| Autor: |
Y. S. Cho, M. Bland, D.M. Baca, Robert F. Gribble, D. I. Kim, H. J. Kwon, J. McCarthy, William A. Reass, K. B. Clark |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Dielectrics and Electrical Insulation. 18:1104-1110 |
| ISSN: |
1070-9878 |
| DOI: |
10.1109/tdei.2011.5976102 |
| Popis: |
This paper presents operational data and parameters of the newest generation of polyphase resonant high voltage converter modulator (HVCM) as developed and delivered to the KAERI 100 MeV "PEFP" accelerator. The KAERI design realizes improvements from the SNS and SLAC designs. The present KAERI system operates two parallel THALES TH2089F 350 MHz klystrons with total power draw of 50 amperes at 105 kV. An additional 3 klystron system operating at 105 kV and 75 A is also being considered for the high energy sections of this accelerator. In these systems, to improve the IGBT switching performance, the HVCMs will be fitted with artificial zero-voltage-switching (ZVS) networks at turn-off. This new method of artificial ZVS should result in a 6 fold reduction of IGBT switching losses. This will improve the HCVM conversion efficiency to better than 95% at full average power, which is 500 kW for the 2 klystron system and 750 kW for the 3 klystron system. The artificial ZVS is accomplished by placing a soft switching capacitor network across the resonant boost transformer primary winding. This low loss snubber circuit reduces the dv/dt across the IGBTs at turn-off. As the transformer input busswork is extremely low inductance ( |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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