CN104007358B - Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system - Google Patents
Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system Download PDFInfo
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- CN104007358B CN104007358B CN201410259128.XA CN201410259128A CN104007358B CN 104007358 B CN104007358 B CN 104007358B CN 201410259128 A CN201410259128 A CN 201410259128A CN 104007358 B CN104007358 B CN 104007358B
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Abstract
The invention discloses a kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system, the mode adopting emulation simulates the actual operating mode that permagnetic synchronous motor is current, and obtain when emulating short trouble threshold value when there is three phase short circuit fault when motor operates in this actual operating mode, then according to whether the PMSM Drive System that this short trouble threshold decision is actual there is short trouble, it is thus possible to the different operating conditions residing for electric automobile permagnetic synchronous motor, judge whether PMSM Drive System short trouble occurs rapidly and accurately, there is diagnosis speed fast, the technical advantages such as diagnostic accuracy is high, it is capable of PMSM Drive System to run safely and reliably.
Description
Technical field
The present invention relates to electric vehicle engineering field, particularly relate to a kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system.
Background technology
At present, the problem that environment and the energy become people's growing interest.At automotive field, the new-energy automobile of efficient, energy-conservation and environmental protection, one of inevitable development trend having become as automobile industry.PMSM Drive System can accomplish the purpose of low energy consumption and zero-emission, great marketization prospect.
Driving motor for electric automobile many employings brshless DC motor (BrushlessDirectCurrentMotor, and permagnetic synchronous motor (PermanentMagnetSynchronousMotor BLDCM), PMSM), the PMSM that performance is more superior is increasingly subject to researcher and the favor of electric automobile manufacturer, as the PMSM drive system of one of new-energy automobile kernel component, its safe and reliable operation is most crucial.Traditional fault detection and diagnosis method is relatively easy, it is impossible to suitable in all operating conditions of new-energy automobile, therefore can not reach the requirement of new-energy automobile high security, reliability.
The short trouble of motor generally adopts certain phase current more than or equal to 8 times of these criterions of rated current, and for underloading, the electric automobile that runs at a low speed, assume that three phase short circuit fault occurs in drive motor, because its short circuit current does not reach 8 times of rated current, utilize above-mentioned short trouble criterion to can't detect three phase short circuit fault, safe and reliable operation and the service life of electric automobile certainly will be affected.
Summary of the invention
In order to solve prior art can not accurately detect three phase short circuit fault, the problem affecting electric motor car reliability of operation and service life, the invention provides a kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method.
For achieving the above object, the technical scheme is that
A kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method, including:
The a phase current of the stator of permagnetic synchronous motor and the rotor position angle of b phase current and described permagnetic synchronous motor is obtained according to the sampling period set, and according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor；
Actual loading electric current and the actual speed of described permagnetic synchronous motor is obtained according to the described sampling period；
Set up PMSM Drive System phantom, and when being respectively equal to described actual loading electric current and actual speed when the load current and rotating speed that emulate motor in phantom, by the equal zero setting of stator three-phase voltage of described emulation motor, and obtain the simulated power of now described emulation motor；
According to described a phase current and b phase current and described actual power and simulated power, it is determined that whether described PMSM Drive System short trouble occurs.
Preferably, described according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor includes:
According to described a phase current, b phase current and rotor position angle, obtain d shaft current and the q shaft current of stator under rotating coordinate system；
According to described d shaft current and q shaft current, it is determined that the torque of described permagnetic synchronous motor；
Torque according to described permagnetic synchronous motor and described actual speed, it is determined that the actual power of described permagnetic synchronous motor.
Preferably, described according to described a phase current and b phase current and described actual power with simulated power, it is determined that whether described PMSM Drive System occurs that short trouble includes:
The a phase current of the stator according to described permagnetic synchronous motor and b phase current, obtain the c phase current of the stator of described permagnetic synchronous motor；
Judge that whether described actual power is less than or equal to described simulated power；
If it is, the rated current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
If it is not, then the peak point current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
Judge described a phase current, described b phase current or described c phase current whether continuously n time more than described short-circuit current threshold value, n is the natural number more than 0；
If it is, determine that short trouble occurs in described PMSM Drive System；
Otherwise, it determines there is not short trouble in described PMSM Drive System.
