• Title, Summary, Keyword: Charging Equipment

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A 20kHz Inverter for Inductive Charging System of Electric Vehicle (전기자동차 비접촉식 충전시스템을 위한 20kHz 인버터 설계)

  • Kim, Chul-Woo;Kim, Sang-Beom;Soh, Joon-Young;Lim, You-Seok
    • Proceedings of the KIEE Conference
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    • pp.1175-1176
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    • 2011
  • Electric Vehicle Supply Equipment(EVSE) is a system or an equipment to supply electric power for charging the traction batteries on the electric vehicle. EVSEs are classified with a conductive charging system and an inductive charging system by the power transfer method. Inductive charging systems are necessary to use high frequency converters to increase the output power and to reduce the size of the charging systems. In this paper, a 20kHz inverter for inductive charging system has been designed and PSCAD/EMTDC have been used to simulate the output characteristics of the 20kHz inverter.

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The smart EV charging system based on the big data analysis of the power consumption patterns

  • Kang, Hun-Cheol;Kang, Ki-Beom;Ahn, Hyun-kwon;Lee, Seong-Hyun;Ahn, Tae-Hyo;Jwa, Jeong-Woo
    • International Journal of Internet, Broadcasting and Communication
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    • v.9 no.2
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    • pp.1-10
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    • 2017
  • The high costs of electric vehicle supply equipment (EVSE) and installation are currently a stumbling block to the proliferation of electric vehicles (EVs). The cost-effective solutions are needed to support the expansion of charging infrastructure. In this paper, we develope EV charging system based on the big data analysis of the power consumption patterns. The developed EV charging system is consisted of the smart EV outlet, gateways, powergates, the big data management system, and mobile applications. The smart EV outlet is designed to low costs of equipment and installation by replacing the existing 220V outlet. We can connect the smart EV outlet to household appliances. Z-wave technology is used in the smart EV outlet to provide the EV power usage to users using Apps. The smart EV outlet provides 220V EV charging and therefore, we can restore vehicle driving range during overnight and work hours.

Charging-Discharging System with High Power Factor, High Efficiency (고역률, 고효율 충.방전기)

  • Kim, Eun-Soo;Joe, Kee-Yeon;Byun, Young-Bok;Koo, Heun-Hoi
    • Proceedings of the KIEE Conference
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    • pp.371-375
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    • 1995
  • This paper presents equipment for charging and discharging with high power factor and high efficiency. This equipment is consisted of $3{\phi}$ SPWM AC/DC converter for improving input current waveform and input power factor, and bidirectional DC/DC converter for electric isolation in the DC link Part. Therefore, Input power factor and the total efficiency in the proposed system can be increased more than in the conventional phase-controlled thyristor charging-discharging System.

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A Study on the Development of the Charging-Discharging System with High Power Factor and High Efficiency (고역율, 고효율 충.방전기 개발에 관한 연구)

  • Kim, Eun-Soo;Joe, Kee-Yeon;Byun, Young-Bok
    • Proceedings of the KIEE Conference
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    • pp.568-572
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    • 1994
  • This paper presents equipment for charging and discharging with high power factor aid high efficiency. This equipment is consisted of $3{\phi}$SPWM AC/DC converter for improving input current waveform and input power factor, and bidirectional DC/DC converter for electric isolation in the DC link Part. Therefore, Input power factor and the total efficiency in the proposed system can be increased more than in the conventional phase-controlled thyristor Charging - Discharging System.

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A Study on Characteristics of Charging and Discharging for Lead Storage Batteries in Series (직렬 연결된 납축전지의 충방전 전압 특성 연구)

  • Moon, Chae-Joo;Jin, Jong-Soo;Seo, Dong-Choon;Jung, Kwen-Sung;Kim, Tae-Gon;Kim, Young-Gu
    • 한국태양에너지학회:학술대회논문집
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    • pp.75-79
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    • 2008
  • To control the lead storage batteries it is necessary to consider the characteristics of each battery connected in series. In this study, the charging and discharging characteristics of sealed lead storage batteries 12V/1.2A was investigated one by one through experiments. The results of the experiment shows that one should consider the state of each battery to prevent overcharge or deep discharge. Also, we designed an equipment to measure battery voltages simultaneously using micro-controller. This equipment will be useful for monitoring batteries at PV generation system.

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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.

