IM CONSTRUCTION.ppt

INDUCTION MOTOR CONSTRUCTION

INDUCTION MOTOR CONSTRUCTION

An induction motor has two main parts

STATORROTOR

Electromagnetism is the principle.

CONSTRUCTION OF STATORSteel frame Hollow , cylindrical core laminations slots

MZS FKEE, UMP

4

CONSTRUCTION OF STATOREach Each grouping of coilsgrouping of coils, together with the steel core it surrounds, form an electromagnet.

The stator windings are connected directly to the power source.

5

• Types

Squirrel cage type:Squirrel cage type:Copper bars embedded in the rotor slots Shorted at both end by end ringsSimple, low cost, robust, low maintenance

Wound rotor type:Wound rotor type:Winding is wound by wires. Slip rings and brushes .Easy to control speed, more expensive.

most common is the “squirrel cage”

ROTOR CONSTRUCTION

Squirrel cage rotor

Wound rotor

Notice the slip rings

MZS FKEE, UMP

7

SQUIRRELCAGE ROTOR CONSTRUCTION

Squirrel-Cage Rotor

/rotor winding/rotor winding

Short circuits allShort circuits allrotor bars.rotor bars.

WOUND-ROTOR CONSTRUCTION