本論文係針對備用式不斷電電源系統，研製兼具有交流電壓調節之電能轉換器，該設計架構具有如下之功能特點:(1)傳統交流電壓調節器一般利用矽鋼片低頻變壓器調整，其重量重、電壓調整率差與效率低；本論文所提之電路方式為利用電容做電壓調節器，依據輸入電壓變化，調整換流器電容電壓大小與相角，來維持輸出負載電壓穩定，此做法可大幅改善傳統交流電壓調節器缺點。(2)本電路架構，於市電斷電時，僅改變電驛接合點，便可使電路由電壓調整器功能轉換至不斷電電源系統，於負載端持續得到穩定之電源電壓，如此提高了電子電路元件的利用率，縮小設備體積。最後本論文製作一組具交流電壓調整之600W不斷電電源雛形系統，由實驗結果得到，當輸入電源變動時，均可於輸出負載端得到穩定交流電源，驗證本系統之可行性。

In this thesis, upon the Standby UPS system, a set of the AC voltage regulator functional electrical inverter is designed. The sketch use the changes of the relays contact points to enable the circuitry of having the following function: (1) Comparing with the adjustment method of the low-frequency transformer of the conventional silicon steel, it’s benefited with light weight, precision stable voltage adjustment and high efficiency. The main manner is control series-Capacitor feedback voltage, and then the inverter will have the automatic AC voltage regulator, AVR, function to supply the ability of regulating the stable output voltage. (2) Using the same components, only changing the input relays contact points from the utility source to contact together, the inverter can swiftly transfer the back-up battery system when the input utility source is failure. Lastly, in order to verify the proposed schemes, a 600W prototype Standby UPS system with AC voltage regulator is implemented and the experiment results show that the output voltage will keep on the normal value voltage and good transient response.

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