Development of the Switching Mode Conversion Type Pulse Charger for the Lead Battery of Solar Cell Generator Equipment by Fly-Back Converter Method (플라이백 컨버터방법에 의한 태양광발전설비의 납축전지 스위칭모드 전환형 펄스충전기 개발)

  • Shin, Choon-Shik;An, Young-Joo;Kim, Dong-Wan
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.1
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    • pp.20-26
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    • 2009
  • In this paper, the switching mode conversion type pulse charger by fly-back converter method for lead battery of the solar cell generator equipment is proposed. And we propose the control circuit and design method of insulated switching mode convert type pulse charger by fly-back convert method in the lead battery. The proposed system can minimize the current consumption by digital pulse. Also the proposed system can generate the constant 10[KHz] frequency, transmit the signal with main control system in the power control system. And it supervises the state of lead battery using one chip micro processor. The proposed the switching mode conversion type pulse charger by the fly-back converter method can charge fast and stabilize lead battery with nominal value 12[V], 20[AH]. Also we propose the design procedure of the power control circuit for turn ratio of fly-back inductor and determining method of values such as the charging current, bulk current, partial current, over current value and fixed charging voltage. The experiment results for the voltage and current wave for partial, bulk, over and fixed charging period show the good charging effect and performance. And the PCB and internal coupling diagram of the switching mode conversion type pulse charger by fly-back converter method is presented.

Electric Vehicle Charging Control System using a Smartphone Application Based on WiFi Communication (WiFi 기반 스마트폰 어플리케이션을 이용한 전기자동차 충전제어시스템)

  • Ro, Sunny;Lee, Kyung-Jung;Ki, Young-Hun;Ahn, Hyun-Sik
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.8
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    • pp.1138-1143
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    • 2013
  • In this paper, we propose a smartphone application based on a wireless fidelity(WiFi) in order to control the charging of electric vehicle(EV) and monitor the charging status together with the vehicle history information. The driver obtains much information on vehicle status through a smartphone application which communicates with the electric vehicle supply equipment(EVSE) management server while the EV also communicates with the EVSE for the authentification through controller area network(CAN). We also implement the simulator for the EV charging control system to verify the functions of the proposed application where the simulator consists of an EV model, an EVSE, and a smartphone. It is shown by the simulator that the proposed smartphone application allows the driver to control and to monitor the charging process of an EV conveniently and, moreover, it can provide the driver with vehicle information stored in the EVSE management server.

Mobile Edge Computing based Charging Infrastructure considering Electric Vehicle Charging Efficiency (전기자동차 충전 효율성을 고려한 모바일 에지 컴퓨팅 기반 충전 인프라 구조)

  • Lee, Juyong;Lee, Jihoon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.10
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    • pp.669-674
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    • 2017
  • Due to the depletion of fossil fuels and the increase in environmental pollution, electric vehicles are attracting attention as next-generation transportation and are becoming popular all over the world. As the interest in electric vehicles and the penetration rate increase, studies on the charging infrastructure with vehicle-to-grid (V2G) technology and information technology are actively under way. In particular, communication with the grid network is the most important factor for stable charging and load management of electric vehicles. However, with the existing centralized infrastructure, there are problems when control-message requests increase and the charging infrastructure cannot efficiently operate due to slow response speed. In this paper, we propose a new charging infrastructure using mobile edge computing (MEC) that mitigates congestion and provides low latency by applying distributed cloud computing technology to wireless base stations. Through a performance evaluation, we confirm that the proposed charging infrastructure (with low latency) can cope with peak conditions more efficiently than the existing charging infrastructure.

A Study on the Solar Cell Charging Equipment for Hybrid Vehicle (Hybrid 자동차용 Solar Cell 충전장치에 관한 연구)

  • Kim, G.S.;Park, S.C.
    • Journal of the Korean Society of Mechanical Technology
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    • v.13 no.4
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    • pp.157-164
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    • 2011
  • Hybrid car can improve fuel efficiency using a power of motor that is generated during constant-speed or deceleration driving. The motor is located between engine and transmission. But, when voltage of main battery is low, fuel efficiency is low because the voltage can't run the motor. In this situation, this study observed fuel efficiency when using solar cell for assistance power. In order to verify a fuel consumption of hybrid car equipped solar cell for assistance power, the car was tested downtown driving. As hybrid car was equipped solar cell for assistance, fuel consumption was reduced 8.35 % at running air conditioner. And, at air conditioner doesn't work, fuel consumption was reduced 6.88 %. This point of view, CO2 is expected to reduce in similar proportion.