CN102162759B - Method and system for testing torque of electric automobile - Google Patents
Method and system for testing torque of electric automobile Download PDFInfo
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- CN102162759B CN102162759B CN201010612183.4A CN201010612183A CN102162759B CN 102162759 B CN102162759 B CN 102162759B CN 201010612183 A CN201010612183 A CN 201010612183A CN 102162759 B CN102162759 B CN 102162759B
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Abstract
The invention discloses a method for testing a torque of an electric automobile. The method comprises the following steps of: connecting a tested motor and a dynamometer; measuring the torque and the rotating speed of the tested motor in real time by using a torque and rotating speed sensor; and measuring output power and input current of the motor in real time by using a power analyzer and an oscilloscope. The method is characterized by collecting a three-phase current and the rotating speed, substituting data into a preprogrammed procedure to directly obtain a current amplitude value and a trace of an alternating-direct current shaft, and connecting the power analyzer, the oscilloscope, the dynamometer and the computer to directly obtain an intuitional control effect. By the test system, the torque of the electric automobile can be tested accurately and quickly, so that an electric control unit (ECU) of the automobile can be guided to precisely control the motor of the automobile.
Description
Technical field
The present invention relates to Control of Electric Vehicles field, particularly a kind of method of testing automobile moment of torsion and realize the test macro of the method.
Background technology
At present, the use effectively and reasonably of the protection of people's pay attention to day by day environment and the energy.Therefore, electric automobiles efficient, energy-saving and environmental protection just become the development trend of automobile industry.Electric automobile can be divided into pure electric automobile and hybrid vehicle, but they have common feature to need motor to drive running gear.The control accuracy of motor and reliability become the key that affects vehicle performance like this.
Conventionally in the process of testing of electric motors, pass through directly observation three-phase current, the effect of control is analyzed and judged to voltage and bus.Although this way simple, intuitive, is difficult to provide data analysis accurately and is beneficial to the perfect of controller.Best bet is ac-dc axis size of current and the track that can directly measure motor, analyzes accurately the control accuracy of motor speed and moment of torsion.But the test that does not also have ready-made power analyzer to be correlated with on the market at present.
Summary of the invention
The object of this invention is to provide electric automobile torque method of testing and test macro, utilize this test macro can test quickly and accurately electric automobile torque, instruct the ECU of automobile accurately electric motor of automobile to be controlled.
The present invention realizes the technical scheme that its object adopts to be: a kind of electric automobile torque method of testing, to be connected with dynamometer machine by measured motor, utilize torque speed sensor to measure by the moment of torsion of measured motor, rotating speed in real time, utilize power analyzer and oscillograph to measure in real time output power and the input current of motor simultaneously, comprise the following steps:
A, startup dynamometer machine;
B, control by measured motor by given torque value output torque, the difference of display measurement moment of torsion and given moment of torsion on power analyzer simultaneously;
C, draw out ac-dc axis size of current and trajectory diagram;
D, obtain the difference of given moment of torsion and actual output torque ac-dc axis electric current under different rotating speeds, in the time that this difference is zero, stop test, otherwise, upgrade the ac-dc axis reometer of electric machine controller software, return to step B.
Further, in above-mentioned a kind of electric automobile torque method of testing: draw out ac-dc axis size of current and trajectory diagram in described step C and carry out as follows:
The correlation parameter of C1, typing driving motor for electric automobile;
C2, three-phase current and rotary speed data are imported to program;
C3, set up quadrature axis electric current, the data matrix of the relative position angle of direct-axis current and stator and rotor;
C4, calculate the relative position angle of stator and rotor by the rotating speed and the time data that gather;
C5, utilize the stator that four-step calculation goes out to obtain its corresponding sine and cosine value with the relative position angle of rotor;
C6, the relative position angle of passing through the above three-phase current obtaining and stator and rotor and sine thereof and cosine value calculate the ac-dc axis electric current of rotatable coordinate axis;
C7, draw the trajectory diagram of ac-dc axis electric current.
Further, in above-mentioned a kind of electric automobile torque method of testing: in described step C2, three-phase current is transferred to host computer after by oscilloscope measurement.Described oscilloscope measurement one phase current, and current data is transferred on host computer, by the synthetic other two-phase of host computer.
Another object of the present invention is to provide a kind of electric automobile torque test macro, comprise dynamometer machine and be connected by the output shaft of measured motor, also comprise in addition torque speed sensor, oscillograph, power analyzer and host computer, described torque speed sensor is arranged on dynamometer machine and by between the output shaft of measured motor, described oscillographic test probe is connected on the input current of the described input end measuring motor of being powered by measured motor, the input end of described power analyzer is connected with described torque speed sensor output terminal and the power input of motor respectively, described oscillograph, host computer described in the output termination of power analyzer.