Preferably, when described actual power is less than or equal to described simulated power, it is determined that described short-circuit current threshold value is first parameter times of the rated current of described permagnetic synchronous motor, and described first parameter is 1.1～1.5；
When described actual power is more than described simulated power, it is determined that described short-circuit current threshold value is second parameter times of the peak point current of described permagnetic synchronous motor, and described second parameter is 1.1～1.5.
A kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle Fault Diagnosis System for Short, including:
First data acquisition unit, the rotor position angle of a phase current and b phase current and described permagnetic synchronous motor for obtaining the stator of permagnetic synchronous motor according to the sampling period set；
Actual power determines unit, for according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor；
Second data acquisition unit, for obtaining actual loading electric current and the actual speed of described permagnetic synchronous motor according to the described sampling period；
Simulation unit, for setting up PMSM Drive System phantom, and when being respectively equal to described actual loading electric current and actual speed when the load current and rotating speed that emulate motor in phantom, by the equal zero setting of stator three-phase voltage of described emulation motor, and obtain the simulated power of now described emulation motor；
Short trouble judging unit, for according to described a phase current and b phase current and described actual power and simulated power, it is determined that whether described PMSM Drive System short trouble occurs.
Preferably, described actual power determines that unit includes:
Current conversion unit, for according to described a phase current, b phase current and rotor position angle, obtaining d shaft current and the q shaft current of stator under rotating coordinate system；
Torque-determination unit, for the described d shaft current obtained according to described current conversion unit and q shaft current, it is determined that the torque of described permagnetic synchronous motor；
Actual power determines unit, for the torque of permagnetic synchronous motor determined according to described torque-determination unit and described actual speed, it is determined that the actual power of described permagnetic synchronous motor.
Preferably, described short trouble judging unit includes:
C phase current determines unit, for a phase current and the b phase current of the stator according to described permagnetic synchronous motor, obtains the c phase current of the stator of described permagnetic synchronous motor；
First judging unit, is used for judging that whether described actual power is less than or equal to described simulated power；And when described actual power is less than or equal to described simulated power, the rated current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；When described actual power is more than described simulated power, the peak point current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
Second judging unit, for judging that described a phase current, described b phase current or described c phase current determine the short-circuit current threshold value whether the c phase current that unit obtains is determined for n time continuously more than described first judging unit, n is the natural number more than 0；And when described a phase current, described b phase current or described c phase current continuous n time more than described short-circuit current threshold value, it is determined that there is short trouble in described PMSM Drive System；When described a phase current, described b phase current and described c phase current continuously n time more than described short-circuit current threshold value, it is determined that there is not short trouble in described PMSM Drive System.
Preferably, described first judging unit is specifically for when described actual power is less than or equal to described simulated power, determining first parameter times of the rated current that described short-circuit current threshold value is described permagnetic synchronous motor, described first parameter is 1.1～1.5；When described actual power is more than described simulated power, it is determined that described short-circuit current threshold value is second parameter times of the peak point current of described permagnetic synchronous motor, and described second parameter is 1.1～1.5.
The beneficial effects of the present invention is, application embodiment of the present invention Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system, the mode adopting emulation simulates the actual operating mode that permagnetic synchronous motor is current, and obtain when emulating short trouble threshold value when there is three phase short circuit fault when motor operates in this actual operating mode, then according to whether the PMSM Drive System that this short trouble threshold decision is actual there is short trouble, it is thus possible to the different operating conditions residing for electric automobile permagnetic synchronous motor, judge whether PMSM Drive System short trouble occurs rapidly and accurately, there is diagnosis speed fast, the technical advantages such as diagnostic accuracy is high, it is capable of PMSM Drive System to run safely and reliably.
