Adaptive Driving Scheme for ZVS and Minimizing Circulating Current in MHz CRM Converters
Adaptive Driving Scheme for ZVS and Minimizing Circulating Current in MHz CRM Converters
复制标题
MHz CRM 转换器中的 ZVS 自适应驱动方案和最小化循环电流
DOI:
10.1109/tpel.2020.3025810
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发表时间:
2021-04
影响因子:
6.7
通讯作者:
Wang Laili
中科院分区:
文献类型:
--
作者:
Wang Kangping;Zhu Hongkeng;Wu Jiarui;Yang Xu;Wang Laili
The synchronous rectifier (SR) turn-off time should be accurately controlled to achieve zero voltage switching (ZVS) while minimizing circulating current in pulsewidth modulation converters operating at critical conduction mode. Traditionally, the zero-crossing of the inductor current needs to be detected, and the optimal SR turn-off time is set with reference to the zero-crossing signal. However, problems such as nonlinearity and time delay need to be dealt with, and these make the tuning process very time-consuming at high frequencies. Moreover, accurate zero-current detection is also challenging at high frequencies. This letter proposes an adaptive SR turn-off time tuning method for MHz power converters. The body diode conduction of active switch is detected to adjust the SR turn-off time. With the proposed method, the SR turn-off time can be tuned under various working conditions so that ZVS is achieved while circulating current is minimized. The proposed scheme is easy to implement and not sensitive to switching noise at high frequencies. A 500-W gallium nitride based boost converter is built to verify the proposed method, and the peak efficiency reaches 99% at 1 MHz.
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影响因子:
6.7
作者:
Xiucheng Huang;F. Lee;Qiang Li;W. Du
通讯作者:
Xiucheng Huang;F. Lee;Qiang Li;W. Du
DOI:
10.1109/ecce.2015.7309755
发表时间:
2015-09
期刊:
2015 IEEE Energy Conversion Congress and Exposition (ECCE)
影响因子:
--
作者:
Zhengyang Liu;F. Lee;Qiang Li;Yuchen Yang
通讯作者:
Zhengyang Liu;F. Lee;Qiang Li;Yuchen Yang
DOI:
10.1109/ecce.2019.8912203
发表时间:
2019-09
期刊:
2019 IEEE Energy Conversion Congress and Exposition (ECCE)
影响因子:
--
作者:
Jingjing Sun;Nathan N. Strain;D. Costinett;L. Tolbert
通讯作者:
Jingjing Sun;Nathan N. Strain;D. Costinett;L. Tolbert
影响因子:
6.7
作者:
D. Reusch;J. Strydom
通讯作者:
D. Reusch;J. Strydom
影响因子:
6.7
作者:
Weiyi Feng;F. Lee;P. Mattavelli;Daocheng Huang
通讯作者:
Weiyi Feng;F. Lee;P. Mattavelli;Daocheng Huang