A PWM method for reduction of switching loss in a full-bridge inverter

Abstract

This paper presents the hybrid pulsewidth modulation (HPWM) method which requires only two of the four switches in a full-bridge inverter to be pulsewidth-modulated at high frequency, thus effectively reducing the switching loss by a factor of two. For triangular carriers, the HPWM frequency spectrum is identical to the conventional unipolar PWM (UPWM) spectrum. A low-frequency model for a fast-switching HPWM full-bridge inverter with high-quality output is described, and is substantiated by experimental data.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>