A synchronous, three-phase motor, connected in Y, with a frequency of 60Hz, 2300V, has a synchronous reactance of 110 per phase. The synchronous motor is a smooth pole motor. When delivering 200HP, the efficiency is calculated to be 90%, neglecting losses in the magnetic field. The power factor angle is 15 electrical degrees. Also neglect the ohmic resistance of the windings and calculate: a) The induced excitation voltage per phase. b) The line current. c) The power factor of the synchronous motor.
A synchronous, three-phase motor, connected in Y, with a frequency of 60Hz, 2300V, has a synchronous reactance of 110 per phase. The synchronous motor is a smooth pole motor. When delivering 200HP, the efficiency is calculated to be 90%, neglecting losses in the magnetic field. The power factor angle is 15 electrical degrees. Also neglect the ohmic resistance of the windings and calculate: a) The induced excitation voltage per phase. b) The line current. c) The power factor of the synchronous motor.
Chapter39: Synchronous Motor Operation
Section: Chapter Questions
Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...
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