Asymmetric fault diagnosis method and system for stator of permanent magnet synchronous motor
A permanent magnet synchronous motor and fault diagnosis technology, which is applied in the field of drive motor state detection and fault diagnosis, can solve the problems of reducing the accuracy of fault judgment, negative sequence component research, and different interference from external signals, etc., to achieve high reliability and Practical significance, short sampling time, and wide application range
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[0035] The embodiments of the present invention will be described below in conjunction with the accompanying drawings of the specification.
[0036] The present invention designs a permanent magnet synchronous motor stator asymmetry fault diagnosis system, such as figure 1 As shown, it includes a permanent magnet synchronous motor 1, a Hall current and voltage sensor 2, a signal conditioning circuit 3, a data acquisition instrument 4, a fault diagnosis center 5, and a vehicle display circuit 6. The stator three-phase power lines of the permanent magnet synchronous motor are respectively Passing through the openings of the three Hall current sensors, the stator three-phase power line of the permanent magnet synchronous motor is connected in parallel with the three Hall voltage sensors 2, and the output terminals of the Hall current and voltage sensors 2 are connected in series to the signal conditioning circuit. 3. The Hall current and voltage sensor 2 is used to detect the stator ...
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