感应电机弱磁区转矩输出与电流动态性同步提升控制策略  

Induction Motor Field-weakening Control Strategy for Improvement of Torque Output and Current Dynamic

作　　者：张旭 王勃[1] 于泳[1] 张静 徐殿国[1] ZHANG Xu;WANG Bo;YU Yong;ZHANG Jing;XU Dianguo(School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市150001

出　　处：《中国电机工程学报》2023年第10期3986-3994,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52177030);黑龙江省自然科学基金项目(YQ2020E018);《台达电力电子科教发展计划》资助项目(DREG2021007)。

摘　　要：弱磁控制技术是感应电机高速驱动的核心技术之一,传统弱磁方案存在直流母线电压利用率低与电压饱和问题,造成弱磁区感应电机输出转矩不足与电流动态性变差的问题。为提升弱磁区电压利用率并抑制电压饱和,同步提升弱磁区输出转矩与电流动态性,文中提出优化的六边形电压拓展策略。首先,设计随电压矢量旋转实时更新的六边形电压给定以实现六边形电压拓展,并定量分析六边形拓展电压下的最大转矩提升;进一步分析六边形电压运行情况下,零电压裕量状态造成的电流动态性问题,提出励磁电流优先控制的优化方案。最后,通过对比实验验证所提出方法的有效性。The field-weakening(FW)control technology is one of the core drive technologies for high-speed drive of induction motors(IMs).The conventional FW methods have the problems of low DC-link voltage utilization and voltage saturation,resulting in the insufficient output torque and poor current dynamics of the IM in FW region.To improve the voltage utilization and suppress the voltage saturation in FW region,this paper proposes an optimized hexagon voltage extension scheme.The hexagon voltage reference is designed to update in real time with the rotation voltage vector.Then,the maximum torque increase with the hexagon voltage was quantitatively analyzed.Moreover,the current dynamic problem was analyzed with zero voltage margin under the hexagonal voltage.On this basis,the dynamic optimization scheme is proposed with the priority control of the field current.The effectiveness of the proposed method is verified through comparative experiments.

关 键 词：感应电机 弱磁控制 电流动态性 电压拓展 最大转矩提升 

分 类 号：TM346[电气工程—电机]