In measuring method of the present invention, motor vector controlled is changed three-phase electricity is transformed into two-phase electricity by static and rotational coordinates, hands over constant current to realize decoupling zero by controlling rotatable coordinate axis.The present invention is by a kind of special mode of connection comprehensive power analyser, and oscillographic data reduction hands over constant current size and track to judge the control effect of Motor torque and magnetic linkage.It has following features:
Gather three-phase current (single-phase if condition does not allow can be, another biphase current can synthesize) and rotating speed;
Ac-dc axis current amplitude and track that the prior coding of data substitution directly obtains;
Link power analyzer, oscillograph, dynamometer machine and computing machine directly obtain and control intuitively effect.
Below by with accompanying drawing, technical scheme of the present invention being carried out to comparatively detailed description in conjunction with specific embodiments.
Brief description of the drawings
Accompanying drawing 1 is the embodiment of the present invention 1 system chart.
Accompanying drawing 2 is process flow diagrams that the embodiment of the present invention 1 is drawn ac-dc axis size of current and trajectory diagram.
In figure: 1, dynamometer machine, 2, torque speed sensor, 3, by measured motor, 4, power analyzer, 5, oscillograph, 6, host computer.
Embodiment
Embodiment 1: as shown in Figure 1, the present embodiment is a kind of test macro that motor in hybrid vehicle is carried out to torsion-testing, the device that this system comprises has: dynamometer machine 1, torque speed sensor 2, by measured motor 3, power analyzer 4, oscillograph 5 and host computer 6, dynamometer machine 1 be connected by the output shaft of measured motor 3, absorb by the output torque being produced by measured motor 3, torque speed sensor 2 is arranged on dynamometer machine 1 and by between measured motor 3, measure due to torque and the rotating speed size when to dynamometer machine 1 transmitted power and moment of torsion by measured motor 3, the test probe of oscillograph 5 is connected on by the power input current of input end measuring motor of measured motor 3, carry out real-time current measurement and demonstration, just result outputs to host computer 6, the torque when to dynamometer machine 1 transmitted power and moment of torsion by measured motor 3 and the large smallest number of rotating speed that power analyzer 4 is measured by reception torque speed sensor 2 calculate by the real-time output power of measured motor 3, measure the power input own by measured motor 3 simultaneously, this power input should be consistent with the power of setting, on power analyzer 4, two above-mentioned power are processed in real time, the difference of two power numbers is shown in real time, and measurement result is outputed to host computer 6, processed by host computer, thereby acquisition test result.The testing procedure of said system is as follows:
A, startup dynamometer machine;
B, control by measured motor by given torque value output torque, the difference of display measurement moment of torsion and given moment of torsion on power analyzer simultaneously;
C, draw out ac-dc axis size of current and trajectory diagram, this steps flow chart as shown in Figure 2;
The correlation parameter of C1, typing driving motor for electric automobile;
C2, three-phase current and rotary speed data are imported to program;
C3, set up quadrature axis electric current, the data matrix of the relative position angle (wet) of direct-axis current and stator and rotor;
C4, by gather rotating speed and time data calculate wet;
C5, the wet that utilizes four-step calculation to go out obtain sine and the cosine value of its correspondence;
C6, the three-phase current that passes through above acquisition and wet and sine thereof and cosine value calculate the ac-dc axis electric current of rotatable coordinate axis;
C7, draw the trajectory diagram of ac-dc axis electric current.
D, obtain the difference of given moment of torsion and actual output torque ac-dc axis electric current under different rotating speeds, in the time that this difference is zero, stop test, otherwise, upgrade the ac-dc axis reometer of electric machine controller software, return to step B.
The first step starts dynamometer machine; Second step control, by measured motor output torque, shows the difference of mechanical torque and given moment of torsion simultaneously on observed power analyser; The 3rd step starts host computer test procedure specific algorithm in computing machine and sees Fig. 2, draws out ac-dc axis size of current and track; The 4th step is obtained the difference of given moment of torsion and actual output torque ac-dc axis electric current under different rotating speeds, upgrades Electric Machine Control software ac-dc axis reometer.Repeat the first step until given moment of torsion and actual torque deviation are zero.
In addition, in the present embodiment: in step C2, three-phase current is transferred to host computer after by oscilloscope measurement.If can not measure the electric current of three-phase simultaneously, also with by oscilloscope measurement one phase current, and current data is transferred on host computer, by the synthetic other two-phase of host computer.
Claims (4)
1. an electric automobile torque method of testing, to be connected with dynamometer machine by measured motor, utilize torque speed sensor to measure by the moment of torsion of measured motor, rotating speed in real time, utilize power analyzer and oscillograph to measure in real time output power and the input current of motor simultaneously, it is characterized in that: comprise the following steps:
A, startup dynamometer machine;
B, control by measured motor by given torque value output torque, the difference of display measurement moment of torsion and given moment of torsion on power analyzer simultaneously;
C, draw out ac-dc axis size of current and trajectory diagram;
D, obtain the difference of given moment of torsion and actual output torque ac-dc axis electric current under different rotating speeds, in the time that this difference is zero, stop test, otherwise, upgrade the ac-dc axis reometer of electric machine controller software, return to step B.
