This paper describes a new soft-switched PWM inverter with simple control. The control of the proposed inverter uses only PWM pattern for the output control The special control for ensuring the soft-switching operation is unnecessary. When the main switches are turned on, the zero-current-switching operation can be realized by the reactors in series. When the main switches are turned off, the zero-voltage-switching operation can be automatically realized by the cap acitors in parallel. The output currents of the proposed inverter have no distortion caused the blanking time for the prevention of the arm shorted fault at low output frequency because the load current can flow during the blanking time.
In this paper, the operation principle, the experimental results and the output characteristics of the proposed inverter will be described.