Design and Realization of Control System of Brushless DC Motor Based on ARM

Abstract

With the development of science and technology, people are demanding more and more sophisticated technology products, especially in some advanced and high-end research fields. For example, in terms of medical devices, home appliances, and transportation vehicles, there are higher demands on them that they can become more and more compact and sophisticated to meet people’s needs better. Most of the daily products are inseparable from the motor drive, and the convenience of motor drive will bring about rapid development and improvement in these fields to make these technologies meet people’s requirements. Based on the powerful simulation function of SIMULINK, the brushless DC motor control system simulation was completed. In the thesis, through the establishment of two simulation models, the theoretical analysis of the principle and mathematical model of brushless DC motor is carried out. Finally, the brushless DC motor control system is designed on the basis of simulation and theoretical analysis, and the hardware selection and circuit design are carried out. The main control chip of the control system is the LPC1766 of NXP Company, which is based on ARM’s latest Contex-M3 kernel. Besides, the data transmission is realized by the Modbus bus protocol in this control system, and the software programming is carried out in the U-Vision4 development environment, of which the implementation process is presented by flowchart.