• Title, Summary, Keyword: Electric vehicle

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A Study for DC 1500V Railroad System Modeling Using EMTDC

  • Lee, Han-Sang;Lee, Chang-Mu;Lee, Han-Min;Jang, Gil-Soo
    • Proceedings of the KIEE Conference
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    • pp.218-219
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    • 2006
  • This paper is about modeling on 1500V DC electric railroad system. Electric railroad systems have peculiar characteristics against other electric system. The characteristics arc that the railroad systems have electric vehicle loads which are power-varying and location-varying with time. Because of this load characteristic, the electric railroad system modeling which reflects its own characteristics on EMTDC simulation could not be achieved. However, to reflect load characteristic on EMTDC, this paper suggests electric railroad system modeling by using TPS (Train Performance Simulator) that was developed in Korea Railroad Research Institute. A TPS program has various kinds of input data, such as operation condition, vehicle condition, and power system condition. By these data, TPS calculates mechanical power consumption and location, especially it decide electric power consumption on the basis of the fact that consumed electric and mechanical power are equal. Moreover, on this paper, movement of vehicle is reflected on EMTDC simulation as variation of feeder impedance. Also, an electric vehicle load is modeled as time-varying constant power load model.

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Evaluation of Fuel Economy for a Parallel Hybrid Electric Vehicle

  • Park, Dookhwan;Kim, Hyunsoo
    • Journal of Mechanical Science and Technology
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    • v.16 no.10
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    • pp.1287-1295
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    • 2002
  • In this work, the fuel economy of a parallel hybrid electric vehicle is investigated. A vehicle control algorithm which yields operating points where operational cost of HEV is minimal is suggested. The operational cost of HEV is decided considering both the cost of fossil fuel consumed by an engine and the cost of electricity consumed by an electric motor. A procedure for obtaining the operating points of minimal fuel consumption is introduced. Simulations are carried out for 3 variations of HEV and the results are compared to the fuel economy of a conventional vehicle in order to investigate the effect of hybridization. Simulation results show that HEV with the vehicle control algorithm suggested in this work has a fuel economy 45% better than the conventional vehicle if braking energy is recuperated fully by regeneration and idling of the engine is eliminated. The vehicle modification is also investigated to obtain the target fuel economy set in PNGV program.

Development of the Power Conversion Controller for Electric Vehicle (전기자동차용 전력변환 제어기 개발)

  • Oh, Yong-Seung;Kim, Hee-Jun;Lee, Sang-Taek
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.26 no.9
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    • pp.18-25
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    • 2012
  • Recently, the depletion of fossil fuel carbon dioxide emissions due to limitations in the internal combustion engine vehicles is rising concern about electric vehicle. Neighborhood Electric Vehicle(NEV) is maximum speed 60km/h and one day driving distances less than 80km. In this paper, Power Conversion Controller is proposed for Neighborhood Electric Vehicle. To verify the developed Power conversion Controller, Test performed integration test, max load, power density, efficiency. Confirmed that the vehicle can be applied.

A Study on Integrated Air-conditioning System for Electric Vehicle Based 1-ton Class Commercial Vehicle (전기차 기반의 1톤급 상용차용 통합공조 시스템에 관한 연구)

  • Baek, Soo-Whang;Kim, Chul-Soo
    • The Journal of the Korea institute of electronic communication sciences
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    • v.14 no.2
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    • pp.361-368
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    • 2019
  • This paper is a study on integrated air-conditioning system for 1-ton class commercial vehicle based on electric vehicle. In the case of an electric commercial vehicle, since the opening and closing of the door is frequently performed in order to get in and out of the cargo, the heat loss largely occurs. Therefore, the heating and cooling load is required to be larger than the electric vehicle. As a result, the energy consumed by the heating and cooling system is larger than the passenger electric car in order to satisfy the heat comfort required by passengers. In order to overcome these disadvantages, we performed research using an efficient integrated air conditioning system. Finally, the design and analysis of a heat pump system for heating and a electrical compressor for cooling need to be proceed to develop a high-efficiency air conditioning system for improving the commerciality of 1 ton-class electric trucks and expanding the industrial ecosystem in the electric truck sector.

Development of Regeneration Inverter using 3-Level Inverter (3레벨 인버터를 이용한 직류전력 회생인버터 개발)

  • 김상균;박채운;최종묵
    • Proceedings of the KSR Conference
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    • pp.1007-1012
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    • 2002
  • In this paper, a regeneration inverter is proposed using 3-level inverter. Electric regeneration means regeneration brake in electric railway vehicles. Induction motors, generally used with railway vehicles, convert the electric energy to the movement energy when vehicle is running. When the vehicle stop, the induction motor convert the movement energy to the electric energy. Usually, this energy is used with another running vehicle in the same section. If there is no vehicle around when the regeneration is occurred, regeneration energy is consumed by heat energy with resistors. The proposed inverter is capable of reuse this regeneration energy in another place.

