주파수 가변 동기 정류기를 이용한 고효율 MHD 램프 안정기 = A High Efficiency MHD Lamp Ballast with a Frequency Controlled Synchronous Rectifier

다국어 초록 (Multilingual Abstract)

In this paper, in order to develop a simple and high efficient ballast without an external ignitor, ahalf-bridge type ballast with a coupled inductor and a frequency controlled synchronous rectifier is proposed. The internal LC resonance of the buck converter is used to generate a high voltage pulse for the ignition, and the coupled inductor filter is used for steady state ripple cancellation. Also, a synchronous buck converter is applied for the DC/DC converter stage. In order to improve the efficiency of the ballast, a frequency control method is proposed. This scheme reduces a circulation current and turn off loss of the MOSFET switch on the constant power operation, which results in increase of the efficiency of the ballast system about 4 %, compared to a fixed frequency control. It consists a 2-stage version ballast with a PFC circuit. The results are verified with hardware experiments.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. DC/AC 변환을 위한 하프 브리지 컨버터
• 3. 시뮬레이션 및 실험결과
• 4. 결론
• 참고자료