Your question: What is the working principle of stepper motor?

What is stepper motor and its type?

Stepper motors are a type of DC synchronous motor. Whereas the rotation of an induction motor is largely uncontrollable, the rotation of a stepper motor can be controlled with a remarkable degree of precision. Stepper motors can produce full, instantaneous torque – even from a standstill.

Are stepper motors AC or DC?

Stepper motors are DC motors that move in discrete steps. They have multiple coils that are organized in groups called “phases”. By energizing each phase in sequence, the motor will rotate, one step at a time. With a computer controlled stepping you can achieve very precise positioning and/or speed control.

How do steppers work?

The stepper motor converts a pulsing electrical current, controlled by a stepper motor driver, into precise one-step movements of this gear-like toothed component around a central shaft. Each of these stepper motor pulses moves the rotor through one precise and fixed increment of a full turn.

What are the types of stepper motor?

There are three main types of stepper motors, they are:

  • Permanent magnet stepper.
  • Hybrid synchronous stepper.
  • Variable reluctance stepper.

Why is it called stepper motor?

Stepper motors are so named because each pulse of electricity turns the motor one step. Stepper motors are controlled by a driver, which sends the pulses into the motor causing it to turn.

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What is full step in stepper motor?


During the full-step drive, the stepper motor driver energizes the two coils of the two-phase stepper motor in a pulse/direction command. Each pulse of this drive mode causes the motor to move a basic step angle.