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DEAS(Dynamic Encoding Algorithm for Searches)를 이용한 풍력발전기 최적설계
정호창(Hochang Jung),이철균(Cheol-Gyun Lee),김종욱(Jong-Wook Kim),김은수(Eunsu Kim),정상용(Sang-Yong Jung) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4
Optimal design of the direct-driven PM Wind Generator, combined with DEAS(Dynamic Encoding Algorithm for Searches) and FEM(Finite Element Method), has been proposed to maximize the Annual Energy Production(AEP) over the whole wind speed characterized by the statistical model of wind speed distribution. In particular, DEAS has been contributed to reducing the excessive computing time for the optimization process.
HILS기반 하이브리드 차량용 전기구동시스템 성능평가 및 결과분석
정호창(Hochang Jung),이종인(JongIn Lee),안지현(Jihyun Ahn),김덕진(Deokjin Kim),오광철(Kwang Chul Oh),이춘범(Chun-Beom Lee),정상용(Sang-Yong Jung) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.4
Currently, green car is dramatically developed by focusing on the heavy duty vehicle such as city and shuttle bus. In particular, motor and inverter for HEV(Hybrid Electric Vehicle) are getting the spotlight in the eco-friendly vehicle as a main propulsion system. Also, test technologies based on HILS(Hardware-in-the-loop) are rapidly developed for the reliability and accuracy of the motor drive system. In this paper, transient dynamo test based on HILS is performed to analyze the transient characteristics of motor and inverter for HEV.
김덕진(Deokjin Kim),정호창(Hochang Jung),오광철(Kwangchul Oh),김진완(Jinwan Kim) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.5-2
Since traction motors for powertrain of electric vehicles have a wide operating range, they are not equally efficient at every speed and torque condition. Typically, powertrain system of electric vehicles consists of traction motor and single speed gearbox, but this configuration is not enough to get optimal fuel economy and driving performance for real-world driving cycles which have different characteristics simultaneously. A multi-speed configuration of powertrain could reduce the electric energy consumption without degradation of drviving performance, evne if the traction motor power is reduced.
차량 시뮬레이션을 통한 전기버스 성능 분석 및 도심노선 운행 적합성 연구
유태현(Taehyun Yu),정호창(Hochang Jung),김덕진(Deokjin Kim) 한국자동차공학회 2022 한국 자동차공학회논문집 Vol.30 No.5
The energy consumption efficiency of electric buses in large cities changes according to the traffic flow, so it is difficult to predict electricity consumption efficiency accurately. Therefore, in this paper, a vehicle simulation model was established based on Bangkok’s busy city bus routes, and verified the vehicle simulation model through vehicle-based, actual vehicle tests. A power system model for vehicle simulation was established based on the specifications of electric buses and their component parts, and the basic power performance of the electric buses, such as max traction, max speed, and climbing performance, was analyzed. To verify the final vehicle simulation model, a correlation test was conducted, and compared to the actual vehicle test result of the electric bus. The chassis dynamometer-based actual vehicle test was conducted based on the KATECH-G driving mode that was developed to reflect the characteristics of bus operations in Seoul, the WHVC driving mode that reflects the characteristics of roads in major countries around the world, and a constant speed driving mode. As a result, the performance prediction results of the power and electrical energy consumption efficiency of the vehicle simulation model were verified. Furthermore, a representative driving route was selected based on the location and altitude information of the city bus routes to review the suitability of electric bus operations in Bangkok, Thailand. The selected driving route was corrected for data accuracy in some sections that were distorted through the driving data in actual roads. Through this process, a driving scenario based on the characteristics of the city bus route was established, while electric energy consumption efficiency and compatibility of electric bus operations to the city routes of electric buses were derived through vehicle simulation.