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Difference between AC Motor and DC Motor

 

BASISAC MOTORDC MOTOR
Nature of the Input CurrentAlternating Current is the main input power in the AC motorDirect Current is the main input power in the DC motor
Supply SourcesThree-phase or single-phase power from the supply mainsEnergy is obtained from batteries, cells, etc.
Commutation ProcessAbsent in AC motorPresent in DC motor
Supply PhaseBoth single-phase and three-phase supply are usedOnly single-phase supply is used
Number of terminalsThere are 3 input terminals RYB.There are two input terminals Positive and negative
Carbon brushesNo carbon brushesThere are carbon brushes in the DC Motor
ApplicationsSuitable for large and industrial applicationsDC motor is used in small and domestic applications
StartingAC Motor is not self-starting. It requires some external starting equipmentDC Motor is self-starting
Position of ArmatureThe Armature is stationary and the magnetic field rotatesThe armature rotates while the magnetic field remains stationary.
Maintenance costLess expensive as compared to DC MotorDC Motor maintenance is more expensive.








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