一种基于无速度传感器的PMSM的转子角度、转速估计方法  

Rotor Position and Speed Estimation Method for Sensorless Control of Permanent Magnetic Synchronous Machine

作　　者：周宏林[1] 况明伟 吴建东[1] 

机构地区：[1]中国东方电气集团有限公司中央研究院,四川成都611731

出　　处：《电气传动》2013年第3期3-6,共4页Electric Drive

摘　　要：针对基于无速度传感器的永磁同步电机,提出了一种新的转子角度、转速估计方法。该方法基于静止坐标系对永磁同步电机的转子进行角度、转速估计,可以在避免传统估计方案中基于锁相环的转子磁链定向过程的同时,消除可能引起系统不稳定的局部环,进而提高估计方法的动态性能。为获得转子角度估计值,该方法并不直接对快速变化的转子角度计算值进行滤波,而是首先对缓慢变化的转子角度初值进行滤波,然后再将其叠加到快速变化的有偏转子角度计算值上,从而获得转子角度的无偏估计。针对典型的1.5 MW直驱风力发电系统的仿真实验结果显示,该估计方法的稳态特性与传统反电势锁相环法类似,但动态特性得到了显著的提高。A new rotor position and speed estimation method for sensorless control of PMSM in high speed range was proposed. In order to improve the dynamic performance of conventional back-EMF methods, the proposed method eliminates the phase-lock loop （PLD while at the same time, avoids the potential local loop that might cause system unstable in closed-loop sensorless control. Instead of directly filtering the fast-changing calculated rotor position signal, the proposed method first filters a slowly varying signal, i.e. the calculated initial rotor position, to obtain the estimated rotor position. Then the estimated initial rotor position is added to the calculated rotor position to form an unbiased estimation of rotor position. The simulation results of a typical 1.5 MW direct drive wind turbine system illustrate that the steady-state performance of the proposed method is similar to conventional EPLL （EMF phase-locked loop） method but the dynamic performance for rotor position is considerably improved, owning to its forward structure.

关 键 词：转角估计 转速估计 无速度传感器控制 永磁同步电机 

分 类 号：TM614[电气工程—电力系统及自动化] TM761