http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이현우(H.W.Lee),장진혁(J.H.Jang),김인수(I.S.Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
The aerodynamice of real cars is strongly influenced by both individual details and many functional aspects like front hood shape, windshield shape, trunk height, rear glass angle, etc. But the basic shape has a considerable infuence on the final aerodynamic characteristics. To evaluate the effect of various shape parameters on aerodynamic drag, a simplified 1/4-scale model with interchangeable body parts was made and tested in the wind tunnel. The aim of this paper is to suggest optimal dimension of the body shape of the car for low drag car and to study the effect of body dege shape in view of low aerodynamic drag.<br/>
유도 전동기의 외란 상쇄 관측기를 이용한 부하토오크 제어에 관한 연구
황락훈(L. H. Hwang),장진혁(J. H. Jang),나승권(S. K. Na),김영수(Y. S. Kim),조문택(M. T. Cho),송호빈(H. B. Song) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
This paper designed a robust control of an induction motor using a disturbance cancellation observer of a feedforward control. The speed response of conventional PI controller characteristic is affected by variations of load torque disturbance. In the proposed system, the speed control characteristic using a feedforward control isn't affected by a load torque disturbance. High speed calculation and processing for vector control is carried out by ADMC300 digital signal processor. Validity of the proposed control method is verified through simulation and experimental result.
위치 추적기를 사용한 태양광 발전의 전력 변환시스템 특성에 관한 연구
황락훈(L. H. Hwang),장진혁(J. H. Jang),나승권(S. K. Na),김영수(Y. S. Kim),안익수(I. S. Ahn),조문택(M. T. Cho),송호빈(H. B. Song) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper, I used microprocessor and sensor and designed to improve the efficiency of the photovoltaic system the photovoltaic position tracker device, and compared the normal photovoltaic system of fixed form with the photovoltaic system of solar position tracked form. Moreover, compared the catalogue of solar cell module and the simulation through a mathematics modelling with the solar cell's characteristic interpreting and, composed an power conversion system with boost converter and voltage source inverter. Used the constant voltage control method for maximum power point tracking in boost converter control and, used the SPWM(Sinusoidal Pulse Width Modulation) control method in inverter control.
황락훈(L. H. Hwang),장진혁(J. H. Jang),나승권(S. K. Na),김영수(Y. S. Kim),안익수(I. S. Ahn) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Currently the settlement system which is used at credit card settlement from the member store of the off-line credit card is composed of the credit card settlement terminal, the VAN company which does a settlement relay service and the credit card company. When the obstacle occurs from the credit card company, the VAN company which does a settlement relay service conducts an approval vicarious execution, but when the obstacle occurs from the VAN company, the credit card settlement service is not accomplished smoothly. The dissertation proposes the credit card settlement system which receives a settlement relay service that credit card settlement terminal uses a telegram conversion Agent from other VAN company when the VAN company obstacle occurs.
압전 변압기를 이용한 35W(T5)급 형광등 안정기 구동 시스템 특성에 관한 연구
황락훈(L. H. Hwang),장진혁(J. H. Jang),나승권(S. K. Na),김영수(Y. S. Kim),안익수(I. S. Ahn),조문택(M. T. Cho),송호빈(H. B. Song) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this study, in order to solve these problems, a new type of electronic ballast, which is composed of rectifier, active power factor corrector, series resonant half bridge inverter and piezoelectric transformer, was proposed for driving T5 fluorescent lamp. Driving of piezoelectric transformer was carried out with input region for the ring electrode and output region for the dot electrode. A 35W (T5) fluorescent lamp was successfully driven by the fabricated ballast with piezoelectric transformer.