【作者】 李丹；

【导师】 刘凤春；

【作者基本信息】 大连理工大学 ， 电工理论与新技术， 2005， 硕士

【摘要】 无刷直流电机是功率半导体和永磁材料一体化的新型电机,它既具有直流无刷电机优良的调速性能,又具有交流电机结构简单、运行可靠、维护方便等一系列优点。无刷直流电机还具有运行效率高、易于控制等特点。目前,在工业控制领域中得到了越来越广泛的应用,尤其在调速和伺服领域呈现出良好的应用前景。 首先,论文分析了无刷直流电机控制系统基本构成、工作原理,建立了无刷直流电机的数学模型。由于无刷直流电机在低速和直接驱动时的转矩脉动比较大,在研究了无刷直流电机工作和控制原理的基础上,对导致电流脉动和转矩脉动的原因进行了分析,深入研究了转矩抑制和电流控制的方法。 其次,依据复杂可编程逻辑CPLD芯片自身的特点,根据系统控制策略的要求,将无刷直流电机控制中所需的一些硬件逻辑电路通过Verilog HDL硬件描述语言来实现,并讨论了单独应用此芯片进行电机控制的缺点,提出了利用CPLD结合单片机同时进行控制的优点。 最后,在提出上述控制策略的基础上,以ALTERA公司的CPLD芯片和ATMEL公司的AVR单片机作为控制器的核心,完成了无刷直流电机控制器所有硬件的设计、制造和调试;软件设计中采用电流、速度双闭环调速的方式,并完成了相应功能的编程、调试工作,最后对硬件和软件的可靠性问题进行了详细的讨论。 实验结果表明,本文提出的驱动控制系统具有运行性能良好,调试方便,升级换代容易等特点,为后续的研究工作提供了实验基础和借鉴。更多还原

【Abstract】 Brushless Direct Current (BLDC) motor, which is combinations of permanent-magnet AC motors and inverters, has the virtues of not only the simplicity in their control of DC motor, but also the high efficiency and reliability of AC motor. Recently Brushless DC motor is increasingly being used in the industry area widely, especially in high-performance applications.Firstly, the basic elements and the operating principle of the control system are analyzed .The mathematic model of Brushless DC motor is also researched in this thesis. Because of brushless motor’s large torque ripple during low speed and direct driving, it is the study focus of Brushless DC motor applications how to reduce torque ripples and current ripples.Furthermore, On the basis of the characters of Complex Programmed Logic Device, the paper has realized some special circuits with Verilog Hardware Description Language based on the principle of the control system. And it discusses the disadvantages when using a single Complex Programmed Logic Device chip. A new strategy using Complex Programmed Logic Device chips and MCU to control Brushless DC motor is analyzed.Finally, the paper has designed and finished Motor controller with Complex Programmed Logic Device chips made in ALTERA and AVR MCU made in ATMEL. In order to guarantee the velocity modulation’s precision and quick-response, a double closed-loop control for current and velocity has been adopted and the control strategy is realized by software using PI algorithm. The whole system’s hardware and software have been designed based on the system’s control strategy and the reliable-designing question has been discussed in the paper.The result of the experiment show the proposed control solution is feasible, which provides the basis and useful reference for later research.更多还原