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电动汽车电机驱动控制策略学案.doc

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本科毕业设计(论文) GRADUATION DESIGN(THESIS) 论文题目:电动汽车电机驱动控制策略研究 本科生姓名:关海波 学号:201211318 指导教师姓名:赵峰 职称: 申请学位类别: 工学学士 专业:电力工程与管理 设计(论文)提交日期:(小四号楷体加黑)答辩日期:(小四号楷体加黑) 本科毕业设计(论文) 电动汽车电机驱动控制策略研究 Investigation on control strategy of motor drive for electric vehicle 姓 名: 关海波 学 号: 201211318 学 院: 新能源与动力工程学院 专 业 班 级: 电力工程与管理1201班 指 导 教 师: 赵峰 完 成 日 期: 兰 州 交 通 大 学 Lanzhou Jiaotong University 摘 要 本论文首先介绍了异步电动机的数学模型,通过坐标变换,得到了异步电动机的空间矢量等效电路。并由理想逆变器的8种开关状态入手,得到了理想逆变器的数学模型,建立了空间电压矢量的定义。并在此基础上对定子磁链和电磁转矩与空间电压矢量之间的关系进行了分析,阐述了六边形磁链轨迹和近似圆形磁链轨迹异步电动机直接转矩控制系统的结构和工作原理。 根据异步电动机直接转矩控制的工作原理,本论文在MATLAB/Simulink的平台下,分别搭建了六边形磁链轨迹和圆形磁链轨迹直接转矩控制系统模型。并对仿真结果进行了相应的分析,验证了异步电动机直接转矩控制策略的可行性。而且,对两种磁链轨迹直接转矩控制系统的优缺点及应用范围进行了比较。关键词:电动汽车电机驱动直接转矩控制 Abstract This thesis starts with the mathematic model of the induction motor, and gets the space vector equivalent circuit by coordinate transform. The mathematic model of the inverter and the concept of the voltage space vector are gotten from the eight switched states of the inverter. Then, this thesis describes the structure and the principle of the DTC system both in hexagon flux track and in round flux track for induction motor based on the analysis of the relations between stator flux and electrical torque with voltage space vector. The DTC system models in hexagon flux track and in round flux track are built on the platform of MTATLAB/Simulink separated upon the principle of DTC. The feasibility of the strategy of the DTC for induction motor is testified by the simulation, and the performances of the two kinds of DTC system are compared also. This thesis makes a further theory research, and makes a software and hardware design on DTC system for induction motor, which takes the motor drive of electric vehicle as the researchi
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