以數位化實現具零電流零電壓柔切式升壓型轉換器

Digital Realization of ZCS-ZVS Boost Converter

黃主恩(Zhu-En Huang)

指導教授 ： 胡國英

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2009年)

摘要

傳統升壓型轉換器由於線路或開關存在有寄生元件，故開關切換時並非理想，開關上的電流及電壓無法瞬間由零升到定值，或由定值瞬間降到零，造成了切換損失，故切換頻率愈高，切換時損失愈大，導致切換頻率無法有效地提升。有鑑於此，故本篇論文提出一具有柔式切換(Soft Switching)之升壓型轉換器(Boost Converter)，結合半共振(Quasi-Resonant Converter, QRC)及零電壓移轉(Zero Voltage Transition, ZVT)技術，以實現開關之零電壓切換(Zero Voltage Switching, ZVS)及零電流切換(Zero Current Switching, ZCS)的目的。由於開關可以在零電壓切換及零電流切換，因此可以提高轉換器的切換頻率，解決傳統升壓型轉換器之高切換損失的問題，進而提升轉換器整體的效率。於本論文中，藉由IsSpice模擬及實作以驗證所提架構之可行性及有效性，並以場效可規劃邏輯閘陣列(Field Programmable Gate Array, FPGA)實現全數位化控制，使得輸出電壓儘可能地不受輸入電壓變動及負載變動的影響。

關鍵字

升壓型轉換器 ； 柔式切換 ； 半共振 ； 零電流切換 ； 零電壓切換 ； 場效可規劃邏輯閘陣列 ； 全數位化控制

並列摘要

As generally acknowledged, the current in and voltage on the switch can not instantaneously go from zero to a fixed value or from a fixed value to zero, and hence there exists switching loss in the boost converter. The higher the switching frequency is, the more the switching loss, thereby causing the switching frequency not to be increased effectively. Base on the mention above, a soft-switching boost converter is presented herein along with quasi-resonance and zero-voltage-transition techniques, so as to realize the zero voltage switching (ZVS) during the turn-on period and the zero current switching (ZCS) during the turn-off period. By doing so, the efficiency of the overall system can be upgraded. In this thesis, the feasibility and effectiveness of the proposed structure topology are verified by IsSpice and the field programmable gate array (FPGA), respectively. Furthermore, under fully-digitalized control, the output voltage is affected by variations in input voltage and load current as little as possible.

並列關鍵字

Boost Converter ； Soft Switching ； Quasi-Resonance ； ZVT ； ZVS ； ZCS ； FPGA ； Fully-Digitalized Control

參考文獻

[1] 劉育伶，非浮接開關之零電流零電壓轉移柔切式升壓型電力轉換器之分析研製及控制器設計，碩士論文，國立成功大學工程科學系，2002。

[3] Rui Liu and C. Q. Lee, “Experimental investigation of the LLC-type parallel resonant converter,” IEEE APEC’90, vol. 10, pp. 723-732, 1990.

[5] Z. M. Ye, P. K. Jain and P. C. Sen, “Two stage resonant inverter for AC distributed power supply,” IEEE IECON, vol. 1, pp. 239-244, 2004.

[6] Z. M. Ye, P. K. Jain and P. C. Sen, “Two stage resonant inverter for AC distributed power supply-topology featured with zero voltage switching,” IEEE IECON’04, vol. 1, pp. 227-232, 2004.

[7] Jianbing Li, Zhongxia Niu, Dongfiang Zhou and Yujie Shi,“Analysis of series-parallel resonant converter with multipliers,”IEEE ISCAS’05, vol. 5, pp. 4449-4452, 2005.