Accompanying drawing explanation
Fig. 1 illustrates the flow chart of embodiment of the present invention Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method；
Fig. 2 illustrates in the embodiment of the present invention according to described a phase current, b phase current and rotor position angle, it is determined that the flow chart of the actual power of permagnetic synchronous motor；
Fig. 3 illustrates the structural representation of embodiment of the present invention Permanent Magnet Synchronous Motor Drives for Electric Vehicle Fault Diagnosis System for Short；
Fig. 4 illustrates that in the embodiment of the present invention, actual power determines the structural representation of unit；
Fig. 5 illustrates the structural representation of short circuit breakdown judge unit in the embodiment of the present invention.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining the present invention, and is not construed as limiting the claims.
For solving prior art adopts certain phase current more than or equal to 8 times of rated current diagnosis criterion as permagnetic synchronous motor short trouble, what cause can not accurately detect three phase short circuit fault, the final problem affecting electric motor car reliability of operation and service life, embodiments provides a kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system.
As it is shown in figure 1, be the flow chart of embodiment of the present invention Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method, said method comprising the steps of:
Step 101: obtain a phase current of the stator of permagnetic synchronous motor and the rotor position angle of b phase current and described permagnetic synchronous motor according to the sampling period set, and according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor.
Specifically, the three-phase current respectively a phase current of stator of permagnetic synchronous motor, b phase current and c phase current are set, owing to c phase current can pass through ic=-(ia+ib) calculate and obtain, so when gathering electric current, it is only necessary to utilize corresponding current sensor to gather a phase current of stator and the b phase current of permagnetic synchronous motor.The rotor position angle of permagnetic synchronous motor can pass through to be arranged on the position sensor at rotor place and collect.Owing to the detection of said stator electric current and rotor position angle belongs to the technological means that those skilled in the art's routine adopts, therefore do not do too much elaboration at this.
It addition, described according to described a phase current, b phase current and rotor position angle, it is determined that the method for the actual power of described permagnetic synchronous motor, it is set forth in hereinafter in conjunction with Fig. 2.
Step 102: obtain actual loading electric current and the actual speed of described permagnetic synchronous motor according to the described sampling period.
Specifically, the actual loading electric current of permagnetic synchronous motor can be collected by current sensor, it addition, the actual speed of permagnetic synchronous motor output both can be collected by speed probe, it is also possible to calculate according to described rotor position angle and obtain.Owing to acquisition and the computational methods of above-mentioned load current and motor speed belong to the technological means that those skilled in the art's routine adopts, therefore do not do too much elaboration at this.
Step 103: set up PMSM Drive System phantom, and when being respectively equal to described actual loading electric current and actual speed when the load current and rotating speed that emulate motor in phantom, by the equal zero setting of stator three-phase voltage of described emulation motor, and obtain the simulated power of now described emulation motor.
Specifically, described set up PMSM Drive System phantom and the emulation carried out based on this phantom, it it is the technological means of those skilled in the art's routine employing, such as, in " permagnetic synchronous motor (PMSM) Simulation of Vector Control based on Matlab/Simulink " literary composition by name that the Gao Yanrong of Nanjing University of Technology Automation Institute delivered on the periodical of " lathe and hydraulic pressure " by name in July, 2008 described simulation means, therefore be not described in detail in this article.
Step 104: according to described a phase current and b phase current and described actual power and simulated power, it is determined that whether described PMSM Drive System short trouble occurs.Wherein said determine whether described PMSM Drive System occurs that short trouble comprises the following steps:
The a phase current i of the stator according to described permagnetic synchronous motoraWith b phase current ib, utilize formula ic=-(ia+ib) obtain the c phase current i of the stator of described permagnetic synchronous motorc；
Judge that whether described actual power P is less than or equal to described simulated power P'；
If it is, the rated current I according to described permagnetic synchronous motore, it is determined that short-circuit current threshold value Imax；
If it is not, then the peak point current I according to described permagnetic synchronous motorm, it is determined that short-circuit current threshold value Imax；
Judge described a phase current ia, described b phase current ibOr described c phase current icWhether continuously n time more than described short-circuit current threshold value Imax, n is the natural number more than 0；
If it is, determine that short trouble occurs in described PMSM Drive System；
Otherwise, it determines there is not short trouble in described PMSM Drive System.
