基于C MEX S-函数直流无刷电机控制系统仿真建模研究

在分析直流无刷电机系统(BLDCM)数学模型的基础上,利用C语言编写S-函数,提出了BLDCM控制系统仿真建模的新方法.在Matlab/Simulink中,构造C MEX S-函数的三类简化结构,建立独立的功能模块,如电动机本体模块、速度控制模块、电流滞环控制模块等,再进行功能模块的有机整合,搭建BLDCM控制系统快速高效的仿真模型,为提高复杂系统模型的仿真速度、硬件控制器的设计与调试提供了新的思路.BLDCM系统采用双闭环控制:速度环采用PI控制,电流环采用滞环电流控制.仿真结果证明了采用C MEX S-函数方式建模的快速性和有效性.

Study on Modeling and Simulation of Brushless DC Motor Control System Based on C MEX S-function

Based on the mathematical model of the Brushless DC motor (BLDCM), a novel method for modeling and simulation of BLDCM control system written in C language and linked into Matlab has been proposed. Basically it is categorized into three minimum structures, then the isolated functional blocks, such as motor block, Speed controller block, Hysteresis current controller block, etc., can be modeled quickly. By the organic combination of these blocks, the model of BLDCM control system can be established efficiently. To guarantee the validity and speediness in simulation, in the double loop of control system, a PI controller is adopted in the speed loop and a hysteresis current controller is adopted in the current loop. The reasonability and validity have been testified by the simulation results and this novel method offers a new thoughtway for designing actual motors.