A Novel Soft-Switched PWM Inverter for AC Motor Drives - Power Electronics, IEEE Transactions on
نویسندگان
چکیده
AbstructA novel soft-switched inverter topology is derived from the passively clamped quasi-resonant link (PCQRL) circuit. By introducing magnetic coupling between the two resonant inductors, the number of auxiliary switches can be reduced from two to one, and only a single magnetic core is required for the resonant dc link. An analysis of this novel PCQRL topology with coupled inductors is presented to reveal the various softswitching characteristics. In comparison with the conventional passively clamped, continuously resonant dc link inverter, this soft-switched inverter can reduce voltage stresses from more than 2 per unit (pu) to 1.1-1.3 pu. It can also provide softswitched pulse-width modulated (PWM) operation. Simulation and experiment are performed to backup the analysis.
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