非隔離型雙向轉換器研製

Design and Implementation of a Non-isolated Bidirectional Converter

紀欣亞(Hsin-Ya Chi)

指導教授 ： 吳財福

國立中正大學/工學院/電機工程學系/碩士(2012年)

摘要

本研究研製一部可應用於直流供電系統之非隔離型雙向直流/直流轉換器，其電路架構為升壓轉換器(Boost converter)與降壓轉換器(Buck converter)的結合，具有高轉換效率、低成本、體積小的特性。轉換器之控制採用單晶片dsPIC30F2023來調變切換元件之脈波寬度(Pulse-Width Modulation, PWM)、執行類比數位轉換以及電路保護機制等功能。當直流鏈端(高壓側)之能量大於負載所消耗能量且電池側(低壓側)電壓過低時，其轉換器操作在降壓模式；當直流鏈端(高壓側)能量不足且電池側(低壓側)電壓夠高時，其轉換器操作在升壓模式，供給直流鏈端(高壓側)所需能量；當電池側(低壓側)電壓正常且直流側能量充足時，轉換器則停止動作。最後實際製作一部6 kW之轉換器，並藉由實測結果來驗證此架構的功能以及適用性。

關鍵字

雙向轉換器 ； 直流/直流轉換器

並列摘要

This thesis presents design and implementation of a non-isolated bidirectional DC/DC converter with high efficiency, low cost and small volume for DC power system applications. The topology of this circuit is a combination of a buck converter and a boost converter. In the circuit, a dsPIC30F2023 chip realizes almost all of the functions, such as circuit protection, generation of pulse-width modulation (PWM) signals and A/D conversion, etc. If the load voltage drops below the set point, the converter operates in buck mode to regulate the load voltage. If the load power is higher than the desired value and the voltage at the battery side is low, the converter operates in boost mode. If the load voltage and the battery voltage are regulated within the desired ranges, the converter operates in idle mode. Finally, we implemented a 6 kW non-isolated bidirectional DC/DC converter to verify the feasibility and characteristic of the circuit.

並列關鍵字

bidirectional converter ； DC/DC converter

參考文獻

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