http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
새로운 능동형 커먼 모드 전압 감쇄기를 이용한 고주파 누설전류 억제
구정회(Jeong-Hoi Gu),빈재구(Jae-Goo Bin),박성준(Sung-Jun Park),김철우(Cheul-U Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper propose a new active common-mode voltage damper circuit that is capable of suppressing a common-mode voltage produced in the PWM VSI. The new active common mode voltage damper is consisted of a half-bridge inverter and a common mode transformer with a blocking capacitor. Principle of the active common mode damper is as follow, by applying the compensation voltage which has the same amplitude and opposite polarity to the PWM inverter system. So, common mode voltage and high frequency leakage current can be reduced Simulated and experimental results show that common-mode voltage damper makes contributions to reducing a high frequency leakage current and common-mode voltage.
이진욱(Jin Wook Lee),정우현(Woohyun Jung),정석우(Seok Woo Chung),김태호(Tae Ho Kim),구정회(Jeong Hoi Goo) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
CFD simulation has been applied many engineering areas such as automobile, electronics and so on, including energy industry. In this study, CFD analysis and its application to the energy industries, especially for the design of reactor design, has been carried out. CFD analyses for the furnace of fossil power plant and combustion chamber of incineration plant have been done to check appropriacy of geometrical design and/or given operating condition. These analyses were research oriented because of dificulties to take risk of modifying large size plant. However, CFD analysis results of SCR reacor and/or its auxiliary equipments were directly used for the basic design because analysis itself is very easy due to its simple fluid flow behavior without chemical reaction. CFD analysis of coal gasification was conducted to develop entrained bed coal gasifier based on new concept of compactness. Aspect ratio of 3 ton/day-scale gasifier was checked and swirl angle of multiple-burners was designed from the CFD results. High cold gas efficiency and carbon conversion were achieved within short residence time.