Answer / sharath

in slip-ring motors brushes are required to short the rotor
winding with the help of resistance where as in squirrel
cage rotor winding are internally shorted with end-rings so
they dnot required brushes.

Answer / gaurav tripathi

because three phase a.c. supply is given to stator "NOT" on
rotor

Answer / raul

there are basically two purposes for slip rings n brushes
in slip ring rotor......firstly they r used to short ckt
the rotor windings while in the squirel cage motors the
rotors winding r in-built short ckted by d heavy end
rings..........secondly they r used for speed control of
the motor by connecting external resistors wid the help of
slip ring n associated brushes.......

Answer / mohamed idris

slip and brushes are not used in squrriel cage induction...
bec rotor windings are look like a cage... therefore
windings are short circuted by end ring.... therfore no need
to use slip and brushes in squrriel cage motor

for 750 kw LT load what will be the ht kva

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