本論文主旨為實現ㄧ具有輸出電壓平衡控制之半橋式功率因數修正器,期望將雙輸出電容電壓控制在平衡的狀態,同時具備良好的功率因數修正與輸出電壓調節能力。 本論文所提半橋式功率因數修正器之控制策略採用UC3854A作為控制IC,以平均電流控制法操作於連續導通模式,並將正比於雙電容電壓差之直流補償訊號導入UC3854A產生的電流命令中,對輸入電流加以補償,調整電容電荷流量,達到雙電容電壓平衡。 最後以Matlab/Simulink建構出半橋式功率因數修正器的模擬環境並實作400W電路驗證此控制策略之可行性。
This thesis aims at implementing a half-bridge power factor corrector (PFC) with output voltage balance control to obtain a high power factor and balanced output voltage. The pulse-width-modulation (PWM) IC, UC3854A, is used to achieve average current control for the designed half-bridge PFC. In order to relieve the output voltage imbalance, a compensating signal proportional to the voltage imbalance is added to the current command. The simulation and experimental results are shown to verify the feasibility of the proposed method.