CN206323316U - A kind of synchronous electric motor rotor field circuit with fault-tolerant operation - Google Patents
A kind of synchronous electric motor rotor field circuit with fault-tolerant operation Download PDFInfo
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- CN206323316U CN206323316U CN201621420163.6U CN201621420163U CN206323316U CN 206323316 U CN206323316 U CN 206323316U CN 201621420163 U CN201621420163 U CN 201621420163U CN 206323316 U CN206323316 U CN 206323316U
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- bridge arm
- igbt
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 26
- 230000005284 excitation Effects 0.000 claims abstract description 29
- 230000002950 deficient Effects 0.000 claims abstract 4
- 230000005611 electricity Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model patent discloses a kind of synchronous electric motor rotor field circuit with fault-tolerant operation.The circuit can be realized：During electric excitation synchronous motor field circuit partial device failure, failure bridge arm is cut off and uses non-faulting bridge arm to maintain normal operation.Rotor-exciting circuit includes two bridge arms, and each bridge arm has the switch that can cut off bridge arm, and the output end of bridge arm is all connected by a switch with the negative pole of dc bus.When detecting rotor-exciting circuit and there is defective device, by switching off for bridge arm where defective device, failure bridge arm is removed, the switch that the output end of failure bridge arm is connected with dc bus negative pole is closed at.By the trigger pulse dutycycle for adjusting non-faulting bridge arm IGBT, it is possible to achieve realize normal excitation using non-faulting bridge arm.
Description
Technical field
The utility model patent is related to a kind of electric excitation synchronous motor field circuit, and the circuit can be in the synchronous electricity of electrical excitation
Motor is maintained normally to run when machine field circuit part of devices breaks down.
Background technology
Synchronous motor extensive application in AC Drive field, according to synchronous electric motor rotor excitation mode not
Together, two kinds of electric excitation synchronous motor and permagnetic synchronous motor can be divided into.Wherein, electric excitation synchronous motor rotor DC excitation magnetic
Field is provided by external power source, and exciting current is adjustable.Electric excitation synchronous motor has that power factor is adjustable, motor working efficiency is high
The features such as.In Large Copacity and high performance Electric Traction occasion, the use of electric excitation synchronous motor is more extensive.
In actual motion, because the power electronic devices in field circuit can produce failure, the synchronous electricity of electrical excitation can be caused
Machine cisco unity malfunction.When electric excitation synchronous motor loses excitation, motor desynchronizing can be caused and can not be run well, when serious
Motor body can also be endangered.Can also risk be caused to the personal safety of operating personnel, it is therefore desirable to design while electrical fault
A kind of field circuit with fault-tolerant operation function.The existing field circuit overwhelming majority is DC chopper circuit, but circuit
In do not consider failure tolerant method, processing can only be shut down when breaking down, therefore reliability is relatively low.
Utility model content
Electric excitation synchronous motor field circuit for not considering failure tolerant, the utility model devises one kind with fault-tolerant
The synchronous utility model rotor field circuit of the electrical excitation of operation.The utility model proposes field circuit mainly for encouraging
In the case that part all-controlling power electronics device (IGBT) is damaged in magnetic circuit, remain to provide to electric excitation synchronous motor rotor
Excitation, maintains motor normally to run.
The technical solution adopted in the utility model is：Deposited after a failure detecting field circuit part of devices, can be by event
Hinder bridge arm excision, and rotor-exciting circuit fault-tolerant operation is maintained with non-faulting bridge arm.As shown in figure 1, rotor-exciting circuit includes
First bridge arm and second bridge arm.In first bridge arm, first all-controlling power electronics device V1With first electricity
Power diode D1Reverse parallel connection, second all-controlling power electronics device V2With second Power Diode Pumped D2Reverse parallel connection, this two
IGBT and first switch S of group anti-parallel diodes1aBridge arm is drawn in the middle of series connection, the IGBT of two groups of anti-paralleled diodes
Output end, and bridge arm output end passes through second switch S1bIt is connected to the negative pole of dc bus.In second bridge arm, the 3rd
All-controlling power electronics device V3With the 3rd Power Diode Pumped D3Reverse parallel connection, the 4th all-controlling power electronics device V4With
4th Power Diode Pumped D4Reverse parallel connection, IGBT and the 3rd switch S of this two groups of anti-parallel diodes2aSeries connection, two groups
Bridge arm output end is drawn in the middle of the IGBT of anti-paralleled diode, and bridge arm output end passes through the 4th switch S2bIt is connected to straight
Flow the negative pole of bus.First bridge arm is connected Exciting Windings for Transverse Differential Protection two ends with the output end of second bridge arm.
