![]() If the current in the other phase had been reversed, the motor would move 1 step (1.8 degrees) in the other direction. If the current in one phase is reversed, the motor will move 1 step (1.8 degrees) in a known direction. The maximum torque the motor can hold in place with rated DC current, is the rated holding torque. ![]() Forexample, in a 1.8 degree two phase step motor: When both phases are energized with DC current, the motor will stop rotating and hold in position. What is the operating principle of a stepper motor? In response to each individual control pulse and direction signal,the drive applies power to the motor windings to cause the rotor to take a step forward, a step in reverse, or hold in position. Stepping technology allows for the use of an open-loop controller – simplifying machine design and lowering total cost compared to a servo motor system. ![]() Stepper motors, with their ability to produce high torque at a low speed while minimizing vibration, are ideal for applications requiring quick positioning over a short distance. The motor's position can then be commanded to move and hold at one of these steps without any position sensor for feedback (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed. The motor and drive constitutes a low cost control system that is precise and simple to construct.Ī stepper motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. As the current is switched the motor rotates in precise steps of a fixed angle. The operation of step motors is controlled through electrical pulses that the drive converts to current flowing through the windings of the motor. What is a stepper motor? Stepper motor or step motor or stepping motor provide precise position and speed control, without the need for feedback devices to sense position.
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