空调压缩机低速无位置传感器控制策略  

Low Speed No-position Sensor Control Strategy for Air Conditioning Compressor

作　　者：刘细平 丁卫中 袁长征 蔡少文 LIU Xiping;DING Weizhong;YUAN Changzheng;CAI Shaowen(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学电气工程与自动化学院,江西赣州341000

出　　处：《电气传动》2021年第2期3-8,共6页Electric Drive

基　　金：国家自然科学基金(51267006,51267003);江西省自然科学基金(20151BBE50109,20153BCB23012,GJJ160598);江西省教育厅科技计划(GJJ12332)。

摘　　要：由于空调压缩机内部含有腐蚀性制冷剂,无法安装位置传感器,传统的恒流频比(I/f)方法在中、高速以下运行时,存在控制精度低、响应慢等问题。针对这一问题,提出了基于脉振高频正弦电压注入策略。通过对电流信号进行处理,获取得到转子位置、磁极方向信息。引用了锁相环(PLL)位置跟踪策略以降低对电机参数与检测精度的依赖性。为检测出转子磁极方向,提出了一种对正、负半轴的直轴高频电流信号分别进行积分、比较的转子磁极方向识别策略。仿真与实验结果表明该方法能在低速条件下对转子位置快速跟踪,鲁棒性强。Since the air conditioner compressor contains corrosive refrigerant inside,the position sensor cannot be installed.When the conventional constant current frequency ratio(I/f)method is operated below the medium and high speed,there are problems such as low control precision and slow response.Aiming at this problem,a high frequency sinusoidal voltage injection strategy based on pulse vibration was proposed.The rotor position and magnetic pole direction information were obtained by processing the current signal.The phase-locked loop(PLL)position tracking strategy was cited to reduce the dependence on the motor parameters and detection accuracy.In order to detect the rotor pole direction,a rotor pole direction identification strategy was proposed in which the direct-axis high-frequency current signal for the positive and negative half-axis was separately integrated and compared.The simulation and experimental results show that the proposed method can track the rotor position quickly under low speed conditions and has strong robustness.

关 键 词：空调压缩机 脉振高频正弦电压 锁相环 磁极方向识别 直轴高频电流积分 

分 类 号：TM351[电气工程—电机]