Novel detecting method for starting rotor position of permanent magnet synchronous motor

REN Yu， CAO Peng
（Institute of Software and Intelligence， Hangzhou Dianzi University， Hangzhou 310018， China）

Abstract： The present starting rotor position of permanent magnet synchronous motor（PMSM） detecting methods relied on accurate current detection circuits or complex modeling and calculation. To avoid these problems， a new method was presented to detect starting rotor position of PMSM. The method exerted a certain order of 24 special space vectors on motor when motor is powered up and generated small jitter on rotor in a short time. By judging the direction of jitter， the rotor position could be estimated. Besides， this method is easy to realize. The experimental results indicate that this method can obtain satisfactory result， and makes the motor start smoothly.
Key words： permanent magnet synchronous motor（PMSM）； starting position； space vector； magnetic pole； incremental encoder