Design and implementation of a novel permanent magnet synchronous drive with a new PWM strategy

This paper proposes a new pulse width modulation strategy for a voltage-sou rce current-regulated soft switching inverter feeding an ac motor. By simpl y adjusting the three-phase current commands, the overall number of commuta tions per output cycle can be reduced. Based on this new strategy, the clos ed-loop speed control and position control of the ac drive system have been designed to achieve high performance dynamic responses. A 16-bit microproc essor system (80196MC) has been used to execute all of the control algorith ms. Several experimental results validate the theoretical analysis. This pa per presents a new direction in design and implementation of a high efficie ncy and high performance ac drive system.