电机转子初始位置检测新方法研究  

Research on a new method for detecting the initial position ofm otor rotor

作　　者：周晓迪 费有静 Zhou Xiaodi;Fei Youjing(Zhenjiang Technician Institute,Zhenjiang Jiangsu,212114)

机构地区：[1]镇江技师学院,江苏镇江212114

出　　处：《电子测试》2022年第7期66-68,65,共4页Electronic Test

摘　　要：针对转子磁钢内埋式永磁同步电动机(PMSM)无速度传感器控制系统,提出一种新型转子初始位置检测方法。该方法通过注入高频旋转电压,在定子绕组中产生包含转子空间位置信息的高频电流。与传统高频注入法不同的是,采用离散傅里叶变换(DFT)对高频电流进行解调。避免了传统外差法解调时使用大量滤波器造成信号相位延迟,同时该方法与注入信号初始相位无关,相比于外差法,提取出的转子位置角度更精确,而且结构简单非常适用于数字系统。仿真和基于dSPACE实验平台上验证了该方法的有效性与可行性。Aiming at the speed sensorless control system of rotor magnet steel embedded permanent magnet synchronous motor(PMSM),a new rotor initial position detection method is proposed.By injecting high-frequency rotating voltage,high-frequency current containing rotor spatial position information is generated in stator winding.Different from the traditional high-frequency injection method,discrete Fourier transform(DFT)is used to demodulate the high-frequency current.Compared with the heterodyne method,the extracted rotor position angle is more accurate and simple in structure,which is very suitable for digital system.The effectiveness and feasibility of this method are verified by simulation and experiment platform based on DSpace.

关 键 词：永磁同步电动机 高频注入 离散傅里叶变换 转子初始位置检测 无传感器控制 

分 类 号：TM35[电气工程—电机]