LONG SHUNT COMPOUND MOTOR

3. Compound Wound DC Motor
- Where its winding has series field and shunt field winding either connect short shunt or long shunt
Speed Characteristics: variable or adjustable speed
Torque characteristics: high starting torque
Uses: milling machine, punching machine, elevator, crane etc.

2. Shunt Wound DC Motor
A self excited motor where its field winding called shunt field and it is connected across the armature.
Speed characteristics: nearly constant or adjustable speed
Torque characteristics: medium starting torque
Uses: fan, pump, grinder, blower

Notes: to reverse the direction of rotation of the motor, interchange the brushes or reverse the connection of the field winding but not the brush.

DC Motor

- A continuous energy conversion device used to convert electrical energy to mechanical energy.

General types of Self Excited Motors
1. Series Motor
A motor that has series field winding. Series field winding is connected in series with the armature.

Speed characteristics: variable speed
Torque Characteristics: high starting torque
Uses: elevator, crane, conveyor, hoist, gear drive
Note: to reverse the direction of rotation of the motor, interchange the motor.
Cause: never operate the motor of unloaded because it will race or run away.