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정경훈(Kyunghun Jung),이영훈(Younghun Lee),조성국(Seongkook Cho),조경석(Kyungseok Cho),박창호(Changho Park) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.5-2
As key industry, the automobile industry is a technology-intensive industry developing rapidly to comply with the demands of consumer. In this paper, the motor development of high voltage cooling fan motor for fuel-cell electric vehicle is presented. In the first place, optimal design of the motor has been conducted. In order to find optimal solution. RSM was used and Output power, Torque-Ripple, Cogging-Torque were considered in optimization process. Also, stress simulation was conducted to prevent the problems in mass production. Finally, through the comparison between simulation results and experimental ones, the validity of design process is verified.
정경훈(Kyunghun Jung),김태완(Taewan Kim),조경석(Kyungseok Cho),박창호(Changho Park) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
As key industry, the automobile industry is a technology-intensive industry developing rapidly to comply with the demands of consumer. In this paper, the motor development of high voltage cooling fan motor for fuel-cell electric vehicle is presented. In the first place, optimal design of the motor has been conducted. In order to find optimal solution, RSM was used and Output power, Torque-Ripple, Cogging-Torque were considered in optimization process. Also, stress simulation was conducted to prevent the problems in mass production. Finally, through the comparison between simulation results and experimental ones, the validity of design process is verified.
정경훈(Kyunghun Jung),조성국(Seongkook Cho),조경석(Kyungseok Cho),박창호(Changho Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
As key industry, the automobile industry is a technology-intensive industry developing rapidly to comply with the demands of consumer. In this paper, the motor development of high voltage electric compressor for hybrid car is presented. In the first place, optimal design of the motor has been conducted. In order to find optimal solution, Taguchi method was used and Output power, Torque-Ripple, Cogging-Torque were considered in optimization process. Also, stress simulation was conducted to prevent the problems in mass production. The weight balance was designed and applied to the motor since the high voltage electric compressor has unbalance. Finally, through the comparison between simulation results and experimental ones, the validity of design process is verified.
하이브리드 자동차의 고전압 전동압축기용 IPMSM의 최적화 설계 및 평가
조성국(Seongkook Cho),정경훈(Kyunghun Jung),조경석(Kyungseok Cho),박창호(Changho Park) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.10
Automobile industry is a technology-intensive industry which has to develop new product rapidly to comply with the demands of consumers. Recently the importance of motor driven electrical compressor is increased dramatically as hybrid car became more popular for the fuel economy. In this paper, high efficiency IPM type BLDC motor development of the high voltage electric compressor for hybrid car is presented. Firstly optimal design of the motor has been conducted. Taguchi method was used to find optimal solution for motor efficiency and cogging torque. Output power, torque-ripple, cogging-torque were considered in optimization process. Secondly, Response surface method(RSM) was used to find optimal level of design factor among motor efficiency, speed range and cogging torque. Finally designed motor has been made and the validity of design process is verified through the comparison between simulation results and experimental ones.
조성국(Seongkook Cho),신현재(Hyeonjae Shin),정경훈(Kyunghun Jung),왕윤호(Yunho Wang) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
In this paper, a study was conducted on the motor shape design in consideration of efficiency, which is the main design requirement of BLDC motor for engine cooling fan, and cogging torque, which is the main noise source of the motor. A comparative analysis was conducted using the electromagnetic field finite element method for the effects of various design factors constituting each motor shape on the efficiency and cogging torque. Since the influence of motor design factors on efficiency and cogging torque has an alternating effect, an optimization model was derived using Taguchi’s optimization method and RSM (response surface method) to consider them at the same time. The final model designed through this study was analyzed for performance characteristics through the finite element method (FEM), which is a numerical method of electromagnetic field analysis, and the validity of the design and analysis was verified through experiment after making prototype motors.
회복탄력성을 고려한 기상 시나리오별 가뭄 용수 공급방안: 나주호를 중심으로
박진현 ( Park Jinhyun ),고재한 ( Go Jeahan ),조영준 ( Jo Youngjun ),정경훈 ( Jung Kyunghun ),성무홍 ( Sung Muhong ),정형모 ( Jung Hyoungmo ),박현규 ( Park Hyunkyu ),유승환 ( Yoo Seunghwan ),윤광식 ( Yoon Kwangsik ) 한국농공학회 2018 한국농공학회논문집 Vol.60 No.5
Resilience has been widely used in various fields including design and operation of infrastructures. The resilient infrastructures not only reduce the damage scale of various disasters but also reduce the time and cost required for restoration. However, resilience rarely applied to promote efficient management of agricultural infrastructures. Recently, drought is an aggravating disaster by climate change and need countermeasures. Therefore, we tried to demonstrate evaluating measures in case of drought under consideration of resilience. This study applied the robustness-cost index (RCI) to evaluate alternative solution of the supply problem of a large agricultural reservoir under drought conditions. Four structural alternatives were selected to estimate the robustness index (RI) and the cost index (CI) to obtain the RCI values. Structural alternatives are classified into temporary measures and permanent measures. Temporary measures include the development of a tube wells and the installation of the portable pump, while the permanent measures include the installation of a pumping stations and the pumping water to the reservoir (Yeongsan River-Naju reservoir). RCI values were higher in permanent measures than those of temporary measures. Initial storage of the reservoir also affected RCI values of the drought measures. Permanent measures installation and management of early stage of the reservoir storage shortage was identified as the most resilient system.