电气传动2017，Vol.47Issue(12)：3-8,6.DOI:10.19457/j.1001-2095.20171201
不对称永磁同步电机级联直接转矩控制策略
Cascade Direct Torque Control Strategy for Asymmetric Permanent Magnet Synchronous Motor
摘要
Abstract
The parasitic impedance of permanent magnet synchronous motor will result in the unbalance of the three-phase current of the motor,thus the motor torque ripple is increased. To mitigate the problem,the unbalanced back electromotive force of the motor was analyzed and deduced,the torque harmonic expression was solved firstly, then a cascade direct torque control strategy for torque ripple optimization of asymmetric permanent magnet synchronous motor was presented. Theα,βcomponents of the motor stator flux and current were extracted to generate the positive and negative sequence components of the reference voltage vector. Then the positive and negative sequence components of the reference voltage vector were synthesized ,which would build the corrected reference voltage vector for space vector modulation algorithm. At the same time ,the conventional PI regulator was improved into a composite PIR regulator combined with a PI regulator and a resonant controller. Finally ,the steady-state and dynamic test results verify the effectiveness of the proposed control strategy.关键词
永磁同步电机/不对称/转矩脉动/直接转矩控制/负序矢量Key words
permanent magnet synchronous motor(PMSM)/asymmetric/torque ripple/direct torque control (DTC)/negative sequence vector分类
信息技术与安全科学引用本文复制引用
郭宗莲,孙玉萍..不对称永磁同步电机级联直接转矩控制策略[J].电气传动,2017,47(12):3-8,6.基金项目
高性能土木工程材料国家重点实验室开放基金(2016CEM003) （2016CEM003）
