CN102290789A - Failure preventing device for electric-redundancy brushless direct current motor - Google Patents
Failure preventing device for electric-redundancy brushless direct current motor Download PDFInfo
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- CN102290789A CN102290789A CN2011102314527A CN201110231452A CN102290789A CN 102290789 A CN102290789 A CN 102290789A CN 2011102314527 A CN2011102314527 A CN 2011102314527A CN 201110231452 A CN201110231452 A CN 201110231452A CN 102290789 A CN102290789 A CN 102290789A
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Abstract
The invention discloses a failure preventing device for an electric-redundancy brushless direct current motor and belongs to the technical field of motors. The device for the electric-redundancy brushless direct current motor comprises the electric-redundancy brushless direct current motor, an inverter, a current detection circuit, a control unit and a failure protection executing unit, wherein in the electric-redundancy brushless direct current motor, two or more sets of windings are embedded into a stator slot of a motor to form electric redundancies; different electric redundancies are independent of one another and form star-like connecting windings through a relay respectively; the failure protection executing unit consists of the relay and a driving circuit thereof; and the current detection circuit is used for monitoring the phase current of each electric redundancy. When one redundant winding of the motor is in short circuit, the control unit gives a command to the failure protection executing unit according to a signal provided by the current detection circuit to cut off the connection of the failed redundant winding, so that the influence of the failed redundancy on a normal redundancy can be effectively reduced.
Description
Technical field
The present invention relates to a kind of electric redundance brshless DC motor failure protecting device, can be used as the error protection of high reliability, high fault tolerance system drive motor, belong to technical field of motors.
Background technology
The redundance brshless DC motor is a kind of motor indispensable in Aero-Space, armament systems and the civilian highly-reliable system, wherein, the control of two remainings/redundance and be correlated with fault-toleranr technique successful Application in the actuating system in sophisticated technology fields such as developed country's manned space flight, unmanned plane, fire control radar, improved the reliability and the fault-tolerance of related system greatly.
The implementation of redundance brshless DC motor mainly contains two kinds at present: electric redundance and mechanical integrated formula redundance, electric redundance promptly embeds two covers or the above winding of two covers in a motor stator, and mechanical integrated formula redundance to be multiple electric motors pass through that gear pair comprehensively is one.There is the gap inevitably in the gear pair of mechanical integrated formula redundance motor, thereby causes controlling stagnant ring, dead band, low-frequency oscillation problem, so be restricted in the application of high accuracy, high reliability occasion.Moreover there is " power dispute " problem in mechanical integrated formula redundance motor, i.e. the oscillation problem that causes of multiple motors moment moment direction inconsistency.In addition, there is the low problem of power density in mechanical integrated formula redundance motor, is difficult to satisfy Aeronautics and Astronautics etc. to the demanding application of product power density.Yet, there is strong electromagnetic field couples between a plurality of remainings of electric redundance brshless DC motor, so in case certain remaining generation winding failure, particularly short trouble, also will produce very high induced electromotive force in the winding of other remainings, thereby cause winding insulation to puncture; In addition, the operation of the normal remaining of the same influence of heat that the too high electric current of short-circuited winding produces, even the insulation of burning intact winding.Therefore electric redundance motor is more limited to the fault-tolerant ability of winding failure.
Summary of the invention
The problem that the present invention exists when being primarily aimed at electric redundance brshless DC motor winding failure; overcome its weak point, a kind of winding failure protective device of high reliability is provided with the electric redundance brshless DC motor of high power density for high reliability, high-precision servo control.
The present invention relates to a kind of electric redundance brshless DC motor failure protecting device, comprise electric redundance brshless DC motor, inverter, current detection circuit, control unit and error protection performance element.Wherein electric redundance brshless DC motor promptly embeds two covers or overlaps winding more in a motor stator slot, form electric redundance; Independent mutually between the different electric remainings, constitute the Y-connection winding by relay respectively, and independently-powered by the inverter of correspondence; Current detection circuit is used to monitor each electric remaining phase current, and monitoring result is sent to control unit; The error protection performance element is made up of relay and drive circuit thereof, and this unit receives the instruction that control unit sends, and connects according to the winding of the commands for controlling respective electric remaining of control unit.The signal that control unit provided according to current detection circuit when remaining winding of motor was short-circuited fault, the error protection performance element is sent instruction open failure remaining winding connect.
The present invention can effectively reduce the influence of fault remaining to normal remaining.
Description of drawings:
Fig. 1 is an overall structure block diagram of the present invention;
Fig. 2 is the catenation principle figure of first remaining of the present invention and error protection performance element;
Fig. 3 is the catenation principle figure of second remaining of the present invention and error protection performance element;
Concrete label is as follows among the figure:
1. electric pair of margin brushless DC motor
2. error protection performance element
3. control unit
4. current detection circuit
5.6. inverter
7. two first remainings of margin brushless DC motor (remaining 1)
8. second remaining of two margin brushless DC motors (remaining 2)
9. remaining 1 error protection performance element
10. remaining 2 error protection performance elements
11.12. relay drive circuit
13.14. relay
15.16.17.18.19.20.21.22. relay contact
The exit of A1, B1, C1--remaining 1
The exit of A2, B2, C2--remaining 2
The Y type link of X1, Y1, Z1--remaining 1
The Y type link of X2, Y2, Z2--remaining 2
VCC. drive circuit power supply
GND. power supply ground
Q1.Q2. switching tube
Q1_B. switching tube Q1 base stage
Q1_C. switching tube Q1 collector electrode
Q1_E. switching tube Q1 emitter-base bandgap grading
Q2_B. switching tube Q2 base stage
Q2_C. switching tube Q2 collector electrode
Q2_E. switching tube Q2 emitter-base bandgap grading
J1_in.J2_in. relay input
Embodiment:
The electric redundance brshless DC motor of the present invention failure protecting device is identical with two margin brushless DC electric motor protective devices; be that example is done detailed description now with electric pair of margin brushless DC motor; brushless dc protector more than two remainings is identical with it, repeats no more.
Its better embodiment comprises one electric pair of margin brushless DC motor 1, an error protection performance element 2, a control unit 3, a current detection circuit 4, inverter 5,6.Wherein, described electric pair of margin brushless DC motor 1 comprises first electric remaining 7 and second electric remaining 8.Wherein, A2, the B2 of the A1 of first electric remaining 7, B1, C1 and second electric remaining 8, C2 be respectively as the leading-out terminal of electric remaining 7 and electric remaining 8, and then be connected with the output of inverter three-phase; The X1 of first electric remaining 7, Y1, Z1 are connected with the contact 15,16,17,18 of relay 13 respectively by shown in Figure 2, and the X2 of second electric remaining 8, Y2, Z2 are connected with the contact 19,20,21,22 of relay 14 respectively by shown in Figure 3.
In the better embodiment of the present invention, described error protection performance element also comprises relay 13,14 and corresponding relay drive circuit 11,12.Described relay 13,14 comprises four contacts and a coil respectively, and wherein J1_in is that coil input end, the J2_in of relay 13 are the coil input end of relay 14.
Described relay drive circuit 11 (12) comprises a resistance R 1 (R2), a switching tube Q1 (Q2) respectively.Wherein, the collector electrode Q1_C (Q2_C) of switching tube Q1 (Q2) is by being connected with the coil input end J1_in (J2_in) of relay 13 (14) shown in Fig. 2 (Fig. 3); Switching tube Q1 is connected with the I/O mouth of control unit 3 respectively with base stage Q1_B, the Q2_B of Q2; Emitter-base bandgap grading Q1_E, the Q2_E of switching tube Q1 and Q2 then distinguishes ground connection GND.
During described pair of margin brushless DC motor 1 normal the operation, control unit 3 does not send the error protection instruction, and switching tube Q1 and Q2 base stage Q1_B, Q2_B are low level, and collector electrode Q1_C, Q2_C are high level, and relay 13,14 contacts all are in closure state.Winding failure takes place in described pair of margin brushless DC motor 1 first remaining 7; particularly during short trouble; the phase current data that control unit 3 monitors according to current detection circuit 4, send error protection instruction; make the base stage Q1_B of switching tube Q1 become high level; and then switching tube Q1 collector electrode Q1_C becomes low level; the contact 15,16,17,18 of relay 13 disconnects; the three-phase star winding of electric remaining 7 disconnects; stoped the further deterioration of winding failure, avoided the electric remaining 7 of fault owing to the influence of close coupling to normal electric remaining 8.
