The LC-PWM-SF-RDC cell in the application of DC-DC converters and DC-link inverters

The use of the lossless commutation pulse width modulation (PWM) source feeding resonant disconnecting circuit (LC-PWM-SF-RDC) cell in the DC link and DC-DC power converter topologies is proposed. The most important property of this cell in DC-DC applications is the ability to regulate output power and voltage by PWM, with constant operating frequency, and without sacrificing the lossless commutation. In the case of a DC link application the use of the LC-PWM-SF-RDC cell allows the inverter legs to be switched in low frequency, while the resonant DC link circuit is switched in high frequency by using conventional PWM strategies for DC-DC power converters. Operation principles, output characteristics, relevant equations, simulation and experimental results are presented for use of this cell in a buck DC-DC power converter. The simulation results for a DC link inverter are presented.<
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