Vector control method of non-sinusoidal counter-electromotive-force surface AC magnetoelectric machine

Abstract

The invention provides a vector control method of a non-sinusoidal counter-electromotive-force surface AC magnetoelectric machine, belonging to the AC magnetoelectric machine speed regulating method. The speed regulating method comprises the steps of calculating to acquire the vector amplitude of a permanent magnetic linkage derivative and the relation curve between a phase and a vibrator electric angle according to relation curve between the permanent magnetic linkage derivative and the motor vibrator electric angle acquired by numerical calculation, experiments or identification, establishing a d'q'-axis coordinate system by taking the vector direction of the permanent magnetic linkage derivative as a q'-axis, controlling the current of a d'-axis to be 0 to orient the current vector direction to the vector direction of the permanent magnetic linkage derivative, and performing the cogging force (or torque) compensation by combining with relation curve between the cogging force (or torque) acquired by numerical calculation, experiments or identification and the vibrator electric angle to acquire unrippled thrust force (or torque) control having the maximum efficiency. The invention solves the problem that the thrust force (or torque) pulsation phenomenon exists in the traditional vector control method owing to the influence of the permanent magnetic linkage harmonic wave, cogging effect and the like, provides a high-performance speed regulating method of the non-sinusoidal counter-electromotive-force surface AC magnetoelectric machine, and is particularly applicable to the surface AC permanent magnet linear motor.

Description

technical field [0001] The invention belongs to a speed regulation method of an AC permanent magnet motor, and relates to a maximum efficiency ripple-free thrust (or torque) vector control method of a non-sinusoidal counter electromotive force surface type AC permanent magnet motor. The method is applicable to various surface type AC permanent magnet linear motors and rotary motors. Background technique [0002] AC permanent magnet motor is a high-performance, high-efficiency speed-regulating motor, which is mainly used in occasions with high control precision and high reliability, such as aerospace, CNC machine tools, machining centers, robots, electric vehicles, computer peripherals, etc. In addition, in daily life, there are more and more applications of AC permanent magnet motors. For example, household air conditioners use permanent magnet brushless DC motors with stepless speed regulation, which can automatically adjust to a suitable speed according to changes in room ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of thrust (or torque) pulsation in the traditional surface type AC permanent magnet motor vector control method due to the influence of permanent magnet flux harmonics, cogging effect, and end effect, and provides a non-sinusoidal inverter Electromotive force surface type AC permanent magnet motor vector control method, this method can obtain no ripple thrust (or torque), maximum efficiency control, suitable for surface type AC permanent magnet linear motor and rotary motor

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