• Title/Summary/Keyword: Fuel cell hybrid electric vehicles

Search Result 47, Processing Time 0.03 seconds

Survey on Energy Management Strategy for Fuel Cell Hybrid Electric Vehicles (연료전지 하이브리드 자동차의 에너지 운용전략에 관한 기술조사)

  • Lee, Nam-Su;Jeong, Gu-Min;Ahn, Hyun-Sik;Kim, Do-Hyun
    • Proceedings of the KIEE Conference
    • /
    • 2005.10b
    • /
    • pp.511-513
    • /
    • 2005
  • The fuel cell system has inherent limitation such as slow response time and low fuel economy especially at the low power region, and thus, the battery system has come to be used to compensate for the fuel cell system. This type of hybrid configuration has many advantages, however, the energy management strategy is essentially required. The work in this paper presents survey on recent power management strategies for fuel cell hybrid electric vehicles. For three power management strategies: basic control method. object function-based control method, and fuzzy logic-based control method. each strategy is reviewed and discussed with other strategy.

  • PDF

FUEL ECONOMY IMPROVEMENT FOR FUEL CELL HYBRID ELECTRIC VEHICLES USING FUZZY LOGIC-BASED POWER DISTRIBUTION CONTROL

  • Ahn, H.S.;Lee, N.S.;Moon, C.W.;Jeong, G.M.
    • International Journal of Automotive Technology
    • /
    • v.8 no.5
    • /
    • pp.651-658
    • /
    • 2007
  • This paper presents a new type of fuzzy logic-based power control strategy for fuel cell hybrid electric vehicles designed to improve their fuel economy while maintaining the battery's state of charge. Since fuel cell systems have inherent limitations, such as a slow response time and low fuel efficiency, especially in the low power region, a battery system is typically used to assist them. To maximize the advantages of this hybrid type of configuration, a power distribution control strategy is required for the two power sources: the fuel cell system and the battery system. The required fuel cell power is procured using fuzzy rules based on the vehicle driving status and the battery status. In order to show the validity and effectiveness of the proposed power control strategy, simulations are performed using a mid-size vehicle for three types of standard drive cycle. First, the fuzzy logic-based power control strategy is shown to improves the fuel economy compared with the static power control strategy. Second, the robustness of the proposed power control strategy is verified against several variations in system parameters.

Comparative Study on Power Control Strategies for Fuel Cell Hybrid Electric Vehicles (연료전지 하이브리드 자동차에 대한 에너지 운용전략의 비교 연구)

  • Ki, Young-Hun;Jeong, Gu-Min;Ahn, Hyun-Sik;Kim, Do-Hyun
    • Proceedings of the KIEE Conference
    • /
    • 2006.04a
    • /
    • pp.198-200
    • /
    • 2006
  • In this paper, three types of power control strategies for controlling a Fuel Cell Hybrid Electric Vehicle(FCHEV) are studied in view of fuel economy. The FCHEV has become one of alternatives for future vehicles since it does emit water only without any exhaust gas while it has a high well-to-wheel efficiency together with an energy saving due to regenerative braking. However, it has also several disadvantages such as the complexity of vehicle system, the increased weight and the extra battery cost. Among various power control strategies, a static power control strategy, a power assist control strategy and a fuzzy logic-based power control strategy are simulated and compared to show the effectiveness of each method.

  • PDF

Design and Control Strategy of Fuel Cell Hybrid Power System for Light Electric Railway Vehicles (경전철용 연료전지 하이브리드 동력시스템 설계 및 제어)

  • Kim, Young-Ryul;Park, Young-Won
    • Journal of the Korean Society for Railway
    • /
    • v.12 no.5
    • /
    • pp.772-777
    • /
    • 2009
  • The development of fuel cell hybrid power system, as a next generation power system to promote clean energy which will mitigate the continued global warming, has demonstratd a significant progress in passenger vehicle applications. Also, in case of railway vehicles in non-electrified railway lines, the adoption of fuel cell hybrid power system is being studied among well-known manufacturers. This paper introduces both the configuration and the control strategy of fuel cell hybrid power system to apply to a light electronic railway vehicle having a repeated driving pattern of acceleration, coasting and deceleration. The simulation results demonstrate the viability of the proposed power system design and its control strategy.

