Phase-amplitude coordinated motor operation control method based on discrete current vector

Abstract

The motor operation control method based on the phase-amplitude coordination of discrete current vectors in the present invention is characterized in that the control method is based on three different control requirements for phase-amplitude coordination control in the motor operation process: the first one is to maximize the output torque In the second type, the minimum torque ripple is the target, and in the third type, the minimum position deviation is the target, and the phase angle and amplitude of the current vector are coordinated and controlled respectively. The devices used in this control method include phase-amplitude coordination Control module, current control module, power circuit, motor, position detection module and current detection module; one end of the phase-amplitude coordination control module is connected to the current control module, and the other end is connected to the position detection module; the signal control end of the current control module and the power circuit The output end of the power circuit is connected to the motor through wires, and the wires pass through the current detection module, and the current detection module is connected to the current control module, and the position detection module and the motor are coaxially installed.

Description

technical field [0001] The technical solution of the present invention relates to a motor control technology, in particular to a motor operation control method based on phase amplitude coordination of discrete current vectors. Background technique [0002] AC stepping drive control is a control strategy that changes the continuous operation of the motor into stepping operation, so as to obtain the motor's stepping direct drive speed regulation, micro-step positioning and other operating modes. It has been used in asynchronous motors, synchronous motors and switched reluctance applied to motors. The technique of AC stepping is to divide the continuous current of the motor into discrete steps b H Equal step distances disperse into ladder wave currents, taking a three-phase motor as an example, formula (1): [0003] [0004] where k=0,1,...,b H -1, I is the current amplitude of each phase. Then obtain a spatially discrete step magnetomotive force (current vector), thereb...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a motor operation control method based on discrete current vector phase-amplitude coordination. The motor operation control method is based on AC step control, and on the basis of discrete current vector control with positioning characteristics, According to different operating conditions and different control objectives of the motor, a phase-by-stage coordinated control strategy of current vector phase and amplitude is proposed. By coordinating the discrete current vector amplitude and phase, that is, the step of calculating the discrete current amplitude and phase The improved torque characteristics are achieved, and the defects of large speed overshoot, excessive torque ripple, long positioning time and low positioning accuracy are overcome during the entire operation of the motor.

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