对步进电机原理和驱动方式的详细介绍及分析，对我们在做步进电机驱动程序和硬件电路时很有帮助-Principle of stepper motor and drive means a detailed descr iption and analysis, we are doing stepper motor driver and the hardware circuit helpful

直流无刷电机的控制和驱动，可以使电机正反转。(The control and drive of Brushless DC motor can make the motor rotate forward and backward.)