摘  要：通过对电动汽车起步加速过程中的受力模型和无刷直流电机(BLDCM)数学模型的分析,提出了电动汽车电机动态模型、输出转矩与车速的交互关系,建立了起步加速过程电动汽车的动态数学模型。根据加速性能要求和驾驶特性成功地将车速、电流双闭环调速控制系统应用于电动汽车的驱动。利用Matlab70/Simulink仿真软件,对BLDCM及其双闭环调速控制系统的阶跃响应进行了仿真研究，并给出了电动汽车起步加速过程的仿真结果，结果表明该调速系统完全满足设计样车的起步加速控制。
关键词：起步加速；无刷直流电机；双闭环调速控制系统；仿真 

Abstract:In this thesis, the interactive relationship among the three factors that dynamic model of brushless DC motor (BLDCM), output torque and vehicle speed was presented and the dynamic mathematic model of starting-acceleration processes was established by analyzing the force model of starting-acceleration processes and the mathematic model of BLDCM. According to the demand of acceleration performance and the steering characteristics, vehicle speed and current double closed-loop speed regulating system was applied to EV driving successfully. By using Matlab7.0/ Simulink, the response wave of step input signal of BLDCM and its double closed-loop speed regulating system was simulated. The result shows that this speed control system can satisfy the demands of starting-acceleration process for driving system.
Key words:  starting-acceleration; brushless DC motor; double closed-loop speed regulation system; simulation