Linear motor control method, recording medium and system

Abstract

The invention belongs to the technical field of motor control, and particularly relates to a linear motor control method, which comprises the following steps of: acquiring three-phase current of a motor in real time through a sensor and converting to a DQ coordinate system to obtain sampling current; observation values of the same kind of current are obtained through an active disturbance rejection observer at the same time to serve as observation current; and calculating the time delay of the sampling current based on a current time sequence obtained after Fourier transform of the observation current and the sampling current and a rotor position relation, and converting the time delay into a multiple of a control period, namely, the step number in a control algorithm, so as to gradually compensate a predicted current in model prediction control. According to the method, the total time delay existing in the system can be accurately identified, the calculation amount of a value function is greatly reduced through iterative optimization, the complexity of model prediction control is reduced, and the method is suitable for speed control of the linear motor. The invention also provides a non-transitory readable recording medium storing the program of the method and a system comprising the medium, and the program can be called through a processing circuit to execute the method.

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