• Title, Summary, Keyword: Electric vehicle

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Modeling and Dynamic Analysis for Electric Vehicle Powertrain Systems (전기 자동차 파워트레인의 모델링 및 동특성 분석)

  • Park, Gwang-Min;Lee, Seong-Hun;Jin, Sung-Ho;Kwak, Sang-Shin
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.48 no.6
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    • pp.71-81
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    • 2011
  • Unlike a typical internal combustion engine vehicle, the powertrain system of the pure electric vehicle, consisting of battery, inverter and motor, has direct effects on the vehicle performance and dynamics. Then, the specific modeling of such complex electro-mechanical components enables the insight into the longitudinal dynamic outputs of the vehicle and analysis of entire powertrain systems. This paper presents the dynamic model of electric vehicle powertrain systems based on theoretical approaches to predict and analyze the final output performance of electric vehicles. Additionally, the correlations between electric input signals and the final output of the mechanical system are mathematically derived. The proposed model for powertrain dynamics of electric vehicle systems are validated with a reference electric vehicle model using generic simulation platform based on Matlab/Simulink software. Consequently, the dynamic analysis results are compared with electric vehicle simulation model in some parameters such as vehicle speed/acceleration, and propulsion forces.

The Test Study on Driving Efficiency Improvement of Two-wheeled Electric Vehicle according to Regenerative Braking (전기 동력 이륜차의 회생제동에 따른 구동효율 향상에 관한 평가 연구)

  • Cho, Suyeon;Seo, Donghyun;Park, Junsung;Shin, Waegyeong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.6
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    • pp.635-641
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    • 2016
  • Regenerative braking performance of an electrically powered vehicle is closely related to driving distance per battery charge. An electric vehicle uses appropriate amounts of mechanical braking force and electromagnetic regenerative braking force to recover energy and increase driving efficiency. In particular, when it drives on a downhill road, energy recovery rate is maximized through regenerative braking during coasting based on the mass inertia of the vehicle. Since an electric two-wheeled vehicle covered in this paper is lighter than an electric four-wheeled vehicle, the improvement of its driving distance per battery charge through regenerative braking is different from an electric four-wheeled vehicle. This study compared the driving characteristics of an electric two-wheeled vehicle based on regenerative braking. Two driving test modes were simulated with a chassis dynamometer system. By analyzing the measurement of a chassis dynamometer, the driving characteristics of a two-wheel electric vehicle, such as driving efficiency, were analyzed. In addition, test results were reviewed to draw the limitations of conventional test methods for regenerative braking performance of an electric two-wheel vehicle.

Communication Interoperability of Electric Uehicle Charging Infrastructure and Grid Network (전기차 충전 인프라와 전력망 간의 통신 상호운용성 연구)

  • Ju, Seunghwan;Lee, Ilho;Song, Sanghoon
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.14 no.1
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    • pp.15-25
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    • 2018
  • ISO/IEC 15118 is a standard for communications and services for electric vehicle charging infrastructure. Although this standard deals only with data communication between an electric vehicle and a charge station, communication with the outside is essential for establishing an authentication system for vehicle certification and V2G service for electric power transmission. In this study, it was designed to verify the information of electric car charging infrastructure in electric power system through communication link between ISO/IEC 15118 electric vehicle model and IEC 61850 standard MMS protocol. This is demonstrated in the field so that the electric vehicle communication data is linked with the micro grid management system. This could be used as an element technology in other distributed power sources as well as electric cars in the future.

Development of an Intelligent Autonomous Control Algorithm and Test Vehicle Performance Verification (지능형 자율주행 제어 알고리즘 개발 및 시험차량 성능평가)

  • Kim, Won-Gun;Yi, Kyong-Su
    • Proceedings of the KSME Conference
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    • pp.861-866
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    • 2007
  • This paper presents development of a vehicle lateral and longitudinal control for autonomous driving control and test results obtained using an electric vehicle. Sliding control theory has been used to develop a vehicle speed and distance control algorithm. The longitudinal control algorithm that maintains safety and comfort of the vehicle consists of a cruise and STOP&GO control depending on traffic conditions. Desired steering angle is determined through the lateral position error and the yaw angle error based on preview optimal control. Motor control inputs have been directly derived from the sliding control law. The performance of the autonomous driving control which is integrated with a lateral and longitudinal control is investigated by computer simulations and driving test using an electric vehicle. Electric vehicle system consists of DC driving motor, an electric power steering system, main controller (Autobox)

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Reverse Logistics Process for Electric Vehicle Batteries (전기자동차 배터리 역물류 프로세스 연구)

  • Seo, Dong-Min;Kim, Yong-Soo;Kim, Hyun-Soo
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.34 no.3
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    • pp.57-70
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    • 2011
  • To address global climate change, various governments are investing in electric vehicle research and, especially in Korea, the application of electric vehicles to public transportation. The lithium batteries used in electric vehicles typically have an expected life cycle of 2-5 years. If electric vehicles become commonly used, they will generate many discarded batteries that could be harmful to the environment. Additionally, lithium batteries are potentially explosive and should be handled appropriately. Thus, reverse logistics issues are involved in handling expired batteries efficiently and safely. Reverse logistics includes the collection, recycling, remanufacturing, and discarding of waste. This study developed a reverse logistics process for electric vehicle batteries after analyzing the as-is process for lead and lithium batteries. It also developed possible disposal regulations for electric vehicle batteries based on current laws regarding conventional batteries.

