Novel ZVS S-TCM Modulation of Three-Phase AC/DC Converters

IEEE Open Journal of Power Electronics

Dehong Xu¹  Gerald Deboy²  Neha Nain³  Michael Haider³  Johann W. Kolar³  Spasoje Miric³  Jon Azurza Anderson³  Grayson Zulauf³ 

[1] Electrical Engineering, Zhejiang University, Hangzhou, China;Infineon Technologies Austria AG, Villach, Carinthia, Austria;Power Electronic Systems Laboratory (PES), ETH Zurich, Zurich, Switzerland;

关键词: Three-phase electric power;    inverters;    rectifiers;    DC-AC power converters;    AC-DC power converters;    power MOSFET;   

DOI  :  10.1109/OJPEL.2020.3040036

来源: DOAJ

【 摘 要 】

For three-phase AC-DC power conversion, the widely-used continuous current mode (CCM) modulation scheme results in relatively high semiconductor losses from hard-switching each device during half of the mains cycle. Triangular current mode (TCM) modulation, where the inductor current reverses polarity before turn-off, achieves zero-voltage-switching (ZVS) but at the expense of a wide switching frequency variation (15× for the three-phase design considered here), complicating filter design and compliance with EMI regulations. In this paper, we propose a new modulation scheme, sinusoidal triangular current mode (S-TCM), that achieves soft-switching, keeps the maximum switching frequency below the 150 kHz EMI regulatory band, and limits the switching frequency variation to only 3×. Under S-TCM, three specific modulation schemes are analyzed, and a loss-optimized weighting of the current bands across load is identified. The 2.2 kW S-TCM phase-leg hardware demonstrator achieves 99.7% semiconductor efficiency, with the semiconductor losses accurately analytically estimated within 10% (0.3 W). Relative to a CCM design, the required filter inductance is 6× lower, the inductor volume is 37% smaller, and the semiconductor losses are 55% smaller for a simultaneous improvement in power density and efficiency.

【 授权许可】

Unknown