Electrical Engineering Experiments by G.P. Chhalotra

Author:G.P. Chhalotra [Munir M. Hamad]
Language: eng
Format: epub, mobi, pdf
Publisher: Mercury Learning and Information
Published: 2017-12-26T16:00:00+00:00

Figure 33.1

Arrange connections according to the circuit diagram. Start the mover and run the motor at nearly synchronous speed. Keep the exciter open circuited by connecting a voltmeter, if necessary. Supply a reduced voltage of 50 c/s frequency with the help of an autotransformer. Read the applied voltage, current, and the induced voltage in the field. Determine the resistance of each phase of the winding by the ammeter-voltmeter method.

EXPERIMENTAL RESULTS

The armature resistance determined will be 0.69 or 0.7 ohms.

A voltage of 2 V produced a current of 2.9 A in the winding. These data are given here for an idea of the experiment.

33.4Calculations

Xd and Xq will be given by

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