小功率电动汽车用异步电机控制策略研究

发布时间：2018-01-19 21:19

本文关键词： 电动汽车 eCAN通讯最大加速度参数辨识单电阻采样　出处：《浙江大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着一次能源短缺问题日趋严重,雾霾天气频频出现,具有低噪声,少污染,高效节能特点的电动汽车已成为汽车行业的热门发展方向。驱动系统是电动汽车的心脏,驱动器控制算法的优良决定了电机的运行性能。汽车在运行过程中,起停较为频繁,尤其是在大城市市区内。因此在百公里速度内,汽车加速时间是汽车系统较为重要的考虑因素。本文设计了基于TMS320F28069芯片的异步电机控制系统,并提出了“最大加速度／转矩电流”的控制算法。本文首先介绍了异步电机在不同坐标系下的数学模型以及异步电机矢量控制方式,并详细介绍了SVPWM的调制原理,通过仿真说明了SVPWM调制下电机线、相电压的变化。其次,搭建了基于TMS320F28069控制器的异步电机硬件平台,设计了相应的软件程序；此外,结合TMS320F2812开发板,设计了通过eCAN通讯实现数据传输的测试小工具。在主控制器TMS320F28069控制电机运行的过程中,能够不断将检测到的变量数据或不便检测的中间变量数据传输到副控制器TMS320F2812中存储,并在开发软件CCS3.3中显示。该方法能够一次性观察较多变量且不占用主控制器存储单元,对主控制器的控制性能没有影响。另外,通过两个电机控制系统,比较了霍尔电流传感器和单电阻电流采样法这两种用于检测大电流的方法的优缺点,提出了各自的适用场合。最后,分析了异步电机参数对电机电磁转矩的影响,提出了一种“最大加速时间／转矩电流”的控制算法。在此基础上设计了对异步电机定子参数进行辨识的程序,并将其作为整定控制算法中最佳转子时间常数的初值。在搭建的异步电机硬件平台上进行了异步电机参数辨识以及最大加速时间／转矩电流的控制实验,验证了该算法的有效性。
[Abstract]:With the problem of primary energy shortage becoming more and more serious, haze weather appears frequently, with low noise and less pollution. The electric vehicle with high efficiency and energy saving characteristics has become the hot developing direction of the automobile industry. The drive system is the heart of the electric vehicle, and the excellent driver control algorithm determines the performance of the motor. Stops are more frequent, especially in large urban areas. Therefore, they are within 100 kilometers of speed. Automobile acceleration time is an important factor in automobile system. In this paper, an asynchronous motor control system based on TMS320F28069 chip is designed. The control algorithm of "maximum acceleration / torque current" is proposed. Firstly, the mathematical model of asynchronous motor in different coordinate systems and the vector control mode of asynchronous motor are introduced. The modulation principle of SVPWM is introduced in detail, and the change of motor line and phase voltage under SVPWM modulation is explained by simulation. Secondly. The hardware platform of asynchronous motor based on TMS320F28069 controller is built and the corresponding software program is designed. In addition, combine the TMS320F2812 development board. A testing tool for data transmission through eCAN communication is designed. The main controller TMS320F28069 is used to control the motor operation. The detected variable data or the inconvenient intermediate variable data can be continuously transmitted to the secondary controller TMS320F2812 for storage. It is shown in the development software CCS3.3 that the method can observe more variables at one time and does not occupy the memory unit of the main controller, and has no effect on the control performance of the main controller. By means of two motor control systems, the advantages and disadvantages of Hall current sensor and single resistance current sampling method are compared, and their respective applications are proposed. In this paper, the influence of induction motor parameters on the electromagnetic torque of induction motor is analyzed, and a control algorithm of "maximum acceleration time / torque current" is proposed. Based on this, a program is designed to identify the stator parameters of asynchronous motor. As the initial value of the optimal rotor time constant in the tuning control algorithm, the parameters identification of the asynchronous motor and the control experiment of the maximum acceleration time / torque current are carried out on the hardware platform of the asynchronous motor. The validity of the algorithm is verified.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.72

【相似文献】