larger synchronous motors
start with a squirrel cage and run when dc is applied thru the slip rings
small motors can have magnets in the rotor
these can accelerate from rest to synchronous speed in a few seconds
yes
short the rotor terminals.
Slip Ring Induction Motor and Squirrel Cage Indution Motor
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
slip ring, synchronous, and squirrel cage induction motors....
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According to types ofrotors....Induction motors are classified into two types. They are1.sqirrel guage induction motor2.slip ring induction motor/...........
YES
slip power is a power which is develop by the induced voltage and current in an induction motor
They are the same thing: (Nsync - N)/Nsync, or 1 - N/Nsync
Squirrel Cage Induction Motor Disadvantages:Some of disadvantages or demerits of squirrel cage induction motors are listed below:Main disadvantage of squirrel cage induction motor is that they have poor starting torque and high starting currents. Starting torque will be in the order of 1.5 to 2 times the full load torque and starting current is as high as 5 to 9 times the full load current. In slip ring induction motors, higher starting torque can be attained by providing an external resistance in the rotor circuits during starting of the slip-ring induction motor. This arrangement in slip-ring induction motors also reduces the high inrush currents during starting of induction motor.Squirrel cage induction motors are more sensitive to the supply voltage fluctuations. When the supply voltage is reduced, induction motor draws more current. During voltage surges, increase in voltage saturates themagnetic components of the squirrel cage induction motor.Speed control is not possible in squirrel cage induction motor. This is one of the major diadvantages of squirrel cage induction motors.The total energy loss during starting of squirrel cage motor is more compared to slip ring motors. This point is significant if the application involves frequent starting
Ac motor have slip ring, to remove the slip ring,connected to the commutator its a dc motor.