Here are the uses-

DC Motors-

Series motors-

Traction system, Cranes, air compressors, Vaccum Cleaner, Sewing machine,etc. 

Shunt motors-

Lathe Machines, Centrifugal Pumps, Fans, Blowers, Conveyors, Lifts, Weaving Machine, Spinning machines,etc.

Compound motors-

Presses, Shears, Conveyors, Elevators, Rolling Mills, Heavy Planners,etc.

DC Generators-

Separately excited DC Generators-

In laboratories for testing as they have a wide range of voltage output.

Used as a supply source of DC motors.

Shunt wound Generators-

DC shunt wound generators are used for lighting purposes.

Used to charge the battery.

Providing excitation to the alternators.

Series Wound Generators-

DC series wound generators are used in DC locomotives for regenerative braking for providing field excitation current.

Used as a booster in distribution networks.

Over compounded cumulative generators are used in lighting and heavy power supply.

Flat compounded generators are used in offices, hotels, homes, schools, etc.

Differentially compounded generators are mainly used for arc welding purpose.

Hello,Jatin

The various applications of DC shunt motor are in Lathe Machines, Centrifugal Pumps, Fans, Blowers, Conveyors, Lifts, Weaving Machine, Spinning machines, etc. The compound motors are used where higher starting torque and fairly constant speed is required.

Hope this helps.

Main purpose is to convert electrical energy to mechanical energy.

main function  as far as the DC motor is concerned is to commute or relay the supply current from the mains to the armature winding housed over a rotating structure through the brushes of DC motor.