- 學位論文
並聯電壓調節器之電流分享控制
Current Sharing Control of Shunt Voltage Regulator Module
摘要
摘要 本論文中，我們提出一個簡單電流共享技術，達到兩個並聯電壓模組電流共享目的。任何電器設備都須有電源提供才能工作，許多和民生相關重要設備，如電信等皆是全天候運作，因此穩定供電十分重要。傳統由單一電源供電方式已無法滿足此一要求，為了因應此一趨勢，今日許多電源供應皆採用多模組電壓調節器並聯方式來完成。因此；各電源模組之間電流平衡控制技術是此一供電方式的重要課題。 在傳統多模組電壓調節器並聯電流平衡控制是使用電流變壓器或串一微小電阻作為電流取樣元件。此外目前在多模組電壓調節器並聯供電方式有（1）單電壓模式迴路控制（2）峰值電流模式迴路控制（3）微電腦控制模式，以上這些方式各有其不同優缺點。 本文採用R-C串聯電流取樣技術，模組取樣信號差值補償方式解決以上缺點。利用運算放大器高輸入阻抗、高增益之特性來構成一高精確之減法器，將兩電壓調節器模組輸出線圈上之直流壓降，取其差值作為各模組脈寬調整之依據，進而改變各模組之輸出電流達到各模組之間電流平衡。 本論文最後獲得之結果如下：（1）本方法在控制電路設計和實現方面非常簡易，不涉及深奧電路理論，淺顯易懂。（2）此控制電路易於積體化，符合未來應用趨勢。（3）本方式不影響電源本身效率，也無各模組元件因不對稱所造電流不平衡之缺點。
關鍵字
並聯共享並列摘要
Abstract This thesis proposes an easy way we offer to achieve the shunt voltage regulator module current sharing control. The circuit experiments are given to confirm the performance of our work. Firstly, without using traditional current transformer, current sensing resistor, we adapt the series of resistor and capacitor for current sensing network to get the current values of the two shunt voltage regulator modules. Then, we use the different value of the two currents, named as the error value. At last, the error value is feed backed to the pulse width modulation circuit to regulator the output voltage to approach the dished value. In the mean theme, the currents flowing in the two voltage regulator modules are controlled to be as equal as possible. The chief results of our work are as follows: (1) without using the current transformer, so the shunt voltage regulator size can be reduce and without using current sensing resistor for current sensing network, then reduce the power disappear therefore promote the power efficiency. (2) Using an easy circuit theory and generation components to structure the control circuit easy to understand the control circuit working. (3) The way to suit an integrated circuit in an IC chip convenient the future application.