Simulation for the Fuel Economy and the Emission of Diesel Hybrid Electric Vehicle (디젤 하이브리드 전기 자동차의 연료경제성 및 배출가스에 관한 시뮬레이션)

  • Han, Sung-Bin;Chang, Yong-Hoon;Suh, Buhm-Joo;Chung, Yon-Jong
    • Journal of Energy Engineering
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    • v.18 no.1
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    • pp.31-36
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    • 2009
  • There are several types of environment friendly vehicle being developed by auto manufactures. HEV (Hybrid Electric Vehicle) is most applicable one among them in actuality. HEV has two power sources, one is an internal combustion engine, the other one is an electric device. The HEV is developed for reducing fuel consumption and emissions. We selected the diesel engine as a main power source of HEV. The tests were carried out under different driving cycles which was CBDBUS (Central Business Driving Bus Schedule) and HWFET (Highway Fuel Economy Test). This research presents a simulation for the fuel economy and the emission of heavy diesel hybrid vehicle according to the SHEV (Serial Hybrid Electric Vehicle), PHEV (Parallel Hybrid Electric Vehicle), Plug-in SHEV and plug-in PHEV.

Range Extension of Light-Duty Electric Vehicle Improving Efficiency and Power Density of IPMSM Considering Driving Cycle (주행 사이클을 고려한 IPMSM의 효율 및 출력 밀도 개선으로 경량 전기 자동차의 주행거리 연장)

  • Kim, Dong-Min;Jung, Young-Hoon;Lim, Myung-Seop;Sim, Jae-Han;Hon, Jung-Pyo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.12
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    • pp.2197-2210
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    • 2016
  • Recently, the trend of zero emissions has increased in automotive engineering because of environmental problems and regulations. Therefore, the development of battery electric vehicles (EVs), hybrid/plug-in hybrid electric vehicles (HEVs/PHEVs), and fuel cell electric vehicles (FCEVs) has been mainstreamed. In particular, for light-duty electric vehicles, improvement in electric motor performance is directly linked to driving range and driving performance. In this paper, using an improved design for the interior permanent magnet synchronous motor (IPMSM), the EV driving range for the light-duty EV was extended. In the electromagnetic design process, a 2D finite element method (FEM) was used. Furthermore, to consider mechanical stress, ANSYS Workbench was adopted. To conduct a vehicle simulation, the vehicle was modeled to include an electric motor model, energy storage model, and regenerative braking. From these results, using the advanced vehicle simulator (ADVISOR) based on MATLAB Simulink, a vehicle simulation was performed, and the effects of the improved design were described.

Proposal and Simulation of Optimal Electric Vehicle Routing Algorithm (최적의 전기자동차 라우팅 알고리즘 제안 및 시뮬레이션)

  • Choi, Moonsuk;Choi, Inji;Jang, Minhae;Yoo, Haneul
    • KEPCO Journal on Electric Power and Energy
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    • v.6 no.1
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    • pp.59-64
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    • 2020
  • Scheduling of electric vehicles and optimizing for charging waiting time have been critical. Meanwhile, it is challengeable to exploit the fluctuating data from electric vehicles in real-time. We introduce an optimal routing algorithm and a simulator with electric vehicles obeying the Poisson distribution of the observed information about time, space and energy-demand. Electric vehicle routing is updated in every cycle even it is already set. Also, we suggest an electric vehicle routing algorithm for minimizing total trip time, considering a threshold of the waiting time. Total trip time and charging waiting time are decreased 34.3% and 86.4% respectively, compared to the previous algorithm. It can be applied to the information service of charging stations and utilized as a reservation service.

Improvement of the Yaw Motion for Electric Vehicle Using Independent Front Wheel Steering and Four Wheel Driving (독립 전륜 조향 및 4륜 구동을 이용한 전기 차량의 선회 운동 향상)

  • Jang, Jae-Ho;Kim, Chang-Jun;Kim, Sang-Ho;Kang, Min-Sung;Back, Sung-Hoon;Kim, Young-Soo;Han, Chang-Soo
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.1
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    • pp.45-55
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    • 2013
  • With the recent advancement of control method and battery technology, the electric vehicle have been researched to replace the conventional vehicle with electric vehicle with the view point of the environmental concerns and energy conservation. An electric vehicle which is equipped with the independent front steering system and in-wheel motors has advantage in terms of control. For example, the different torque which generated by left and right wheels directly can make yaw moment and the independent steering using outer wheel control is able to reduce the sideslip angle. Using of independent steering and driving system, the 4 wheel electric vehicle can improve a performance better than conventional vehicle. In this paper, we consider the method for improving the cornering performance of independent front steering system and in-wheel motor used electric vehicle with the compensated outer wheel angle and direct yaw moment control. Simulation results show that the method can improve the cornering performance of 4 wheel electric vehicle. We also apply the steering motor failure to steer the vehicle turned by the torque difference without steering. This paper describes an independent front steering and driving, consist of three parts; Vehicle Model, Control Algorithm for independent steering and driving and simulation. First, vehicle model is application of TruckSim software for independent front steering and 4 wheel driving. Second, control algorithm describes the reduced sideslip and direct yaw moment method in view of cornering performance. Last is simulation and verification.

Heat transfer analysis in the battery tray for electirc vehicle (전기자동차 배터리 트레이 내에서의 열전달 해석)

  • Lim Jongsoo;shin Dongshin
    • Proceedings of the KSME Conference
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    • pp.651-654
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    • 2002
  • Study of electric vehicle is popular with automobile company. However, battery cooling problem has delayed development of electric vehicle. Lifetime of electric vehicle's battery depends on the cooling effect for the battery tray. One model was simulated by 3-D, steady state, incompressible, k-e turbulent model simulation. It is found that flow inlet, outlet and inlet position are very important design parameters.

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