Electric vehicle permanent-magnet synchronous motor stator asymmetry fault diagnosis method

A permanent magnet synchronous motor and electric vehicle technology, applied in the field of drive motor state detection and fault diagnosis, can solve problems such as stator asymmetry, motor asymmetry, frequent operation, etc., to increase operation reliability, ensure operation safety, and apply wide range of effects
CN106483459AInactive Publication Date: 2017-03-08HOHAI UNIV
5 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HOHAI UNIV
Publication Date
2017-03-08
Estimated Expiration
Not applicable · inactive patent

Smart Images

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

Abstract

The invention discloses an electric vehicle permanent-magnet synchronous motor stator asymmetry fault diagnosis method. Fault diagnosis on a permanent-magnet synchronous motor is carried out and the severity of a fault occurring in the motor is determined by fusing wavelet transform and a support vector machine system. A faulty resistor is connected in series to any phase to form a faulty phase; a motor stator three-phase winding current signal is collected; the collected current signal is processed by means of wavelet de-noising, and the characteristic quantity of the processed signal is extracted; the extracted characteristic quantity is input to a support vector machine system, and the output of the support vector machine system is set; and finally, the stator asymmetry fault of the permanent-magnet synchronous motor is diagnosed, and the severity of the stator asymmetry fault is determined. The electric vehicle permanent-magnet synchronous motor stator asymmetry fault diagnosis method of the invention has the advantages of accurate and effective diagnosis result, high diagnosis accuracy, and high operability.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a fault diagnosis method for an asymmetrical stator of a permanent magnet synchronous motor of an electric vehicle, and belongs to the technical field of state detection and fault diagnosis of a driving motor. Background technique

[0002] The driving motor is the core equipment of electric vehicles and the source of power for vehicles. Its reliability directly affects the driving safety of electric vehicles. Compared with traditional electric excitation motors, permanent magnet synchronous motors are Small size, compact structure, reliable operation, low noise and other characteristics, in line with the best application indicators of electric vehicle drive motors, is the best choice for electric vehicle drive motors, not only that, its application range is extremely wide, almost throughout aerospace, military industry , automotive industry, industrial and agricultural production and various fields of daily life.

[0003] The ...

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