基于占空比调制的五相容错永磁游标电机直接转矩控制

doi:10.19595/j.cnki.1000-6753.tces.190446

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摘要采用传统直接转矩控制策略的五相容错永磁游标电机,存在转矩脉动过大、定子电流谐波分量较高等问题。提出一种基于占空比调制技术的直接转矩控制策略。根据每个采样周期的转矩和磁链误差,运用一种简单有效的求解方法,计算出有效电压矢量作用的最佳时间。既能保持电机优良的动态响应性能,也能有效减小转矩和磁链脉动,并降低定子电流的3次谐波含量。与此同时,该策略保持了直接转矩控制运算方便和结构简洁的优点。实验结果证明理论分析的正确性及所提控制策略的可行性。

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	陈浩
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	赵文祥
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关键词 ：五相电机, 容错永磁游标电机, 直接转矩控制, 占空比调制, 转矩脉动抑制

Abstract：When the conventional direct torque control (DTC) is adopted, a five-phase fault-tolerant permanent magnet vernier motor suffers from high torque ripple and current harmonic components. An improved direct torque control strategy based on duty cycle modulation is proposed. It uses a simple and effective solution to calculate the optimal time for the effective voltage vector, which is based on the torque and flux linkage error of each sampling period. This strategy not only maintains the good dynamic response of the motor, but also effectively reduces torque and flux pulsation and reduces the third harmonic content of the phase current. At the same time, this strategy remains the inherent merits of simple operation and simple structure. The experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed control strategy.

Key words： Five-phase motor fault-tolerant permanent magnet vernier motor direct torque control duty cycle modulation torque ripple suppression

收稿日期: 2019-04-19 出版日期: 2020-03-12

PACS:

TM351

基金资助:国家自然科学基金(51777090)和江苏省重点研发计划(BE2018107)资助项目

通讯作者: 和阳男,1987年生,博士,副教授,研究方向永磁电机的驱动与控制等。E-mail: hy.87@qq.com。

作者简介: 陈浩男,1995年生,硕士,研究方向为永磁电机驱动及控制。E-mail: 18852850028@qq.com。

引用本文:

陈浩, 和阳, 赵文祥, 许德志. 基于占空比调制的五相容错永磁游标电机直接转矩控制[J]. 电工技术学报, 2020, 35(5): 1055-1064. Chen Hao, He Yang, Zhao Wenxiang, Xu Dezhi. Direct Torque Control of Five-Phase Fault-Tolerant Permanent Magnet Vernier Motor Based on Duty Cycle Modulation. Transactions of China Electrotechnical Society, 2020, 35(5): 1055-1064.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190446 https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I5/1055

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