CN106357144A - Fault diagnosis and fault-tolerant control method of inverters in open-winding motor driving system of double-inverter topological structure - Google Patents
Fault diagnosis and fault-tolerant control method of inverters in open-winding motor driving system of double-inverter topological structure Download PDFInfo
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- CN106357144A CN106357144A CN201610818479.9A CN201610818479A CN106357144A CN 106357144 A CN106357144 A CN 106357144A CN 201610818479 A CN201610818479 A CN 201610818479A CN 106357144 A CN106357144 A CN 106357144A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to a fault diagnosis and fault-tolerant control method of inverters in an open-winding motor driving system. The method includes that a neutral point of a common triphase motor winding is detached, and two nominal two-level inverters are cascaded at two ends of the neutral point and powered by double power sources; when any bridge arm switch device of the two inverters is short out due to overvoltage breakdown or in harsh working condition, and short-out current flows through a detection resistor to send out an overcurrent protection signal; a controller quickly processes this error reporting signal, positions the inverters, immediately turns off an electromagnetic relay and cuts off the power source of the inverter with fault phase to maintain stable torque output so as to realize fault-tolerant running of a driving device. When the switch devices are in an open circuit, section time of corresponding phase sequence becomes small, a fault position is locked through software detection, and running can be performed according to a short-out fault-tolerant mode.
Description
Technical field
The invention belongs to permagnetic synchronous motor control technology field, more particularly to open inversion in winding electric machine drive system
Device fault diagnosis and fault-tolerant control runs.
Background technology
In recent years, winding Successful utilization opened in the high-power drive such as space flight, electric automobile based on twin inverter topological structure
In dynamic system, this is switched resistance to mainly due to DC voltage utilization rate can effectively improve by twin inverter topological structure
Pressure grade does not need to increase, and under relatively low switching frequency, output harmonic wave content is less, and the control strategy after optimization can eliminate altogether
The harm to electronic devices and components of mode voltage, zero-sequence current, obtains three more excellent level by common two-level inverter cascade
Control, efficiently solve the problems, such as electromagnetic interference in motor driven systems.But switching component quantity increased one times, and inverse
Become device breaker in middle components and parts fault and occupy significant portion in motor driven systems, can therefore whole drive system reliability service
There is very big relation with the stability of twin inverter topological structure and reliability, so to twin inverter topological structure faults-tolerant control
Run necessary.
Existing document based on twin inverter topological structure open winding drive system fault detect and fault-tolerant operation is main
For the fault-tolerance study of switching tube components and parts open fault, single bridgc arm short fault, open-phase fault etc., after fault occurs through
Substantial amounts of full control or in midair components and parts carry out circuit hardware topological structure reconstruct, are in and compare real-time excision event under bad working environments
Barrier hardly results in guarantee.
Content of the invention
Goal of the invention: for the low problem of above-mentioned control complexity real-time, the purpose of the present invention is opening winding electric machine driving
In system fault of converter diagnosis with faults-tolerant control operation in propose a kind of simple and convenient quickly real-time based on electromagnetic relay
Property excision short trouble it is ensured that open winding electric machine fault-tolerant after be capable of the method for stable operation.By sector time change locking event
Barrier phase brachium pontis, checks whether to be Single switch components and parts fault it is ensured that the susceptiveness of protection according to t1, t2 change simultaneously again.
