低壓大電流輸入推挽式轉換器研製

Kun Shan University Institutional Repository > 研討會 > 教學單位 > 工程學院 > 電機工程系所 > 2008第七屆台灣電力電子研討會暨展覽會 > Item 987654321/7904

Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/7904

Title:	低壓大電流輸入推挽式轉換器研製 Study and Implementation of a Low-Input-Voltage and High-Input-Current Push-Pull Converter
Authors:	曾柏榮(Po-Jung Tseng) 柯祈佑(Ci-You Ke) 羅有綱(Yu-Kang Lo) 邱煌仁(Huang-Jen Chiu)
Keywords:	推挽式轉換器低壓大電流輸入 Push-pull converter low input voltage and high input current
Date:	2008-09-05
Issue Date:	2010-01-12 14:19:22 (UTC+8)
Abstract:	本文主要研製一台1200W輸出的DC/DC 轉換器，採用的架構為推挽式轉換器型式。文中針對推挽式轉換器型式進行電路分析。以電池為電源的轉換器，在高功率輸出時因為低壓輸入所以輸入電流會相對提高許多，若使用傳統的推挽式轉換器，因為開關切換為硬性切換，一次側繞組的漏電感會造成電壓突波，且因為輸入大電流，電壓突波將會相對提高。要解決此問題須增強緩振電路的處理電壓突波能力，緩振電路所消耗的功率也將提高，而使轉換器的整體效率降低。本文藉由輸入電感、諧振電容與變壓器一、二次側漏電感形成諧振，使開關在電流降至較小值時截止，減少電壓突波與緩振電路所消耗的功率，以提昇轉換器效率。最後並實作一部1200W 之推挽式轉換器，利用實測結果驗證理論。 This thesis mainly studies and implements a 1200-W DC/DC push-pull converter. The circuit analysis of a push-pull converter is discussed. The presented converter uses the battery as the power source, such that for high power output and low input voltage, its input current will be extremely large. For a conventional push-pull converter, the primary leakage inductance of the transformer will cause a very high voltage spike due to hard switchings of the switch devices. To solve this problem, a snubber circuit must be added, meaning that the power loss in the snubber circuit consequently decreases the overall converter efficiency. By using the input inductor, the resonant capacitor and the primary and secondary leakage inductors of the transformer to form a resonant tank, the switch can be turned off at its lowest current. Therefore the voltage spike of the switch is reduced and the power loss of the snubber circuit is diminished. Design issues of the presented push-pull converter are presented in this thesis. By setting the input inductance and the resonant capacitance, other component parameters can be calculated. Finally, a 1200-W push-pull converter is implemented. Experiments are conducted to verify the heoretical analysis.
Relation:	台灣電子電力研討會暨展覽會
Appears in Collections:	[電機工程系所 ] 2008第七屆台灣電力電子研討會暨展覽會

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