A true PWM zero-voltage switching pole, with very low additional RMS current stress

A converter topology referred to as true pulsewidth modulated zero-voltage switching pole with very low additional RMS current stress is presented. The main switches are turned on and off at zero-voltage without overvoltage stress, from non-load up to full-load. It is regulated by the conventional PWM. Auxiliary devices, such as diodes, transistors, inductors, and autotransformers, are employed, but rated at very low RMS current, leading to high efficiency and compactness. Analysis, design, simulation, and experimental results are provided. The converter is suitable for high-power and high-frequency converters, for UPS and electric drives applications