直接转矩控制与矢量控制的主要区别
直接转矩控制与矢量控制的主要区别
单相异步电动机的主要类型，及工作原理
步进电机的工作原理
PID控制， P、I、D三种控制的主要作用。
A stepper motor is an electro-mechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates indiscrete step increments when electrical command pulses are applied to it in the proper sequence. The motors rotation has several direct relationships to these applied input pulses. The sequence of the applied pulses is directly related to the direction of motor shafts rotation. The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied
