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하이브리드 에너지 저장장치 탑재 전동차의 전력 분배 방안 연구
이지호(Jeeho Lee),이형철(Hyeongcheol Lee),오용국,Jaeho Kwak 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Railway vehicle engineers are studying high efficient traction systems to reduce CO2 gases. Equipping energy storage systems on Vehicles are one of remarkable methode to improve high efficient of railway systems. In this paper, railway vehicle, battery/catenary/Ucap models were built. Power distribution-algorithm which is electric power distribution strategies for some energy source topology between battery, Ucap and catenary was developed and simulated. If characteristics of battery, Ucap and catenary are reflected in the power distribution algorithm, running efficiency of railway vehicles will increase remarkably.
HIL 시뮬레이션에 의한 하이브리드 에너지 저장장치 탑재 전동차의 가능성 연구
이지호(Jeeho Lee),전남주(Namju Jeon),이형철(Hyeongcheol Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This paper represents a way to build hardware-in-the-Loop (HIL) simulation system for feasibility study of an electric railway vehicle with onboard energy storage system. The energy storage system consists of the battery and the ultra-capacitor in parallel. The dynamical analysis of the subsystems such as railway vehicle and energy storage system is performed and the simulation program of the target is obtained from the mathematical models of the subsystems. Traction motor model of railway vehicle consists of small size testbench. Torque transducer is coupled between traction motor and load motor which generate load torque for traction motor on the testbench. HIL simulation system consists of testbench and simulation program which contains model of subsystems. HIL simulation result shows that hybrid energy storage system can supply required electric power from traction motor and make synergistic effect from two different power sources.
이지호(Jeeho Lee),이형철(Hyeongcheol Lee),곽재호(Jaeho Kwak) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Railway vehicle engineers are studying high efficient traction systems to reduce CO2 gases. A vehicle with On-board is one of remarkable methode to improve high efficient railway system. In this paper, railway vehicles, battery/catenary models were built and power distribution-algorithm which is electric power distribution rules between battery and catenary was developed and simulated. If characteristics of battery and catenary are reflected in the power distribution algo vehicle’s running efficiency will increases remarkably.
전기굴삭기 효율향상을 위한 전기동력시스템 동작점 제어알고리즘 연구
이지호(Jeeho Lee),이형철(Hyeongcheol Lee),염준형(Joonhyung Yeom),이상훈(Sanghoon Lee) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The working time of electric excavator needs to be extended by improving efficiency of the electric power system. In this paper, the characteristics and efficiency maps of tandem pump-electric motor system is analyzed and the control algorithm which optimize the displacements of the tandem pump is established. To confirm the utility of this algorithm, the model-in-the-loop simulator of electric excavator for the algorithm is established. The simulation results shows that the control algorithm improved the energy efficiency of the electric excavator.
전기굴삭기 에너지 효율 향상을 위한 유압펌프 - 전동기 통합 제어 알고리즘
이지호(Jeeho Lee),이지혜(Jihye Lee),이형철(Hyeongcheol Lee),오창은(Chang Eun Oh) 대한기계학회 2015 大韓機械學會論文集A Vol.39 No.2
전기굴삭기는 배터리에 저장된 에너지로 전동기-유압펌프를 구동해서 유압 에너지를 생성하고 이를 작업에 활용한다. 기존 유압굴삭기의 유압펌프는 디젤 엔진의 운전 효율에 최적화된 레귤레이터에 의해 제어되고, 유압펌프 자체의 효율은 고려되지 않았다. 전기굴삭기는 배터리를 에너지원으로 사용하기 때문에 전동기의 효율뿐 아니라 유압펌프의 효율을 함께 고려한 제어가 요구된다. 통합 제어를 위해서 유압펌프와 전동기의 출력과 효율 특성을 분석하여 효율맵을 작성하였고, 이를 바탕으로 최적동작맵을 구성하고 통합 제어 알고리즘을 개발했다. 알고리즘의 효과를 확인하기 위해 전기굴삭기 MILS 를 구성해서 통합 제어 알고리즘을 적용했다. 굴삭기 작업 시뮬레이션 결과는 통합 제어 알고리즘이 시스템 효율을 향상 시켰음을 보여준다. An electric excavator consumes battery energy to drive an electric motor attached to a hydraulic pump to generate hydraulic power. In a conventional hydraulic excavator, the hydraulic pump is controlled by regulators, which are used to optimize the diesel engine efficiency. Because of a lack of battery energy capacity, an electric excavator controller should consider not only the electric motor efficiency but also the hydraulic pump efficiency. Thus, electric motor and hydraulic pump efficiency maps were constructed. An optimal operating map (OOM) was created based on the most efficient operating points under each input condition. An integrated control algorithm controlled the speed of the electric motor and displacement of the hydraulic pump according to the OOM. To confirm the utility of this algorithm, a model-in-the-loop simulator for the algorithm with an electric excavator was established. The simulation results showed that the integrated control algorithm improved the energy efficiency of an electric excavator.