| Summary: | 碩士 === 東南科技大學 === 電機工程研究所 === 97 === This thesis presents a step-up and high power phase-shift full-bridge
converter with primary-side energy recovery. Main feature of the power
converter includes a voltage control loop, isolated transformer for power
transmission, and a resonance winding inductor. The converter has five
conversion states including power-delivery state, first-resonant state,
energy-holding state, second-resonant state, and energy commutation
state. An auxiliary winding around the resonant inductor at primary side
is built to transfer the spike noise back to input capacitor so as to reduce
the resonant ringing and increase efficiency. Small-signal analysis and
design consideration are conducted to verify the system performance and
set up system design, respectively.
A practical design of 700W step-up power converter with 250V
output is examined. The converter can operate with ZVS and can provide
high efficiency up to 80%. Experimental results are so close to the
theoretical prediction.
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