用C语言编写的在Simulink环境下对转速可调永磁直流电机进行数值仿真的S函数源代码。该仿真源代码的特点是：能够仿真目前广泛应用的H桥驱动PWM调制调速永磁直流电机。将功率器件H桥与电机本体的数学模型完整的结合到一起。执行效率很高，仿真结果与实验结果非常相近。-C language in the Simulink environment for adjustable speed permanent magnet DC motor simulation S-function source code. The simulation source code features : simulation can be widely applied to the H-bridge PWM drive permanent magnet DC motor speed control. Will power devices H-bridge and motor Ontology integrity of a mathematical model combining together. High efficiency in the implementation of simulation results and experimental results are very similar.