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Development of an Electric Vehicle Simulation Program (전기자동차의 주행성능 프로그램 개발)

  • Gwon, O-Geon;Gu, Jeong-Seo;Choe, Jin-Min
    • 연구논문집
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    • pp.55-64
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    • 1992
  • A simulation program is developed to analyse the driving performance of an electric vehicle. It is composed of the structured modules modelled after the functional components of the electric vehicle. This program can be used conveniently in the conceptual design stage of a new electric vehicle. The comparision of the test data of ETX-1 developed by Ford with the calculated results shows reasonable agreement within 15% error.

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Energy Management Strategy of Hybrid Electric Vehicle Using Battery State of Charge Trajectory Information

  • Lee, Heeyun;Jeong, Jongryeol;Park, Yeong-il;Cha, Suk Won
    • International Journal of Precision Engineering and Manufacturing-Green Technology
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    • v.4 no.1
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    • pp.79-86
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    • 2017
  • This paper presents a new energy management control strategy of a hybrid electric vehicle, using dynamic programming with preview driving cycle information. Dynamic programming is a promising solution for energy management problem of the hybrid electric vehicle, yet global optimality can only be achieved with preview driving cycle information due to its non-causal property. As recent driving cycle prediction algorithms facilitate the use of preview driving cycle information, rule-based energy management strategy of the hybrid electric vehicle using dynamic programming optimization is presented in this study, under the assumption that the preview driving cycle information is already given. The strategy is composed of dynamic programming calculation and the rule-based control strategy using that calculation. Dynamic programming analyzes optimal control and battery state of charge trajectory in accordance with the vehicle travel distance, with given predicted driving cycle information. The proposed rule-based strategy distributes vehicle's demand power into the engine and the electric motor, to follow target battery state of charge trajectory acquired from dynamic programming. To validate the control strategy, simulation is conducted on various standard driving cycles. The energy management strategy shows improved fuel economy performance for diverse driving cycles.

A Study on Communication Controller of Electric Vehicle Supply Equipment for Information Exchange between Electric Vehicle and Power Grid (전기차와 전력계통의 정보교환을 위한 전기차 충전장치의 통신 제어기에 대한 연구)

  • Han, Ah;Shin, Minho;Kim, Intaek;Jang, Hyuk-Soo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.11
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    • pp.1564-1570
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    • 2014
  • An electric vehicle (EV) not only receives electric power from the electric vehicle supply equipment (EVSE), but it also exchanges the information regarding charging process with the power gird through the EVSE. However, the EV and EVSE communicate using the ISO/IEC 15118 standard while the EVSE and power grid communicate using the IEC 61850 standard. Therefore, the EVSE should support both the ISO/IEC 15118 and IEC 61850 standards, and provide a data mapping function between the two communication protocols so that the EV and power grid, which support different protocols, can communicate with each other throughout the charging process. In this paper, we propose a mapping method of the EVSE, which converts the ISO/IEC 15118 data to IEC 61850 and vice versa, based on the XML schema of each protocol. The proposed method converts the data using the XSL (eXtensible Stylesheet Language) method, which defines the data mapping between two XML schemas. Our approach is more flexible and easier to maintain against changes in charging scenarios and the standards than other existing approaches such as one-to-one data mapping methods.

Secured Authentication Scheme and Charging & Discharging System Operation for Electric Vehicles (정보보호를 고려한 전기자동차 충방전 시스템의 인증과 운영에 관한 연구)

  • Lee, Sunguk
    • The Journal of the Convergence on Culture Technology
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    • v.7 no.1
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    • pp.551-557
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    • 2021
  • With increase of electric vehicle in the road, the number of charging/discharging infrastructure for electric vehicle in public space is also increased rapidly. To charge or discharge the electric vehicle the user of electric vehicle and service provider should verify the each other's identity to minimize security vulnerability. This paper proposes mutual authentication scheme between electric vehicle and charging/discharging service provider with help of hash function and Message Authentication Code(MAC). Also efficient operating scheme for charging/discharging service system is proposed. The analysis shows that the system has robustness against security vulnerability. Also this system can keep the sensitive personal information of service user safely.

Smart Card and Dynamic ID Based Electric Vehicle User Authentication Scheme (스마트카드 및 동적 ID 기반 전기 자동차 사용자 인증 스킴)

  • Jung, Su-Young;Kwak, Jin
    • Journal of Digital Convergence
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    • v.11 no.7
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    • pp.141-148
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    • 2013
  • Smart grid can two-way communication using ICT(Information & Communication Technology). Also, smart grid can supply to dynamic power that grafted to electric vehicle can activate to electric vehicle charging infrastructure and used to storage battery of home. Storage battery of home can resale to power provider. These electric vehicle charging infrastructure locate fixed on home, apartment, building, etc charging infrastructure that used fluid on user. If don't authentication for user of fluid user use to charging infrastructure, electric charging service can occurred to illegal use, electric charges and leakgage of electric information. In this paper, we propose smartcard and dynamic ID based user authentication scheme for used secure to electric vehicle service in smart grid environment.