-21 | 1997-01-10 | Nec Corp | Power input circuit |
| CN101322306A (en) * | 2005-12-09 | 2008-12-10 | 特尔马公司 | Method for using an electromagnetic retarder |
| JP2007174729A (en) * | 2005-12-19 | 2007-07-05 | Yaskawa Electric Corp | Electric motor driver and dynamic brake circuit protecting method |
| CN210898984U (en) * | 2019-12-30 | 2020-06-30 | 上海英威腾工业技术有限公司 | Soft start and brake circuit, servo motor driver |
| CN112054719A (en) * | 2020-09-27 | 2020-12-08 | 深圳市嘉昱机电有限公司 | Permanent magnet motor phase-locked circuit and permanent magnet motor |
Non-Patent Citations (1)
| Title |
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| 电磁继电器释放过程特性参数的影响因素及其改善措施;张青森等;机电元件;20040625 * |
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