Permanent magnet synchronous motor sensorless control based on rotor flux observer with low-pass filter adaptation

This paper presents a strategy for permanent magnet synchronous motor sensorless vector control based on rotor flux estimation considering saliency. The integration problem in the stator was solved by replacing integrator with low-pass filter. filter parametric adaptation algorithm phase delay compensation, Bode diagrams designed angular position accuracy improving. proposed adaption allowed to expand stable high down 15 rpm. Also developed together adaptive field weakening provides sable operation at speed.