Journal of Asian Electric Vehicles
Online ISSN : 1883-6038
Print ISSN : 1348-3927
ISSN-L : 1348-3927
8 巻 , 2 号
選択された号の論文の8件中1~8を表示しています
Special Issue of EV Asia, 2010 in Seoul
Paper
  • Guoliang Wu, Rengui Lu, Chunbo Zhu, C. C. Chan
    2010 年 8 巻 2 号 p. 1419-1423
    発行日: 2010年
    公開日: 2011/01/31
    ジャーナル フリー
    Battery state of charge is related with available capacity. Battery available capacity varies with temperature and discharge current. A good way to forecast available capacity is Peukert's equation. In order to verify the practicability of Peukert's equation at room temperature and low temperature, 1/3C, 1C, 2C, 3C rate discharge experiments were undertaken. The result indicates Peukert's equation is suitable for estimating available battery of NiMH battery in 25 C. The result also indicates, at low temperatures, Peukert's equation is practical for NiMH battery at low current and unpractical in high current. Based on the result, a piece-wise Peukert's equation with Temperature Correction Factor to NiMH Battery State of Charge (SOC) estimation has been proposed. The proposed method improves the precision of SOC estimantion.
  • Zheng Chen, Xi Zhang, Chris Chunting Mi
    2010 年 8 巻 2 号 p. 1425-1432
    発行日: 2010年
    公開日: 2011/01/31
    ジャーナル フリー
    A control strategy was developed to improve fuel economy, enhance engine efficiency as well as extend battery cycle life in the series hybrid electric vehicle (SHEV) powertrain. The controller was based on fuzzy logic, fixed-boundary-layer sliding mode controllers (FBLSMCs) and an optimized battery charge scenario. The fuzzy logic based energy management controller is developed to determine the engine power based on two inputs, battery state-of-charge (SOC) and vehicle power demand. The goal of the fuzzy logic based controller is to enhance the engine and battery operation efficiency and at the mean time, extend battery life. An appropriate battery charge scenario is designed to remove surge charge current, and avoid persistently-high charge power, which are positive factors to the battery lifetime extension. Besides, two robust FBLSMCs against uncertain disturbances are configured in the powertrain control system, responsible for engine speed control and engine torque control, respectively. Simulation results are obtained for comparison between the proposed and conventional powertrain control schemes. Through these simulations, the effectiveness and superiority of the proposed powertrain control strategy are validated.
  • Moez Ayadi, Hana Kebaili, Mohamed Amine Fakhfakh, Rafik Neji
    2010 年 8 巻 2 号 p. 1433-1439
    発行日: 2010年
    公開日: 2011/01/31
    ジャーナル フリー
    Heat transfer is the science that seeks to predict the energy transfer that takes place between material bodies as a result of a temperature difference. When designing an electric motor, the study of heat transfer is as important as electromagnetic and mechanical design. However, due to its three dimensional nature, it is generally considered to be more difficult than the prediction of the electromagnetic behaviour. For this reason, and the fact that the majority of designers have an electrical rather than mechanical background, thermal analysis is usually not given as much emphasis as the electromagnetic design. This paper presents the thermal model simplified of Permanent Magnet Synchronous Motor (PMSM) with radial flux for electric vehicle (EV) application. The thermal design technique used is the analytical lumped circuit. The equivalent circuit of the motor is implemented and simulated with MATLAB simulator. Simulations by Motor-CAD software were made in order to shows the accuracy of the proposed thermal model.
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