Difference Between Squirrel Cage & Slip Ring Induction Motor - SKengineers

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DIFFERENCE BETWEEN SQUIRREL CAGE INDUCTION MOTOR & SLIP RING INDUCTION MOTOR

Sr. No.

COMPARATIVE POINTS

SQUIRREL CAGE INDUCTION MOTOR

SLIP RING INDUCTION MOTOR

1.

CONSTRUCTION

More simple and robust construction.

Less simple construction.

2.

COST

Cheaper

Costlier

3.

STARTING

The motor requires

1.      Star delta stater.

2.      Stator resistance starter.

3.      Auto-transformer starter.

The motor requires

1.      Rotor resistance starter.

4.

STARTING TORQUE

Low starting torque.

High starting torque.

5.

PULL OUT TORQUE

greater

lesser

6.

EFFICIENCY

More efficiency

Less efficiency

7.

POWER FACTOR

Better

poor

8.

SPEED CONTROLLING

Speed controlling difficult.

Speed controlling easier.

9.

MAINTENANCE

Requires less maintenance.

Requires more maintenance.

10.

FIRE HAZARDS

Safer from the view point of fire hazards as there are no rubbing contacts.

Risk of fire hazards due to sparkling at the brushes.

11.

APPLICATIONS

1.      Lathe machine

2.      Fan

3.      Blower

4.      Drilling machine

 

1.      Hoist

2.      Cranes

3.      elevators

12.

BRUSHES

Absent

present

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