Stepper Motor Interview Question Answer - 3

Which type of stepper motor is generally operated by two phases?

• PM stepper motor

Whether the direction of the stepper motor depends upon polarity of stator current?

• The direction of the stepper motor is independent of polarity of stator current.

Stepper Motor Interview Question Answer - 2

State the main disadvantage of the VR stepper motor.

Disadvantage of VR stepper motor

• The main disadvantage of the VR stepper motor is that it hasn’t any detent torque ( which is necessary to retain the rotor at main position in the case of power failure)

Explain the term : Multi stack VR stepper motor

Multi stack VR stepper motor

• It consists of number of axially isolated sections or stacks along its axial length. 

Stepper Motor Interview Question Answer - 1

Give the reason behind the motor name as stepper motor or step motor.

Stepper motor

It is an electrical motor in which rotor rotates through fixed angle in response to each input current pulse.

State the different types of stepper motor.

Types of stepper motor

Variable reluctance (VR) stepper motor

Permanent magnet (PM) stepper motor