【作者】 李金飞；

【导师】 王慧贞；

【作者基本信息】 南京航空航天大学 ， 电力电子与电力传动， 2009， 硕士

【摘要】 近年来,随着稀土永磁材料、电力电子技术的发展以及微处理器性能的提高,无刷直流电动机得到了广泛的研究和应用。尤其作为中小功率高性能调速电机和伺服电机,在航空航天、军事、家电及工业领域具有广阔的应用前景和研究价值。本文以航空应用为背景,研制了一套基于DSP的全数字高性能无刷直流电动机控制系统。首先介绍了无刷直流电动机的发展历程和趋势,分析了无刷直流电动机的工作原理,建立了数学模型。在此基础上,对五种PWM斩波方式分析比较,详细分析了各种斩波方式下非导通相的电流拖尾现象,从而为研究抑制转矩脉动提供了条件。给出电流、速度双环控制系统的详细设计,调节器采用PI控制器。并利用Matlab/Simulink仿真软件建立系统模型,对电流、速度双闭环进行仿真研究,进一步验证了本文所提方案的正确性,指导系统的制作和调试。在理论分析和仿真研究的基础上,设计制作了一台850W全数字无刷直流电动机控制系统原理样机。该系统以TI公司生产的TMS320F2812DSP芯片作为控制核心,采用功率MOSFET构建三相桥式电路作为主功率逆变模块,IR3120作为驱动芯片。在硬件平台上,采用C语言模块化编程思想编写系统控制软件,并通过CAN总线与上位机通讯,实现实时控制和状态显示。最后,对系统进行调试,给出了主要实验波形。验证了五种PWM斩波方式下的拖尾电流,并根据系统实验测试对速度调节器进行了优化,实验结果表明系统具有良好的动态和静态性能,验证了理论和仿真分析的正确性,为系统的进一步深入研究和开发奠定了坚实的基础。更多还原

【Abstract】 In recent years, with the development of the rare-earth permanent-magnet materials, the power electronic technology and the microprocessor performance, brushless DC motors (BLDCM) have received more and more attention in many applications, including aerospace, military, the electrical appliances and the industrial fields, and they serve as the low power high performance velocity modulation electrical machinery and the servo electrical machinery.In this dissertation, a full-digital high performance BLDCM control system is designed for aeronautic application. The research and development trend of BLDCM are firstly presented, and its working principle and mathematical model are analyzed. Based on these, five PWM chopping modes and the principle of current tails in non-conducting winding are analyzed, which is used for torque ripple suppression. The design for the control system including current loop and speed loop is given with PI controller. The simulation model of the control system is established in Matlab/Simulink, and the simulation results verify correctness of the control scheme and are helpful to the design and debugging of the prototype.Based on theoretical analyses and simulation results, a 850W prototype of full-digital BLDCM control system is designed, using TI’s DSP-TMS320F2812 as the control core, a three phase bridge circuit as the power inverter unit with Power MOSFET and IR3120 as driving chip. The terms of the hardware platforms, the modularization of C programming language is applied in system software. Real-time control and state display are established using CAN communication with main computer.Finally, the control system is debugged. The main experimental waveforms are given and speed controller is optimized based on the test. The experimental results verify current tails in non-conducting winding. They show that the control system can achieve good steady and dynamic performances and validate the analysis and simulation, which is helpful to further research.更多还原