A High Efficiency and High Power Chopper Circuit QRAS using Soft Switching and the Test Evaluation at 8kW

다국어 초록 (Multilingual Abstract)

This paper is a record of the study on a high efficiency and high power chopper based on the new soft switching method QRAS (Quasi-resonant Regenerating Active Snubber) aimed for the fuel cell electric vehicle (FCEV). This power chopper is basically proposed for the 25kHz soft switching.<br/>
For confirming the practical effectiveness of the converter, the fabrication of a prototype-model using IGBTs has been completed and the 8kW rating test, light load test, current discontinuous mode test and test out of resonance stable operation have been completed. The circuit geometry, the basic operation, the 8kW one-tenth-prototype test results are reported, and 97.5% efficiency was measured.

목차 (Table of Contents)

• Abstract
  
• Ⅰ. INTRODUCTION
  
• Ⅱ. A HIGH EFFICIENCY AND HIGH POWER CHOPPER CIRCUIT REQUIREMENTS
  
• Ⅲ. USUAL CHOPPER CIRCUITS
  
• Ⅳ. NEW CIRCUIT OF QRAS TYPE SOFT SWITCHING DC CHOPPER
  
• Ⅴ. 8KW ONE-TENTH-MODEL FOR EXPERIMENTS
  
• Ⅵ. APPLLYING QRAS SCHEME TO THE 6 BASIC CONVERTERS
  
• Ⅶ. CONCLUSION
  
• ACKNOWLEDGMENT
  
• REFERENCES