電漿火炬電力供應系統-整合鐵心技術之研究

Abstract

為配合「電漿焚化熔融處理有害廢棄物產業化應用與發展」施政目標，開發高功率直流電漿電源技術，期促使國家環境保護技術朝零廢棄物的目標發展。本計劃以電磁理論、電路系統理論及有限元素數值方法進行研究，以整合鐵心技術整合電感及變壓器，達到增加能量密度及減少輸出電流漣波的目的。 使用整合鐵心技術方式(電感及變壓器共構)取代傳統兩級式串接方式的優點如下: 單級整合鐵心技術少了一個線路與元件之串聯損失，因此可順利達到增加能量密度及減少輸出電流漣波的目的，且能量只在單級中處理，而不像兩級式能量需經過兩級的處理，故效率提昇；另外，單級整合鐵心技術合併了電感及變壓器功能於單級中，體積可大幅縮小；且由於元件數目少，因此投資成本約較同樣功能的兩級式架構可大幅減少約15%以上。 目前市面上尚無模組化電漿火炬電源系統是利用整合鐵心技術方式來設計，相較於傳統兩級式轉換方式而言，通常以單級整合鐵心技術方式做為電力模組的的體積小、效率較好、成本較低，因此未來市場潛力無窮。 針對本計劃我們已成功使用兩種形式的鐵心(包括E65及 ETD44鐵心)，共構於500W順向交換式電源供應器上之變壓器，瞭解通過電晶體開關與輸出電感上之電壓電流變化。在將來下一階段之實驗，可以利用此上述實做結果，完成未來整合鐵心直流電漿火炬電源之系統電路設計基礎。

To comply with the policy of the application and development of plasma incinerating and melting, the technology of power supply for high power dc plasma is required to develop and meet the national environmental regulation of zero waste. In this research project, the related technology, specifically, the integration technology of major magnetic components such as inductors and transformer was studied. It has been reported that the power density might be increased and/or the ripple current might be decreased when the inductors and the transformers of a circuit are integrated on one single core. Using the technology of integrated core technology (inductors and the transformers on a single core ) can replace traditional The merit are the following: without cascade in integrated core technology, the circuit and the loss between serial elements is decreased, and therefore we can get the target of increasing energy density and reducing current output ripple. In addition, energy is conserved and processed in single stage instead of dispersing between two stages. The efficiency is consequently upgraded. The second point of view is that single integrated core technology can construct functions of inductors and transformers in single stage to cut down the volume substantially. Because of fewer elements, the cost may be reduced more than 15% compared with a cascade structure while implementing the some functionality. In market place, there is still no modeled plasma torch’s power supply system using integrated core technology design. Contrast to ordinary cascade transformation, single integrated core technology used as power model has less volume, better efficiency and lower cost to be promising in the future. With regard to this project, we have successfully used two kind of core ( including E65 and ETD44 core), which are on a single core in the transformers of a forward converter, to know how the voltage and current changes on transistors’ switches and the output inductor. In the following developing procedure, we can base on the experiment result described above to carry out systematic circuit design of combining integrated core technology for dc plasma torch’s power supply system in the future.