【作者】 陈涛；

【导师】 向中凡；

【作者基本信息】 西华大学 ， 机械制造及其自动化， 2015， 硕士

【摘要】 轮毂电机电动汽车被认为是汽车产业未来发展的重要方向。轮毂电机把电机、减速器、制动装置以及轮毂等集成在一起,是纯电动汽车关键技术之一。开关磁阻电机具有起动转矩大、适合频繁起停、效率高、调速范围宽和发电反馈等特点,已成为轮毂电机研究热点。本文选择外转子开关磁电机作为轮毂电机动力驱动装置,深入研究了轮毂电机设计和仿真。首先,确定了外转子开关磁阻轮毂电机基本结构和电磁参数。通过分析轮毂电机驱动形式和性能特点,选择了驱动力矩更大、结构更紧凑的外转子式开关磁阻电机作为驱动电机。由于车轮轮内空间有限,本文选取行星减速机构作为驱动电机的减速增矩装置,根据电动汽车整车设计要求,提出了一种新型轮毂电机结构设计方案,并给出了分析和计算过程。其次,研究了在不同路况下轮毂电机受力振动模型,通过分析外转子开关磁阻电机运行原理和基本结构,研究了轮毂电机线性模型、准线性模型和非线性模型。由于轮毂电机采用集成化设计,造成车轮非簧载质量大幅增加、转矩脉动和振动噪声加大等问题,需要从结构设计和电磁优化两个方面解决轮毂电机存在的缺陷。因此,本文提出了轮内主动减振系统并对电机轴进行了有限元分析和优化,以便从结构设计上解决轮毂电机存在的问题。然后,使用Ansoft Maxwell 2D对轮毂电机进行电磁有限元分析。利用Maxwell 2D建立轮毂电机仿真模型,进行模型、材料、边界、激励源、铁芯损耗参数、仿真参数以及运动部分设置。根据仿真运算结果得到磁链-角度-电流和转矩-角度-电流等曲线,并开展有限元分析结果后处理研究。最后,利用Matlab/Simulink工具箱搭建轮毂电机电磁参数仿真平台。根据轮毂电机稳态磁场仿真数据,利用二维查表模块,采用三次多项式插值得到了磁链和转矩曲线,根据仿真结果进行分析,得到了轮毂电机电磁参数在不同电流、位置下的变化规律。通过理论分析、计算与仿真实验,验证了本文提出的外转子开关磁阻轮毂电机设计方案的可行性、有效性,为后续研究打下了理论与实践基础。更多还原

【Abstract】 Electric vehicle,which is driven by the in-wheel motor,is regarded as the important develop direction of auto industry.In-wheel motor integrated motor,brake equipment,decelerator and wheel hub,which is one of the key technologies of pure electric vehicle.Switched reluctance motor is the research hotspots of in-wheel motor,duing to hanving big starting torque,meeting starting and stopping frequently,having high efficiency,owning wide speed range and power feedback.In this paper,the exterior rotor switched reluctance motor is taken as the drive device,and the design and simulation of in-wheel motor is studied.Fristly,the basic structure and electromagnetic parameters of the exterior rotor switched reluctance motor are determined.The characteristics and drive form of the in-wheel motor is analyzed.The exterior rotor switched reluctance motor is selected as the drive motor for its bigger drive torque,more compact structure.In this paper,planetary decelerating mechanism is selected to be the decelerating and increasing torque unit,owing to the limited space in the wheel.A new in-wheel motor structure is proposed according to the requirements of the electric vehicle design.The analysis process and computing process is provided.Secondly,the force and vibration model of the in-wheel motor under different road conditions are studied.The liner model,quasi-linear model,non-linear model of the in-wheel motor are analyzed by analyse the working principle and basic structure of the exterior rotor switched reluctance motor.The in-wheel motor is designed using the integrated design,which increases the unsprung mass,the torque ripple,the vibration noise and so on.The defect of the in-wheel motor can be solved in two ways,one is through structure design,and the other one is electromagnetic optimization.The in-wheel active vibration system and the Finite Element Analysis of in-wheel motor shaft are studied to solving those problems from structure design of in-wheel motor.Then,the Electromagnetic Finite Element Analysis of in-wheel motor is studied based on Ansoft Maxwell 2D.The simulation model of the in-wheel motor is built by Maxwell 2D.The model,material,boundary,excitation source,core loss parameters,simulation parameters and motion part of in-wheel motor are set.According to the simulation result,flux linkage-angle-electric current and torque-angle-electric current curves are obtained.The post-processing researches of Finite Element Analysis result are carried out.Finally,the electromagnetic parameters simulation platform of the in-wheel motor is established by Matlab/Simulink.According to the simulation data of in-wheel motor on steady-state magnetic fieldand using the two-dimensional look-up table module,the flux linkage and torque curves are obtained by three order spline interpolation.Based on the analysis of simulation results,the electromagnetic parameters variation of in-wheel motor is obtained in different position and electric current.The design about feasibility and effectiveness of exterior rotor SRM in-wheel motor is verified,through theoretical analysis,calculation and simulation experiment,which forms firm foundation both of theory and practice for subsequent research.更多还原