电工技术学报  2022, Vol. 37 Issue (7): 1644-1653    DOI: 10.19595/j.cnki.1000-6753.tces.211481
“高效节能及智能化电机系统”专题 |
基于重构电压矢量的共直流母线型开绕组永磁同步电机改进直接转矩控制
孙丹, 赵琛, 柯伟煌, 王铭泽, 年珩
浙江大学电气工程学院 杭州 310027
Reconstructed Voltage Vector Based Improved Direct Torque Control Strategy for Open-Winding Permanent Magnet Synchronous Motor with Common DC Bus
Sun Dan, Zhao Chen, Ke Weihuang, Wang Mingze, Nian Heng
College of Electrical Engineering Zhejiang University Hangzhou 310027 China
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摘要 针对共直流母线型开绕组永磁同步电机(OW-PMSM)基本电压矢量丰富、存在零序回路的特性,该文提出两种基于重构电压矢量的共直流母线型开绕组永磁同步电机改进直接转矩控制策略。为充分利用OW-PMSM所产生的电压矢量,定义19个重构电压矢量并基于此改进零序电流抑制方法,扩大直接转矩控制的备选电压矢量范围。根据重构矢量数量多、幅值不同的特点,将五位转矩滞环控制器引入直接转矩控制中,实现电机转矩脉动的抑制。针对滞环控制器控制精度有限等问题,提出无滞环控制器的改进直接转矩控制策略,定义一种新的区域划分方式并建立重构电压矢量选择表,通过对参考电压矢量的定位实现重构电压矢量的精确选择。实验结果验证了所提控制策略的可行性和优越性。
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孙丹
赵琛
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王铭泽
年珩
关键词 开绕组永磁同步电机共直流母线直接转矩控制零序电流抑制    
Abstract:Aiming at the characteristics of open-winding permanent magnet synchronous motor (OW-PMSM) with common DC bus, such as abundant basic voltage vectors and the existence zero sequence circuit, this paper proposed an improved direct torque control strategy based on the reconstructed voltage vector for OW-PMSM with common DC bus. In order to make full use of the voltage vectors generated by OW-PMSM, 19 reconstructed voltage vectors were defined. And based on this, the zero-sequence current suppression method was improved to expand the range of candidate voltage vectors for direct torque control (DTC). According to the characteristics of reconstructed vectors, such as abundant numbers and different amplitudes, a five-bit torque hysteresis controller was introduced into DTC to suppress the torque ripple. Aiming at the problem of limited control precision of hysteresis controller, a new region division method was defined and the corresponding reconstructed voltage vector selection table was established. By locating the reference voltage vector, the reconstructed voltage vector could be selected accurately. The experimental results verify the feasibility and superiority of the proposed control strategy.
Key wordsOpen winding permanent magnet synchronous motor    common DC bus    direct torque control    zero sequence current suppression   
收稿日期: 2021-09-18     
PACS: TM351  
基金资助:国家自然科学基金资助项目(51877197)
通讯作者: 孙丹 女, 1975年生, 教授, 博士生导师, 研究方向为交流电机高性能控制策略和双馈风力发电技术。E-mail:sundan@zju.edu.cn   
作者简介: 赵琛 男, 1997年生, 博士研究生, 研究方向为交流电机高性能控制策略和新能源发电并网技术。 E-mail:eezhaochen@zju.edu.cn
引用本文:   
孙丹, 赵琛, 柯伟煌, 王铭泽, 年珩. 基于重构电压矢量的共直流母线型开绕组永磁同步电机改进直接转矩控制[J]. 电工技术学报, 2022, 37(7): 1644-1653. Sun Dan, Zhao Chen, Ke Weihuang, Wang Mingze, Nian Heng. Reconstructed Voltage Vector Based Improved Direct Torque Control Strategy for Open-Winding Permanent Magnet Synchronous Motor with Common DC Bus. Transactions of China Electrotechnical Society, 2022, 37(7): 1644-1653.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.211481          https://dgjsxb.ces-transaction.com/CN/Y2022/V37/I7/1644