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Multi-Resonant Soft-Switching PWM DC-DC High-Power Converter with Quasi Resonant-Poles and Resonant AC Tank using interal Parasitic Circuit Components....
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| Author(s) |
Y. J. Kim; M. Michihira; M. Nakaoka |
| Abstract |
This paper deals with a fixed frequency phased-shifted PWM multi-resonant (MR) inverter type DC-DC high-power converter with two HFHV transformers-coupled stage, which operates under ZVS transition principle in spite of a wide PWM-based voltage regulation processing and largely-changed load conditions. This MR converter topology is composed of series capacitor-connected parallel resonant tank which makes the most of parasitic circuit components of two HV transformers, and two additional quasi-resonant pole circuits incorporated into the bridge. The soft-switching operation and practical efficacy of this new converter circuit using the latest IGBTs are actually ascertained through 50KW-120KV trially-produced converter system operating using 20KHz/30KHz HV-transformers which is applied for driving diagnostic HV X-ray tube load in medical equipments. It is proved from a practical point of view that the switching losses of lGBTs and their electrical dynamic stresses relating to EMI noise can be considerably reduced under a HF switching-based upon which is phase-shift PWM control process for a wide load setting requirements. |
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| Filename: | Unnamed file |
| Filesize: | 4.494 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-05-22 by System |
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