【作者】 李宁；

【导师】 康龙云；

【作者基本信息】 华南理工大学 ， 车辆工程， 2010， 硕士

【摘要】 电机驱动技术是新能源汽车,特别是纯电动汽车的关键技术,是当今电动汽车工业研究的两个主要方向之一。本文是关于电动汽车电机驱动技术的应用研究,研究中使用的电机为四相8/6极开关磁阻电机。针对此电机,设计了一套新型控制系统,使开关磁阻电机可以分时工作在发电和电动状态。首先,根据开关磁阻电机的结构特点和原理,建立数学模型,明确其在发电和电动状态的工作原理。在此基础上,提出一种可用于电动汽车的开关磁阻电机双向控制系统,确定控制策略,从而实现电动汽车正常行驶状态下的驱动要求以及制动、滑行状态下的能量回馈。其次,在确定控制策略和选择控制方法的基础上,设计实现此控制策略的总体方案,包括硬件的设计和软件的编写及调试。选用H桥式功率变换器主电路,采用电流斩波控制和电压斩波控制两种主要的控制方法,设计驱动电路、信号采集电路和外围保护电路。对应于发电/电动状态的不同能量流动过程,硬件部分采用同一套外围电路,而软件部分则采用不同的方式实现分时控制。最后,对电动汽车用开关磁阻电机控制系统的样机系统进行实验研究,通过对电动和发电状态下实验的结果分析,以验证所设计的驱动系统。分析结果显示系统运行稳定、性能良好,从理论和实践上为电动汽车制动能量的回收提供了实用性的探索。更多还原

【Abstract】 Motor drive is the key technology of new energy vehicles, especially electric vehicles, and in the current research field, it is one of two main directions of the EV industry. In this dissertation, the applied technology of motor drive technology is studied and the object is an 8/6 structure Switched Reluctance Motor (SRM). A new control system for this kind of motor is devised in order to make the motor work in time sharing mode as a generator and electric motor. The main contents of this thesis are summarized as follows:First, according to the structural characteristics and principles of SRM, the mathematical model of SRM is build and the work principle of SRM is classified as a generator and electric motor. On this basis, a bidirectional control system for SRM is presented used in EVs and then the control strategy is determined. Consequently, for EVs, both the states of normal driving requirements and the energy feedback of braking or sliding are achieved.Then, on the basis of the control strategy and the the control methods, the overall scheme of the control system for SRM is devised, including the design of hardware and the compiling and debugging of software . H-bridge converter for SRM is built,using chopped current control and voltage chopping control as the major control chip,and then the drive circuit,the signal acquisition circuit and the protection circuit are devised. Corresponding to the different energy flow processes under the state of generating and motor-operated, the same set of hardware peripherals circuits are used, but in software part different methods are chosen to realize the time sharing control.Finally, experiments have been done on this SRM bidirectional control prototype system, and based on the experiments under the state of generating and electric motor, in order to validate the drive system in this article. The result shows that the prototype system has stable operation and good properties, and the practical exploration is provided for braking energy recovery of electric vehicles both in theory and practice.更多还原