电动汽车永磁同步电动机弱磁调速研究

电动汽车永磁同步电动机弱磁调速研究

摘要本文围绕电动汽车用永磁同步电动机PMSM调速系统展开工作，主要从控制角度研究扩展PMSM 的调速范围。

永磁同步电动机具有体积小、效率高以及功率密度大等优点，特别是内置式PMSM 具有较宽的弱磁调速能力。

上个世纪80 年代以来，随着稀土永磁材料性价比的不断提高，以及电力电子器件的快速发展，永磁同步电动机的研究也进入了一个新的阶段。

矢量控制理论是交流调速领域的一个重大突破。

本论文详细讨论了永磁同步电动机的矢量控制，在推导其精确数学模型的基础上，分析了永磁同步电动机的几种矢量控制策略，包括了id0 控制、cosφ1 控制以及最大转矩/电流控制方式。

弱磁控制是永磁同步电动机矢量控制的前沿课题。

论文分析了永磁同步电动机弱磁调速原理，提出了三种特殊转子结构的新弱磁方案。

本文还围绕电动汽车用永磁同步电动机调速系统的硬件开发展开工作。

以TI 公司专用于电机控制的TMS320LF2407A型数字信号处理器DSP作为核心，开发了全数字化的PMSM 矢量控制调速系统，并完成相应的系统硬件设计。

最后对所设计的电动汽车用永磁同步电动机驱动系统进行了初步的实验验证，表明采用本文所提出的全速范围弱磁控制算法具有较

快的动态响应速度，可以满足调速系统弱磁性能要求。

关键词永磁同步电动机；矢量控制；弱磁控制；控制器AbstractThis dissertation is devoted to the study on Permanent magnet synchronous motor PMSM drive system for electric vehicle EV application. It is mainly to improve the control of motors, then expand the scope of the motor speed. PMSM has the advantage of small volume, high efficiency and power density, especially inner permanent magnet synchronous motor have the ability of wide field-weakened operation. Therefore there search on PMSM has entered a new stage since the 1980’s with the improvement of ratio between the performance and the price of the rare earths PM material and the development of the power electronics devices. Vector control VC theory is a great breakthrough in the AC speed control field. Also details of the VC of PMSM is presented in the paper，and the analysis of several circuit control strategies of VC theory applied to the PMSM control，which include the id0 control，cosφ 1 control and the max torque/current control. The paper discusses the theory of weaking flux speed control of PMSM which is a new development direction. Then it brings out three new weaking flux plans，which have special rotor structures. This dissertation is devoted to the study of hardware on PMSM drive system for EV application. Based on TI company DSP special-designed for motor control on TMS320LF2407A designs and develops a full-digital PMSM vector control system, and

hardware of the system is accomplished. Finally, the experiment has been done for the drive which design in the paper. Result of the experiment indicate validity of the field-weakening method which introduced in the paper.Key word PMSM Vector control field-weakened operation controller目录 1 绪论∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙31.1 课题背景及意义∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙31.2 电动汽车的发展现状及趋势∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙51.2.1 国内外主要国家电动汽车发展情况∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙51.2.2 电动汽车的发展趋势∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙71.3 永磁同步电动机弱磁控制研究现状∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙81.3.1 从改进控制方法角度提高永磁同步电动机的弱磁能力∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙81.3.2 从电机结构设计提高永磁同步电动机的弱磁能力∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙91.4 课题主要工作∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