压缩机用高速永磁同步电机新型弱磁控制研究  

Research on New Field Weakening Control of High Speed Permanent Magnet Synchronous Motor for Compressor

作　　者：李燕 LI Yan(GREE Electric Appliances,Inc.of Zhuhai,Zhuhai 519070,China;Key Laboratory of High-Speed Energy-Saving Motor System Enterprises in Guangdong Province,Zhuhai 519070,China)

机构地区：[1]珠海格力电器股份有限公司,珠海519070 [2]广东省高速节能电机系统企业重点实验室,珠海519070

出　　处：《微特电机》2023年第11期46-51,58,共7页Small & Special Electrical Machines

摘　　要：弱磁是高速永磁同步电机提升调速能力的有效措施,常用的电压反馈弱磁控制策略下,控制系统中包含两个电流调节环,交直轴电流耦合会随转速上升而增强,导致高速驱动控制性能变差,严重时甚至引发系统失稳。针对该问题,结合压缩机电机的负载特性,提出一种基于电压限幅的新型单电流弱磁控制策略,通过对q轴电压进行动态限幅,在一个控制拓扑下实现了中低速弱磁时双电流调节模式及高速弱磁时单电流调节模式的自然过渡。仿真及实验结果验证了该方法的有效性,相比电压反馈弱磁控制方法,较好地解决了高速电流耦合问题,且提高了弱磁的动态响应。Flux weakening is an effective measure to improve the speed regulation capability of HS-PMSM(high-speed permanent magnet synchronous motor).Under the traditional voltage feedback flux weakening control strategy,the control system contains two current regulation loops,and the d-q current coupling will increase with the increase of speed,resulting in poor control performance of high-speed drive,and even system instability in serious cases.In order to solve the problem,a new single-current field weakening control strategy was proposed based on voltage limiting in combination with the load characteristics of the compressor motor.By dynamically limiting the amplitude of the q axis voltage,the natural transition between the dual-current regulation mode at the middle and low speed and the single-current regulation mode at the high-speed field weakening was realized under a control topology.The simulation and experimental results verify the effectiveness of the proposed method.Compared with the traditional voltage feedback field weakening control method,it can better solve the high-speed current coupling problem and improve the dynamic response of field weakening.

关 键 词：高速永磁同步电机 单电流调节 弱磁控制 电压限幅 

分 类 号：TM341[电气工程—电机] TM351