以微控制器實現低待機損耗之返馳式轉換器

本文主旨在針對SPS（Switching Power Supply）的待機損耗做改善，並利用微控制器搭配藍牙裝置與現階段熱門的智慧型手機或平板來實現嶄新的監控功能，雖然目前現有的類比IC在此部份的技術已經相當的純熟，然而使用微控制器的方式除了其發展是一種未來的趨勢外，更可引入新的待機損耗改善方向。論文中主要是使用Arduino此一模組化的微控制器，做為AC-DC返馳式轉換器的核心，藉此來取代原有的類比IC控制器。為達到低待機損耗，主要是藉由降頻的方式以及在待機時段調控輸出電壓，且精凖地控制開關的責任週期，使其切換及傳導損失達到最小。最後的實驗結果待機損失可遠小於目前能源之星的規範。另外可以調控輸出電壓，可使轉換器分別輸出兩種不同的使用電壓，而當待機時會自行將輸出電壓降低至5V，使轉換器的待機損耗降至最低。而以上的功能都可透過APP結合手機或平板以無線的方式進行操控。本論文發展的技術展現出數位微控制器的優勢，藉由其精凖的控制能力以及其強大的擴充性，不僅在能耗上勝過類比技術，更提供了類比技術無法實現的人性化互動式操控功能。

關鍵字

待機； Arduino ；降頻；電壓調控； APP

並列摘要

This thesis focuses on improvement of SPS (Switching Power Supply) standby power loss and use mircroprocessor with Bluetooth module to realize new monitor function on mobile phone or tablet PC. Currently there are already a lot of analogue ICs are applied at this field. But using microprocessor is future trend and new standby power loss improvement direction can be introduced. Instead of using analogue ICs, Arduino is the microprocessor applied at this thesis as the core of flyback converter. Frequency reduction, output voltage modulation at standby mode and precisely control switch duty cycle are used to minimize switching and transmission power loss. Final experimental result shows that the power loss is much smaller than energy star specification. Besides that, output voltage can be adjusted to enable the converter to output two kinds of voltage. At standby mode, the converter will automatically reduce output voltage to 5V to minimize converter standby power loss. Functions mentioned above can be wirelessly controlled by mobile phone or tablet PC throught APP. The technique applied at this thesis shows the advantages (expandable and with good control capability) of digital controller. Digital controller with good interactived control capability and less power loss which is much better than analogue technique.

並列關鍵字

Standby power ； Arduino ； Frequency reduction ； Voltage control ； APP

參考文獻

[4] J.H. Kim, M.H. Ryu, B.D. Min, and E.H. Song, “A Method to Reduce Power Consumption of Active-Clamped Flyback Converter at No-Load Condition”, IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on Paris, 2006.pp.2811-2814.

[5] B.C. Kim and K.B. Park and G.W. Moon, “Sawtooth burst mode control with minimum peak current in stand-by operation of power supply”, Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on, Jeju , 2011. pp.474-479.

[7] S. Zhou and B. Liu, “Design of 80W Two-Stage Adapter with High Efficiency And Low No Load Input Power”, Applied Power Electronics Conference and Exposition, 2002, APEC 2002, Seventeenth Annual IEEE, Vol. 2, Mar 2002, pp.728 - 732.

[8] J.H. Choi, D.Y. Huh and Y.S. Kim, “The Improved Burst Mode in the stand-by operation Of Power Supply”, Applied Power Electronics Conference and Exposition, 2004, APEC '04, Nineteenth Annual IEEE, Vol. 1, 2004, pp.426-432.

[9] Y.K. Lo, S.C. Yen and J.Y. Lin, “A High-Efficiency AC-to-DC Adaptor with a Low Standby Power Consumption”, Industrial Electronics, IEEE Transactions on Volume: 55, Feb. 2008.pp.963 – 965.

國際替代計量

以微控制器實現低待機損耗之返馳式轉換器

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