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이인혁(I-H Lee),송성근(S-G Song),이상훈(S-H. Lee),박성준(S-J Park),남해곤(H-G Nam),정해덕(H-D Chung),장영학(Y-H Chang) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, we proposed the electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level PWM inverter combined with H-Bridge Inverters and Transformers. and we proposed the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype inverter to clarify the proposed electric circuit and reasonableness of control signal.
[안전부문] 유압완충기를 장착한 차량 윤한요소모델의 충돌특성에 관한 연구
최정흠(J.H.Choi),이인혁(I.H.Lee),박제승(J.S.Park),한동철(D.C.Han) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
In this paper, a study on the frontal crash behavior of car-body finite element model with hydraulic cushioner was performed. The hydraulic element were modeled mathematically. And then vehicle structure were modeled by the simplifed vehicle structure modeling method using nonlinear springs, beam elements, and hydraulic cushioner elements. The results were compared with those from the simulations at low speed(10km/h) and high speed(50km/h). At low speed, hydraulic cushioners are predominant. At high speed, the side-rails are predominant.
비선형 스프링-보 요소를 이용한 차체 모델링 및 충돌해석
강신유(S.Y.Kang),김흥수(H.S.Kim),이인혁(I.H.Lee),한동철(D.C.Han) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
Modelling and crashworthiness analysis of simplified vehicle structures with Beam element and Nonlinear Spring to which axial and bending collapse mechanism are applied are carried out. And on the basis of these analysis, Two types of Full car modelling and crashworthiness analysis with Nonlinear spring and Beam element are accomplished. The One is the Full car model of which 30% of the structures are modelled with Nonlinear spring and Beam element, and the other 75% of whole structures. And the results are compared with those of Full car analysis with Shell element.<br/>
A Study on the 3-Phase Z-Source Inverter
우도(Yu Tao),전장건(J G Jeon),정경수(K S Jeong),최형래(H L Choi),이인혁(I H Lee),박성준(S J Park),문채주(C J Moon) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
There are lots of control methods can be used in the 3-phase Z-Source inverter. In this paper several typical control methods are analyzed and compared through the simulation in the PSIM and Matlab.