电动汽车永磁同步电动机控制策略研究.pdf

湖北工业大学
硕士学位论文
电动汽车永磁同步电动机控制策略研究
姓名:邴黎明
申请学位级别:硕士
专业:电机与电器
指导教师:李新华
20090501
湖北エ业大学硕士学位论文
摘要
电动汽车作为人类解决能源和环境问题的汽车工业新技术,已成为国内外汽
车研发的热点。驱动电机是电动汽车中的主要部件,起着至关重要的作用。永磁
同步电动机具有高效、高功率密度以及良好的调速性能,成为电动汽车的首选驱
动电机。因此,研究永磁同步电动机计算机控制系统具有较高的理论和实际意义。
本课题以印度REVA公司电动汽车为背景,研究了电动汽车驱动用永磁同步
电动机矢量控制系统。本文首先分析了永磁同步电动机矢量控制的数学模型以及
坐标变换理论,并在此基础上构建了基于 MATLAB/ Simulink的仿真模型,对选用
的控制策略进行了仿真,并对仿真结果进行了分析;其次,比较深入地研究了永
磁同步电动机的矢量控制策略,包括a=0控制、最大转矩/电流比控制、恒磁链控
制、cosp=1控制、弱磁控制等,并确定电动汽车处于启动、加速、爬坡等工况下
时,采用ia=0控制,在高速路上或短时超车时,采用弱磁控制的策略;再次,对
永磁同步电动机起动方法、调节器设计、空间矢量脉宽调制技术( SVPWM)等做
了比较深入分析,在DSP开发环境CCS3.1下,采用以C语言和汇编语言混合编
程的方式编写了永磁同步电动机矢量控制算法程序,包括电机起动、 SVPWM的产
生、转速和位置计算、电流采样、PI调节器等系统程序;最后在软硬件设计的基
础上进行了驱动系统调试,取得了初步试验结果,为后续的研发工作莫定了良好
的基础。
关键词:电动汽车,永磁同步电动机,矢量控制,空间矢量脉宽调制,弱磁控制
湖北工业大学硕士学位论文
Abstract
The Electric Vehicle(EV), which is considered a new technology of automotive
industry to solve the problem of energy and environment, becomes international and
national focus. The drive motor being a main component of EV plays an important part
The Permanent Magnet Synchronous Motor (PMSM), which has high efficiency, high
power density and good timing performance, becomes the first choice for the EV drive
motor. So, the research on the computer control system of PMSM has a high theoretical
and practical significance
The background of this subject is the EV of REVA company in India. The vector
control system of PMSM used to drive EV is studied in the subject. Firstly, the
mathematical model of PMSM vector control and coordinate transformation is analyzed
in this paper. The simulation model based on MATLAB/Simulink is established, and the
control strategy selected is simulated, and the simulation results are analyzed. Secondly
the control strategies including ia=0 control, maximum torque/current ratio control
constant magnetic linkage control; cos =1 control and filed weakening control of
PMSM vector control are further studied. The strategy of id=0 control adopted when
starting, acceleration and climbing and filed weakening control adopted when on the
expressway and overtaking is determined. Thirdly, the starting methods, regulator
designing, Space Vector Pulse Width Modulation(SVPWM) technology and so on are
further analyzed. The control program including motor starting, SVPWM generation,
rotation and position calculation, current sampling, proportional integral regulator and
so on of PMSM are complied using the method of mixing C language and assembly
language under CC$3. 1. Lastly, the driving system is debugged based on software and
hardware designing. The preliminary experimental results are obtained, which lay a
good foundation for the subsequent research and development work
Keywords: Electric Vehicle, Permanent Magnet Synchronous Motor, Vector Control, Space Vector
Pulse Width Modulation, filed weakening control