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Consider the following statements regarding a stepper motor: 1. The rotation angle of the motor is proportional to the input pulse. 2. The motor has full torque at standstill. 3. Speed and electric control signal of the motor vary mutually linearly. Which of the above statements are correct?

Consider the following statements regarding a stepper motor: 1. The rotation angle of the motor is proportional to the input pulse. 2. The motor has full torque at standstill. 3. Speed and electric control signal of the motor vary mutually linearly. Which of the above statements are correct? Correct Answer 1, 2 and 3

Concept:

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.

Advantages of stepper motor are:

  • The rotation angle of the motor is proportional to the input pulse
  • The motor has full torque at standstill
  • Its rotational speed varies directly proportional to the frequency of the pulse
  • Excellent response to starting, stopping and reversing.

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