逆变器寄生电容对永磁同步电机无传感器控制的影响  

Effect of Inverter Parasitic Capacitance on Sensorless Control for Permanent Magnet Synchronous Motor

作　　者：戴鹏[1] 赵烨[1] 苗文彬[1] 董苏[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221116

出　　处：《电气传动》2014年第6期3-7,共5页Electric Drive

摘　　要：逆变器非线性特性会对基于高频注入法的永磁同步电机转子位置和速度观测产生影响,不利于电机的精确控制。在分析逆变器非线性特性中寄生电容效应及其对高频载波电流响应影响的基础上,提出了一种旨在减小此非线性影响的新颖补偿方法。此方法直接利用高频电流响应中的正序电流分量对包含转子位置信息的负序电流分量进行补偿,使作为位置观测器输入的误差信号更为精确。仿真和实验结果证明了此补偿方法的正确性,有效提高了转子位置检测精度,且具有良好的动稳态性能。Inverter nonlinearity effects have impacts on the observation of the rotor position and speed information in sensorless control system for PMSM drives based on high- frequency signal injection,which is not conducive to precise control of the motor.The inverter parasitic capacitance effect and its influence on high-frequency carrier current response were analyzed,and proposed a novel compensation method.This method uses the positive-sequence carrier current to compensate the negetive- sequence carrier current which contains the rotor position information.The simulation and experimental results prove the correctness of this compensation method,which can improve the accuracy of the rotor position detection and the dynamic performance of the motor.

关 键 词：永磁同步电机 逆变器非线性 寄生电容 高频注入 补偿 

分 类 号：TM351[电气工程—电机]