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
CN110703091AActive Publication Date: 2020-01-17HARBIN INST OF TECH AT WEIHAI +1
15 Cites 12 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH AT WEIHAI
Publication Date
2020-01-17

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More