Single- phase permanent magnet motor has lower efficiency than 3-phase permanent magnet motor, however, there are advantages such as reduction of switching elements and high efficiency, and thus, it is widely to small portable. The single phase PMSM h...
Single- phase permanent magnet motor has lower efficiency than 3-phase permanent magnet motor, however, there are advantages such as reduction of switching elements and high efficiency, and thus, it is widely to small portable. The single phase PMSM has asymmetric gap. Therefore, an unstable mode switching phenomenon may occur due to an error in the rotor position angle during sensorless switching. The proposed soft sensorless operation switching is verified through several experiments.