Specifically, owing to the short trouble judgment basis of permagnetic synchronous motor is a fixing threshold values in prior art, it is generally, and for electric automobile, this criterion can not be suitable for all of running status.Such as underloading, the electric automobile that runs at a low speed, assume that three phase short circuit fault occurs in drive motor, because its short circuit current does not reach 8 times of rated current, utilize above-mentioned short trouble criterion to can't detect three phase short circuit fault, safe and reliable operation and the service life of electric automobile certainly will be affected.
For this, the measure that the embodiment of the present invention is taked is: utilize the short trouble emulating motor simulation permagnetic synchronous motor in the SIMULINK modeling and simulating assembly of MATLAB, and utilize the actual power of the emulation motor power (simulated power) when being short-circuited fault and permagnetic synchronous motor, it is judged that whether permagnetic synchronous motor is short-circuited fault.
Specifically, first in the SIMULINK modeling and simulating assembly of MATLAB, PMSM Drive System phantom is built, consider single-phase earthing fault and two-phase short-circuit fault, they caused short circuit currents are all higher than the short circuit current that three phase short circuit fault causes, for this, it is only necessary to consider three phase short circuit fault.During emulation, the load current being gradually increased emulation motor the rotating speed controlling emulation motor increase, until when the load current of emulation motor and rotating speed are respectively equal to actual loading electric current and the actual speed of permagnetic synchronous motor, by the stator three-phase voltage U of emulation motora、Ub、UcZero setting simultaneously, so can simulate the generation of permagnetic synchronous motor three phase short circuit fault in SIMULINK.Then by the peak point current I of emulation motormThe maximum I of the short-circuit current caused when occurring as three phase short circuit faultm', and the peak point current I according to emulation motormCalculate current power (i.e. simulated power) P' emulating motor.Thus mean when permagnetic synchronous motor actual power P lower than emulation motor simulated power P' time, the short circuit current minima that permagnetic synchronous motor is short-circuited caused by fault is lower than the peak point current I of described motorm, and when the actual power P of permagnetic synchronous motor is higher than the simulated power P' of emulation motor, the permagnetic synchronous motor short circuit current minima caused by fault that is short-circuited will be above the peak point current I of described motorm.Once obtain the simulated power P' of emulation motor, by this simulated power P' compared with described actual power P': if actual power P≤simulated power P', then by short-circuit current threshold value IMAXIt is set as the Rated motor electric current I of the first parameter timese；If actual power P > simulated power is P', current threshold IMAXIt is set as the motor peak point current I of the second parameter timesm, the first parameter and the second parameter are correction factor here, are generally chosen as 1.1～1.5.
Then, a phase current i according to the permanent-magnetic synchronous motor stator gota, b phase current ib, c phase current ic, and the short-circuit current threshold value I that obtains according to said methodmaxRealize the short trouble diagnosis of PMSM Drive System: judge described a phase current iaWhether continuously n time more than described short-circuit current threshold value Imax, or described b phase current ibWhether continuously n time more than described short-circuit current threshold value Imax, or described c phase current icWhether continuously n time more than described short-circuit current threshold value Imax, wherein n is the natural number more than 0, it is preferred to 3；If it is, determine that short trouble occurs in described PMSM Drive System；Otherwise, it determines there is not short trouble in described PMSM Drive System.
As in figure 2 it is shown, be according to described a phase current, b phase current and rotor position angle in the embodiment of the present invention, it is determined that the flow chart of the actual power of permagnetic synchronous motor, the described actual power determining described permagnetic synchronous motor comprises the following steps:
Step 201: according to described a phase current ia, b phase current ibWith rotor position angle θ, utilize formulaObtain the stator d shaft current i of permagnetic synchronous motor under rotating coordinate systemdWith q shaft current iq。
Step 202: according to described d shaft current idWith q shaft current iq, utilize formula Te=p × [ψf×iq+(Ld-Lq)×id×iq] determine the torque T of described permagnetic synchronous motore, wherein p represents the number of pole-pairs of permagnetic synchronous motor, ψfRepresent the magnetic linkage that the permanent magnet of permagnetic synchronous motor produces, LdRepresent d axle inductance, LqRepresent q axle inductance.
