CPC H02P 23/14 (2013.01) [H02P 2207/05 (2013.01)] | 13 Claims |
1. A method for controlling a synchronous motor using a variable speed drive, the motor comprising a permanent magnet rotor generating a magnetic flux, the method comprising:
when the motor is at rest, applying a predefined electrical command signal to the motor;
estimating a motor speed in response to the applying of the predefined electrical command signal;
iteratively adapting a value of the predefined electrical command signal as a function of an updated motor speed estimation at least until reaching a desired estimated motor speed that indicates that the motor is operating in a stable manner;
waiting from when the predefined electrical command signal is applied when the motor is still at rest until reaching the desired estimated motor speed;
in response to reaching the desired estimated motor speed, estimating a parameter related to the magnetic flux of the permanent magnet rotor, wherein the parameter is the magnetic flux of the permanent magnet rotor;
recording the estimated parameter; and
taking the recorded estimated parameter into account for driving the synchronous motor.
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