Technical scheme: for achieving the above object, what the present invention proposed a kind of twin inverter topological structure opens winding
In motor driven systems fault of converter diagnosis and fault tolerant control method, the method by twin inverter topological structure open winding electricity
Fault of converter diagnosis and faults-tolerant control circuit realiration in machine drive system, this circuit includes primary electromagnetic relay and primary mistake
Stream detection resistance, and secondary electromagnetic relay and secondary over-current detection resistance；Primary electromagnetic relay includes first and normally opened opens
Pass, the second normal open switch, the 3rd normal open switch and the first normally closed switch, the first normal open switch of primary electromagnetic relay and primary
Direct voltage source is in parallel, primary over-current detection resistant series between primary electrical potential source and primary electric capacity, the first normally closed switch string
It is associated between primary electric capacity and primary inverter, one end of the second normal open switch connects primary direct current potential source and primary electric capacity
Common port, the other end of the second normal open switch connects the common port of secondary direct voltage and secondary capacitance, the 3rd normal open switch
One end connects the common port of primary over-current detection resistance and primary electric capacity, and the other end of the 3rd normal open switch connects secondary excessively stream inspection
Measuring resistance and the common port of secondary capacitance；Secondary electromagnetic relay includes the 4th normal open switch, the 5th normal open switch, the 6th normally opened
Switch and the second normally closed switch, secondary electromagnetic relay the 4th normal open switch is in parallel with secondary direct voltage source, secondary excessively stream inspection
Measuring resistance is connected between secondary electrical potential source and secondary capacitance, the second normally closed switch be connected on secondary capacitance and secondary inverter it
Between, one end of the 5th normal open switch connects the common port of primary direct current potential source and primary electric capacity, the 5th normal open switch another
End connects the common port of secondary direct voltage source and secondary capacitance, and one end of the 6th normal open switch connects primary over-current detection resistance
With the common port of primary electric capacity, the other end of the 6th normal open switch connects the public of secondary over-current detection resistance and secondary capacitance
End；After motor fault-tolerant runs, the normally closed switch of electromagnetic relay or electromagnetic relay disconnects, and non-faulty inverter is excised, normally opened closes
Close and two power sources in parallel are run.
Further, the concrete steps of short trouble overcurrent protection fault-tolerant operation include:
(1) detect the curtage of primary over-current detection resistance and secondary over-current detection resistance, if the electricity detecting
Stream or voltage are more than set-point, send overcurrent protection signal；
(2) controller responds rapidly to action electromagnetic relay, and the first normally closed switch is disconnected, the first normal open switch closure,
Diode common cathode on the first inverter switching device components and parts for the inverse parallel and common-anode are shorted together, second is normally opened simultaneously
Switch and the 3rd normal open switch closure, primary direct current potential source are parallel to secondary direct voltage source and work on；Or by
Two normally closed switch disconnect, and the 4th normal open switch closure, by diode common cathode on the second inverter switching device components and parts for the inverse parallel
Pole and common-anode are shorted together, and the 5th normal open switch and the 6th normal open switch closure, in parallel by secondary direct voltage source simultaneously
Work on to primary direct current potential source.
Further, the fault of converter diagnosis after switching device open circuit occurs include with the step of failure tolerant operation:
(1) detection voltage vector effect under two neighboring vector t1 and t2 action time, by t1 and t2 detecting with
Set-point compares, if t1 the and t2 time is more than set-point, judges to break down；
(2) according to the sector number failure judgement phase that abnormal t1 and t2 place sector occurs；
(3) inverter that the sequencing judgement of the appearance according to abnormal t1 and t2 is broken down, if t1 is formerly,
T2 rear, then judges that primary inverter breaks down；If t2 is formerly, t1 rear, judges that secondary inverter breaks down；
(4) controller responds rapidly to action electromagnetic relay, if primary inverter breaks down, first normally closed is opened
Close and disconnect, the first normal open switch closure, by diode common cathode on the first inverter switching device components and parts for the inverse parallel and common anode
Extremely short be connected together, the second normal open switch and the 3rd normal open switch closure, primary direct current potential source are parallel to secondary straight simultaneously
Stream voltage source works on；If secondary inverter breaks down, the second normally closed switch is disconnected, the 4th normal open switch closes
Close, diode common cathode on the second inverter switching device components and parts for the inverse parallel and common-anode are shorted together, simultaneously the 5th
Normal open switch and the 6th normal open switch closure, secondary direct voltage source are parallel to primary direct current potential source and work on.
Beneficial effect: the fault-tolerant operation method of the present invention is to be based on to open fault of converter diagnosis in winding electric machine drive system
The quick and convenient switched system method of operation is it is ensured that also can keep motor stabilizing torque output continuous service under operating mode complexity afterwards.
