CN109001624A - A kind of driving motor of pure electric automobile rack automatic calibration method and its device - Google Patents
A kind of driving motor of pure electric automobile rack automatic calibration method and its device Download PDFInfo
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- CN109001624A CN109001624A CN201810413418.3A CN201810413418A CN109001624A CN 109001624 A CN109001624 A CN 109001624A CN 201810413418 A CN201810413418 A CN 201810413418A CN 109001624 A CN109001624 A CN 109001624A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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Abstract
The invention discloses a kind of driving motor of pure electric automobile rack automatic calibration methods, steps are as follows: motor, host computer and dynamometer machine, electric machine controller and electromotor cooling system being connected first, according to the communications protocol modified address of motor and electric machine controller, motor type is confirmed and modifies associated technical parameters；Then it is recognized automatically, study rotor and rotation varied angle judge that motor enters weak magnetic area when revolving speed is much, needs vernier angle at this time, change in torque is little before and after so that motor is entered weak magnetic；Determine that motor enters the base speed threshold value n of weak magnetic area0, then learn the angle value that feedovers, automatic Calibration process is carried out later, finally carries out calibration verifying.
Description
Technical field:
The present invention relates to a kind of driving motor of pure electric automobile rack automatic calibration method and its devices, belong to pure electric vehicle vapour
The testing field of vehicle.
Background technique:
In pure electric automobile testing field, driving motor needs to carry out Bench calibration, current pure electricity using electric machine controller
The Bench calibration of electrical automobile driving motor is realized by the manually mode of demarcating, i.e., in different operating conditions, (different motors turn
Fast n and different motor demand torque T) under, it is matched to most by manually changing the value of Id (D shaft current) and Iq (Q shaft current)
Good demand torque, to obtain Id the and Iq table of demand.But this method manually demarcated can generate error in reading, can also lead
It is larger to send a telegraph machine range of temperature, to influence magnetic linkage size, the variation of magnetic linkage can directly result in the change of motor output torque
Change, and then influence stated accuracy, in addition, manual staking-out work intensity is big, the nominal time is long, can occupy engineer it is largely valuable when
Between, influence motor staking-out work efficiency.
Therefore, there is an urgent need to propose a kind of driving motor of pure electric automobile rack automatic calibration method at present.
Summary of the invention:
The purpose of the present invention is to solve the above problem, is marked automatically by providing a kind of driving motor of pure electric automobile rack
Determine method and device thereof, great work intensity, scalar period length, technical requirements height and stated accuracy when solving calibration motor manually
The problem of difference, improves the calibration efficiency of rack.
The present invention adopts the following technical scheme: a kind of driving motor of pure electric automobile rack automatic calibration method, step is such as
Under:
Motor, host computer and dynamometer machine, electric machine controller and electromotor cooling system are connected first, according to motor and electricity
The communications protocol modified address of machine controller, confirms motor type and modifies associated technical parameters；
Then it is recognized automatically, study rotor and rotation varied angle judge that motor enters weak magnetic area when revolving speed is much, at this time
Vernier angle is needed, change in torque is little before and after so that motor is entered weak magnetic；
Determine that motor enters the base speed threshold value n of weak magnetic area0, then learn the angle value that feedovers, automatic Calibration process is carried out later,
Finally carry out calibration verifying.
