Journal of Chaohu University ›› 2022, Vol. 24 ›› Issue (3): 104-110.doi: 10.12152/j.issn.1672-2868.2022.03.015

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Design of Frequency Tracking CLLC Resonant Bidirectional DC/DC Converter

CHEN Xin-he,SHAO Rui:School of Electronic Engineering, Chaohu University;LIU Yan-li:Chaohu Chunhui Group   

  1. 1. School of Electronic Engineering, Chaohu University, Chaohu Anhui 238024; 2. Chaohu Chunhui Group, Chaohu Anhui 238024
  • Received:2022-04-17 Online:2022-05-25 Published:2022-09-07

Abstract: By comparing the topological characteristics of various DC/DC converters, an isolated bidirectio nal bridge DC/DC converter (BDC) with high power supply and transformer utilization and high power d ensity is selected; in order to improve the voltage gain and energy transmission efficiency, the resonant t ype is improved. BDC; in order to achieve consistent bidirectional operating characteristics and soft switc hing function, it is further improved to CLLC resonant BDC; in order to achieve constant voltage gain a nd transmission efficiency under frequency offset, a frequency tracking CLLC resonant BDC is finally de signed. The simulation results show that the frequency-tracking CLLC resonant BDC designed in this pap er can maintain high voltage gain and energy transmission efficiency under a large frequency range offset, no matter it is forward transmission or reverse transmission, and the bidirectional transmission characteris tics are basically Consistent.

Key words: DC/DC conversion, bidirectional converter, frequency tracking, parameter setting, voltage gain

CLC Number: 

  • TM41