Control method for driving permanent magnet synchronous motor base on magnetic field orthotropic control

Abstract

The invention discloses a method for driving and controlling a permasyn motor based on the magnetic field orthotropic control. The position bias of a stator magnetic pole and a rotor magnetic electrode is obtained by a rotor magnetic pole position signal provided by a position encoder arranged inside the permasyn motor; the bias is set into orthogonality by 90 degrees to form the closed loop control so as to ensure that the two magnetic fields are in orthogonality; on the base, the vector is controlled to be unfolded on a stator current system of polar coordinates so as to directly control the torque of the permasyn motor by controlling the magnetic field of the stator, and the magnetic field of the rotor is constant. The method saves system resources of the basic magnetic field directional vector control strategy, simplifies the system structure and lowers the cost under the application situation with low requirement, lowers the system expenditure in the servodrive control with high requirement, and gives the control resources to the complicated control, thereby improving the control performance.

Description

technical field [0001] The present invention relates to the drive control method of the motor in the field of servo drive control, in particular to the drive control method of the permanent magnet synchronous motor based on the orthogonal control of the magnetic field. Cross, and use polar coordinates to control the torque of the motor. Background technique [0002] At present, the drive control of permanent magnet synchronous motors at home and abroad mostly adopts the field-oriented vector control strategy. The idea of ​​vector control originated from the "field-oriented control principle of induction motor" proposed by F. Blaschke and others in Germany for asynchronous motors in the 1970s. The field oriented vector control transforms the stator three-phase current i in the three-phase static coordinate system A i B and i C Through CLARK (3 / 2 transformation, the three-phase current i A i B and i C Transformed into two-phase current i α i β ) transformation, which ...

AI Technical Summary

Problems solved by technology

However, the mutual transformation operations of vectors between coordinate systems, such as CLARK, inverse CLARK, PARK and inverse PARK transformation, etc., require a lot of calculations, occupy a lot of system resources, and require high processing power of the controller

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