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1. Draw the magnetization curve of the generator results of run (1)? 2. Draw the external characteristics at N= constant. And discusses the results? 3. Got out the internal charact. From the external charact.? 4. Explain the effect of speed on the open circuit char.?

1. Draw the magnetization curve of the generator results of run (1)? 2. Draw the external characteristics at N= constant. And discusses the results? 3. Got out the internal charact. From the external charact.? 4. Explain the effect of speed on the open circuit char.?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Discussion: 1. Draw the magnetization curve of the generator results of run (1)? 2. Draw the external characteristics at N= constant. And discusses the results? 3. Got out the internal charact. From the external charact.? 4. Explain the effect of speed on the open circuit char.?
Run (2): (External characteristics) 1. With the connection as shown in fig (2) operate the generator at rated speed keeping it constant. 2. Adjust the field rheostat to allow approx.., the rated field current with rated voltage says 220V. 3. Change the load current by varying load starting from IL = 0 till a rated value with 5 steps. Take reading of load terminal voltage. Observation table Steps No. Load terminal voltage Load current Field current A 220 V D.C AA H Supply HH Load Fig. 1 Discussion: 1. Draw the magnetization curve of the generator results of run (1)? 2. Draw the external characteristics at N= constant. And discusses the results? 3. Got out the internal charact. From the external charact.? 4. Explain the effect of speed on the open circuit char.?
Transcribed Image Text:Run (2): (External characteristics) 1. With the connection as shown in fig (2) operate the generator at rated speed keeping it constant. 2. Adjust the field rheostat to allow approx.., the rated field current with rated voltage says 220V. 3. Change the load current by varying load starting from IL = 0 till a rated value with 5 steps. Take reading of load terminal voltage. Observation table Steps No. Load terminal voltage Load current Field current A 220 V D.C AA H Supply HH Load Fig. 1 Discussion: 1. Draw the magnetization curve of the generator results of run (1)? 2. Draw the external characteristics at N= constant. And discusses the results? 3. Got out the internal charact. From the external charact.? 4. Explain the effect of speed on the open circuit char.?
Exp. 3 Characteristics of separately Excited generator Objective: The object of this experiment is to verity the factors, which affect the building voltage in separately characteristics, and load saturation characteristics, regulating characteristics of the generator. excited generator, the external Procedure: Take the name plate data of the generator used in the experiment. Run (1): (No - load characteristics) 1. Connect the circuit as in fig 1, switch (S) is open with the slide (S) of the rheostat at zero position in order to start with zero field current (IF). 2. Run the generator at rated speed record the reading of voltmeter connected across armature terminals of the generator. 3. Switch on d.c supply to the field winding and increase. IF gradually in approx. equal several steps, record its value with the values of the open - circuit voltage (E) between the outside terminals of the generator which is operating in this case at N.L. 4. Decrease If gradually in approx. equal several steps as in step 3 and record the values of If and E especially at If = 0. 5. This value is the e.m f due to the residual magnetism. 6. Plot armature voltage versus the field current. Observation table Field current in increasing order (If) Field in describing order (IF) Armature Step voltage 1 2 3 4
Transcribed Image Text:Exp. 3 Characteristics of separately Excited generator Objective: The object of this experiment is to verity the factors, which affect the building voltage in separately characteristics, and load saturation characteristics, regulating characteristics of the generator. excited generator, the external Procedure: Take the name plate data of the generator used in the experiment. Run (1): (No - load characteristics) 1. Connect the circuit as in fig 1, switch (S) is open with the slide (S) of the rheostat at zero position in order to start with zero field current (IF). 2. Run the generator at rated speed record the reading of voltmeter connected across armature terminals of the generator. 3. Switch on d.c supply to the field winding and increase. IF gradually in approx. equal several steps, record its value with the values of the open - circuit voltage (E) between the outside terminals of the generator which is operating in this case at N.L. 4. Decrease If gradually in approx. equal several steps as in step 3 and record the values of If and E especially at If = 0. 5. This value is the e.m f due to the residual magnetism. 6. Plot armature voltage versus the field current. Observation table Field current in increasing order (If) Field in describing order (IF) Armature Step voltage 1 2 3 4
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