According to the different fault type of switching tube, for short trouble quick excision fault, and Single switch pipe components and parts open circuit fault, root
Change and corresponding sector number according to sector time lock sector, improve the reliability of system.Compared to existing fault-tolerant side
Case, the program control fault before and after circuit topology more simple and reliable it is not necessary to the control logic of complexity, practical, be easy to push away
Extensively.
Brief description
Fig. 1 opens winding electric machine drive system topology structural representation for the present invention.
Fig. 2 is that the present invention primary inverter System Fault Tolerance operation schematic diagram when irreversible failure removal.
Fig. 3 is brachium pontis a phase switching tube open circuit corresponding sector distribution schematic diagram on present invention primary inverter.
Fig. 4 is the corresponding t1 and t2 schematic diagram of brachium pontis a phase switching tube open circuit on present invention primary inverter.
Fig. 5 is brachium pontis b phase switching tube open circuit corresponding sector distribution schematic diagram on secondary inverter of the present invention.
Fig. 6 is the corresponding t1 and t2 schematic diagram of brachium pontis b phase switching tube open circuit on secondary inverter of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
A kind of twin inverter topological structure as shown in Figure 1 open in winding electric machine drive system fault of converter diagnosis with
Fault tolerant control method, the method is diagnosed and appearance by the fault of converter in winding electric machine drive system of opening of twin inverter topological structure
Wrong control circuit is realized, and this circuit includes primary electromagnetic relay 7 and primary over-current detection resistance 9, and secondary electromagnetism relay
Device 8 and secondary over-current detection resistance 10；Primary electromagnetic relay 7 include the first normal open switch 7-1, the second normal open switch 7-2,
Three normal open switch 7-3 and the first normally closed switch 7-4, the first normal open switch 7-1 of primary electromagnetic relay 7 and primary direct current pressure
Source 5 is in parallel, and primary over-current detection resistance 9 is connected between primary electrical potential source 5 and primary electric capacity 3, the first normally closed switch 7-4 series connection
Between primary electric capacity 3 and primary inverter 1, one end of the second normal open switch 7-2 connects primary direct current potential source 5 and primary electrical
Hold 3 common port, the other end of the second normal open switch 7-2 connects the common port of secondary direct voltage source 6 and secondary capacitance 4, the
One end of three normal open switch 7-3 connects the common port of primary over-current detection resistance 9 and primary electric capacity 3, the 3rd normal open switch 7-3's
The other end connects the common port of secondary over-current detection resistance 10 and secondary capacitance 4；Secondary electromagnetic relay 8 includes the 4th and normally opened opens
Close 8-1, the 5th normal open switch 8-2, the 6th normal open switch 8-3 and the second normally closed switch 8-4, secondary electromagnetic relay 8 the 4th is normal
8-1 is in parallel with secondary direct voltage source 6 for switch, and secondary over-current detection resistance 10 is connected on secondary electrical potential source 6 and secondary capacitance 4
Between, the second normally closed switch 8-4 is connected between secondary capacitance 4 and secondary inverter 2, and one end of the 5th normal open switch 8-2 is even
Connect the common port of primary direct current potential source 5 and primary electric capacity 3, the other end of the 5th normal open switch 8-2 connects secondary direct voltage
Source 6 and the common port of secondary capacitance 4, one end of the 6th normal open switch 8-3 connects primary over-current detection resistance 9 and primary electric capacity 3
Common port, the other end of the 6th normal open switch 8-3 connects the common port of secondary over-current detection resistance 10 and secondary capacitance 4；Electricity
After machine fault-tolerant operation, the normally closed switch of electromagnetic relay 7 or electromagnetic relay 8 disconnects, and non-faulty inverter is excised, normally opened closure
Two power sources in parallel are run.
Fig. 2 be primary inverter be short-circuited fault when circuit structure diagram, the primary over-current detection resistance 9 of detection and secondary
The curtage of over-current detection resistance 10, if the curtage detecting is more than set-point, sends overcurrent protection signal；
Controller responds rapidly to action electromagnetic relay, and the first normally closed switch 7-4 is disconnected, the first normal open switch 7-1 closure, will instead simultaneously
The diode common cathode being associated on the first inverter switching device components and parts and common-anode are shorted together, simultaneously the second normal open switch 7-
2 and the 3rd normal open switch 7-3 closure, primary direct current potential source 5 is parallel to secondary direct voltage source 6 and works on.
