what is the step motor?

Stepper motor is a kind of electrical pulses into angular displacement of the actuator.When stepping drive receives a pulse signal,it drives stepper motor according to set the direction of a fixed Angle (i.e.,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 acmotortrading.blogspot.com rotation speed and acceleration,so as to achieve the purpose of regulating.2,the classification of the stepper motor,stepper motor in three kinds: permanent magnet (PM),reactive (VR) and hybrid (HB) : general for two phase permanent magnet stepping,torque and volume is small,the stepping Angle of 7.5 degrees or 15 degrees;Reactive step for three-phase commonly,can achieve high torque output,stepper Angle of 1.5 degrees commonly,but the noise and vibration are very big.

Hybrid stepping refers to a mixture of permanent magnet and the advantages of reactive.Five phase and it is divided into two phase,three- phase,two-phase stepper Angle generally 1.8 degrees,the application of the stepper motor single phase induction motor is more extensive.3,how to determine the stepper motor driver dc power supply: a.determine the voltage of hybrid stepping motor drive power supply voltage is usually A wide range,such as 2 m530 power supply voltage is 24~45 VDC),the power supply voltage is usually according to the requirements of the machine work speed and response to choose.If the motor rotation speed higher demand or response quickly,so the voltage value is high,but pay attention to the power supply voltage ripple cannot exceed the maximum input voltage of the drive,otherwise may damage the drives.

B.determination of current power supply current generally determined according to drive the output phase current of the I.If the linear power supply,power 1.1~1.3 times of the current generally desirable I;If the switch power pumps supply,power supply current generally desirable I 1.5~2.0 times. 4,stepper motor and ac servo motor performance comparison: stepping motor is a kind of discrete movement of the device,it has the nature of the contact and the modern digital control technology.In the current domestic digital control system,stepping motor is widely used.With the emergence of digital ac servo system,ac servo motors are increasingly used in the digital control system.In order to adapt to the development trend of digital control,motion control systems mostly adopt stepper motor or all-digital ac servo motor as the executive motor.Although both similar on control mode (signal pulse sequence and direction),but in the use of performance and applications where there is a big difference.The use of both performance comparison.