CN202034774U - Overvoltage protection device for permanent magnet synchronous motor control failure - Google Patents
Overvoltage protection device for permanent magnet synchronous motor control failure Download PDFInfo
- Publication number
- CN202034774U CN202034774U CN2010206692925U CN201020669292U CN202034774U CN 202034774 U CN202034774 U CN 202034774U CN 2010206692925 U CN2010206692925 U CN 2010206692925U CN 201020669292 U CN201020669292 U CN 201020669292U CN 202034774 U CN202034774 U CN 202034774U
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- China
- Prior art keywords
- brachium pontis
- controller
- synchronous motor
- insulated gate
- bipolar transistor
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Abstract
The utility model relates to the field of charge release devices, specifically to an overvoltage protection device for permanent magnet synchronous motor control failure. The overvoltage protection device comprises a power supply (1), a single-pole double-throw relay (2), a resistor (6) and an insulated gate bipolar transistor (7), and is characterized by also comprising a controller (3), a voltage sensor (4) and a capacitor (5), wherein the voltage sensor (4) and the capacitor (5) are parallelly connected to the two ends of the resistor (6), the insulated gate bipolar transistor (7) is connected to the controller (3) via a lead, three pairs of upper bridge arms and lower bridge arms (71a and 71b, 72a and 72b, and 73a and 73b), which are in series connection, are serially connected to the two ends of the resistor (6), and the single-pole double-throw relay (2) and the voltage sensor (4) are connected to the controller (3) via signal lines. The overvoltage protection device is simple in structure, fast in response, and timely in protection.
Description
Technical field
The utility model relates to and prevents superpotential emergency protective circuit device field, is specially a kind of over-pressure safety device of permagnetic synchronous motor control fails.
Background technology
Because permagnetic synchronous motor more application three-phase pulse width modulated mode (be Pulse Width Modulation, be called for short PWM) realizes sine-wave current control at present.Have back electromotive force to produce during the permagnetic synchronous motor operation, and back electromotive force is also higher under fast state.When system breaks down; electric machine controller can cut out the driving electric bridge; this moment, permagnetic synchronous motor was in generating state; permagnetic synchronous motor will be to the bus feedback of controller to raise busbar voltage; after voltage acquires a certain degree; if protect untimelyly, will cause the badly damaged of controller.At present; the guard method that prevents bus overvoltage mainly is that energy bleeder resistance branch road is installed on bus, when the detection busbar voltage is too high, opens the energy that this branch road discharges the part storage; generally the speed that releases energy by this resistance is slower, still exists the possibility that controller damages.
The utility model content
In order to overcome the defective of prior art, provide a kind of and can be swift in response, protect overvoltage protective device timely, the utility model discloses a kind of over-pressure safety device of permagnetic synchronous motor control fails.
The utility model reaches goal of the invention by following technical solution:
A kind of over-pressure safety device of permagnetic synchronous motor control fails; comprise power supply; the single-pole double throw relay; resistance and insulated gate bipolar transistor; insulated gate bipolar transistor has six phase brachium pontis; there are 3 to go up brachium pontis and 3 following brachium pontis in the six phase brachium pontis; power supply; the one group of tie point and the resistance of single-pole double throw relay are connected into a loop successively with lead; power supply; another group tie point and the insulated gate bipolar transistor of single-pole double throw relay are connected into a loop successively with lead; it is characterized in that: also comprise controller; voltage sensor and electric capacity; voltage sensor and electric capacity all are parallel to the two ends of resistance; 3 last brachium pontis and 3 following brachium pontis of insulated gate bipolar transistor all are wired to controller; the brachium pontis following brachium pontis of all connecting on each; 3 pairs of last brachium pontis of connecting and following brachium pontis all are parallel to the two ends of resistance, and the single-pole double throw relay all is connected controller by holding wire with voltage sensor.
The over-pressure safety device of described permagnetic synchronous motor control fails is characterized in that: controller is selected any one among electromagnetic relay, single-chip microcomputer, single board computer and the PLC for use.
