Rotor position detecting method for permanent magnetic brushless direct current motor (DC motor)
A permanent magnet brushless DC and rotor position detection technology, applied in the detection field, can solve the problems of reduced motor operation reliability, reduced sensor reliability, easy introduction of interference by connecting lines, etc., and achieves high-precision results
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[0017] The present invention will be further described below in conjunction with an embodiment.
[0018] A method for detecting the rotor position of a permanent magnet brushless DC motor of the present invention uses a state observer and a Kalman filter to detect the rotor position of the permanent magnet brushless DC motor, wherein,
[0019] The state observer observes the speed and torque fluctuations of the motor separately. During the observation, a mathematical model of the motor that is convenient for linearization is established for observation; when the speed and torque fluctuations of the motor are observed through the state observer, the state observer observes Stability is achieved by configuring the poles of the observer. When using the state observer, setting it through the linear observer can reduce the dimension of the state observer and greatly reduce the amount of calculation.
[0020] Kalman filter adopts a linearization method around the latest state estimate, tha...
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