考虑逆变器非理想特性的永磁电机MTPA控制策略  

MTPA Control Strategy for PMSM Considering Inverter Non-ideal Characteristics

作　　者：周金伟 丁大尉 姜学想 任兆亭 李希志 ZHOU Jinwei;DING Dawei;JIANG Xuexiang;REN Zhaoting;LI Xizhi(Qingdao Hisense-Hitachi Air-conditioning System Co.,Ltd.,Kawasaki 213-0012,Tokyo,Japan;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;Qingdao Hisense-Hitachi Air-conditioning System Co.,Ltd.,Qingdao 266400,Shandong,China)

机构地区：[1]青岛海信日立空调系统有限公司,东京新川崎213-0012 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001 [3]青岛海信日立空调系统有限公司,山东青岛266400

出　　处：《电气传动》2024年第6期3-8,共6页Electric Drive

基　　金：国家自然科学基金(52207042)。

摘　　要：最大转矩电流比(MTPA)控制可以降低铜损,进而有效提高电机效率,适用于空调永磁压缩机系统,但受逆变器非理想特性的影响,最优电流矢量角追踪精度存在下降问题。研究逆变器非理想特性对虚拟直流信号注入MTPA方法的负面影响并给出补偿方法。针对控制系统数字延迟问题,根据系统采样时间对电流矢量角追踪过程中的电压信息进行校正;此外,采用基于饱和函数的死区补偿方法,降低逆变器非线性引起的电压误差。实验结果表明,所研究的逆变器非理想特性补偿方法提高了最优电流矢量角追踪的准确性。Maximum torque per ampere(MTPA)control can effectively improve system efficiency through reducing copper loss,which is suitable for air conditioning permanent magnet compressor system.However,due to the inverter non-ideal characteristics,the tracking accuracy of the optimal current vector angle decreases.The negative influence of inverter non-ideal characteristics on virtual direct signal injection based MTPA control and the compensation method were studied.Aiming at the digital delay issue of the control system,the voltage information in the process of current vector angle tracking was corrected according to the system sampling time.In addition,the saturation function based dead-time compensation method was utilized to reduce the voltage error caused by the inverter nonlinearity.Experimental results show that the compensation method of inverter non-ideal characteristics improves the tracking accuracy of the optimal current vector angle.

关 键 词：内置式永磁同步电机 MTPA控制 虚拟信号注入 逆变器非理想特性 

分 类 号：TP273.3[自动化与计算机技术—检测技术与自动化装置]