The utility model effect：
Under failure operation state, failure bridge arm can be cut off, and operation is maintained using non-faulting bridge arm.The utility model knot
Structure is simple, it is easy to realize, when the power electronic devices in electric excitation synchronous motor field circuit breaks down, can cut off event
Hinder and motor is normally run.
Brief description of the drawings
Fig. 1 is the electric excitation synchronous motor system diagram of the rotor-exciting circuit of the present utility model with fault-tolerant operation function；
Contactor state diagram when Fig. 2 a normally run for field circuit；
Fig. 2 b are equivalent circuit diagram when field circuit is normally run；
Fig. 3 a are field circuit the second bridge arm failure and cut off the on off state figure after failure bridge arm；
Fig. 3 b are field circuit the second bridge arm failure and cut off the equivalent circuit diagram after failure bridge arm.
Embodiment
The utility model concrete methods of realizing is described further below in conjunction with the accompanying drawings.
Fig. 1 is the electric excitation synchronous motor system with fault-tolerant operation rotor-exciting circuit designed using the utility model
Figure.The rotor-exciting circuit of the utility model design is by 4 full-controlled device IGBT (V1、V2、V3、V4), 4 anti-paralleled diodes
(D1、D2、D3、D4), 4 switch (S1a、S1b、S2a、S2b) composition.Wherein：
The DC bus-bar voltage of rotor-exciting circuit of the present utility model with fault-tolerant operation is provided by direct voltage source E,
Field circuit is made up of two bridge arms.In first bridge arm, first all-controlling power electronics device V1With first electric power two
Pole pipe D1Reverse parallel connection, second all-controlling power electronics device V2With second Power Diode Pumped D2Reverse parallel connection, this two groups anti-
IGBT and first switch S of parallel diode1aBridge arm output end is drawn in the middle of series connection, the IGBT of two groups of anti-paralleled diodes
A, and bridge arm output terminals A passes through second switch S1bIt is connected to the negative pole of dc bus.In second bridge arm, the 3rd full control
Type power electronic devices V3With the 3rd Power Diode Pumped D3Reverse parallel connection, the 4th all-controlling power electronics device V4With the 4th
Individual Power Diode Pumped D4Reverse parallel connection, IGBT and the 3rd switch S of this two groups of anti-paralleled diodes2aSeries connection, two groups of inverse parallels
Bridge arm output end B is drawn in the middle of the IGBT of diode, and bridge arm output end B passes through the 4th switch S2bIt is connected to direct current female
The negative pole of line.Electric excitation synchronous motor rotor can take equivalent-simplification as resistance as Rf, inductance value be LfResistance sense load, this practicality
Output port A, B of two new bridge arms are loaded into electric excitation synchronous motor rotor resistance sense load two ends.
When field circuit is normally run, S is switched1a、S2aClosure, switchs S1b、S2bDisconnect.Fig. 2 a are shown under normal operation
Contactor state.Equivalent circuit when Fig. 2 b is normal operations.In normal operation, full-controlled device V1And V4On off state
It is identical, V2And V3On off state it is identical, also, same bridge arm switching tube on off state be in complementary state, i.e. V1V when opening2
State be off state, V1V during shut-off2State be opening state；V3V when opening4State be off state, V3During shut-off
V4State be opening state.According to the value of target output voltage and DC bus-bar voltage, the duty of each switching tube can be obtained
Than.
When a certain switching device failure in field circuit, here with full-controlled device V3Illustrated exemplified by breaking down.
Fig. 3 a show V3After breaking down, V is cut off3Place bridge arm, maintains to run with single bridge arm.Fig. 3 b are equivalent under fault-tolerant operation
Circuit.Work as V3When breaking down, the switch S of non-faulting bridge arm1a、S2bMaintain state during normal operation, V3The failure bridge at place
Switch S in arm2aBe converted to off-state, switch S2bClosure state is converted to, therefore failure bridge arm is removed and failure bridge
The output of arm has terminated to the negative pole of DC bus-bar voltage.Field circuit still structure is can be seen that from the equivalent circuit shown in Fig. 3 b
Into DC chopper circuit.After excision bridge arm, full-controlled device V1And V2On off state still need to meet complementarity condition.According to mesh
The ratio of output voltage and DC bus-bar voltage is marked, the corresponding dutycycle of each switching tube of normal work bridge arm can be obtained.
