| Summary: | 碩士 === 國立臺灣海洋大學 === 電機工程學系 === 94 === The purpose of this thesis is based on the circuit structure of off-line flyback converter. And utilize the auxiliary winding to achieve power factor correction and battery charging. This mainly research direction is focus on popularization of the personal computer, when power breaking off, the user is unable backup the data immediate, therefore creates the puzzle, this time the user must add a AC/AC UPS in order to increase the backup time of 1~2 minutes. But this way is not only increases the extension construction cost, but creates the waste on the power source transforming.
The construction of this thesis, is mainly on AC/DC power converter with UPS characteristic , it is directly established in the personal computer power supply, with reduced the extra AC/AC UPS equipment cost, can provide the user more chance. In addition to use the power correction technology to improve the whole efficiency.
This thesis will coordinate the textbook theory and match the inferential reasoning formula as well as the IsSpice computer simulation. Finally we confirms this electric circuit usability by many times of actual verifications.
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