Title page for etd-0714113-223739


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URN etd-0714113-223739
Author Wei-sheng Ou
Author's Email Address ga585435@yahoo.com.tw
Statistics This thesis had been viewed 5574 times. Download 2672 times.
Department Electrical Engineering
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Hybrid Zero-Voltage- and Zero-Current-Switching Phase-Shift Full-Bridge Converter
Date of Defense 2013-07-18
Page Count 111
Keyword
  • zero-current switching
  • phase-shift full bridge converter
  • zero-voltage switching
  • resonant circuit
  • Abstract Conventional phase-shift full-bridge converter can achieve Zero-Voltage Switching (ZVS) at power switches by phase shift control of switches’ driving signal. However, the problems such as freewheeling circulating loss, duty cycle loss, parasitic ringing and hard to achieves ZVS in the lagging leg switches at light load still exist in the conventional phase-shift full-bridge converter. Thus the conventional phase-shift full-bridge converter can not be operated efficiently at light load. This thesis implements a hybrid Zero-Voltage and Zero Current Switching (ZVZCS) phase-shift full-bridge converter. An auxiliary resonant circuit is added to the secondary side of the conventional phase-shift full-bridge converter to generate resonant current. Based on the generated resonant current, the ZVS for leading-leg switches and ZCS for lagging-leg switches can be achieved without modifying the original switches’ driving Pulse Width Modulation (PWM) signals. The freewheeling circulating loss, duty cycle loss and parasitic ringing can therefore be reduced. The detailed operation modes and circuit parameters design for the proposed converter are analyzed in this thesis. A circuit prototype for the proposed ZVZCS phase-shift full-bridge converter with rated power 480W is implemented in this thesis. The performances between the conventional phase-shift full-bridge converter and the proposed ZVZCS phase-shift full-bridge converter are also investigated. Experimental results demonstrate the features of the proposed ZVZCS converter.
    Advisory Committee
  • Yi-Hua Liu - chair
  • Tzung-Lin Lee - co-chair
  • Hung-Liang Cheng - co-chair
  • Jen-Hao Teng - advisor
  • Files
  • etd-0714113-223739.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-08-14

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