The step run with failure tolerant of fault diagnosis that inverter occurs during switching device open circuit includes: detection voltage is sweared
Under amount effect, t1 and t2 action time of two neighboring vector, t1 and t2 detecting is compared with set-point, if t1 and t2
Time is more than set-point, judges to break down；According to the sector number failure judgement phase that abnormal t1 and t2 place sector occurs；Root
According to the sequencing inverter that breaks down of judgement of the appearance of abnormal t1 and t2, if t1 is formerly, t2 rear, then judges
Primary inverter breaks down；If t2 is formerly, t1 rear, judges that secondary inverter breaks down；Controller responds rapidly to
Action electromagnetic relay, if primary inverter breaks down, the first normally closed switch 7-4 is disconnected, the first normal open switch 7-1
Closure, diode common cathode on the first inverter switching device components and parts for the inverse parallel and common-anode are shorted together, and simultaneously the
Two normal open switch 7-2 and the 3rd normal open switch 7-3 closure, primary direct current potential source 5 is parallel to secondary direct voltage source 6 and continues
Work；If secondary inverter breaks down, the second normally closed switch 8-4 is disconnected, the 4th normal open switch 8-1 closure, will be anti-
The diode common cathode being connected in parallel on the second inverter switching device components and parts and common-anode are shorted together, the 5th normal open switch simultaneously
8-2 and the 6th normal open switch 8-3 closure, secondary direct voltage source 6 is parallel to primary direct current potential source 5 and works on.
Hereinafter, we test to the present embodiment, the ginseng driving winding composite excitation permanent magnet synchronous motor being adopted
Count as shown in Table 1:
Winding composite excitation permanent magnet parameter of synchronous machine opened by table one
| Number of pole-pairs | Stator resistance | Main flux | Exciting Windings for Transverse Differential Protection self-induction | Exciting Windings for Transverse Differential Protection resistance | Rotary inertia |
| 4 | 2.7ω | 0.11348wb | 0.57h | 33ω | 0.00343kg·m2 |
| D-axis inductance | Quadrature axis inductance | Rated output power | Rated speed | Nominal torque | Specified phase current virtual value |
| 24.1mh | 14.9mh | 750w | 1500rpm | 4.8nm | 5a |
Fig. 3-Fig. 6 is to drive winding composite excitation permanent magnet synchronous motor and reach in 0.12s to stablize relief primary inverter a phase
On winding, brachium pontis disconnects and secondary inverter b phase winding disconnects obtained sector schematic diagram and corresponding t1 and t2 schematic diagram.Under
Locking Single switch pipe open circuit fault position can be analyzed according to this phenomenon in face.
When having switching tube open circuit on primary and secondary inverter, 2 and 3 sector time of such as Fig. 3 substantially become big, now locate
In a phase position, correspond to t1 and t2 simultaneously and change also very greatly；The Fig. 5 that compares gets along generation open circuit fault for secondary inverter b, right
Answer sector time 1 and 5, be now in b phase position, and the inverter c phase place of breaking down is then at sector time 4 and 6.According to figure
4 different with t1, t2 position priority of Fig. 6 when can be out of order Fig. 4 occur primary and t1 after be secondary.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. a kind of fault of converter in winding electric machine drive system of opening of twin inverter topological structure diagnoses and fault tolerant control method,
It is characterized in that: diagnosed and faults-tolerant control electricity by the fault of converter in winding electric machine drive system of opening of twin inverter topological structure
Road is realized, and this circuit includes primary electromagnetic relay (7) and primary over-current detection resistance (9), and secondary electromagnetic relay (8)
With secondary over-current detection resistance (10)；Primary electromagnetic relay (7) includes the first normal open switch (7-1), the second normal open switch (7-
2), the 3rd normal open switch (7-3) and the first normally closed switch (7-4), first normal open switch (7-1) of primary electromagnetic relay (7)
In parallel with primary direct current potential source (5), primary over-current detection resistance (9) be connected on primary electrical potential source (5) and primary electric capacity (3) it
Between, the first normally closed switch (7-4) is connected between primary electric capacity (3) and primary inverter (1), the second normal open switch (7-2)
One end connects the common port of primary direct current potential source (5) and primary electric capacity (3), and the other end of the second normal open switch (7-2) connects
Secondary direct voltage source (6) and the common port of secondary capacitance (4), one end of the 3rd normal open switch (7-3) connects primary excessively stream inspection
