Fault tolerant control method for double salient pole permanent magnet motor
A permanent magnet motor and fault-tolerant control technology, which is applied in motor control, AC motor control, motor parameter estimation/correction, etc., can solve problems not related to intelligent fault-tolerant drive technology, etc. The effect of high reliability and simple control method
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[0022] The fault-tolerant control method proposed by the present invention adopts three-phase square wave control when the double salient permanent magnet motor is in normal operation state; when a phase loss fault occurs, the controller adopts a fault-tolerant control strategy, the motor adopts two-phase sine wave control, and the system Operation with failure. The specific implementation steps are:
[0023] 1. Establish the torque equation of the doubly salient permanent magnet motor under three-phase square wave control
[0024] The 12 / 8-pole doubly salient permanent magnet motor of the straight-slot rotor has the back EMF of the trapezoidal wave. From the traditional control method, the square wave control should be used. Under normal operation, the electromagnetic output torque of the three-phase double salient permanent magnet motor controlled by 120° square wave can be expressed as:
[0025] T N _ ...
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