基于GaN的高功率密度AC-DC-AC单相无变压器在线式UPS变换器

This article introduces a new transformerless ac–dc–ac converter topology suitable for a high-power-density high-frequency single-phase online uninterruptible power supply (UPS) with a common neutral between the input and output ac ports. The proposed converter comprises an input power factor correction rectification (ac–dc) stage which is followed by an inversion (dc–ac) stage. The rectification ...