Measuring resistance (9) and the common port of primary electric capacity (3), the other end of the 3rd normal open switch (7-3) connects secondary over-current detection resistance
(10) common port with secondary capacitance (4)；Secondary electromagnetic relay (8) includes the 4th normal open switch (8-1), the 5th normal open switch
(8-2), the 6th normal open switch (8-3) and the second normally closed switch (8-4), the 4th normal open switch (8- of secondary electromagnetic relay (8)
1) in parallel with secondary direct voltage source (6), secondary over-current detection resistance (10) is connected on secondary electrical potential source (6) and secondary capacitance
(4), between, the second normally closed switch (8-4) is connected between secondary capacitance (4) and secondary inverter (2), the 5th normal open switch (8-
2) one end connects the common port of primary direct current potential source (5) and primary electric capacity (3), the other end of the 5th normal open switch (8-2)
Connect the common port of secondary direct voltage source (6) and secondary capacitance (4), one end of the 6th normal open switch (8-3) connects primary mistake
Stream detection resistance (9) and the common port of primary electric capacity (3), the other end of the 6th normal open switch (8-3) connects secondary over-current detection
Resistance (10) and the common port of secondary capacitance (4)；Motor fault-tolerant run after electromagnetic relay (7) or electromagnetic relay (8) normal
Close and switch off, non-faulty inverter is excised, two power sources in parallel are run by normally opened closure.
2. a kind of twin inverter topological structure according to claim 1 open fault of converter in winding electric machine drive system
Diagnosis is with fault tolerant control method it is characterised in that the concrete steps of short trouble overcurrent protection fault-tolerant operation include:
(1) detect the curtage of primary over-current detection resistance (9) and secondary over-current detection resistance (10), if detect
Curtage is more than set-point, sends overcurrent protection signal；
(2) controller responds rapidly to action electromagnetic relay, the first normally closed switch (7-4) is disconnected, the first normal open switch (7-1)
Closure, diode common cathode on the first inverter switching device components and parts for the inverse parallel and common-anode are shorted together, and simultaneously the
Two normal open switch (7-2) and the 3rd normal open switch (7-3) closure, primary direct current potential source (5) is parallel to secondary direct voltage
Source (6) works on；Or the second normally closed switch (8-4) is disconnected, the 4th normal open switch (8-1) closure, by inverse parallel the
Diode common cathode on two inverter switching device components and parts and common-anode are shorted together, simultaneously the 5th normal open switch (8-2) and
6th normal open switch (8-3) closure, secondary direct voltage source (6) is parallel to primary direct current potential source (5) and works on.
3. a kind of twin inverter topological structure according to claim 1 open fault of converter in winding electric machine drive system
Diagnosis is with fault tolerant control method it is characterised in that the fault of converter diagnosis after switching device open circuit is run with failure tolerant
Step include:
(1) under the effect of detection voltage vector two neighboring vector t1 and t2 action time, by t1 and t2 detecting with given
Value compares, if t1 the and t2 time is more than set-point, judges to break down；
(2) according to the sector number failure judgement phase that abnormal t1 and t2 place sector occurs；
(3) inverter that the sequencing judgement of the appearance according to abnormal t1 and t2 is broken down, if t1 is formerly, t2 exists
Afterwards, then judge that primary inverter breaks down；If t2 is formerly, t1 rear, judges that secondary inverter breaks down；
(4) controller responds rapidly to action electromagnetic relay, if primary inverter breaks down, by the first normally closed switch
(7-4) disconnect, the first normal open switch (7-1) closes, by diode common cathode on the first inverter switching device components and parts for the inverse parallel
Pole and common-anode are shorted together, simultaneously the second normal open switch (7-2) and the 3rd normal open switch (7-3) closure, by primary direct current
Voltage source (5) is parallel to secondary direct voltage source (6) and works on；If secondary inverter breaks down, normally closed by second
Switch (8-4) disconnects, and the 4th normal open switch (8-1) closure, by diode on the second inverter switching device components and parts for the inverse parallel
Common cathode and common-anode are shorted together, simultaneously the 5th normal open switch (8-2) and the 6th normal open switch (8-3) closure, by secondary
Direct voltage source (6) is parallel to primary direct current potential source (5) and works on.
