because IM draws 4 to 5 times the rated current when it is connected to the supply directly
in order to start the IM smoothly we need starters
1.star delta starter
2.auto transformer starter
DOL starter for direct starting for smaller capacity IM (upto 1HP)
Note:IM means Induction motor
Induction motor is an AC electric motor which uses electromagnetic induction to induce the electric current in the rotor to produce torque.
Induction motor used in industries for variable speed machines . Induction motor has always lagging power factor. Less cost compared to syn. Motor.
Standard induction motor has a closed squirrel cage rotor, where as open ended induction motor has split phase rotor.
Well that depends on the type of motor. DC motors use direct current DC and induction motors use alternation current AC.
slip power is a power which is develop by the induced voltage and current in an induction motor
The direction of a singular phase induction ac motor can be reversed by switching the capacitor in relation with the motor windings. When started in the reverse direction, the motor will maintain the same torque level that it had in the forward direction.
Yes the Induction motor works on Electromagnetic induction principle.
DOL(Direct Online starting) Star Delta starting Auto transformer starting Above methods are for squirrel cage induction motor Rotor resistance starting is used for wound rotor or slip ring induction motor
Induction motor is an AC electric motor which uses electromagnetic induction to induce the electric current in the rotor to produce torque.
A single phase induction motor is mainly used in fans.It is capacitor start capacitor run induction motor.In three phase induction motor squirrel cage induction motor is mainly used in elevators,lifts,cranes.slip ring induction motor is mainly used in electrically driven ships.
AC Induction Motor
1. Induction Motor has an air-gap but transformer has no air gap rather it is mutually link. 2. Induction Motor has high no-load current than transformer. 3. Induction Motor is a dynamic device. 4. Induction Motor has high power factor.
yes
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Induction motor used in industries for variable speed machines . Induction motor has always lagging power factor. Less cost compared to syn. Motor.
single-phase induction motor is used in ceiling fan.
Standard induction motor has a closed squirrel cage rotor, where as open ended induction motor has split phase rotor.