外转子永磁电机控制研究

发布时间：2018-08-01 12:58

【摘要】：中国系稀土大国,永磁电机具有得天独厚的优势。永磁电机性能优势显著,但传统电机控制系统,长期处于西方把控。因此,本文从外转子永磁电机入手,研究其集成控制系统,有助于中国成为制造强国的实现意义重大。本文以省攻关课题(2015031008-2)为基础,设计一种外转子永磁电机控制系统,并对外转子永磁电机电磁场分布分析,建立其模型,分析外转子永磁电机的瞬态和静态性能,使用MATLAB建立其直接转矩控制策略模型,采用一种模糊SVPWM-DTC控制策略同时进行了仿真验证;并制作外转子永磁电机驱动板,利用DSP浮点电机控制芯片TMS320F28335作为核心控制器完成了硬件平台的研制并根据硬件电路在CCS集成编译环境下编写相关控制软件。首先,构建外转子永磁电机的物理模型,采用Ansoft/RMxprt软件,对外转子永磁电机物理结构参数考证与性能分析。完成对外转子永磁电机的二维电磁场进行了仿真分析,分析结果表明性能合理。其次,为了构建外转子永磁电机的数学模型,综合对比常用三种坐标系,选取了dq轴系,并引入永磁同步电机直接转矩控制原理和系统构造以及几个重要构成部分。验证了数学模型的合理性,为控制策略提供理论支撑。再次,基于上述模型研究了一种基于转速模糊PID和SVPWM-DTC系统,建立模糊SVPWM-DTC系统模型与传统DTC系统模型,并且对仿真结果对照分析。仿真结果表明,模糊SVPWM-DTC外转子永磁电机系统控制算法抑制电磁转矩和定子磁链脉动效果良好,达到了期望效果。最后,研制以TMS320F28335为核心的外转子永磁电机控制系统,并且使用DSP28335内置模块,用IR2136功率驱动芯片设计了功率逆变模块并设计外围电路,制作PCB板,焊接完成功率逆变模块。并设置光耦隔离电路,提升抗干扰能力,结合硬件电路在CCS环境下编写控制系统软件程序,完成触发模块占空比设计。
[Abstract]:China is a rare earth country, permanent magnet motor has unique advantages. The permanent magnet motor has obvious performance advantage, but the traditional motor control system is in the western control for a long time. Therefore, it is of great significance to study the integrated control system of the external rotor permanent magnet motor, which is helpful for China to become a manufacturing power. Based on the provincial research project (2015031008-2), a control system of external rotor permanent magnet motor is designed in this paper. The electromagnetic field distribution of external rotor permanent magnet motor is analyzed and its model is established to analyze the transient and static performance of external rotor permanent magnet motor. The direct torque control strategy model based on MATLAB is established, and a fuzzy SVPWM-DTC control strategy is used to simulate and verify, and the outer rotor permanent magnet motor drive plate is made. The DSP floating-point motor control chip TMS320F28335 is used as the core controller to complete the development of the hardware platform. According to the hardware circuit, the related control software is compiled under the CCS integrated compiling environment. Firstly, the physical model of the outer rotor permanent magnet motor is constructed, and the physical structure parameters and performance analysis of the outer rotor permanent magnet motor are studied by using Ansoft/RMxprt software. The two dimensional electromagnetic field of the outer rotor permanent magnet motor is simulated and analyzed. The results show that the performance of the external rotor permanent magnet motor is reasonable. Secondly, in order to construct the mathematical model of the outer rotor permanent magnet motor, the DQ shaft system is selected by comparing the three commonly used coordinate systems, and the direct torque control principle and system construction of the permanent magnet synchronous motor are introduced, as well as several important components. The rationality of the mathematical model is verified and the theoretical support for the control strategy is provided. Thirdly, based on the above model, a fuzzy SVPWM-DTC system model and traditional DTC system model are established based on rotational speed fuzzy PID and SVPWM-DTC system, and the simulation results are compared and analyzed. The simulation results show that the control algorithm of fuzzy SVPWM-DTC outer rotor permanent magnet motor has a good effect on restraining electromagnetic torque and stator flux ripple, and achieves the desired effect. Finally, the external rotor permanent magnet motor control system with TMS320F28335 as the core is developed, and the power inverter module is designed with the IR2136 power driver chip and the DSP28335 built-in module, and the peripheral circuit is designed. The PCB board is made and the power inverter module is welded. The optocoupler isolation circuit is set up to improve the anti-interference ability. The software program of the control system is written under the CCS environment combined with the hardware circuit to complete the design of the duty cycle of the trigger module.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM351

【参考文献】