Transient Performance of a Hybrid Electric Vehicle with Multiple Input DC-DC Converter

  • Nashed, Maged N.F.
    • Journal of Power Electronics
    • /
    • v.3 no.4
    • /
    • pp.230-238
    • /
    • 2003
  • Electric vehicles (EV) demands for greater acceleration, performance and vehicle range in pure electric vehicles plus mandated requirements to further reduce emissions in hybrid electric vehicles (HEV) increase the appeal for combined on-board energy storage systems and generators. And the power electronics plays an important role in providing an interface between fuel cells (FC) and loads. This paper deals with a multiple input DC-DC power converter devoted to combine the power flowing of multi-source on energy systems. The multi-source is composed of (i) FC system as a prime power demands, (ii) super capacitor banks as energy storage devices for high and intense power demands, (iii) superconducting magnetic energy storage system (SMES), (iv) multiple input DC-DC power converter and (v) a three phase inverter-fed permanent magnet synchronous motor as a drive. In this system, It is used super capacitor banks and superconducting magnetic energy replaces from the battery system. The modeling and transient performance simulation is effective for reducing transient influence caused by sudden charge of effective load. The main purpose of power electronic converters is to convert the DC power output from the fuel cell and other to a suitable AC voltage, which can be connected to electric loads directly (PMSM). The fuel cell and other output is connected to the DC-DC converter, which regulates the DC link voltage.

Z-Source Inverter with SiC Power Semiconductor Devices for Fuel Cell Vehicle Applications

  • Aghdam, M. Ghasem Hosseini
    • Journal of Power Electronics
    • /
    • v.11 no.4
    • /
    • pp.606-611
    • /
    • 2011
  • Power electronics is a key technology for electric, hybrid, plug-in hybrid, and fuel cell vehicles. Typical power electronics converters used in electric drive vehicles include dc/dc converters, inverters, and battery chargers. New semiconductor materials such as silicon carbide (SiC) and novel topologies such as the Z-source inverter (ZSI) have a great deal of potential to improve the overall performance of these vehicles. In this paper, a Z-source inverter for fuel cell vehicle application is examined under three different scenarios. 1. a ZSI with Si IGBT modules, 2. a ZSI with hybrid modules, Si IGBTs/SiC Schottky diodes, and 3. a ZSI with SiC MOSFETs/SiC Schottky diodes. Then, a comparison of the three scenarios is conducted. Conduction loss, switching loss, reverse recovery loss, and efficiency are considered for comparison. A conclusion is drawn that the SiC devices can improve the inverter and inverter-motor efficiency, and reduce the system size and cost due to the low loss properties of SiC devices. A comparison between a ZSI and traditional PWM inverters with SiC devices is also presented in this paper. Based on this comparison, the Z-source inverter produces the highest efficiency.

Fuzzy Logic-Based Energy Management Strategy for FCHEVs (연료전지 하이브리드 자동차에 대한 퍼지논리 기반 에너지 운용전략)

  • Ahn Hyun-Sik;Lee Nam-Su
    • The Transactions of the Korean Institute of Electrical Engineers D
    • /
    • v.54 no.12
    • /
    • pp.713-715
    • /
    • 2005
  • The work in this paper presents development of fuzzy logic-based energy management strategy for a fuel cell hybrid electric vehicle. In order for the fuel cell system to overcome the inherent limitation such as slow response time and low fuel economy especially at the low power region, the battery system has come to compensate for the fuel cell system. This type of hybrid configuration has many advantages, however, the energy management strategy between power sources is essentially required. For the optimal power distribution between the fuel cell system and the battery system, a fuzzy logic-based energy management strategy is proposed. In order to show the validity and the robustness of suggested strategy, some simulations are performed for the standard drive cycles.

