Sliprings are used in wound-rotor induction motors, so that external variable resistors can be incorporated in the rotor circuit in order to provide speed control.
It depends on the type of motor: commonly either three, or none.
induction motor start by magnetic motor
Yes the Induction motor works on Electromagnetic induction principle.
A single phase induction motor is only ever used for small loads. Functionally, an induction motor is an AC motor, in which the current is produced by electromagnetic induction.
Standard induction motor has a closed squirrel cage rotor, where as open ended induction motor has split phase rotor.
Induction motor is an AC electric motor which uses electromagnetic induction to induce the electric current in the rotor to produce torque.
AC Induction Motor
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.
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.