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池昇昱(S. W. Jee),李春夏(C. H. Lee),金忠年(Ch. N. Kim),李廣植(K. S. Lee),沈光烈(K. Y. Sim) 대한전기학회 2006 전기학회논문지C Vol.55 No.2
Most of electric accidents are happened in the place where activities are frequent by common people who has low electric knowledge. Also, accidents are increased in the low voltage electric equipment. So, it is increased to spread the dispersion or non-utility power generation system. It means that ordinary times observation is required for electric equipments by common people. This paper is studied for the diagnosis method of electric equipment that common people can diagnose easily. Voltage is generally and exactly measured in the electric and electronic field. We suggest new analysis tools using only electric voltage. It is called the Time-Energy analysis. The Time-Energy analysis is as following First, divide measured voltage waves into same parts, Second, conducted FFT(Fast Fourier Transform) transform for each divided period, Finally, each results are reassembled after graphic treatment. We compared Time-Energy analysis with discharge form by tracking tester. As the result, tracking discharge processes distinguished clearly.
Half-Bridge형 시분할방식 고주파 공진 인버터의 특성해석에 관한 연구
조규판(G. P. Cho),신금향(G. H. Shin),원재선(J. S. Won),김동희(D. H. Kim),노채균(C. G. Ro),심광렬(K. Y. Sim),배영호(Y. H. Bae) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
A high frequency resonant inverter consisting of three unit half-bridge serial resonant inverter used as power source of induction heating at high frequency is presented in this paper. As a output power control strategy, time-sharing gate control method is applied. The analysis of the proposed circuit is generally described by using the normalized parameters. Also, according to the calculated characteristics value, a method of the circuit design and operating characteristics of the inverter is proposed. This paper proves the validity of theoretical analysis through the experiment. This proposed inverter show that it can be practically used in future as power source system for induction heating application, DC-DC converter etc.