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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2004.10
- 수록면
- 239 - 245 (7page)
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This paper presents a new circuit topology of DC busline switch-assisted full-bridge soft-switching PWM inverter type DC-DC power converter which is composed of conventional voltage source full-bridge type high frequency PWM inverter in addition to a single DC busline side power semiconductor switching device for PWM scheme and a capacitive lossless snubber. Under the newly-proposed high frequency inverter link DC-DC high power conditioning and processing circuit, all active power switches in the full-bridge arms and DC busline can achieve ZVS/ZVT turn-off commutation operation. On the other hand, although the conduction power loss of DC busline switch increases a little, the total turn-off switching losses of full-bridge type PWM inverter and DC busline switch with the single lossless capacitive snubber parallel with DC busline can be significantly decreased. As a result, the switching frequency of high frequency inverter power stage using IGBTs can be actually selected under a condition of switching frequency more than about 10kHz. The more the switching frequency of full-bridge inverter increases, the more newly-proposed soft-switching DC-DC power converter with a high frequency transformer link has remarkable advantage as for the power conversion efficiency and power density as compared with the conventional hard-switching inverter type DCDC
power converter. The effectiveness of this new converter topology is proved for low voltage and large current DC power supplies from a practical point of views.
power converter. The effectiveness of this new converter topology is proved for low voltage and large current DC power supplies from a practical point of views.
목차
Abstract
Ⅰ. Introduction
Ⅱ. Circuit Description and Unique Features
Ⅲ. Operation Principle
Ⅳ. Experimental Results and Discussions
Ⅴ. Conclusions
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