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

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.<
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