本論文主要研製一台儀器用380W隔離型交流/直流電源轉換器，
前級採用電路連續導通模式升壓型功率因數修正器，用以提升電路
操作時的功率因數，降低其電流諧波成分。後級直流/直流轉換器電
路架構則為半橋LLC型串聯諧振轉換器，配合零電壓切換減少功率開
關切換損耗，達到電路效率的提升。並設計一返馳式轉換器電路，提
供控制IC與保護電路的輔助電源。
電路規格如下，交流電壓在75~288V的寬範圍輸入、輸出電壓/
電流為直流600V/0.63A、最大輸出功率則為380W。雛型電路驗證了
本論文所研究的電路架構與控制方法的可行性，並符合整體規格功能，
包括整機操作在滿載時，效率能達到90%以及功率因數均在0.98以上、
湧浪電流限制在10A以下、輸出電壓漣波控制在±3V內與電路保護功
均能正常動作。

This thesis developed a 380 watt Isolated AC/DC power supply for
instrumentation applications. A Continuous Conduction Mode (CCM)
Boost Power Factor Corrector is used as the pre-regulator for improving
the input power factor and reducing the total harmonic distortion of the
input current. A Half-Bridge LLC Series Resonant Converter (HB
LLC-SRC) is adopted as the DC-DC conversion stage. Switching losses
on switches can be significantly reduced. The efficiency of circuit can be
improved. A flyback converter is used as for control stage IC and
protection circuit.
The circuit specification are as follow: wide AC input voltage 75Vac
to 288Vac, 600V output voltage, 0.63A output current, 380W maximum
power output. Experimental results of a prototype circuit was tested to
verify the feasibility of the proposed scheme and control strategy. The
performance under full load is also according with the circuit
specification and the protective function works normally. The
experimental data are shown as below: efficiency above 90%, power
factor more than 0.98, inrush current under 10A, and output ripple among
±3V

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