【作者】 范金鑫；

【导师】 王继先；

【作者基本信息】 安徽农业大学 ， 农业机械化工程， 2004， 硕士

【摘要】 随着我国汽车保有量急剧增加，能源和环境问题将更加突出。人们迫切需要寻求一种低排放和节约能源的交通工具。电动汽车(EV)以其在节能和环保方面的巨大优势，已成为世界各国竞相研究的重要热点，必将成为21世纪重要的交通工具之一。 电机驱动系统是电动汽车最关键的部分之一，它将决定整车的性能。20世纪90年代以后，国外电动汽车开始使用的交流驱动系统来取代直流驱动系统，已成为驱动系统的主流。目前，我国交流异步电机驱动系统的研究在满足电动汽车特殊要求方面还处于研究阶段。 本论文根据异步电机的多变量数学模型，运用电机统一理论、机电能量转换以及在坐标变换理论基础上发展起来的矢量控制理论，深入地研究电动汽车交流异步电机驱动系统控制的技术与方法。 研究过程中主要采用转子磁场定向的矢量控制方法，通过矢量运算，做到分别控制dqO旋转坐标中的磁场电流分量i_m与转矩电流分量i_T，对交流异步电机实现类似直流电动机的转速控制与调节，以获得快速响应和精确控制的目标。 为实现电动汽车驱动系统控制要求快速敏捷、实时性高等特点，研究中选用了TI公司的电机控制专用DSP芯片TMS320LF2407作为系统的核心控制芯片、高性能的智能功率模块(IPM)逆变功率器件，设计了控制系统的主回路、控制电路。在设计过程当中考虑了电磁干扰和电磁兼容问题。为验证设计系统的可行性，运用MATLAB6.0中的动态仿真工具SIMULINK对系统的动静态性能进行了仿真研究，仿真结果表明该系统具有良好的速度响应和位置控制能力。 研究中设计开发的以高性能的DSP芯片TMS320LF2407为核心、基于矢量控制原理的电动汽车异步电机驱动系统，提出用一种新型的PWM调制方法—电压空间矢量法(SVPWM)实现对异步电机的高性能可靠控制。更多还原

【Abstract】 With the vehicle retention increasing dramatically in our country, energy and environment problem is becoming more and more serious. Transportation tools with low exhaust and high energy efficency are urgently needed. The electric vehicle, which is generically economic and environmental friendly, has become the most important hotspot?in transportation vehicle research worldwide. EV will become one of most important transportation tools in 21st centuries.Motor drive system is one of the key parts of vehicle and determines the performance of the whole vehicle. Since 1990’s, AC motor drive system has become the mainstream drive system of EV abroad, replacing the DC drive system. At present, AC motor drive system meeting the special propulsion demands of the EV (Electrical Vehicle) is still in the stage of trial.According to multi-variable mathematical model of AC motor, this paper thoroughly studied the control technique and method of AC motor drive system of EV, using motor unification principle, energy conversion and vector control theory which is based on coordinate transformation.To achieve quick response and precision control, we adopted rotor flux field-oriented control to control the rotate speed of asynchronous motor in a similar as that of a DC motor, by the way of controlling magnetic current im and torque iT of dqO revolving coordinate respectively via vector calculation.In order to realize fleetness and high real-time performance required by the drive system of EV, we selected as core control of system the digital signal processor (DSP), TMS320LF2407 of TI company, which is specific for motor control; intelligent power module (IPM) of converter power apparatus of high performance. We also designed the main circuit and control circuit of the system, taking into consideration the electromagnetism interference (EMI) and electromagnetism compatibility (EMC) are. The dynamic and static characteristics are simulated using SIMULINK of MATLAB 6.0, which showed that the system had both good speed response and position control capacity. In this EV motor control system study we developed the hardware control system based on high-performance TMS320LF2407 DSP, and proposed a novel PWM method-Space Vector Pulse Width Modulation (SVPWM) to realize the reliable high performance control of asynchronized motor. The algorithm described in this paper can achieve favorable result.更多还原