Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 33, Problem 16RQ
When a repulsion-start induction-run motor reaches about 75% of rated full-load speed, it stops operating as a repulsion motor and starts operating as a squirrel-cage motor. What must be done to cause the motor to begin operating as a squirrel-cage motor?
Expert Solution & Answer
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Procedure:-
1- Connect the cct. shown in fig.(2).
a
ADDS DS
Fig.(2)
2-For resistive load, measure le output voltage by using oscilloscope ;then sketch this
wave.
3- Measure the average values ::f VL and IL:
4- Repeat steps 2 & 3 but for RL load.
Report:-
1- Calculate the D.C. output vcl age theoretically and compare it with the test value.
2- Calculate the harmonic cont :nts of the load voltage, and explain how filter
components may be selected.
3- Compare between the three-phase half & full-wave uncontrolled bridge rectifier.
4- Draw the waveform for the c:t. shown in fig.(2) but after replaced Di and D3 by
thyristors with a 30° and a2 = 90°
5- Draw the waveform for the cct. shown in fig.(2) but after replace the 6-diodes by 6-
thyristor.
6- Discuss your results.
Please solve No. 4
and 5
Please I want solution by handwritten
8
00
!
Required information
Consider the circuit given below.
0/2
points awarded
3 ΚΩ
www
t=0
6kM
Scored
R
1.5i Vc
1 μF
10 V
If R = 5.00 kQ, determine vao+).
The value of va(0) is 1.4545
V.
Chapter 33 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 33 - What are the three basic types of split-phase...Ch. 33 - The voltages of a two-phase system are how many...Ch. 33 - How are the start and run windings of a...Ch. 33 - In order to produce maximum starting torque in a...Ch. 33 - What is the advantage of the capacitor-start...Ch. 33 - On average, how many degrees out of phase with...Ch. 33 - What device is used to disconnect the start...Ch. 33 - Why does a split-phase motor continue to operate...Ch. 33 - How can the direction of rotation of a split-phase...Ch. 33 - If a dual-voltage split-phase motor is to be...
Ch. 33 - When determining the direction of rotation for a...Ch. 33 - What type of split-phase motor does not generally...Ch. 33 - What type of single-phase motor develops the...Ch. 33 - Prob. 14RQCh. 33 - Prob. 15RQCh. 33 - When a repulsion-start induction-run motor reaches...Ch. 33 - Prob. 17RQCh. 33 - What causes the magnetic field to rotate in a...Ch. 33 - How can the direction of rotation of a shaded-pole...Ch. 33 - Prob. 20RQCh. 33 - Prob. 21RQCh. 33 - Prob. 22RQCh. 33 - Prob. 23RQCh. 33 - Prob. 24RQCh. 33 - What is the principle of operation of a stepping...Ch. 33 - What does the term bifilar mean?Ch. 33 - Prob. 27RQCh. 33 - When a stepping motor is connected to AC power,...Ch. 33 - What is the synchronous speed of an eight-pole...Ch. 33 - How can the holding torque of a stepping motor be...Ch. 33 - Why is the AC series motor often referred to as a...Ch. 33 - Prob. 32RQCh. 33 - How is the direction of rotation of the universal...Ch. 33 - Prob. 34RQCh. 33 - Prob. 35RQCh. 33 - Prob. 36RQCh. 33 - Prob. 1PA
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