Naturally Adaptive, Low-Loss Zero-Voltage-Transition Circuit for High-Frequency Full-Bridge Inverters With Hybrid PWM

Xia, Yinglai; Ayyanar, Rajapandian

doi:10.1109/tpel.2017.2734638

Naturally Adaptive, Low-Loss Zero-Voltage-Transition Circuit for High-Frequency Full-Bridge Inverters With Hybrid PWM

Journal Article · Mon Jul 31 00:00:00 EDT 2017 · IEEE Transactions on Power Electronics

DOI:https://doi.org/10.1109/tpel.2017.2734638· OSTI ID:2446687

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Arizona State University, Tempe, AZ (United States); PowerAmerica/NC State University
Arizona State University, Tempe, AZ (United States)

This paper proposes a low-loss, auxiliary zero-voltage-transition (ZVT) circuit to realize zero-voltage-switching (ZVS) for all the main switches of a full bridge inverter, and inherent zero-current-switching (ZCS) turn-on and ZCS turn-off for the auxiliary switches. Two configurations consisting of discrete inductor and coupled inductor structures are proposed. The advantages of the proposed strategy include the provision to implement zero state modulation schemes such as unipolar and hybrid PWM schemes in the full bridge inverter to achieve low THD, naturally adaptive auxiliary inductor current and the elimination of capacitor voltage balancing issues seen in other similar ZVT approaches. The modulation scheme and the commutation stages are analyzed in detail. The complete inverter including the auxiliary ZVT branch is modeled in detail. Finally, a 1 kW, 400 kHz switching frequency inverter of the proposed topology using SiC MOSFETs has been built to validate the theoretical analysis. Furthermore, the ZVT with hybrid modulation technique is implemented in DSP TMS320F28335 resulting in full ZVS for the main switches in the full bridge inverter. Compared to conventional hard switching full bridge inverter, the proposed scheme improves the CEC efficiency from 95.58% to 97.63% and the peak efficiency from 96.29% to 97.91%.

View Accepted Manuscript (DOE)

Research Organization:: North Carolina State University, Raleigh, NC (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0006521

OSTI ID:: 2446687

Alternate ID(s):: OSTI ID: 1541534

Journal Information:: IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 6 Vol. 33; ISSN 0885-8993

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
Zero-voltage-transition (ZVT)
adaptive auxiliary current
full bridge inverter
hybrid modulation
soft switching
zero-current-switching (ZCS)
zero-voltage-switching (ZVS)

Naturally Adaptive, Low-Loss Zero-Voltage-Transition Circuit for High-Frequency Full-Bridge Inverters With Hybrid PWM

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