How does a squirrel cage induction generator work?
The squirrel cage induction generator (SCIG) is attached to the wind turbine by means of a gearbox. The SCIG stator windings are connected to a back to back full power converter. The gearbox provides speed and torque conversions from a rotating power source to another device, using gear ratios.
Why squirrel cage rotor is used in induction motor?
Squirrel cage motors maximize electromagnetic induction by utilizing rotor bars to interact with the stator’s EMF. The stator usually contains windings of wire which carry an AC current; this current changes in sync with a sinusoidal curve (or “alternates”), which changes the current direction in the wire windings.
What is 3 phase squirrel cage induction?
A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism. The interaction of the magnetic fields produced by the stator and rotor windings produces a torque on the squirrel cage rotor.
How a squirrel cage rotor is constructed?
The entire rotor core is placed in a mould and the rotor bars & end-rings are cast into one piece. The metal commonly used is aluminium alloy. Some very small rotors which operate on the basis of eddy current, have their rotor as solid steel without any conductors.
How do you start a squirrel cage induction motor?
Starting in-rush current in squirrel cage motors is controlled by applying reduced voltage to the stator. These methods are sometimes called as reduced voltage methods for starting of squirrel cage induction motors….Starting of squirrel cage motors
- By using primary resistors.
- Autotransformer.
- Star-delta switches.
How is a squirrel cage motor constructed?
Parts that are required for the construction of squirrel cage induction motor are stator, rotor, fan, bearings. The stator consists of mechanically and electrically 120 degrees apart three-phase winding with metal housing and core. The shaft, a core, short-circuited copper bars are the parts of the rotor.