railway UPMRC SCTO 2024 Mock Test Electrical Machines Single Phase Motor and Special Machines Permanent Magnet DC Motor
Which of the following type of motors has the armature placed in rotor and the field winding replaced by permanent magnet poles fixed due to the stator to produce the required magnetic field?
1
Armature controlled DC servomotors
2
Electromagnetic field DC motors
3
Permanent magnet DC motors
4
Field controlled DC servomotors