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| CN201610818479.9A CN106357144B (en) | 2016-09-12 | 2016-09-12 | A kind of twin inverter topological structure opens fault of converter diagnosis and fault tolerant control method in winding electric machine drive system |
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|---|---|---|---|
| CN201610818479.9A CN106357144B (en) | 2016-09-12 | 2016-09-12 | A kind of twin inverter topological structure opens fault of converter diagnosis and fault tolerant control method in winding electric machine drive system |
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| CN110620519A (en) * | 2018-06-18 | 2019-12-27 | 株式会社电装 | Drive system for an electric motor |
| CN110632437A (en) * | 2019-09-20 | 2019-12-31 | 合肥工业大学 | Open-circuit fault diagnosis method for switching tube of common neutral line open-winding electric drive system |
| CN110749842A (en) * | 2019-11-08 | 2020-02-04 | 中南大学 | Voltage source type inverter switch open-circuit fault diagnosis method based on common-mode voltage |
| CN111216575A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Electric automobile and open winding electric automobile drive and charging system |
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| GB2619580A (en) * | 2022-02-14 | 2023-12-13 | Univ Jiangsu | Variable operating condition stator permanent magnetic field enhanced hybrid excitation motor and driving control method therefor |
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| CN110495089A (en) * | 2017-03-31 | 2019-11-22 | 日本电产株式会社 | Power inverter, motor drive unit and electric power steering apparatus |
| CN110495089B (en) * | 2017-03-31 | 2021-06-22 | 日本电产株式会社 | Power conversion device, motor drive unit, and electric power steering device |
| CN110299886A (en) * | 2018-03-22 | 2019-10-01 | 丰田自动车株式会社 | Electric motor system |
| CN110299886B (en) * | 2018-03-22 | 2023-06-27 | 丰田自动车株式会社 | Motor system |
| CN110620519A (en) * | 2018-06-18 | 2019-12-27 | 株式会社电装 | Drive system for an electric motor |
| 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 |
| CN111216575A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Electric automobile and open winding electric automobile drive and charging system |
| CN110632437B (en) * | 2019-09-20 | 2020-09-18 | 合肥工业大学 | Open-circuit fault diagnosis method for switching tube of common neutral line open-winding electric drive system |
| CN110632437A (en) * | 2019-09-20 | 2019-12-31 | 合肥工业大学 | Open-circuit fault diagnosis method for switching tube of common neutral line open-winding electric drive system |
| CN110749842A (en) * | 2019-11-08 | 2020-02-04 | 中南大学 | Voltage source type inverter switch open-circuit fault diagnosis method based on common-mode voltage |
| CN113192779A (en) * | 2021-05-13 | 2021-07-30 | 大连理工大学 | Relay operating mechanism with double power switching, switching topological structure and control method |
| CN114252752A (en) * | 2021-12-22 | 2022-03-29 | 清华大学 | Fault diagnosis method for power tube in full-control bridge topology circuit |
| WO2023151110A1 (en) * | 2022-02-14 | 2023-08-17 | 江苏大学 | Variable operating condition stator permanent magnetic field enhanced hybrid excitation motor and driving control method therefor |
| GB2619580A (en) * | 2022-02-14 | 2023-12-13 | Univ Jiangsu | Variable operating condition stator permanent magnetic field enhanced hybrid excitation motor and driving control method therefor |
| US11909281B2 (en) | 2022-02-14 | 2024-02-20 | Jiangsu University | Stator-based permanent magnet field-enhanced hybrid-excitation motor capable of operating under multiple working conditions and drive control method thereof |
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