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This paper presents a zero-voltage (pulsewidth modulation) half-bridge inverter with active voltage clamping using only a single auxiliary switch. The structure is particularly simple and robust. It is very attractive for single-phase high-power applications. Switching losses are reduced due to implementation of the simple active snubber circuit that provides zero-voltage-switching conditions for all switches, which includes the auxiliary one. Its main features are simple modulation strategy, robustness, low weight and volume, low harmonic distortion of the output current, and high efficiency. The principle of operation for steady-state conditions, mathematical analysis, and experimental results from a laboratory prototype are presented. [ABSTRACT FROM AUTHOR]

This paper presents a regenerative step-up/step- down dc-dc zero-voltage-switching pulsewidth-modulation converter with active clamping. The switch losses are reduced due to the implementation of a simple active snubber circuit that provides soft commutation in all the switches of the converter. The theoretical analysis, basic equations, design methodology, and experimental results are shown in this paper. A control methodology to assure the output voltage regulation is also proposed. The main advantages of the proposed power converter are the small number of components, simplicity of the controller, robustness, small weight and size, and high efficiency. [ABSTRACT FROM AUTHOR]