1.Show that if three phase currents, each of equal magnitude and differing in phase by 120 degree, flow in a three phase winding that are 120 degree apart from each other then it will produce a rotating magnetic field of a fixed magnitude.
1.Show that if three phase currents, each of equal magnitude and differing in phase by 120
degree, flow in a three phase winding that are 120 degree apart from each other then it will
produce a rotating magnetic field of a fixed magnitude.
2. A three phase, 5-hp, 60Hz, 115V, 4-pole induction motor is operating at rated voltage, rated frequency, and 125 percent rated load has an efficiency of 85.4 percent. The stator conductor loss, rotor copper loss and core loss are 223.2W, 153W, and 114.8W respectively.Sketch the power flow diagram, enter the given data, and determine i) shaft speed ii) shaft torque
3. Can single phase induction motor be self-started? Explain the operation of a split phase single phase induction motor?
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