Green pathway to hydrogen fuel cell vehicle (수소 연료전지차로의 전환을 위한 녹색 전략)

  • Lee, Munsu;Lee, Minjin;Lee, Younghee
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 2011.11a
    • /
    • pp.152.1-152.1
    • /
    • 2011
  • This study analyzes transitions to a green path in transportation system in South Korea. We develop transportation system model with four new technology options, green cars; Hybrid electric vehicle, plug-in hybrid vehicle, electric vehicle and fuel cell vehicle. Among those technologies fuel cell vehicle is the best option assuming no GHG emissions when driving. We use MESSAGE model to get an optimal solution of pathway for high deployment of fuel cell vehicles under the Korea BAU transportation model. Among hydrogen production sources, off gas hydrogen is most economic since it is hardly used to other chemical sources or emits in South Korea. According to off gas hydrogen projection it can run 1.8 million fuel cell vehicles in 2040 which corresponds to 10% of all passenger cars expected in Korea in 2040. However, there are concerns associated with technology maturity, cost uncertainty which has contradictions. But clean pathway with off gas and renewable sources may provide a strong driving force for energy transition in transportation in South Korea.

  • PDF

Numerical Analysis of Electromagnetic Characteristic of High Voltage/Current Cable for Fuel Cell Electric Vehicle (FCEV) (수소 연료전지 차량용 고전압 케이블의 전자파 특성 수치해석에 관한 연구)

  • Lee, Soon-Yong;Choi, Jae-Hoon
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.21 no.3
    • /
    • pp.149-157
    • /
    • 2010
  • The electromagnetic characteristics of FCEVs (fuel cell electric vehicles) are much different from the existing combustion engine cars as well as hybrid, plug-in-hybrid, and pure electric vehicles due to the high voltage/current generated by a fuel cell stack which uses a compressed hydrogen gas reacted with oxygen. To operate fuel cell stack efficiently, BOP (Balance of Plant) is essential. BOP systems are used many not only for motors in water pump, air blower, and hydrogen recycling pump but also inverters for these motors. Since these systems or components are connected by high voltage cables, EMC (Electromagnetic compatibility) analysis for high voltage/current cable is the most important element to prevent the possible electric functional safety errors. In this paper, electromagnetic fields of high current/voltage cable for FCEVs is studied. From numerical analysis results, time harmonic magnetic field strength of high current/voltage cable have difference of 20~28 dB according to phase. EMI result considered ground effect of FECV at 10 m shows difference of 14.5 dB at 30 MHz and 2.8 dB at 230 MHz compared with general cable.

Design and Performance Evaluation for a Fuel Cell/Battery Hybrid Mini-Bus Based on a Simulation (시뮬레이션 기반 연료전지/2차전지 하이브리드 미니버스의 설계 및 성능 평가)

  • Kim, Min-Jin;Kong, Nak-Won;Lee, Won-Yong;Kim, Chang-Soo
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.18 no.1
    • /
    • pp.60-66
    • /
    • 2007
  • In terms of the vehicle efficiency, a fuel cell hybrid system has advantages compared to a conventional internal combustion engine and a fuel cell alone-powered system. The efficiency of the fuel cell hybrid vehicle mainly depends on the maximum power of the fuel cell and therefore it is important to decide the design value of the fuel cell maximum power. In this paper, to estimate the performance of the fuel cell hybrid mini-bus in the design phase the simulator based on the models for the fuel cell stack, the electric battery, the fuel cell balance of plant, the controller, and the vehicle itself is proposed. Additionally, the hybrid mini-bus efficiencies with several different fuel cell powers are simulated for a city driving schedule and are compared on another. Consequently, the proposed simulation scheme is useful to determine the best design value of the fuel cell hybrid vehicles.