New Hybrid Control for Wide Input Full-bridge LLC Resonant DC/DC Converter

Xiao Yudi, Mao Xingkui, Zhe Zhang, Shi You

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

In order to achieve low switching frequency range and high efficiency for a wide-input LLC resonant converter, a new hybrid control combining pulse-frequency modulation (PFM) and phase-shift pulse-width modulation (PS-PWM) is proposed. In the new control, the LLC converter has two operation modes, i.e PFM and PFM+PS-PWM. The new control scheme and operation principle is analyzed deeply, and then efficiency optimization can be carried out by the proposed design procedure for the resonant tank of LLC converter. Finally, a prototype is developed with input voltage range from 22V to 45V, and rated power of 250W and output voltage of 380V. The experiment shows that the peak efficiency of LLC converter reaches to 96.2%, and verifies the proposed control scheme, design.
Original languageEnglish
Title of host publicationProceedings of 3rd International Conference on Intelligent Green Building and Smart Grid
Number of pages4
PublisherIEEE
Publication date2018
ISBN (Print)9781538606605
DOIs
Publication statusPublished - 2018
Event3rd International Conference on Intelligent Green Building and Smart Grid - National Ilan University, Yilan, Taiwan, Province of China
Duration: 22 Apr 201825 Apr 2018
http://igbsg.ntust.edu.tw/index.php

Conference

Conference3rd International Conference on Intelligent Green Building and Smart Grid
LocationNational Ilan University
CountryTaiwan, Province of China
CityYilan
Period22/04/201825/04/2018
Internet address

Keywords

  • LLC resonant DC/DC converter
  • Phase-shift PWM
  • PFM
  • New energy power generations

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