Step 203: the torque T according to described permagnetic synchronous motoreWith described actual speed ωr, utilize formulaDetermine the actual power P of described permagnetic synchronous motor.
To sum up, application embodiment of the present invention Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method, the mode adopting emulation simulates the actual operating mode that permagnetic synchronous motor is current, and obtain when emulating short trouble threshold value when there is three phase short circuit fault when motor operates in this actual operating mode, then according to whether the PMSM Drive System that this short trouble threshold decision is actual there is short trouble, it is thus possible to the different operating conditions residing for electric automobile permagnetic synchronous motor, judge whether PMSM Drive System short trouble occurs rapidly and accurately, there is diagnosis speed fast, the technical advantages such as diagnostic accuracy is high, it is capable of PMSM Drive System to run safely and reliably.
Correspondingly, the embodiment of the present invention also provides for a kind of Permanent Magnet Synchronous Motor Drives for Electric Vehicle Fault Diagnosis System for Short.
As it is shown on figure 3, be the structural representation of this diagnostic system, this system includes:
First data acquisition unit 301, the rotor position angle of a phase current and b phase current and described permagnetic synchronous motor for obtaining the stator of permagnetic synchronous motor according to the sampling period set；
Actual power determines unit 302, for according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor；
Second data acquisition unit 303, for obtaining actual loading electric current and the actual speed of described permagnetic synchronous motor according to the described sampling period；
Simulation unit 304, for setting up PMSM Drive System phantom, and when being respectively equal to described actual loading electric current and actual speed when the load current and rotating speed that emulate motor in phantom, by the equal zero setting of stator three-phase voltage of described emulation motor, and obtain the simulated power of now described emulation motor；
Short trouble judging unit 305, for according to described a phase current and b phase current and described actual power and simulated power, it is determined that whether described PMSM Drive System short trouble occurs.
As shown in Figure 4, it is that Fig. 4 illustrates that in the embodiment of the present invention, actual power determines that the structural representation of unit 302, described actual power determine that unit 302 includes:
Current conversion unit 401, for according to described a phase current, b phase current and rotor position angle, obtaining d shaft current and the q shaft current of stator under rotating coordinate system；
Torque-determination unit 402, for the described d shaft current obtained according to described current conversion unit 401 and q shaft current, it is determined that the torque of described permagnetic synchronous motor；
Actual power determines unit 403, for the torque of permagnetic synchronous motor determined according to described torque-determination unit 402 and described actual speed, it is determined that the actual power of described permagnetic synchronous motor.
As it is shown in figure 5, be the structural representation of short circuit breakdown judge unit 305 in the embodiment of the present invention, described short trouble judging unit 305 includes:
C phase current determines unit 501, for a phase current and the b phase current of the stator according to described permagnetic synchronous motor, obtains the c phase current of the stator of described permagnetic synchronous motor；
First judging unit 502, is used for judging that whether described actual power is less than or equal to described simulated power；And when described actual power is less than or equal to described simulated power, the rated current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；When described actual power is more than described simulated power, the peak point current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
Second judging unit 503, for judging that described a phase current, described b phase current or described c phase current determine the short-circuit current threshold value whether the c phase current that unit 501 obtains is determined for n time continuously more than described first judging unit 502, n is the natural number more than 0；And when described a phase current, described b phase current or described c phase current continuous n time more than described short-circuit current threshold value, it is determined that there is short trouble in described PMSM Drive System；When described a phase current, described b phase current and described c phase current continuously n time more than described short-circuit current threshold value, it is determined that there is not short trouble in described PMSM Drive System.