Further, motor temperature is first determined whether in target temperature range, and if it is not within the target range, then leads to
The mode for crossing control of rising again automatically carries out lower water temperature by electromotor cooling system, so that motor temperature control is in target zone
It is interior；
Secondly, judging whether motor speed enters weak magnetic area, that is, judge whether motor speed is greater than base speed threshold value n0If electric
Machine revolving speed is less than base speed threshold value, and different control electric current Is and angle theta are set in the area Ji Su, reads the output under current rotating speed n
Torque T, wherein Is2=Id2+Iq2, the angle of Is and Iq indicates with θ, θ from 0 ° to 45 ° change, by current rotating speed n, control
Angle theta, output torque T between electric current Is, Is and Iq are aggregated into Excel table, and the database preparation that will summarize calculates
The optimum current and output torque in the area Ji Su, to obtain MTPA optimum value；
With the raising of motor speed, after entering weak magnetic area, need to obtain the output torque under different calibration Id and Iq
T1, according to the torque of output, the torque coefficient K calculated under corresponding calibration Id and Iq is utilized finally according to torque coefficient K
Polyfit function in matlab carries out curve fitting, and obtains T1Best curve between-Id,
Torque coefficientWherein K is torque coefficient, T1For output torque, Id is D shaft current,
Iq is Q shaft current.
The present invention also adopts the following technical scheme that a kind of driving motor of pure electric automobile rack automatic calibration device, comprising:
Data acquisition module, for obtaining max. output torque T under different control electric current Is, and different calibration Id and Iq
Under max. output torque T1；
Data processing module calculates the area Ji Su according to the corresponding max. output torque T of different Is and corresponding angle, θ
Optimum current and output torque, to obtain MTPA optimum value, and turned round according to the maximum outputs under different calibration Id and Iq
Square T1, the torque coefficient K under corresponding calibration Id and Iq is calculated, carries out curve fitting further according to torque coefficient K, obtains T1- Id it
Between best curve.
The invention has the following beneficial effects: the present invention when carrying out driving motor of pure electric automobile Bench calibration, passes through
Host computer carries out control of rising again automatically to motor, eliminates influence of the temperature to output torque, passes through automatic current in the area Ji Su
Setting and automatic data processing, set motor control electric current, obtain the optimum value of MTPA, automatically to improve rack mark
Determine precision and efficiency.In weak magnetic area by giving different calibration Id and Iq, increases sampling number and improve stated accuracy, automatically
It reads corresponding output torque value and calculates corresponding torque coefficient and carried out curve fitting according to torque coefficient using Matlab,
Obtain T1The best curve of-Id substantially increases the working efficiency of motor calibration.In calibration verification process, different motors turn
It is judged automatically under speed and whether reaches target torque, and automatically individually list the revolving speed point for not reaching target torque.
Detailed description of the invention:
Fig. 1 is the general flow chart of driving motor of pure electric automobile rack automatic calibration method of the present invention.
The systematic schematic diagram of Fig. 2 driving motor of pure electric automobile rack automatic calibration method to realize the present invention.
Fig. 3 flow chart that driving motor of pure electric automobile rack automatic calibration method is verified to realize the present invention.
Specific embodiment:
The present invention will be further described below with reference to the drawings.
Driving motor of pure electric automobile rack automatic calibration method of the present invention, includes the following steps:
Fig. 1 simply shows the general flow chart of motor calibration of the present invention, first by host computer and dynamometer machine, electric machine controller
And electromotor cooling system is connected, and according to the communications protocol modified address of motor and electric machine controller, carries out to motor type true
Recognize, according to motor technology protocol modification associated technical parameters.It is recognized automatically later, study rotor and rotation varied angle, judgement
Motor enters weak magnetic area when revolving speed is much, needs vernier angle at this time, and change in torque is little before and after so that motor is entered weak magnetic.Determine electricity
Machine enters the base speed threshold value n of weak magnetic area0, finally learn the angle value that feedovers again.Automatic Calibration process is carried out later, is finally marked
Fixed verifying.
Fig. 2 simply shows the systematic schematic diagram for realizing the method for the present invention.It is automatic first before motor automatic Calibration
It rises again the realization of control, for permanent magnet synchronous motor, temperature has a major impact rotor flux, and magnetic linkage can directly result in
The variation of motor output torque, therefore need to be controlled motor temperature in the reasonable scope with host computer, make Id and Iq all basic
It is demarcated at identical temperature, guarantees the precision of calibration.Whether specific practice is to first determine whether motor temperature in target temperature
In range, if it is not within the target range, then motor bench is carried out in a manner of control of rising again automatically by electromotor cooling system
Lower water temperature, so that motor temperature control is in target zone.
Secondly, judging whether motor speed enters weak magnetic area, that is, judge whether motor speed is greater than base speed threshold value n0, at this time
Different control modes and different scaling methods need to be taken, the area Ji Jisu is controlled using MTPA (torque capacity and current ratio)
System, as motor speed increases, into after weak magnetic area, voltage limit ellipse is shunk, and is needed using weak magnetic control mode.
Different control electric current Is and angle theta are set in the area Ji Su, read the output torque T under current rotating speed n, wherein
Is2=Id2+Iq2, the angle of Is and Iq indicates with θ, θ from 0 ° to 45 ° change.
Angle theta between current rotating speed n, control electric current Is, Is and Iq, output torque T are aggregated into Excel table, it will
The database preparation summarized, calculates the optimum current and output torque in the area Ji Su, to obtain MTPA optimum value.
With the raising of motor speed, after entering weak magnetic area, need to obtain the output torque under different calibration Id and Iq
T1.According to the torque of output, the torque coefficient K calculated under corresponding calibration Id and Iq is utilized finally according to torque coefficient K
Polyfit function in matlab carries out curve fitting, and obtains T1Best curve between-Id.
Torque coefficientWherein K is torque coefficient, T1For output torque, Id is D shaft current,
Iq is Q shaft current.
Another aspect according to the present invention additionally provides a kind of driving motor of pure electric automobile rack automatic calibration device,
Include:
Data acquisition module, for obtaining max. output torque T under different control electric current Is, and different calibration Id and Iq
Under max. output torque T1。
Data processing module calculates the area Ji Su according to the corresponding max. output torque T of different Is and corresponding angle, θ
Optimum current and output torque, to obtain MTPA optimum value.And it is turned round according to the maximum output under different calibration Id and Iq
Square T1, the torque coefficient K under corresponding calibration Id and Iq is calculated, carries out curve fitting further according to torque coefficient K, obtains T1- Id it
Between best curve.
Output torque T is that rack surveys torque, judges whether current rotating speed n is greater than the base speed threshold value n of setting0If currently
Revolving speed is less than base speed threshold value n0, setting control electric current Is and angle theta, wherein the variation range of θ is from 0 ° to 45 °.It reads current
Rack under revolving speed n surveys torque.The setting carried out with control electric current Is and angle theta of the host computer to electric machine controller, motor
Controller controls motor according to the control electric current Is and angle theta of setting, and feedback signal is passed through motor control by motor later
Device processed is transferred on rack host computer.Database preparation is realized by best stator current control algorithm.If working as forward
Speed is greater than base speed threshold value n0, by obtaining the output torque T under different calibration Id and Iq1, according to the torque of output, calculate and correspond to
The torque coefficient K under Id and Iq is demarcated, finally according to torque coefficient K, it is quasi- to carry out curve using the Polyfit function in matlab
It closes, obtains T1Best curve between-Id.
Fig. 3 simply shows the flow chart for realizing motor calibration verifying of the present invention, different by giving when calibration is verified
Motor speed sees the target torque for whether reaching our requirements, if not reaching, system individually lists this revolving speed point, Zhi Houwo
This revolving speed is individually demarcated again.If verifying reaches target torque, calibration terminates.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
It for member, can also make several improvements without departing from the principle of the present invention, these improvement also should be regarded as of the invention
Protection scope.
Claims (3)
1. a kind of driving motor of pure electric automobile rack automatic calibration method, it is characterised in that: steps are as follows:
Motor, host computer and dynamometer machine, electric machine controller and electromotor cooling system are connected first, according to motor and motor control
The communications protocol modified address of device processed, confirms motor type and modifies associated technical parameters；
Then it is recognized automatically, study rotor and rotation varied angle judge that motor enters weak magnetic area when revolving speed is much, needs micro- at this time
Hue angle, change in torque is little before and after so that motor is entered weak magnetic；
Determine that motor enters the base speed threshold value n of weak magnetic area0, then learn the angle value that feedovers, automatic Calibration process is carried out later, finally
Carry out calibration verifying.
2. driving motor of pure electric automobile rack automatic calibration method as described in claim 1, it is characterised in that:
Motor temperature is first determined whether in target temperature range, if it is not within the target range, then passes through control of rising again automatically
The mode of system carries out lower water temperature by electromotor cooling system, so that motor temperature control is in target zone；
Secondly, judging whether motor speed enters weak magnetic area, that is, judge whether motor speed is greater than base speed threshold value n0If motor turns
Speed is less than base speed threshold value, and different control electric current Is and angle theta are set in the area Ji Su, reads the output torque under current rotating speed n
T, wherein Is2=Id2+Iq2, the angle of Is and Iq indicates with θ, θ from 0 ° to 45 ° change, by current rotating speed n, control electric current
Angle theta, output torque T between Is, Is and Iq are aggregated into Excel table, the database preparation that will summarize, and calculate base speed
The optimum current and output torque in area, to obtain MTPA optimum value；
With the raising of motor speed, after entering weak magnetic area, need to obtain the output torque T under different calibration Id and Iq1, root
According to the torque of output, the torque coefficient K under corresponding calibration Id and Iq is calculated, finally according to torque coefficient K, using in matlab
Polyfit function carries out curve fitting, and obtains T1Best curve between-Id,
Torque coefficientWherein K is torque coefficient, T1For output torque, Id is D shaft current, and Iq is
Q shaft current.
3. a kind of driving motor of pure electric automobile rack automatic calibration device, it is characterised in that: include:
Data acquisition module, for obtaining under max. output torque T under different control electric current Is, and different calibration Id and Iq
Max. output torque T1；
Data processing module calculates the area Ji Su most according to the corresponding max. output torque T of different Is and corresponding angle, θ
Good electric current and output torque, to obtain MTPA optimum value, and according to the max. output torque T under different calibration Id and Iq1,
The torque coefficient K under corresponding calibration Id and Iq is calculated, carries out curve fitting further according to torque coefficient K, obtains T1Between-Id
Best curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413418.3A CN109001624A (en) | 2018-05-03 | 2018-05-03 | A kind of driving motor of pure electric automobile rack automatic calibration method and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413418.3A CN109001624A (en) | 2018-05-03 | 2018-05-03 | A kind of driving motor of pure electric automobile rack automatic calibration method and its device |
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| CN109001624A true CN109001624A (en) | 2018-12-14 |
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| CN201810413418.3A Pending CN109001624A (en) | 2018-05-03 | 2018-05-03 | A kind of driving motor of pure electric automobile rack automatic calibration method and its device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781322A (en) * | 2019-01-24 | 2019-05-21 | 上汽大众汽车有限公司 | The test method of the drive-train efficiency of new-energy automobile |
| CN111948537A (en) * | 2020-08-11 | 2020-11-17 | 臻驱科技（上海）有限公司 | Method for calibrating maximum torque flux linkage ratio working point of salient pole type permanent magnet synchronous motor |
| CN113162502A (en) * | 2020-01-22 | 2021-07-23 | 北京新能源汽车股份有限公司 | Method and device for correcting calibration value of synchronous motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109781322A (en) * | 2019-01-24 | 2019-05-21 | 上汽大众汽车有限公司 | The test method of the drive-train efficiency of new-energy automobile |
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| CN111948537A (en) * | 2020-08-11 | 2020-11-17 | 臻驱科技（上海）有限公司 | Method for calibrating maximum torque flux linkage ratio working point of salient pole type permanent magnet synchronous motor |
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Application publication date: 20181214 |
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