30 March 2020

Switch Reluctance Motor ( SRM ) Interview Question Answer - 1


1
What do you mean by term ‘Reluctance motor’?


Reluctance motor
  • It is an electrical motor in which torque is produced due to position of rotor such that inductance of the excitation winding becomes maximum.

Stepper Motor Interview Question Answer - 3


31
Which type of stepper motor is generally operated by two phase?


PM stepper motor

32
Whether the direction of the stepper motor depends upon polarity of stator current?

Stepper Motor Interview Question Answer - 2


16
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

Stepper Motor Interview Question Answer - 1


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.

Permanent Magnet DC ( PMDC ) Motor Interview Question Answer - 2


11
Describe the construction difference between DC motor and BLDC motor.


DC Motor – BLDC Motor

  • The rotor winding must be eliminated from the DC motor in order to make it brush less motor.

Permanent Magnet DC ( PMDC ) Motor Interview Question Answer - 1


1
Describe the different types of Permanent magnet synchronous motor.


The Permanent magnet synchronous motor is classified as below
  • Permanent magnet synchronous motor ( BLAC )( Sinusoidal waveforms )

29 March 2020

Design of Transformer Interview Question Answer - 8


106
Which type of core construction is preferred in the large power transformer?


Cruciform core