【作者】 刘洋；

【导师】 周凯；

【作者基本信息】 哈尔滨理工大学 ， 电力电子与电力传动， 2022， 硕士

【摘要】 纯电动汽车具有两大核心技术问题,即电机及其控制器技术和电池及其充电技术,它们对电动汽车的性能和续航里程具有深层影响。本文基于传统电动汽车电机控制器拓扑结构,采取分时复用IGBT功率模块的形式,扩展电机控制器的自身功能,使控制器同时实现电机驱动和车载动力电池充电两大模块的功能。提出驱动-充电一体化控制器结构并阐述其工作原理。在拓扑层面进行解耦分析,分别建立集成拓扑中两种双向变换器的数学模型,为控制策略的选择和设计提供理论基础,基于小信号干扰建立双向DC/DC变换器的数学模型并绘制等效电路;同样将三相静止坐标系下建立的双向交直流变换器数学模型逐步推导至dq坐标系下,两种双向变换器在不同状态下的等效数学模型的相似程度也说明了集成拓扑的可行性。为方便控制系统的设计,兼顾两种模式,对拓扑中复用的中间储能元件的参数进行计算。在控制层面进行解耦分析,分别确定两种模式下的控制策略,在已建立的数学模型的基础上,设计双闭环控制系统;根据确定的中间储能元件参数,计算PI调节参数并运用MATLAB绘制补偿后的系统开环幅频特性曲线。两种模式对采样信号的处理方式及电流内环设计的相似程度都进一步证明了集成控制器的可行性。在Simulink中搭建了仿真系统,仿真结果验证了该集成控制器的可行性和有效性。设计集成控制器的硬件电路和软件程序,并搭建基于TMS320F28335的集成控制器实验平台,以阻性负载模拟动力电池,进行充电模式的验证,并分析交流侧电压电流输入、母线电压及电池充电电压等波形;以5k W永磁同步电机为负载进行驱动模式验证,实验结果表明,两种模式在额定工况下均能够正常运行。本文通过一系列的计算、设计、仿真和实验验证了电动汽车驱动-充电一体化控制器的可行性,并为其推广提供了技术基础。更多还原

【Abstract】 Pure electric vehicle has two core technical problems,namely motor and its controller technology and battery and its charging technology,which have a deep impact on the performance and mileage of electric vehicle.Based on the topology of traditional electric vehicle motor controller,this thesis adopts the form of time-sharing multiplexing IGBT power module to expand the functions of the motor controller,so that the controller can realize the functions of motor drive and vehicle power battery charging at the same time.The structure of driving charging integrated controller is proposed and its working principle is described.The decoupling analysis is carried out at the topology level,and the mathematical models of two bidirectional converters in the integrated topology are established respectively,which provides a theoretical basis for the selection and design of control strategy.The mathematical model of bidirectional DC/DC converter is established based on small signal interference,and the equivalent circuit is drawn;Similarly,the mathematical model of bidirectional AC/DC converter established in three-phase static coordinate system is gradually deduced to dq coordinate system.The similarity of the equivalent mathematical models of the two bidirectional converters in different states also shows the feasibility of the integrated topology.In order to facilitate the design of the control system,taking into account the two modes,the parameters of the multiplexed intermediate energy storage elements in the topology are calculated.The decoupling analysis is carried out at the control level,and the control strategies under the two modes are determined respectively.Based on the established mathematical model,the double closed-loop control system is designed;According to the determined parameters of the intermediate energy storage element,the PI adjustment parameters are calculated,and the compensated open-loop amplitude frequency characteristic curve of the system is drawn by MATLAB.The processing methods of sampling signals and the similarity of current inner loop design between the two modes further prove the feasibility of the integrated controller.The simulation system is built in Simulink,and the simulation results verify the feasibility and effectiveness of the integrated controller.The hardware circuit and software program of the integrated controller are designed,and the integrated controller experimental platform based on TMS320F28335 is built.The resistive load is used to simulate the power battery,verify the charging mode,and analyze the waveforms of AC side voltage and current input,bus voltage and battery charging voltage;The driving mode is verified with5 k W permanent magnet synchronous motor as the load.The experimental results show that both modes can operate normally under rated working conditions.Through a series of calculation,design,simulation and experiments,this thesis verifies the feasibility of electric vehicle drive charging integrated controller,and provides a technical basis for its popularization.更多还原