Widen the Zero-Voltage-Switching Range and Secure Grid Power Quality for An EV Charger Using Variable-Switching-Frequency Single-Dual-Phase-Shift Control

中国电气工程学报（英文） ›› 2018, Vol. 4 ›› Issue (1): 11-19.

出版日期:2018-03-25 发布日期:2019-10-31

Widen the Zero-Voltage-Switching Range and Secure Grid Power Quality for An EV Charger Using Variable-Switching-Frequency Single-Dual-Phase-Shift Control

Qi Tian, KevinBai^*

University of Michigan-Dearborn, USA

Online:2018-03-25 Published:2019-10-31
Contact: * Email:baihua@umich.edu.
About author:Qi Tian was born in 1988 in People’s Republic of China. She received her B.S. degree in Electrical Engineering at Tsinghua University, China, in July, 2010. She received her M.S. degree in Electrical Engineering at Tsinghua University, China, in July, 2012. She received her Ph.D. degree in the department of Electrical and Computer Engineering at North Carolina State University, US, in March, 2017. Her research interests include solar system distributed control, advanced Dual-active-bridge based AC/DC system control, and AC/DC power conversions. Kevin(Hua) BAI received B S and PHD degree in Department of Electrical Engineering of Tsinghua University, Beijing, China in 2002 and 2007, respectively. He was a post-doc fellow and research scientist in Univ of Michigan-Dearborn, USA, in 2007 and 2009, respectively. He was an assistant professor in Department of Electrical and Compurter Engineering, Kettering University, MI, USA in 2010~2016. From 2017 he joined University of Michigan-Dearborn as associate professor. His research interest is the power electronic modelling, control and integration including variable frequency motor drive system, high voltage and high power DC/DC converter, renewable energy and hybrid electric vehicles.

摘要/Abstract

Abstract: Compared to conventional electrical-vehicle(EV) on-board chargers utilizing a front-end Power-Factor-Correction(PFC) + an isolated DC/DC converter, which limits the wall-tobattery efficiency to ~94%, a new control strategy using variable switching frequency(VSF) and variable phase shifts frees the PFC stage thereby getting rid of the DC link capacitor and further increasing the system efficiency and power density. The challenge is to secure zero-voltage-switching (ZVS) turn-on for all switches within the full-power range. In this paper a novel VSF single-dualphase- shift(SDPS) control strategy is proposed, which consists of three control freedoms, i.e., two phase shifts and one variable switching frequency to secure ZVS and achieve PFC simultaneously. ZVS boundaries are pictured and compared among single-phase-shift(SPS), dual-phase-shift(DPS) and the proposed single-dual-phase-shift(SDPS) control. Simulation results and experimental validation through a level-2 EV on-board charger indicate that by using the proposed SDPS control, both ZVS and PFC are secured not only for the heavy load but also for the light load, without sacrificing the system efficiency.

Key words: Dual-active-bridge, phase-shift control, zero-voltage-switching, power-factor-correction

. [J]. 中国电气工程学报（英文）, 2018, 4(1): 11-19.

Qi Tian, KevinBai. Widen the Zero-Voltage-Switching Range and Secure Grid Power Quality for An EV Charger Using Variable-Switching-Frequency Single-Dual-Phase-Shift Control[J]. Chinese Journal of Electrical Engineering, 2018, 4(1): 11-19.

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Widen the Zero-Voltage-Switching Range and Secure Grid Power Quality for An EV Charger Using Variable-Switching-Frequency Single-Dual-Phase-Shift Control

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