电工技术学报  2019, Vol. 34 Issue (19): 3997-4005    DOI: 10.19595/j.cnki.1000-6753.tces.181103
电机与电器 |
高速无刷直流电机自寻优换相校正策略
施晓青, 王晓琳, 徐同兴, 顾聪
南京航空航天大学自动化学院 南京 211106
Self-Optimization Commutation Correction Strategy for High-Speed Brushless DC Motor
Shi Xiaoqing, Wang Xiaolin, Xu Tongxing, Gu Cong
School of Automation Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
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摘要 换相误差是影响高速永磁无刷直流电机系统性能的主要因素之一,众多学者已对换相误差模型及校正技术进行了广泛研究。该文指出相电流与换相误差呈非线性关系,当且仅当换相误差被完全补偿时相电流存在最小值。为达到换相误差的最优补偿效果,提出一种基于最小相电流追踪的自寻优换相校正策略,即仅以电机相电流作为反馈信号对换相补偿角自动寻优。这种自寻优换相校正策略既不依赖于任何电机参数,又能统一补偿因电机阻抗效应、采样延迟及控制回路延迟等不同因素导致的换相误差。同时,该策略不受限于无刷直流电机的位置检测方法、调制方式或反电动势波形是否理想等条件,实现简单,具有较强的适用性。最后通过仿真和实验验证了该策略的有效性和优越性。
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关键词 换相误差自寻优无刷直流电机换相校正    
Abstract:The commutation error is one of the main factors that degrades the performances of high-speed permanent magnet brushless DC motor(BLDCM), thus the commutation error models and correction strategies have attracted a great deal of attention. This paper presents that as the commutation error changes, the phase current is continuous derivable and has a minimum only when the commutation error is fully compensated. In order to achieve the optimal commutation correction effect, this paper proposes a self-optimization commutation correction strategy based on tracking the minimum phase current. Such strategy is not only independent from the motor parameters but also can uniformly compensate for the commutation errors caused by various factors such as impedance of the motor, sampling delay, control-loop delay and so on. In addition, this strategy is simple and has general applicability in that it is not restricted by the influence of rotor position detection methods, modulation modes or whether the back electromotive force waveform is ideal, etc. The effectiveness and superiority of the strategy are verified by simulations and experiments.
Key wordsCommutation error    self-optimization    brushless DC motor    commutation correction   
收稿日期: 2018-06-25      出版日期: 2019-10-12
PACS: TM351  
通讯作者: 王晓琳 女,1976年生,教授,博士生导师,研究方向为永磁电机及其驱动技术,无轴承磁悬浮技术等。E-mail:wangxl@nuaa.edu.cn   
作者简介: 施晓青 女,1993年生,硕士,研究方向为永磁电机控制。E-mail:xqshi10@outlook.com
引用本文:   
施晓青, 王晓琳, 徐同兴, 顾聪. 高速无刷直流电机自寻优换相校正策略[J]. 电工技术学报, 2019, 34(19): 3997-4005. Shi Xiaoqing, Wang Xiaolin, Xu Tongxing, Gu Cong. Self-Optimization Commutation Correction Strategy for High-Speed Brushless DC Motor. Transactions of China Electrotechnical Society, 2019, 34(19): 3997-4005.
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