An optimized high frequency injection method for position sensorless control of PMSM
ZHU Longji
ZHU Qing
SHAO Hua
Abstract：The traditional high frequency signal injection method uses bandpass filter to separate the signal,and Romberg observer uses the obtained signal to calculate the rotor position.Considering the complex design of the bandpass filter and the attenuation of the amplitude of the high frequency signal,Romberg observer needs the motor torque feedback,moment of inertia and other mechanical parameters,which interfere with the dynamic performance of the motor control system.The signal separation method based on low pass filter can obtain the signal containing the rotor position without losing the high frequency signal.By using the relation-ship between the motor speed,rotor position Angle and its angular acceleration,the extended state observer can avoid the measurement of load torque and the estimation of uncertain disturbance.The simulation and ex-perimental results show that the optimization strategy can make the motor run stably at low speed control and has better low speed dynamic performance.
Keywords：high frequency signal injection methodseparation signalextended state observer
Publication Date：2024-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 47-54 )