http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김만고(Marn-Go Kim),김진환(Jin-Hwan Kim),전성즙(Seong-Jeon),노의철(Eui-Cheol Nho),김인동(In-Dong Kim) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
IGBT 소자는 고전류 밀도의 특성을 지니면서 구동전력이 작기 때문에 500V 이상의 고전압 응용에서 널리 이용되고 있다. 본 논문에서는 기존의 IGBT 소자의 구동회로가 갖는 기본기능 이외에 고자에 대한 보호기능과 소자의 동작 상태를 감지하기 위한 모니터링 기능을 갖는 지능형 구동회로에 대해 제안한다. 제안된 회로는 소자에 비종상적인 큰 전류가 흐를 경우 논리 회로에 의해 게이트 구동전압을 일정시간 즉시 차단하여 소자를 과전류와 과열로부터 보호하고, 소자의 동작 상태가 정상인지 차단 상태인지 감지할 수 있다. 언급한 기능을 가진 구동회로가 제시되며, 제안된 회로의 동작은 Pspice를 이용한 시뮬레이션 및 실험을 통해 확인된다.
소나 시스템 설계를 위한 FFR 트랜스듀서 어레이의 등가회로 모델링
김인동(In-Dong Kim),최승수(Seung-Soo Choi),이학수(Haksue Lee),이승우(Seung Woo Lee),문원규(Wonkyu Moon) 대한전기학회 2017 전기학회논문지 Vol.66 No.4
Free-Flooded Ring (FFR) transducer array for use in Sonar system can be driven with large amplitude in a wide frequency band due to its structural characteristics, in which two resonances of a ring mode (1st radial mode) and an inner cavity vibration mode occur in a low frequency band. Since its sound wave generation characteristics are not influenced by the water pressure, the FFR transducer array is widely used in the deep sea. So FFR has been recognized as a low-frequency active sound source and has received much attention ever since. In order to utilize the FFR transducer array for SONAR systems in military and industrial applications, its equivalent electric circuit model is necessary especially to design the matching circuit between the driving power amplifier and the FFR transducer array. Thus this paper proposes the equivalent electric circuit model of FFR transducer array by using measured values of parameter, and suggest the improved method of parameter identification. Finally it verifies the effectiveness of the proposed circuit model of FFR transducer array by experimental measurements.
새로운 양방향 ZVS PWM Sepic/Zeta DC-DC 컨버터
金仁東(In-Dong Kim),彭盛煥(Seong-Hwan Paeng),朴成大(Sung-Dae Park),魯義哲(Eui-Cheol Nho),安珍雨(Jin-Woo Ahn) 대한전기학회 2007 전기학회논문지 Vol.56 No.2
Bidirectional DC-DC converters allow transfer of power between two de sources, in either direction. Due to their ability to reverse the direction of flow of power, they are being increasingly used in many applications such as battery charger/dischargers, de uninterruptible power supplies, electrical vehicle motor drives, aerospace power systems, telecom power supplies, etc. This paper proposes a new bidirectional Sepic/Zeta converter. It has low switching loss and low conduction loss due to auxiliary communicated circuit and synchronous rectifier operation, respectively. Because of positive and buck/boost-like DC voltage transfer function(M=D/1-D), the proposed converter is very desirable for use in distributed power system. The proposed converter also has both transformer-less version and transformer one.