"基于ARM的直流电机调速系统设计与实现"

本文旨在设计基于ARM的直流电机调速系统。首先，对设计背景和意义进行了论述。其次，介绍了利用PWM驱动直流电机的技术原理，即通过改变脉冲信号开关的比例来实现对直流电机速度方向的调节。针对L298N型直流电机驱动模块和LPC2114型ARM进行了详细的分析，并给出了它们之间的接线图。确定了LPC2114ARM的设计以及其电路基本要求，并设计了ARM和电位器之间的信号传输和电源电压转换。通过整流电路来实现整个方案的电源调配，并通过电位器输入信号调节占空比来实现直流电机速度方向的调节要求。最后，编写了PWM脉冲宽度调节程序来实现电机的驱动和转向的控制。文章关键词: 直流电机；脉冲宽度调制；L298N；LPC2114。 Overall, this article aims to design a direct current motor speed control system based on ARM. Firstly, the background and significance of the design are discussed. Secondly, the technical principle of using PWM to drive the DC motor is introduced, that is, by changing the ratio of pulse signal switches to achieve speed and direction control of the DC motor. The L298N DC motor drive module and LPC2114 ARM are analyzed in detail, and the wiring diagram between them is presented. The design and basic circuit requirements of the LPC2114ARM are determined, and the signal transmission and power supply voltage conversion between ARM and the potentiometer are designed. The power allocation of the entire scheme is implemented through a rectifier circuit, and the speed and direction adjustment of the DC motor is achieved by adjusting the duty cycle through the potentiometer input signal. Finally, a PWM pulse width modulation program is written to achieve motor drive and direction control. Keywords: DC motor; Pulse Width Modulation; L298N; LPC2114.