Transcription of 10. Starting Method for Induction Motors
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10. Starting Method for Induction Motors
3rd Class / AC MachinesDr. Inaam Ibrahim3410. Starting Method for Induction MotorsA 3-phase Induction motor is theoretically self stator of an Induction motor consists of 3-phase windings,which when connected to a 3-phase supply creates a rotatingmagnetic field. This will link and cut the rotor conductorswhich in turn will induce a current in the rotor conductors andcreate a rotor magnetic field. The magnetic field created by therotor will interact with the rotating magnetic field in the statorand produce , 3-phase Induction Motors employ a startingmethod not to provide a Starting torque at the rotor, butbecause of the following reasons;1) Reduce heavy Starting currents and prevent motor ) Provide overload and no-voltage are many methods in use to start 3-phase inductionmotors.
Starting Method for Induction Motors ... 3rd Class / AC Machines Dr. Inaam Ibrahim 35 Rotor Impedance Starter ... contacts of the motor to the full supply voltage. The starting current is very large, normally 6 to 8 times the rated current. The starting torque is likely to be 0.75 to 2 times the full load torque. In order to avoid excessive ...
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