http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A Novel Circuit for Characterization Measurement of SiC Transistors
Guo-en Cao,Hee-Jun Kim,Jeawoo Lim 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.10
This paper proposes a test circuit for SiC transistors. On-state resistance under practical application conditions is an important characteristic for the device reliability and conduction efficiency of SiC transistor. A soft-switching converter based on synchronous buck topology is developed to provide high-voltage and high-current stresses for the SiC transistor. In order to achieve accurate measurement of on-resistance under switching operations, an active clamp circuit is employed. Operation principle and analysis of the measurement circuit are discussed. The on-resistance measurement method is illustrated in detail. Experiments were carried out to verify the feasibility of the circuit. Experimental results confirm that the proposed circuit gives a good insight of the devices performance in real applications.
A Wireless Power Transfer System Based on Inductive Coupling
Guoen Cao,Hee-Jun Kim,Jeawoo Lim 대한전기학회 2014 대한전기학회 학술대회 논문집 Vol.2014 No.4
This paper proposed a high-power and high-efficiency wireless power transfer system based on inductive coupling. The system consists of a transmitter resonant inverter, a electromagnetic induction link, and a receiver rectifier. The transmitter is based on a full-bridge phase shift inverter, while the inductive link is composed of two LC resonators as loosely coupled inductors. To improved the performance of the system, modeling method of the magnetically coupled link is proposed and analyzed. A 20W prototype circuit is developed and the performance of the proposed system has been studied for experimental verification. The results show that the system efficiency is up to 65% at full load.