When the utility model uses, three phase connections of permagnetic synchronous motor are wired to the junction of 3 pairs of last brachium pontis of connecting and following brachium pontis respectively, the single-pole double throw relay is located at main line one end that connects in parallel voltage sensor, electric capacity and resistance, and this moment, permagnetic synchronous motor put into operation.
When system's control fails, go up brachium pontis and 3 following brachium pontis meeting Close Alls for 3 of insulated gate bipolar transistor, system keeps inertia motion, and permagnetic synchronous motor is in generating state, and system's kinetic energy changes into electrical power storage:
(1) in the formula, Ek is system's kinetic energy, and η is an efficient, and E0 is system's electric energy stored before the control fails, and E1 is system's electric energy stored after the control fails.The conversion of this energy will make the voltage pump liter of controller bus.
When system breaks down control fails, if voltage sensor records the voltage of insulated gate bipolar transistor greater than a preset value, then controller sends control signal and makes the single-pole double throw relay connect an end of controller, controller control insulated gate bipolar transistor is with 3 following brachium pontis closures, and equivalence becomes the permagnetic synchronous motor three-phase shortcircuit.The stator voltage equation of the permagnetic synchronous motor after the simplification is:
Here only analyze the steady-state process after the motor short circuit, at this moment: ud=uq=0, substitution (2) formula solves:
According to (3) formula analysis, have the current component on d axle and the q axle behind the permagnetic synchronous motor three-phase shortcircuit in the circuit, the kinetic energy of system changes into heat energy and is consumed, thereby prevents the bus overvoltage of controller, current component on the q axle produces braking moment, makes system's reduction of speed.
The utility model can carry out overvoltage protection, the further rising of restriction controller busbar voltage during control fails fast under the permagnetic synchronous motor fast state.The overvoltage protection action can realize by the hardware detection mode, also can realize by software detection bus overvoltage mode, can obviously not increase system cost.The beneficial effects of the utility model are: simple in structure, be swift in response, and protection is in time.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Structural representation when Fig. 2 is the utility model use.
Embodiment
Below further specify the utility model by specific embodiment.
Embodiment 1
A kind of over-pressure safety device of permagnetic synchronous motor control fails; comprise power supply 1; single-pole double throw relay 2; controller 3; voltage sensor 4; electric capacity 5; resistance 6 and insulated gate bipolar transistor 7; as shown in Figure 1; concrete structure is: insulated gate bipolar transistor 7 has six phase brachium pontis; there are 3 to go up brachium pontis 71a in the six phase brachium pontis; 72a and 73a and 3 following brachium pontis 71b; 72b and 73b; power supply 1; the one group of tie point and the resistance 6 usefulness leads of single-pole double throw relay 2 are connected into a loop successively; power supply 1; another group tie point and the insulated gate bipolar transistor 7 usefulness leads of single-pole double throw relay 2 are connected into a loop successively; voltage sensor 4 and electric capacity 5 all are parallel to the two ends of resistance 6; go up brachium pontis 71a for 3 of insulated gate bipolar transistor 7; 72a and 73a and 3 following brachium pontis 71b; 72b and 73b are wired to controller 3; brachium pontis 71a on each; 72a and the 73a following brachium pontis 71b that all connects; 72b and 73b; the 3 pairs of last brachium pontis of connecting and following brachium pontis 71a and 71b; 72a and 72b; 73a and 73b are parallel to the two ends of resistance 6, and single-pole double throw relay 2 all is connected controller 3 by holding wire with voltage sensor 4.Controller 3 is selected any one among electromagnetic relay, single-chip microcomputer, single board computer and the PLC for use, and present embodiment is selected single-chip microcomputer for use.
When present embodiment uses, as shown in Figure 2, three phase connections of permagnetic synchronous motor 8 are wired to the junction of 3 couples of last brachium pontis 71a that connecting, 72a, 73a and following brachium pontis 71b, 72b, 73b respectively, single-pole double throw relay 2 is located at main line one end that connects in parallel voltage sensor 4, electric capacity 5 and resistance 6, and this moment, permagnetic synchronous motor 8 put into operation.