Summary and induction is：(1) under normal non-fault running status, S is switched1aClosure, S1bDisconnection, S2aClosure, S2bDisconnect；
(2) as the V in first bridge arm1Or V2When breaking down, S is switched1aDisconnection, S1bClosure, S2aClosure, S2bDisconnect；(3) when
V in two bridge arms3Or V4When breaking down, S is switched1aClosure, S1bDisconnection, S2aDisconnection, S2bClosure.Change corresponding full control again
Device V1、V2Or V3、V4Dutycycle be can be achieved normal excitation effect.(4) after failure occurs, the excitation of full bridge structure
Device is changed into half-bridge structure, although the excitation unit of half-bridge structure can not realize bidirectional excitation, but can be in motor control list
In member rotating is realized by changing the direction of rotation of space vector.Therefore after some switching tube of field circuit breaks down, electricity
Excitation magnetic synchronization motor still can realize the function before failure generation.
Claims (2)
1. a kind of synchronous electric motor rotor field circuit with fault-tolerant operation, it is characterised in that：The rotor-exciting circuit includes the
One bridge arm and second bridge arm；In first bridge arm, first all-controlling power electronics device IGBT and first electricity
Power diode inverse parallel, second all-controlling power electronics device IGBT and second Power Diode Pumped inverse parallel, this two groups anti-
The IGBT of parallel diode is connected with first switch, and bridge arm output end is drawn in the middle of the IGBT of two groups of anti-paralleled diodes,
And bridge arm output end switchs the negative pole for being connected to dc bus by second；In second bridge arm, the 3rd full-control type electricity
Power electronic device IGBT and the 3rd Power Diode Pumped reverse parallel connection, the 4th all-controlling power electronics device IGBT and the 4th
Power Diode Pumped reverse parallel connection, the IGBT of this two groups of anti-paralleled diodes connects with the 3rd switch, two groups of anti-paralleled diodes
IGBT in the middle of draw bridge arm output end, and bridge arm output end is switched by the 4th and is connected to the negative pole of dc bus,
The output end of first bridge arm and second bridge arm is powered for electric excitation synchronous motor rotor.
2. a kind of synchronous electric motor rotor field circuit with fault-tolerant operation according to claim 1, it is characterised in that normal
Under running status, first switch closure, second switches off, the 3rd switch closure, and the 4th switches off；Therefore
Hinder under running status, when defective device appears in first bridge arm, first switches off, second switch closure, the 3rd
Switch closure, the 4th switches off；When defective device appears in second bridge arm, first switch closure, second switch
Disconnect and closing, the 3rd switches off, the 4th switch closure；When a certain switching tube breaks down, this circuit can cut off event
Hinder bridge arm where switching tube, adjustment non-faulting bridge arm IGBT trigger pulse dutycycle realizes excitation using non-faulting bridge arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621420163.6U CN206323316U (en) | 2016-12-22 | 2016-12-22 | A kind of synchronous electric motor rotor field circuit with fault-tolerant operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621420163.6U CN206323316U (en) | 2016-12-22 | 2016-12-22 | A kind of synchronous electric motor rotor field circuit with fault-tolerant operation |
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| Publication Number | Publication Date |
|---|---|
| CN206323316U true CN206323316U (en) | 2017-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621420163.6U Expired - Fee Related CN206323316U (en) | 2016-12-22 | 2016-12-22 | A kind of synchronous electric motor rotor field circuit with fault-tolerant operation |
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| CN (1) | CN206323316U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964573A (en) * | 2018-07-17 | 2018-12-07 | 河南森源重工有限公司 | Open winding three-phase electric system and fault-tolerant driving circuit |
| CN111525865A (en) * | 2020-03-31 | 2020-08-11 | 日立电梯（中国）有限公司 | Motor power supply cutting device and elevator system |
| CN111711391A (en) * | 2020-05-27 | 2020-09-25 | 南京国电南自维美德自动化有限公司 | Pulse error processing method for excitation system |
-
2016
- 2016-12-22 CN CN201621420163.6U patent/CN206323316U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964573A (en) * | 2018-07-17 | 2018-12-07 | 河南森源重工有限公司 | Open winding three-phase electric system and fault-tolerant driving circuit |
| CN111525865A (en) * | 2020-03-31 | 2020-08-11 | 日立电梯（中国）有限公司 | Motor power supply cutting device and elevator system |
| CN111525865B (en) * | 2020-03-31 | 2022-04-05 | 日立电梯（中国）有限公司 | Motor power supply cutting device and elevator system |
| CN111711391A (en) * | 2020-05-27 | 2020-09-25 | 南京国电南自维美德自动化有限公司 | Pulse error processing method for excitation system |
| CN111711391B (en) * | 2020-05-27 | 2022-01-28 | 南京国电南自维美德自动化有限公司 | Pulse error processing method for excitation system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20171222 |