http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
서문준(Jun Seomun),김규식(Gyu-Sik Kim),원충연(Chung-Yuen Won),민명식(Myung-Sik Min),최규하(Gyu-Ha Choi),목형수(Hyung-Su Mok) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
In this paper, the inverter TIG (Tungsten Inert Gas) welding system with high power efficiency by means of pulse current control of welding process is presented In TIG welding, pulse current control is utilized in order to attain less spatter and high welding performance. The four factors which determine the welding performance of the pulse current are frequency, base current, peak current, and peak current duty ratio, The input power depends on base current, peak current, and peak current duty ratio, In this paper, we analyze these three factors should be controlled to achieve minimum power input. To demonstrate the practical significance of our results, we present some experimental results as well as simulation results.<br/> <br/>
반응부의 유동해석을 통한 열플라즈마 가스처리기의 효율 개선
서문준(Jun SeoMun),정진도(Jin-Do Chung),구경완(Kyung-Wan Koo) 대한전기학회 2011 전기학회논문지 Vol.60 No.3
This study explores the numerical analysis method of fluid dynamics in the reaction section to improve the gas processing efficiency in the hazardous gas removal by atmospheric thermal plasma. This study also intends to contribute in technology advance to improve the processing efficiency and make the process more stable. Numerical analysis of temperature distribution in the reaction section dependent on the change in flow velocity of Ar and plasma temperature change, which are major control variables in the cracking process of HFC-23 using arc plasma, was done. The characteristic of incoming oxygen by temperature suggested that when temperature increased to 1600K, 1700K, 1800K respectively, the range of cracking temperature 1500K increased to 75.0%, 83.3%, 90.2% respectively. The temperature change of Ar by velocity change was widest in the area higher than 1500K when the velocity was 2.5m/s; however, since there was no big difference when the velocity was 2m/s, it is believed that 2 m/s would be most proper.