Especially, described first judging unit 502 is specifically for when described actual power is less than or equal to described simulated power, determining first parameter times of the rated current that described short-circuit current threshold value is described permagnetic synchronous motor, described first parameter is 1.1～1.5；When described actual power is more than described simulated power, it is determined that described short-circuit current threshold value is second parameter times of the peak point current of described permagnetic synchronous motor, and described second parameter is 1.1～1.5.
What deserves to be explained is, the concrete processing procedure of above-mentioned each unit can refer to the description in the method for the above embodiment of the present invention, does not repeat them here.
To sum up, application embodiment of the present invention Permanent Magnet Synchronous Motor Drives for Electric Vehicle Fault Diagnosis System for Short, the mode adopting emulation simulates the actual operating mode that permagnetic synchronous motor is current, and obtain when emulating short trouble threshold value when there is three phase short circuit fault when motor operates in this actual operating mode, then according to whether the PMSM Drive System that this short trouble threshold decision is actual there is short trouble, it is thus possible to the different operating conditions residing for electric automobile permagnetic synchronous motor, judge whether PMSM Drive System short trouble occurs rapidly and accurately, there is diagnosis speed fast, the technical advantages such as diagnostic accuracy is high, it is capable of PMSM Drive System to run safely and reliably.
System embodiment described above is merely schematic, the wherein said unit illustrated as separating component can be or may not be physically separate, the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of module therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The structure of the present invention, feature and action effect is described in detail above according to graphic shown embodiment; the foregoing is only presently preferred embodiments of the present invention; but the present invention is not to limit practical range shown in drawing; every change made according to the conception of the present invention; or it is revised as the Equivalent embodiments of equivalent variations; still without departing from description with diagram contain spiritual time, all should in protection scope of the present invention.
Claims (8)
1. a Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method, it is characterised in that including:
The a phase current of the stator of permagnetic synchronous motor and the rotor position angle of b phase current and described permagnetic synchronous motor is obtained according to the sampling period set, and according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor；
Actual loading electric current and the actual speed of described permagnetic synchronous motor is obtained according to the described sampling period；
Set up PMSM Drive System phantom, and when being respectively equal to described actual loading electric current and actual speed when the load current and rotating speed that emulate motor in phantom, by the equal zero setting of stator three-phase voltage of described emulation motor, and obtain the simulated power of now described emulation motor；
According to described a phase current and b phase current and described actual power and simulated power, it is determined that whether described PMSM Drive System short trouble occurs.
2. method according to claim 1, it is characterised in that described according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor includes:
According to described a phase current, b phase current and rotor position angle, obtain d shaft current and the q shaft current of stator under rotating coordinate system；
According to described d shaft current and q shaft current, it is determined that the torque of described permagnetic synchronous motor；
Torque according to described permagnetic synchronous motor and described actual speed, it is determined that the actual power of described permagnetic synchronous motor.
3. method according to claim 1 and 2, it is characterised in that described according to described a phase current and b phase current and described actual power with simulated power, it is determined that whether described PMSM Drive System occurs that short trouble includes:
The a phase current of the stator according to described permagnetic synchronous motor and b phase current, obtain the c phase current of the stator of described permagnetic synchronous motor；
Judge that whether described actual power is less than or equal to described simulated power；
If it is, the rated current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
If it is not, then the peak point current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
Judge described a phase current, described b phase current or described c phase current whether continuously n time more than described short-circuit current threshold value, n is the natural number more than 0；
If it is, determine that short trouble occurs in described PMSM Drive System；
Otherwise, it determines there is not short trouble in described PMSM Drive System.
4. method according to claim 3, it is characterised in that
When described actual power is less than or equal to described simulated power, it is determined that described short-circuit current threshold value is first parameter times of the rated current of described permagnetic synchronous motor, and described first parameter is 1.1～1.5；
When described actual power is more than described simulated power, it is determined that described short-circuit current threshold value is second parameter times of the peak point current of described permagnetic synchronous motor, and described second parameter is 1.1～1.5.