When system breaks down control fails, if voltage sensor 4 records the voltage of insulated gate bipolar transistor 7 greater than a preset value, then controller 3 sends control signal and makes single-pole double throw relay 2 connect an end of controllers 3, controller 3 control insulated gate bipolar transistors 7 are with 3 following brachium pontis 71b, 72b, 73b closure, equivalence becomes permagnetic synchronous motor 8 three-phase shortcircuits, the kinetic energy of system changes into heat energy and is consumed, thereby prevent the bus overvoltage of controller 3, and the generation braking moment, make system's reduction of speed.
Claims (2)
1. the over-pressure safety device of a permagnetic synchronous motor control fails; comprise power supply (1); single-pole double throw relay (2); resistance (6) and insulated gate bipolar transistor (7); insulated gate bipolar transistor (7) has six phase brachium pontis; there are 3 to go up brachium pontis (71a in the six phase brachium pontis; 72a and 73a) and 3 following brachium pontis (71b; 72b and 73b); power supply (1); the one group of tie point and the resistance (6) of single-pole double throw relay (2) are connected into a loop successively with lead; power supply (1); another group tie point and the insulated gate bipolar transistor (7) of single-pole double throw relay (2) are connected into a loop successively with lead; it is characterized in that: also comprise controller (3); voltage sensor (4) and electric capacity (5); voltage sensor (4) and electric capacity (5) all are parallel to the two ends of resistance (6); go up brachium pontis (71a for 3 of insulated gate bipolar transistor (7); 72a and 73a) and 3 following brachium pontis (71b; 72b and 73b) all be wired to controller (3); brachium pontis (71a on each; 72a and 73a) a following brachium pontis (71b all connects; 72b and 73b); 3 pairs of last brachium pontis of connecting and following brachium pontis (71a and 71b; 72a and 72b; 73a and 73b) all be parallel to the two ends of resistance (6), single-pole double throw relay (2) all is connected controller (3) by holding wire with voltage sensor (4).
2. the over-pressure safety device of permagnetic synchronous motor control fails as claimed in claim 1 is characterized in that: controller (3) is selected any one among electromagnetic relay, single-chip microcomputer, single board computer and the PLC for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206692925U CN202034774U (en) | 2010-12-20 | 2010-12-20 | Overvoltage protection device for permanent magnet synchronous motor control failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206692925U CN202034774U (en) | 2010-12-20 | 2010-12-20 | Overvoltage protection device for permanent magnet synchronous motor control failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034774U true CN202034774U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206692925U Expired - Fee Related CN202034774U (en) | 2010-12-20 | 2010-12-20 | Overvoltage protection device for permanent magnet synchronous motor control failure |
Country Status (1)
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| CN (1) | CN202034774U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983796A (en) * | 2012-08-06 | 2013-03-20 | 联合汽车电子有限公司 | Permanent magnet synchronous motor anti-demagnetization control method |
| CN104410337A (en) * | 2014-11-26 | 2015-03-11 | 联合汽车电子有限公司 | Driving system of high-voltage permanent magnet synchronous motor |
| CN105320196A (en) * | 2014-06-16 | 2016-02-10 | 香港城市大学 | Current control apparatus |
| CN105406781A (en) * | 2015-12-07 | 2016-03-16 | 合肥巨一动力系统有限公司 | Permanent magnet synchronous motor power transmission circuit with battery protection function and battery protection control method thereof |
-
2010
- 2010-12-20 CN CN2010206692925U patent/CN202034774U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983796A (en) * | 2012-08-06 | 2013-03-20 | 联合汽车电子有限公司 | Permanent magnet synchronous motor anti-demagnetization control method |
| CN105320196A (en) * | 2014-06-16 | 2016-02-10 | 香港城市大学 | Current control apparatus |
| CN104410337A (en) * | 2014-11-26 | 2015-03-11 | 联合汽车电子有限公司 | Driving system of high-voltage permanent magnet synchronous motor |
| CN104410337B (en) * | 2014-11-26 | 2017-11-03 | 联合汽车电子有限公司 | High-voltage permanent magnet synchronous motor driven systems |
| CN105406781A (en) * | 2015-12-07 | 2016-03-16 | 合肥巨一动力系统有限公司 | Permanent magnet synchronous motor power transmission circuit with battery protection function and battery protection control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20181220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |