A 6/4 pole PM-assisted synchronous reluctance motor drive

To save energy and reduce carbon emission, a current vector drive based on a three-phase 6/4 pole permanent magnet assistant synchronous reluctance motor (PMA-SynRM) without position sensors is proposed for industrial applications. Using a 6/4 pole PMA-SynRM, a three-phase full bridge inverter is combined with the current vector control scheme with third harmonic current injection and current phase advancing to exhibit drive´s performance. Quietness, robustness and quick speed response can be achieved. When a three-phase, 400 W, 6/4 pole, PMA-SynRM drive system was operated from 100 to 3000 rpm, experimental results show that it exhibits a steady-state speed error below 0.1%, a shaft torque at 3 N-m, and a maximal acoustic noise at 72 dB, shaft torque is high, torque ripple is less, dynamical speed response is quick. It is suitable for high performance industrial applications with energy-saving.