Claims (1)
1. electric redundance brshless DC motor failure protecting device, it is characterized in that: this scheme comprises electric redundance brshless DC motor, inverter, current detection circuit, control unit and error protection performance element;
Wherein electric redundance brshless DC motor promptly embeds the winding more than two covers in a motor stator slot, form electric redundance; Independent mutually between the different electric remainings, constitute the Y-connection winding by relay respectively, and independently-powered by the inverter of correspondence; Current detection circuit is used to monitor each electric remaining phase current, and monitoring result is sent to control unit; The error protection performance element is made up of relay and drive circuit thereof, and this unit receives the instruction that control unit sends, and connects according to the winding of the commands for controlling respective electric remaining of control unit; The signal that control unit provided according to current detection circuit when remaining winding of motor was short-circuited fault, the error protection performance element is sent instruction open failure remaining winding connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102314527A CN102290789A (en) | 2011-08-12 | 2011-08-12 | Failure preventing device for electric-redundancy brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102314527A CN102290789A (en) | 2011-08-12 | 2011-08-12 | Failure preventing device for electric-redundancy brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102290789A true CN102290789A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102314527A Pending CN102290789A (en) | 2011-08-12 | 2011-08-12 | Failure preventing device for electric-redundancy brushless direct current motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594077A (en) * | 2012-03-21 | 2012-07-18 | 西北工业大学 | Low-coupling dual-redundancy permanent-magnet brushless DC motor |
| CN103414430A (en) * | 2013-08-09 | 2013-11-27 | 北京控制工程研究所 | Method for reducing main backup magnetic coupling of solar panel driving circuit |
| WO2016115684A1 (en) * | 2015-01-20 | 2016-07-28 | Techtronic Industries Company Limited | Dual-voltage brushless motor |
| CN106301108A (en) * | 2016-08-30 | 2017-01-04 | 宁波贝德尔电讯电机有限公司 | The motor of a kind of fan band rectification function drives plate |
| WO2018053693A1 (en) * | 2016-09-20 | 2018-03-29 | 深圳市大疆创新科技有限公司 | Motor control system and unmanned aircraft |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172258U (en) * | 2011-08-12 | 2012-03-21 | 北京工业大学 | Fault protection device for electrical redundancy brushless direct current motor |
-
2011
- 2011-08-12 CN CN2011102314527A patent/CN102290789A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172258U (en) * | 2011-08-12 | 2012-03-21 | 北京工业大学 | Fault protection device for electrical redundancy brushless direct current motor |
Non-Patent Citations (1)
| Title |
|---|
| 韩彬,齐蓉: "双余度电机伺服***过流保护研究", 《微电机》, vol. 41, no. 5, 31 December 2008 (2008-12-31) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594077A (en) * | 2012-03-21 | 2012-07-18 | 西北工业大学 | Low-coupling dual-redundancy permanent-magnet brushless DC motor |
| CN103414430A (en) * | 2013-08-09 | 2013-11-27 | 北京控制工程研究所 | Method for reducing main backup magnetic coupling of solar panel driving circuit |
| CN103414430B (en) * | 2013-08-09 | 2015-07-08 | 北京控制工程研究所 | Method for reducing main backup magnetic coupling of solar panel driving circuit |
| WO2016115684A1 (en) * | 2015-01-20 | 2016-07-28 | Techtronic Industries Company Limited | Dual-voltage brushless motor |
| US10367435B2 (en) | 2015-01-20 | 2019-07-30 | Techtronic Industries Company Limited | Dual-voltage brushless motor |
| CN106301108A (en) * | 2016-08-30 | 2017-01-04 | 宁波贝德尔电讯电机有限公司 | The motor of a kind of fan band rectification function drives plate |
| WO2018053693A1 (en) * | 2016-09-20 | 2018-03-29 | 深圳市大疆创新科技有限公司 | Motor control system and unmanned aircraft |
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Application publication date: 20111221 |