电工技术学报  2022, Vol. 37 Issue (2): 355-367    DOI: 10.19595/j.cnki.1000-6753.tces.200839
电机及其系统 |
稳态性能改善的双三相永磁电机直接转矩控制
黄林森, 赵文祥, 吉敬华, 薛瑞
江苏大学电气信息工程学院 镇江 212013
Direct Torque Control for Dual Three-Phase Permanent-Magnet Machine with Improved Steady-State Performance
Huang Linsen, Zhao Wenxiang, Ji Jinghua, Xue Rui
School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013 China
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摘要 传统直接转矩控制的双三相永磁电机存在电流谐波含量高、磁链脉动和转矩脉动大的缺点。为改善双三相永磁电机稳态性能,该文提出虚拟电压矢量集的新型占空比调制直接转矩控制。首先,电压矢量集由传统的12个基本电压矢量拓展到24个虚拟电压矢量,通过虚拟电压矢量实现对谐波平面的控制,减小谐波电流;再通过增加矢量个数减小磁链的控制误差,达到降低磁链脉动的目的。其次,分别定义用于动态工况和稳态工况的开关表及占空比的计算方法,稳态工况的开关表和占空比计算可减小稳态时的转矩脉动,动态工况的开关表和占空比计算用于保证系统的动态响应。最后,通过实验验证所提控制算法的可行性。
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黄林森
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吉敬华
薛瑞
关键词 直接转矩控制双三相永磁电机占空比调制虚拟电压矢量转矩脉动电流谐波    
Abstract:The classical direct torque control (DTC) strategy-controlled dual three-phase permanent-magnet machine usually suffers from high harmonic current, flux ripple and torque ripple. To improve the steady state performance of DTC, a duty ratio modulation direct torque control (DRM-DTC) strategy based on virtual voltage vector set is proposed in this paper. Firstly, the voltage vector set is extended from 12 basic voltage vectors to 24 virtual voltage vectors. The harmonic plane is controlled by the virtual voltage vector, and the harmonic current is suppressed. By increasing the number of voltage vectors, the control of the flux is more accurate and the flux ripple can be reduced. Moreover, the switching table and duty cycle calculation method for dynamic and steady state conditions are defined. Subsequently, the torque ripple in steady state can be reduced, and the dynamic performance can be ensured, respectively. Experiments on the prototype machine are carried out to verify the feasibility of the proposed DRM-DTC strategy.
Key wordsDirect torque control    dual three-phase permanent-magnet machine    duty ratio modulation    virtual voltage vectors    torque ripple    harmonic current   
收稿日期: 2020-07-10     
PACS: TM351  
基金资助:国家杰出青年科学基金(52025073)和江苏省重点研发计划(BE2018107)资助项目
通讯作者: 赵文祥 男,1976年生,教授,博士生导师,研究方向为电机设计与控制。E-mail: zwx@ujs.edu.cn   
作者简介: 黄林森 男,1990年生,博士研究生,研究方向为电机驱动与控制。E-mail: linsen.huang@qq.com
引用本文:   
黄林森, 赵文祥, 吉敬华, 薛瑞. 稳态性能改善的双三相永磁电机直接转矩控制[J]. 电工技术学报, 2022, 37(2): 355-367. Huang Linsen, Zhao Wenxiang, Ji Jinghua, Xue Rui. Direct Torque Control for Dual Three-Phase Permanent-Magnet Machine with Improved Steady-State Performance. Transactions of China Electrotechnical Society, 2022, 37(2): 355-367.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.200839          https://dgjsxb.ces-transaction.com/CN/Y2022/V37/I2/355