Control method for linear induction motor

Abstract

This invention discloses one line sensor motor control method, which gets line sensor motor initial magnetic linkage real value and linkage rate according to the input voltage of line sensor motor, wherein, it gets line sensor motor stator magnetic linkage range reference value and frequency value through collecting line sensor motor real speed; then it combines initial linkage aim shape to determine property motor initial voltage space vector and linkage frequency for the reference values.

Description

technical field [0001] The invention mainly relates to the field of linear induction motors, in particular to a control method of linear induction motors, but can also be used for the control of other motors. Background technique [0002] The basic principle of linear induction motor and the structure of its equivalent circuit are basically the same as those of rotary induction motor. But because of its many unique features, it is much more difficult to control than a rotating motor. This is mainly manifested in the following aspects: [0003] A: The influence of the edge effect. In particular, the dynamic longitudinal edge effect weakens the air gap flux linkage at medium and high speeds, resulting in a decrease in the excitation inductance of the motor, which greatly reduces the efficiency of the linear motor. And it is difficult to accurately predict the amount of flux linkage weakening, especially in real-time control systems. [0004] B: Variation of air gap size. ...

AI Technical Summary

Problems solved by technology

But there are many efficiency factors that are not considered, such as vector control, etc., which are suitable for micro linear motor control

In addition, there are also many complex algorithms such as sliding mode control and self-adaptive control, but most of them stay in theoretical exploration and have not been used in practice.

And the general control is complicated and difficult to realize

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