高效率之切換式電源供應器設計與實現

Design and Implementation of Switching Power Supply with High Efficiency

林侑禾(Yu-Ho Lin)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電資碩士在職專班研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00517

摘要

本篇論文主要設計與研製一符合高效率白金牌與能源之星規範的300瓦電源供應器。功率因數修正轉換器架構使用平均電流模式，而DC-DC轉換器架構使用半橋式串聯諧振轉換器以產生+12V輸出。半橋式串聯諧振具有零電壓切換的特性，可減少變壓器一次側開關的切換損失，並使用同步整流技術來減少二次側的導通損失。
本論文使用虹冠電子(Champion Microelectronic)之IC CM6502T以及CM6901 為控制器。CM6502T可控制PFC進行二段升壓功能，以智慧控制方式改善輕載與中載效率。而CM6901控制IC可操作在SRC模式下，並具有同步整流技術的功能，配合CM6502T的二段式升壓功能，進一步提升轉換器之效率。再者，所研製之電源供應器使用一返馳式轉換器來提供待機與輔助電源之供給。
最後實際測量實驗數據並驗證本論文之電源供應器系統，其待機效率可滿足能源之星的規範，整體效率以及功率因數可符合白金牌之要求。

關鍵字

高效率 ； 能源之星 ； 功率因數修正轉換器 ； 半橋式串聯諧振轉換器 ； 零電壓切換 ； 同步整流

並列摘要

The subject of this thesis is to design and implement a 300-watt high efficiency power supply satisfying the Energy Star standard. The used power factor corrector (PFC) is controlled under the average current control mode, and the DC-DC post-regulator is a half-bridge series resonant converter (SRC) to generate the desired +12V output voltage. The half-bridge series resonant has a feature of zero voltage switching (ZVS), which can reduce the switching loss on primary side of the transformer. On the secondary side, the synchronous rectification (SR) technology is used to reduce the conduction loss on secondary side.
In this thesis, ICs CM6502T and CM6901 available from Champion Microelectronic are used as the PWM controller. The control IC CM6502T can be utilized for PFC to perform the required two-step boost voltage function, and significantly improve the efficiency under light-load and half-load situations. The other control IC CM6901 can operate in SRC mode, and execute the synchronous rectification function, in which the unique frequency modulation is used to improve the conversion efficiency. A flyback converter is provided to act as the standby and auxiliary power supply.
Finally, a 300-watt power supply is implemented and the actually measured data are conducted to verify the theoriecal analysis and design. The performance of the implemented power supply can satisfy the Energy Star standard, the measured efficiency and power factor both can confirm with the platinum requirement.

並列關鍵字

High efficiency ； Energy Star ； power factor correction ； half-bridge series resonant converter ； zero voltage switching ； synchronous rectification

參考文獻

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