1、 本科生毕业设计本科生毕业设计 直流无刷电动机控制系统设计直流无刷电动机控制系统设计 Brushless dc motor control system design 摘 要 当今社会，电动机的发展十分迅速，无刷直流电机是一种新型电机。直流 无刷电机主要由转子、定子和转子位置检测元件等组成,它具有结构简单、效率 高、工作特性优良等特点,而且具有可靠性更高、制造维护更方便、应用范围更 广泛、体积更小、控制更容易等优点。因此对无刷直流电动机及其控制器研究 具有很大意义。本课题主要是根据直流无刷专用控制器 MC33035 与 MC33039 相 结合，通过融合电路设计速度闭环电路的控制系统。首先，以
2、直流无刷电动机 控制器的研究现状为出发点，对直流无刷电动机的原理及结构进行了总述，详 细分析了直流无刷电机的运行特性，推导出了其传递函数，并且创立了直流无 刷电动机的数学模型。讲述了本系统的总体设计方法和思路，建立了系统的总 体框架，然后介绍了主电路设计、控制器外围电路设计以及 MOSFET 驱动电路设 计，其中重点讲述了系统各个功能模块的工作原理和作用，以及其硬件设备设 计和实现。在课题的最后阶段对直流无刷电机系统控制效果专门进行了实验数 据分析，并且对总体的设计过程做出了总结。 关键词：关键词：直流无刷电动机；开闭环电路；双闭环调速；MOSFET 驱动 ABSTRACT Nowadays
3、society，motor has spread all areas of national economy and Peoples Daily life, and the Brushless DC motor, as a new mechanical and electrical integration, is rapidly matured in recent years. The motor consists of the stator, rotor and rotor position detection devices etc. In the absence of excitatio
4、n device, it takes advantage of high efficiency, simple structure and excellent features, whats more, it is smaller, more reliable, easier to control and more convenient to maintain and manufacture, and it has more extensive application scope. All the advantages mentioned above make the brushless mo
5、tors and their control device of great significance. This design is mainly produced by ON Semiconductor MC33035 and MC33039 design of the closed-loop brushless motor speed controller. First, this paper starts from the current research situation of brushless DC motor controller. The structure of the
6、brushless DC motor and principle are reviewed to establish a mathematical model of brushless DC motor, and a detailed analysis of the operational characteristics of the motor is derived out of its transfer function. This part describes the overall design of this system and establishes the overall framework of the system. Then, the paper introduces the main circuit design, MOSFET driver circuit design and controller peripherals circuit design, including emphatically expounds the functional
