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자료유형
학술저널
저자정보
저널정보
전력전자학회 전력전자학회논문지 전력전자학회 논문지 제4권 제4호
발행연도
1999.8
수록면
384 - 395 (12page)

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This paper deals with a fixed frequency full-bridge inverter type DC-DC high-power converter with high frequency high voltage(HFHV) transformer-coupled stage, which operates under quasi-resonant ZVS transition prinsipion in spite of a wide PWM-based voltage regulation processing and largely-changed load conditions This multi-resonant(MR) converter topology is composed of a series capacitor-connected parallel resonant tank which makes the most of parasitic circuit reactive components of HFHV transformer and two additional quasi-resonant pole circuits incorporated into the bridge legs 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 high voltage(HV) transformers which is applied for driving the diagnostic HV X-ray tube load in medical equipments It is proved from a practical point of view that the switching losses of IGBTs and their electrical dynamic stresses relating to EMI noise can be considerably reduced under a high frequency(HF) switching-based phase-shift PWM control process for a wide load setting requirements.

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ABSTRACT

1.Introduction

2.Series-Capacitor Connected Transformer Parallel Resonant DC-DC Converter

3.New Resonant Pole-assisted Multi-Resonant PWM DC-DC Converter System

4.HV Transformer for HF and High-Power Link and its Design

5.Quasi-Resonant Commutation Pole

6.Dynamical Circuit Modeling of System Components

7.Resonant Pole assisted Converter Characteristics

8.Conclusions

References

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UCI(KEPA) : I410-ECN-0101-2009-560-014213421