5. a Permanent Magnet Synchronous Motor Drives for Electric Vehicle Fault Diagnosis System for Short, it is characterised in that including:
First data acquisition unit, the rotor position angle of a phase current and b phase current and described permagnetic synchronous motor for obtaining the stator of permagnetic synchronous motor according to the sampling period set；
Actual power determines unit, for according to described a phase current, b phase current and rotor position angle, it is determined that the actual power of described permagnetic synchronous motor；
Second data acquisition unit, for obtaining actual loading electric current and the actual speed of described permagnetic synchronous motor according to the described sampling period；
Simulation unit, for setting up PMSM Drive System phantom, and when being respectively equal to described actual loading electric current and actual speed when the load current and rotating speed that emulate motor in phantom, by the equal zero setting of stator three-phase voltage of described emulation motor, and obtain the simulated power of now described emulation motor；
Short trouble judging unit, for according to described a phase current and b phase current and described actual power and simulated power, it is determined that whether described PMSM Drive System short trouble occurs.
6. system according to claim 5, it is characterised in that described actual power determines that unit includes:
Current conversion unit, for according to described a phase current, b phase current and rotor position angle, obtaining d shaft current and the q shaft current of stator under rotating coordinate system；
Torque-determination unit, for the described d shaft current obtained according to described current conversion unit and q shaft current, it is determined that the torque of described permagnetic synchronous motor；
Actual power determines unit, for the torque of permagnetic synchronous motor determined according to described torque-determination unit and described actual speed, it is determined that the actual power of described permagnetic synchronous motor.
7. the system according to claim 5 or 6, it is characterised in that described short trouble judging unit includes:
C phase current determines unit, for a phase current and the b phase current of the stator according to described permagnetic synchronous motor, obtains the c phase current of the stator of described permagnetic synchronous motor；
First judging unit, is used for judging that whether described actual power is less than or equal to described simulated power；And when described actual power is less than or equal to described simulated power, the rated current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；When described actual power is more than described simulated power, the peak point current according to described permagnetic synchronous motor, it is determined that short-circuit current threshold value；
Second judging unit, for judging that described a phase current, described b phase current or described c phase current determine the short-circuit current threshold value whether the c phase current that unit obtains is determined for n time continuously more than described first judging unit, n is the natural number more than 0；And when described a phase current, described b phase current or described c phase current continuous n time more than described short-circuit current threshold value, it is determined that there is short trouble in described PMSM Drive System；When described a phase current, described b phase current and described c phase current continuously n time more than described short-circuit current threshold value, it is determined that there is not short trouble in described PMSM Drive System.
8. system according to claim 7, it is characterized in that, described first judging unit is specifically for when described actual power is less than or equal to described simulated power, determining first parameter times of the rated current that described short-circuit current threshold value is described permagnetic synchronous motor, described first parameter is 1.1～1.5；When described actual power is more than described simulated power, it is determined that described short-circuit current threshold value is second parameter times of the peak point current of described permagnetic synchronous motor, and described second parameter is 1.1～1.5.
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| CN201410259128.XA CN104007358B (en) | 2014-06-11 | 2014-06-11 | Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system |
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| CN201410259128.XA CN104007358B (en) | 2014-06-11 | 2014-06-11 | Permanent Magnet Synchronous Motor Drives for Electric Vehicle short trouble diagnostic method and system |
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| TWI666460B (en) * | 2018-08-10 | 2019-07-21 | 東元電機股份有限公司 | Rapid test method for motor layer short |
| US11467214B2 (en) * | 2018-10-31 | 2022-10-11 | Abb Schweiz Ag | Anomaly detection system and method for electric drives |
| CN109655746A (en) * | 2019-01-11 | 2019-04-19 | 锦州汉拿电机有限公司 | Motor data interactive device, system and vehicle |
| CN110417199B (en) * | 2019-07-10 | 2021-01-26 | 贵州航天林泉电机有限公司 | Anti-short-circuit permanent magnet generator design method based on interval frequency |
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