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

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 brushless motor.  This can be done by turning the DC motor inside out, it means that the winding placed on the stator and permanent magnet on the rotor. The current reversal in the BLDC motor is automatically possible by using electronic switch instead of commutator and brushes.

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

PM Brushless DC motor ( BLDC )( Trapezoidal waveforms )

Which are the main parts of the BLDC motor?

Stator

It consists of winding similar to DC motor armature.