无位置传感器永磁同步电机直接转矩控制研究  

Research on Direct Torque Control of Sensorless Permanent Magnet Synchronous Motor

作　　者：周苏[1,2] 余海[1] 孙小飞[2] 

机构地区：[1]同济大学中德学院,上海市200092 [2]同济大学汽车学院,上海市201804

出　　处：《农业装备与车辆工程》2016年第3期25-31,共7页Agricultural Equipment & Vehicle Engineering

摘　　要：在无位置传感器永磁同步电机直接转矩控制系统中,将定子磁链观测和转速估计相结合,设计了一个用于估计转子位置和转速的模型参考自适应(MRAS)观测器。该MRAS观测器在估计转子转速的同时还可以观测定子磁链,避免了传统磁链估计方法存在的由积分初始值和直流分量偏差引起的磁链漂移问题。仿真结果表明,该模型参考自适应系统在低速和高速时均有较好的估计效果,通过设置合理的积分初始值,电机转子处于不同的位置时电机均可顺利起动。In the direct torque control system of sensorless permanent magnet synchronous motor（PMSM））, a model reference adaptive control system（MRAS） observer was designed to estimate rotor position and speed, which could also achieve stator flux observation and avoid flux drifting problems existing in conventional stator flux estimation ways, caused by the deviations of initial integral values and direct current signals. The simulation results show that the MRAS has perfect estimation effects at both low speed and high speed. The motor can be started up successfully by setting reasonable initial integral values when the rotor is in different start positions.

关 键 词：永磁同步电机 转矩控制 自适应系统 磁链观测器 

分 类 号：TM344.4[电气工程—电机]