电动汽车增程器用永磁与电磁混合励磁起动发电系统及控制技术研究-车辆工程专业论文.docxVIP

山东理 山东理工大学硕士学位论文 摘 要 万方数据 万方数据 摘 要 永磁与电磁混合励磁起动发电机集发电机、起动机两者的优点于一体，既具有混合 励磁发电机耦合磁场良好的调节特性、又具有起动/发电一机多用、结构紧凑的特点，非 常适用于电动汽车增程器用起动发电系统。 通过分析混合励磁磁势之间相互关系，采用径向永磁与凸极电磁串联磁场的混合励 磁转子，对混合励磁起动发电机磁路进行设计计算，得到永磁磁路、电励磁磁路及混 合励磁磁路的等效磁路图，推导出磁导、漏磁导及漏磁系数的计算方法，为优化起动 发电机参数提供理论依据。 以永磁磁场为主、电励磁磁场为辅，电励磁磁场能够调节永磁磁场的原则，对永磁 转子部分和电励磁转子部分以及电枢绕组主要参数进行了计算，使起动发电机各参数符 合设计要求。 建立混合励磁起动发电机磁场分析数学模型，利用 ANSOFT 软件对起动发电机永 磁磁场、电励磁磁场以及合成磁场进行仿真，得到起动发电机在不同的励磁源作用下磁 力线分布图，磁矢位图，磁通密度模值图，通过改变定子结构参数优化磁场分布，提高 输出效率。 设计出由起动控制电路、稳压控制电路、起动发电转换电路集成的控制系统， 既能使起动发电机在宽转速、宽负载范围内运行时稳定输出电压，又能保证起动 发电机能够平稳起动增程器发动机工作。 关键词：电动汽车增程器 混合励磁起动发电机 磁路分析 起动控制 I 山东理 山东理工大学硕士学位论文 ABSTRACT ABSTRACT Permanent magnet and electromagnetism mixed excitation starter-generator that integrates hybrid excitation generator and starter. It has the advantages of good adjusting performance and high power density of coupling magnetic field in hybrid excitation motor, and the features of multi-use and compact structure of starter-generator, which is very fit for extender starter-generator system. The structure of radial permanent magnet and salient pole electromagnetic is adopted on the mixed excitation rotor by the comparation the relationship between the mixed magnetomotive. The diagram of equivalent magnetic circuit of the permanent magnet, electro-magnetic and mixed excitation, permeance, leakage permeance and leakage coefficient are obtained by design and calculation of the mixed excitation starter-generator magnetic circuit, which provides theoretical basis for optimization of the parameters. The permanent magnet and electrical excitation rotor parts are designed by using the principle that permanent magnet magnetic field is priority; electric excitation magnetic field is complementary and electric field magnetic field can adjust the permanent magnet magnetic field. The other structures such as stator; armature winding are designed, which is fit for the requirement of design. The mathematical model of hybrid excitation starter-generator is established, th