基于全周期电流包络线开关磁阻电机无位置传感器技术  

Sensorless of switched reluctance motor drives based on full cycle current envelope

作　　者：张磊 刘闯[2] 韩守义[2] ZHANG Lei;LIU Chuang;HAN Shou-yi(School of Electronic Engineering,Nanjing Xiaozhuang University,Nanjing 211171,China;College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京晓庄学院电子工程学院,江苏南京211171 [2]南京航空航天大学自动化学院,江苏南京210016

出　　处：《电机与控制学报》2019年第11期109-117,共9页Electric Machines and Control

基　　金：国家自然科学基金(51377076);江苏省自然科学基金(BK20151574)

摘　　要：针对开关磁阻电机在低速运行状况下位置估计困难的问题,依据转子位置信号与电感曲线之间关系,提出一种全周期脉冲电流峰值包络线的无位置传感器技术。导通区域利用固定转波时间的斩波控制方式,非导通区域进行注入高频脉冲,两个区域里分别检测出脉冲电流的峰值,通过数学拟合得到全周期脉冲电流包络线与电机转子位置角之间的数学模型,再通过简易的逻辑比较模块即可得到电机转子位置信号,再根据转子位置信号之间的夹角估算出电机转速和转子位置角度。所提方法由于三相电流包络线交接点在电感上升和下降过程中,电感变化率大,所以不同脉冲下的电流峰值变化大,从而提高了微处理器处理精度,且不需要预先设置脉冲电流阀值,算法简单,容易实现。最后通过仿真和实验,验证了所提方法的正确性和可行性。In order to solve the difficulty of sensorless low speed operation of switched reluctance motor,according to the relationship between the rotor position signal and the inductance curve and the peak value of the pulse current for the switched reluctance motor,a new sensorless technique was presented using the full cycle pulse current peak envelope.Using the chopper control mode in the conducting region,and using the high frequency pulse injection in the non-conducting region,and the peak value of the pulse current was detected in the two regions,the mathematical model between peak envelope of pulse current and rotor position was obtained by fitting.The position signal was estimated by means of using a simple logic comparison module,and the motor speed and rotor position angle were estimated.Because the envelope intersection point is not in the maximum and minimum inductance regions,the position estimation error is small,and also need not set the pulse current threshold.The algorithm is simple and easy to implement.The experiments and simulation results demonstrate the feasibility and the practicality of the proposed method.

关 键 词：开关磁阻电机 全周期包络线 位置估计 斩波控制 脉冲注入 

分 类 号：TM351[电气工程—电机]