基于改进反电势积分的永磁同步电机位置检测  

Position detection of PMSM based on the improved back-EMF integration method

作　　者：刘刚[1,2] 肖烨然[3] 孙庆文 

机构地区：[1]北京航空航天大学惯性技术重点实验室,北京100191 [2]北京航空航天大学新型惯性仪表与导航系统技术国防重点学科实验室,北京100191 [3]武汉船用电力推进装置研究所,湖北武汉430064

出　　处：《电机与控制学报》2016年第2期36-42,共7页Electric Machines and Control

基　　金：国家重大科学仪器设备开发专项(2012YQ040235);国家自然科学基金(61203203);航空创新基金(2012Z1315);北京市创新基金(J131104002813105)

摘　　要：针对传统反电势积分法在永磁同步电机无位置传感器位置检测中存在的积分初值问题和易引入直流偏量问题,提出了一种基于自适应补偿算法的改进积分器的转子位置检测方法,其利用理想的定子磁链与反电动势正交这一事实,对定子磁链进行估测和修正,若估测的定子磁链发生畸变,该正交性随即被破坏,所以可将正交偏差量经过调节器后作为补偿信号反馈回磁链估计通道,经这种自适应补偿后,很好地解决磁链估计中出现的积分初值问题和直流偏移问题,从而可准确估算出电机转子位置。仿真和实验不仅验证了该方法的有效性,也对其与传统反电势积分法进行了比较研究。实验结果表明,经自适应补偿的反电势积分法能在宽转速范围内准确估算出电机转子位置。On the initial value problem and the DC bias problem of traditional back-EMF sensorless position detection of PMSM, a rotor position detection method based on the improved integrator using an adaptive compensation algorithm was proposed. By employing fact that ideal stator flux should be completely orthogonal to the back-EMF, the stator flux was estimated and corrected adaptively. If the estimated stator flux is distorted, immediately, the orthogonality will be destroyed, the orthogonality offset was made to go through a regulator, and the output of the regulator as a compensation signal is fed back to the flux estimation channel, through the adaptive compensation the DC offset problem and initial value problem was solved nicely, and accordingly, the rotor position was accurately estimated. The simulation and experiments validate that this method is effective, and it was compared with the traditional baek-EMF integration method. Experimental results show that the back-EMF integration method based on adaptive compensation algorithm can accurately estimate the rotor position in a wide speed range.

关 键 词：永磁同步电机 积分初值 直流偏量 自适应补偿 位置检测 

分 类 号：TM341[电气工程—电机]