Method for detecting static eccentric fault of built-in permanent magnet synchronous motor for electric vehicle

A permanent magnet synchronous motor, static eccentricity technology, applied in the direction of motor generator testing, using electrical devices, neural learning methods, etc., can solve the problems of difficult mass production detection, complex detection, difficult operation, etc., to achieve simple operation and detection accuracy. The effect of high and high practical value

Active Publication Date: 2020-01-17
HARBIN INST OF TECH AT WEIHAI +1
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Problems solved by technology

[0009] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art such as complex detection, high cost, difficult operation, and difficulty in mass production detec

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  • Method for detecting static eccentric fault of built-in permanent magnet synchronous motor for electric vehicle
  • Method for detecting static eccentric fault of built-in permanent magnet synchronous motor for electric vehicle
  • Method for detecting static eccentric fault of built-in permanent magnet synchronous motor for electric vehicle

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] A V-type built-in permanent magnet synchronous motor for electric vehicles with 8 poles and 48 slots and a rated speed of 5100rpm is the permanent magnet motor to be tested, and the whole process detection is carried out according to the method of the present invention.

[0057] like figure 1 As shown, it is a schematic diagram of a test bench for no-load back electromotive force of a built-in permanent magnet synchronous motor. The torque drives the measured permanent magnet motor 7 to rotate through the shaft coupling 4 to reach the rated speed. Collect the no-load back EMF of four unit motors, and connect the voltage test lines of each phase of each unit motor to the data acquisition and analysis unit 9 through the junction box 8. 5 is the bracket and 6 is the bearing seat, which is used for fixed support. The whole test is in It...

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Abstract

The invention provides a method for detecting a static eccentric fault of a built-in permanent magnet synchronous motor for an electric vehicle, and relates to a motor test method. The steps are as follows: determining the number of unit motors in the permanent magnet motor; setting winding voltage test lines of the unit motors; testing a no-load counter electromotive force of each phase of each unit motor; extracting a maximum or minimum value of the no-load counter electromotive force of each phase of each unit motor, figuring out an average value of the maximum or minimum values of the no-load counter electromotive forces of various phases of various unit motors, and calculating a distortion rate delta of each unit motor; if delta is equal to 0, indicating that no static eccentricity occurs; if delta is not equal to 0, testing known standard motors with different eccentricity ratios, obtaining a corresponding relationship between the distortion rate of each unit motor and a static eccentric circumferential angle, and establishing a data prediction model; and importing the delta into the established data prediction model to obtain the static eccentric circumferential angle and the static eccentricity ratio of a permanent magnet motor to be tested. The method provided by the invention has the advantages of simple principle, convenient use, higher versatility and high accuracy.

Description

technical field [0001] The invention relates to a detection method for static eccentric faults of built-in permanent magnet synchronous motors, more precisely, it is suitable for detecting static eccentric faults of all permanent magnet synchronous motors. Background technique [0002] The built-in permanent magnet synchronous motor has the advantages of high efficiency, high torque density, strong anti-demagnetization ability, good magnetic weakening performance, and wide speed range, and has been widely used in the field of electric vehicles. Due to the influence of factors such as motor manufacturing and installation errors, bearing wear, and electric vehicles under the influence of harsh operating conditions and obvious load changes, the stator and rotor of the motor may be eccentric. Among them, the rotation center of the rotor is fixed, and the geometric center of the stator is offset, resulting in uneven circumferential distribution of the air gap, which is static ecc...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01B7/312G06N3/04G06N3/08
CPCG01R31/34G01B7/312G06N3/084G06N3/045
Inventor 马琮淦王普威赵慧超王金昊王宇尹相睿卢炳武柴之龙郭守仑林展汐孙明冲崔洪玮张星星
Owner HARBIN INST OF TECH AT WEIHAI
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