1、I 摘要 目前，电机在控制系统中的应用越来越广泛，由此凸现了电机控制的重要性。论 文设计了一个基于现场可编程门阵列（FPGA）的直流电机速度控制系统。文章从定 子部分、转子部分介绍了直流电机的基本结构；分析了直流电动机和直流发电机各自 的工作原理及其工作特点，总结了直流电机的一般工作原理；从直流电机的起动、转 向、转速描述了电机的调速控制原理。系统设计以FPGA最小系统作主控制部分， 通过控制调节脉冲占空比的大小改变输出电压的大小， 从而达到控制直流电机的转速 的目的；其受控部分包括按键输入电路、LED数码管显示电路、PWM驱动电路、 速度检测电路，并分析了的各组成单元电路的作用及特点，通过Q
2、uartus II软件进 行系统的功能仿真。 关键词：FPGA；直流电机；电机控制；PWM II ABSTRACT At present ,the application in the control system of electrical machinery is more and more extensively , and has protrudingly appeared the importance of electrical machinery control from this . This design designed one baseds on the DC-motor
3、speed control system of field programmable gate array ( FPGA ) . This text reaches other parts and has introduced the basic structure of current-motor from stator part and rotor part .Has analysed direct current motive and direct current electric generator respectively work principle and his work ch
4、aracteristic , and has summed up the general work principle , use and his the most excellent shortcoming of current-motor Starting and turns to and has rotated speed from the current-motor has been described the accent of electrical machinery and has fastly controlled the principle . The system design is decided and is controlled the part with FPGAs minimal system , By way of control adjusts the pulse occupies to empty than the dimension of big or small change output voltage , thus achieves the
