• 제목/요약/키워드: charger

검색결과 622건 처리시간 0.034초

전기자동차용 통합충전기의 모델링 및 전류제어기 설계 (Modeling and Current Controller Design of Integrated Charger)

  • 허건;박용순
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2018년도 추계학술대회
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    • pp.42-44
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    • 2018
  • An integrated charger is used for bi-directional power conversion between an electric vehicle and a power grid. The proposed integrated charger works in a way that motor windings are utilized as filter inductances for charging/discharging of batteries in addition to the original purpose of motor drives. After a mathematical model of the integrated charger based on an dual winding induction machine (DWIM) is discussed, a current control method is designed for grid connection. The effectiveness of the proposed method is examined with simulation results.

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전기자동차 충전행태분석 (Charging Behavior Analysis of Electric Vehicle)

  • 박규호;전현명;정갑채;손봉수
    • 대한교통학회지
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    • 제35권3호
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    • pp.210-219
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    • 2017
  • 친환경 교통수단으로 주목받고 있는 전기자동차는 우리나라에서도 2011년부터 지속적으로 보급대수가 증가하고 있다. 전기자동차 보급에 따라 충전 인프라 확대를 위하여 본 논문에서는 전기자동차 보급률이 높고 충전인프라가 비교적 잘 구축되어 있는 제주도 사례를 바탕으로 충전소 이용행태를 분석하여 기존 충전소의 효율적 운영방안과 추가적인 충전시설 설치 시 고려할 요소에 대하여 분석하고자 하였다. 전기자동차 충전소가 있는 읍면동별 급속충전기와 완속충전기 이용특성과 시설의 유형에 따라 시간대별 이용특성을 분석하였다. 제주도에 설치된 충전기의 이용 빈도를 분석한 결과, 급속충전기와 완속충전기 이용 빈도 모두 특정지역에 편중된 이용률이 나타났다. 유형별 충전소 이용은 급속충전기와 완속충전기 모두 업무시설과 공영주차장에 설치된 충전기 이용률이 높았으나, 시간대별 이용률을 보면 급속충전기는 오후시간 전반에 걸쳐 이용률이 높은 반면, 완속충전기 이용은 오전시간에 집중되어 있었다. 이러한 이용특성을 반영하여 이용자들이 전기자동차 충전소를 효율적으로 이용할 수 있도록 이용률이 낮은 충전소를 안내하는 홍보방안과 충전기를 이용할 때에 주의사항 및 충전완료 알림서비스 등을 제공하는 것이 필요할 것이다. 또한, 아직 충전기가 설치되지 않은 지역을 충전기 설치대상지역으로 고려하고, 이에 더불어 충전기 이용률이 높은 지역과 시설에 추가 설치가 이루어져야 한다. 실제 전기자동차 충전행태 분석 결과를 활용하여 실질적인 서비스 향상이 가능할 것으로 기대된다.

Design and Control of the Phase Shift Full Bridge Converter for the On-board Battery Charger of Electric Forklifts

  • Kim, Tae-Hoon;Lee, Seung-Jun;Choi, Woo-Jin
    • Journal of Power Electronics
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    • 제12권1호
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    • pp.113-119
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    • 2012
  • This paper describes the design and control of a phase shift full bridge converter with a current doubler, which can be used for the on-board charger for the lead-acid battery of electric forklifts. Unlike the common resistance load, the battery has a large capacitance element and it absorbs the entire converter output ripple current, thereby shortening the battery life and degrading the system efficiency. In this paper a phase shift full bridge converter with a current doubler has been adopted to decrease the output ripple current and the transformer rating of the charger. The charge controller is designed by using the small signal model of the converter, taking into consideration the internal impedance of the battery. The stability and performance of the battery charger is then verified by constant current (CC) and constant voltage (CV) charge experiments using a lead-acid battery bank for an electric forklift.

자기적으로 결합된 PCB권선을 이용한 무접점 배터리 충전기 (A New Contactless Battery Charger Using Coupled Printed Circuit Board Windings)

  • 노재현;차헌녕;최병조;안태영
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제51권1호
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    • pp.16-22
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    • 2002
  • The Proposed contactless charger employs a Pair of neighboring Printed circuit board (PCB) windings as a contactless energy transfer device, thereby making it amenable to low-Profile designs and suitable for applications to the portable telecommunication/computing electroncis in which stringent requirements for height, space, and reliability have to be met. The performance of the proposed charger is confirmed with experiments on a prototype charger developed for cellular phones

영전압 방전이 가능한 새로운 방식의 2차전지 충방전기 (New Secondary Battery Charger/Discharger Available for Zero Voltage Discharge)

  • 정대택;채수용;홍순찬
    • 조명전기설비학회논문지
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    • 제26권11호
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    • pp.62-74
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    • 2012
  • This paper proposes a new secondary battery charger/discharger available for zero voltage discharge which is used for test equipments and formation process. The proposed system is a switching type converter, and thus the system is high efficiency and more compact as compared with linear type charger/discharger. Conventional switching type charger/discharger can not discharge secondary batteries to zero voltage because of voltage drops in the switching elements and long distributing line(typically 10m). However, the proposed system is able to discharge the battery to zero voltage in constant current mode regardless of the voltage drops. In this paper, we analyze the proposed charger/discharger and the validity of the system is verified by simulation and experiment.

