永磁同步电机无位置传感器控制低速性能提升方法  

Improvement methods for low-speed range sensorless control performance of PMSMs

作　　者：吴春 赵宇纬 Wu Chun;Zhao Yuwei(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023)

机构地区：[1]浙江工业大学信息工程学院,杭州310023

出　　处：《高技术通讯》2021年第8期844-851,共8页Chinese High Technology Letters

基　　金：浙江省自然科学基金(LQ18E070005);国家自然科学基金面上项目(61973274)资助。

摘　　要：针对永磁同步电机(PMSM)位置观测器在低速范围受逆变器非线性、定子电阻和电感参数摄动等因素影响而导致位置估计精度下降的问题,提出一种集成定子电阻自适应的降阶磁链观测器,同时通过离线测量的电感饱和特性制作电感随电流变化的曲线进行电感在线更新,提高低速范围位置估计精度。使用了三相端电压测量电路,采用测量电压代替给定电压,消除逆变器非线性因素对位置估计的影响。将所提策略在150W的永磁同步电机实验平台上进行验证,实验结果表明所提策略无需准确电阻参数,在各种运行工况下位置估计精度高,可实现速度反转,增强了无位置传感器控制低速性能。This paper concerns mainly on the problem of the estimation accuracy of position observers for a permanent magnet synchronous motor(PMSM) sensorless controlling which is affected by factors such as inverter nonlinearities,stator resistance and inductance etc.in low-speed range.A reduced-order flux observer with stator-resistance adaptation is proposed.At the same time,the curve of inductance versus current is made by offline measurements to further improve the accuracy of the position estimation.Moreover,a three-phase terminal voltage measurement circuit is designed.Then the position observer uses the measured phase voltages directly instead of command voltages to eliminate the influence of the nonlinear factors of the inverter.The proposed strategy is tested using a 150 W PMSM drive.Experimental results show that the proposed strategy does not require accurate stator-resistance and the high position estimation accuracy under various operating conditions,and can also achieve speed reversal.Hence,the proposed method can enhance the performance of the PMSM sensorless controlling in low-speed range.

关 键 词：永磁同步电机(PMSM) 无位置传感器控制 位置观测器 定子电阻估计 

分 类 号：TM341[电气工程—电机]