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
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[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.
[0033] In the present invention, the stator current of the three-phase winding of the motor is firstly collected, and the collected current signal is subjected to noise reduction processing and feature quantity extraction by using the method of wavelet transformation, and finally the extracted feature quantity is used as the input of the support vector machine system to diagnose the motor stator. Asymmetric faults and judge the severity of faults.
[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0035] The asymmetric fault of the stator of the permanent magnet s...
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