ZVS 방식을 이용한 셀 충전기의 연구 (The study of the cell charger using ZVS method)

  • 이종규;류희삼
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2002년도 학술대회논문집
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    • pp.277-279
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    • 2002
  • This paper is an experimental research of the design of a cell battery charger using switching methods. The developed charger in this paper can do both the equalizing current charge and floating charge. Also, it is easily transferable. Power MOS FET was used for the full bridge converter of the charger, and ZVS was applied for the switching method of the converter. Also, Customized IC was used for the control circuit in order to simplify ZVS mode. The setting current and floating current used for the charger were designed by using OP AMP. Based on the process provided by the current research, a sample converter with the power rating of 5KVA was developed and is field-testing to improve its validity and stability.

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유동해석을 통한 터보차저 형상 연구 (A Study on the Configuration of Turbo Charger through Flow Analysis)

  • 한문식;조재웅
    • 한국기계가공학회지
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    • 제17권3호
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    • pp.34-38
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    • 2018
  • Recently, the turbo charger has become an important part because it yields little displacement and high power while downsizing the engine's fuel ratio for environmental purposes. In this study, flow analysis was conducted to form the basis of data regarding the best efficiency. The axial displacement was changed from none to 25 mm by controlling the configuration of the turbo charger and the flow analyses were compared with each other. The maximum rate of the outlet of model 1 was 46.36 m/s and the maximum pressure of model 4 was 0.761946 Pa. The maximum flow rate of model 4 was 0.000187650 kg/s. This study's result should aid in the effective design of a turbo charger with high performance.

온라인 임피던스 분광법을 이용한 배터리 진단 기능을 가진 3kW 충전기 (A 3kW Battery Charger with Battery Diagnosis Function Using Online Impedance Spectroscopy)

  • 도안반투안;최우진
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2014년도 추계학술대회 논문집
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    • pp.68-69
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    • 2014
  • In the battery based applications such as electric vehicle and energy storage system, the performance of the system highly depends on the reliability of the battery. However, it is difficult to obtain the accurate information about the state-of-health (SOH) of battery during its operation. In this paper a 3kw battery charger with battery diagnosis function which can estimate the SOH of the battery by using online impedance spectroscopy technique is introduced. For the charger phase shift full bridge converter with synchronous rectification has been adopted to implement the charge and diagnosis functions. The impedance spectroscopy is performed after the charge to obtain the information about the internal impedance of the battery module, hence the SOH can be estimated online by observing the impedance variation of the battery over time. All the design procedure of the proposed charger is detailed and the feasibility of the system is verified by the experimental results.

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A Low Cost Maximum Power Point Tracking Technique for the Solar Charger

  • Nguyen, Thanh Tuan;Choi, Woojin
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2012년도 추계학술대회 논문집
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    • pp.5-6
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    • 2012
  • In this paper, a simplified maximum power point tracking technique for the solar charger is presented. Main advantages of the proposed charger include low cost and optimized charge time. The maximum power point tracking method is used to deliver the maximum power from PV array to the battery thereby reducing the charge time. Moreover, the proposed technique which tracks the maximum power point by adjusting output current helps reduce the quantity of required number of sensors for the charger. The experimental protype was implemented by using an 80W PV array, a buck converter and a digital signal processor to verify the feasibility of the proposed method.

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Ni-Cd전지용 충전 알고리즘을 이용한 고속전철용 ZVZCS형 충전장치개발 (The Development of ZVZCS type Battery Charger for High Speed Trail Car with Ni-Cd Battery Charging Algorithm)

  • 최욱돈;이종필;이재문;김연준
    • 전력전자학회논문지
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    • 제5권5호
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    • pp.493-500
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    • 2000
  • 고속전철용 충전기는 VVVF, CVCF, DC/DC 컨버터에 전원을 공급하고 안정성과 시스템의 신뢰성을 목적으로 하는 중요한 에너지원이다. 본 논문에서는 밧데리 충전 알고리즘과 고속전철용 ZVZCS형 밧데리 충전기의 전력회로를 포함한다. 또한 고속전철용 50kW 충전기의 최적 병렬운전과 Ni-Cd 밧데리의 충전 방법을 설명하고 실험을 통해 타당성을 입증한다.

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