1, what is the dc motor? Answer: the output or input for the direct current to the rotation of the motor, known as the dc motor 2, a: what is ac motor output or input for the rotation of the ac power motor, known as ac motor. 3, what is the stepper motor a: stepping motor is a kind of electrical pulses into angular displacement of the actuator. Popular point: when the stepper motor driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed point (And the step Angle)。 You can by controlling the pulse number to control the amount of angular displacement, so as to achieve the purpose of accurate positioning; At the same time you can control the pulse frequency to control motor rotation speed and acceleration, so as to achieve speed of mesh. Stepping motor in three kinds: permanent magnet (PM), equation (VR)And hybrid (HB)。 Permanent magnet stepping, generally for two phase, torque and volume is small, step Angle is commonly 7. 5 or 15 degrees; Reactive step for three-phase commonly, can achieve high torque output, stepper Angle generally to 1. 5 degrees, but the noise and vibration are very big. In Europe and the United States and other developed countries have been eliminated in the 80 s; Hybrid stepping refers to a mixture of permanent magnet and the advantages of reactive. It is divided into two and five phase: two phase stepper Angle generally to 1. 8 degrees and five phase stepping Angle generally is 0. 72 degrees. The application of the stepper motor is more widely. 4, what is the stepper motor a: motor stepper motor is also called implementation, in the automatic control system, is used as actuators, converts the received electrical signal into angular displacement or velocity of motor shaft output. Divided into two major categories of dc and ac stepper motor, its main characteristic is, when the signal voltage is zero no rotation, speed decreases with the increase of torque and uniform. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone: