Research on operation of SPMSM based on high frequency injection
The mathematical model of surface-mounted permanent magnet synchronous motor(SPMSM)under high frequency excitation is formulated.The vector control system of SPMSM is constructed based on pulsating high frequency injection method,which employs a Luenberger observer for speed and position estimation to improve the position estimation accuracy and achieve the low-speed operation of the motor without position sensor.The initial position estimation of rotor pole is realized by phase-locked loop and second harmonic detection to ensure the fast starting of motor.The proposed method is simulated on MatLab/Simulink platform.The results show that the method improves the control accuracy of the motor during low-speed operation.
surface-mounted permanent magnet synchronous motorwithout position sensorpulsating high frequency injectionLuenberger observerphase-locked loop
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