According to the specific characteristics of elevator door machine,a rare-earth permanent magnetic brushless DC motor speed-adjustable system is developed in this paper.

• 针对电梯门机的使用特点,研制出专用的稀土永磁无刷直流电机调速系统,实现了门宽的自学习、运行参数的修改及按给定曲线调速运行等功能。