Segmented control method of permanent magnetic linkages of stator permanent magnetic type memory motor

Abstract

The invention discloses a segmented control method of permanent magnetic linkages of a stator permanent magnetic type memory motor. The method comprises following steps of S1, according to magnetization states of a permanent magnet, selecting k+1 permanent magnetic linkages including phipm (if0), phipm (if1), ..., phipm (if(k-1)), and phipm (ifk), wherein the phipm (if(k-1)) is larger than the phipm (ifj), and 1<=j<=k, calculating rotation speed omegaej according to direct current bus voltage Udc, the rated phase current In, and the quadrature axis inductance Lq(j) and the permanent magnetic linkage phipm (ifj) of the jth kind of magnetization state, and storing the permanent magnetic linkages of phipm (if0), phipm (if1) ..., phipm (if(k-1)), and phipm (ifk) and corresponding rotation speeds of omegae0, omegae1, ..., omegae(k-1), and omegaek into a speed-permanent magnetic linkage table, wherein the if is the magnetic field adjusting pulse; and S2, when the given rotation speed shown in the description meets the condition shown in the description, judging a magnetic field adjusting process of the permanent magnet by comparing the permanent magnetic linkage phipmo(if) and the permanent magnetic linkage phipm(ifj) corresponding to the rotation speed omegaej observed by the permanent magnetic linkage observer. According to the invention, speed adjusting range of the motor is enlarged, and effects on permanent magnetic linkage calculation accuracy imposed by motor parameters are reduced.

Description

Technical field [0001] The present invention relates to the technical field of electric transmission, in particular to a method for segmented control of permanent magnet flux of a stator permanent magnet type memory motor. Background technique [0002] The rotor permanent magnet type memory motor uses armature windings for magnetization and drive control, saving space and materials. However, the problem of non-decoupling of drive and magnetism control increases the difficulty of vector control. At the same time, the dynamic changes of the position of the AlNiCo permanent magnet and the armature winding may affect the magnetization effect of the permanent magnet. In order to overcome the shortcomings of the rotor permanent magnet memory motor, researchers at home and abroad have proposed the stator permanent magnet memory motor topology. The motor has two sets of windings, magnetism and armature, which can be respectively controlled by magnetism and drive, which reduces the diff...

AI Technical Summary

Problems solved by technology

The former is greatly affected by the motor parameters, and the calculated permanent magnet flux linkage accuracy is low

The latter can only obtain the maximum and minimum values ​​of permanent magnet flux linkage in a small range of permanent magnet flux linkage, so the optimal control of permanent magnet flux linkage cannot be realized in the full speed range

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