Stepper motors as actuators,electromechanical integration is one of the key products,widely used in a variety of automatic control systems.With the development of microelectronics and computer technology,increasing demand for stepper motors,all applications in all areas of the national economy.
Stepper motor is an electrical pulse into the angular displacement of the implementing agencies.When the stepper driver receives a pulse signal,it drives the direction of stepping motor rotation by setting a fixed point (called "step angle"),its angle of rotation is fixed step by step operation.Pulse number can be controlled by controlling the angular displacement,so as to achieve accurate positioning purposes; also can control the pulse frequency to control motor rotation speed and acceleration,so as to achieve speed control purposes.Stepper motor control can be used as a special motor,its no accumulation of error (accuracy of 100%) is widely used in various open-loop control.
Stepper motor driver is not with ordinary subdivision,such as:use of three-phase six-shot,five-phase 10 film and so on,use low speed vibration phenomena occur,resulting in lost step.
The use of a sub driver,in the process of stepping motor driven reduction step angle,increased step resolution,increase smoothness,which can effectively solve the problem step throw.
The speed of winding step power control and power of the frequency shift depending on the order of the stator power rotation.Put up with the switch control of power flow off the switch circuit,a microcontroller port access switch gate control terminal to realize the single chip microcomputer to control the stepping motor.Has the following advantages:
1.Using high-speed chip technology,fast response;
2.Fully digital control,powerful,position / speed / torque control;
3.Miniaturization and high efficiency can go to the direction of development;
4.Output current to meet more applications.
Keywords:Stepper Moto