2. a kind of electric automobile torque method of testing according to claim 1, is characterized in that: in described step C, draw out ac-dc axis size of current and trajectory diagram and carry out as follows in host computer:
The correlation parameter of C1, typing driving motor for electric automobile;
C2, three-phase current and rotary speed data are imported to program;
C3, set up quadrature axis electric current, the data matrix of the relative position angle of direct-axis current and stator and rotor;
C4, calculate the relative position angle of stator and rotor by the rotating speed and the time data that gather;
C5, utilize the stator that four-step calculation goes out to obtain its corresponding sine and cosine value with the relative position angle of rotor;
C6, the relative position angle of passing through the above three-phase current obtaining and stator and rotor and sine thereof and cosine value calculate the ac-dc axis electric current of rotatable coordinate axis;
C7, draw the trajectory diagram of ac-dc axis electric current.
3. a kind of electric automobile torque method of testing according to claim 2, is characterized in that: in described step C2, three-phase current is transferred to host computer after by oscilloscope measurement.
4. a kind of electric automobile torque method of testing according to claim 3, is characterized in that: described oscilloscope measurement one phase current, and current data is transferred on host computer, by the synthetic other two-phase of host computer.
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| CN201010612183.4A CN102162759B (en) | 2010-12-29 | 2010-12-29 | Method and system for testing torque of electric automobile |
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| CN201010612183.4A CN102162759B (en) | 2010-12-29 | 2010-12-29 | Method and system for testing torque of electric automobile |
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| CN103499409B (en) * | 2013-08-27 | 2016-04-06 | 广州飞机维修工程有限公司 | A kind of Torque Measuring System of civil aircraft VBV fuel oil CD-ROM drive motor analogue simulation |
| CN103499446B (en) * | 2013-08-27 | 2015-11-25 | 广州飞机维修工程有限公司 | Reliability analogue simulation test system under the ultralow rotating speed of a kind of civil aircraft VBV fuel oil CD-ROM drive motor |
| CN103808444B (en) * | 2014-02-14 | 2017-01-11 | 奇瑞新能源汽车技术有限公司 | Measuring system for measuring cogging torque of permanent magnet synchronous motor |
| CN107782568A (en) * | 2017-10-23 | 2018-03-09 | 中国北方车辆研究所 | A kind of method of testing of crawler travel device power attenuation |
| CN109141702B (en) * | 2018-08-24 | 2021-03-23 | 智车优行科技（上海）有限公司 | Method and system for testing internal resistance of driving motor |
| CN109883589B (en) * | 2019-03-15 | 2020-10-27 | 中国汽车技术研究中心有限公司 | New energy automobile driving shaft torque testing device and method |
| CN111007381B (en) * | 2019-12-27 | 2022-03-29 | 东风航盛（武汉）汽车控制系统有限公司 | IGBT thermal state on-load voltage stress test system and method thereof |
| CN114252187A (en) * | 2021-12-15 | 2022-03-29 | 上海奥波智能科技有限公司 | Equipment, method, device and medium for testing motor pulsation torque |
| CN115213847B (en) * | 2022-08-10 | 2024-05-24 | 江苏东成工具科技有限公司 | Torque control method, torque control device and computer readable medium |
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| DE1473466A1 (en) * | 1964-04-10 | 1968-12-12 | Hofmann Maschf Geb | Device for continuous and automatic measurement of the performance of motor vehicles |
| EP0833138A1 (en) * | 1996-09-27 | 1998-04-01 | Jouan | Device for determining a resistive torque of a rotating equipment, control system for an electrical motor and parameter regulation for an associated centrifuge |
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Owner name: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SAIC CHERY AUTOMOBILE CO., LTD. Effective date: 20150701 |
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Effective date of registration: 20150701 Address after: 241000 Yijiang, Anhui Province, Jin Hua Road, No. 226, South Road, No. Patentee after: New-energy automobile Technology Co., Ltd. of Cherry Address before: 241000 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Patentee before: Saic Chery Automobile Co., Ltd. Effective date of registration: 20150701 Address after: 241000 Yijiang, Anhui Province, Jin Hua Road, No. 226, South Road, No. Patentee after: New-energy automobile Technology Co., Ltd. of Cherry Address before: 241000 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Patentee before: Saic Chery Automobile Co., Ltd. |
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Address after: 241000 No. 226 Jin Hua Nan Road, Yijiang hi tech Industrial Development Zone, Anhui, Wuhu Patentee after: Chery New Energy Automobile Co.,Ltd. Address before: No.226, South Huajin Road, Yijiang District, Wuhu City, Anhui Province Patentee before: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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