Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 33, Problem 35RQ
To determine
How to set the neutral plane position using the series field.
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Q9 / What are the function of brushes , pole and
commutator in DC machine
The poles, q-axes, and brushes are-3
of the armature winding
a) Part O
b) not part O
c) included O
Topic: TOPIC: Thyristors and Phase Control
Study the thyristor's IV Characteristic Curve. Then try and explain it to your younger self.
Why is the maximum firing angle of the AC resistance trigger circuit limited to 90 degrees?
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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- Number of coil windings 300; slit width 12 mm How can I get the calibration factor by using ampere's law? Plz explain in detailarrow_forward14/. The purpose of brushes in a dc machine is__________. to change ac to dc signal to remove the losses in machine to collect voltage from windings avoid spark for currentarrow_forwardIn DC generators brushes are used for O Collecting Current O Collecting eddy current loss O reduce eddy current loss O convert ac armaturê current in to dcarrow_forward
- Speed control of a 140 V, 1.68 kW DC motor single phase thyristor full wave AC-DC It is made by the converter. AA supply voltage 220 V (rms) Is 50. In the converter It is assumed that there is no loss. The armature resistance of the DC motor is = 0.417 Q. Very a large inductance is connected in series with the motor. The motor voltage constant is = 0.0964 V/rpm. The motor can be considered as a permanent magnet DC. According to this, a) Draw the driver (converter-motor) power circuit. b) Calculate the nominal current of the motor. c) Supply voltage, supply current, converter output voltage for ignition angle a = 30 ° and Draw the waveforms for the converter output current. d) = 950 rpm and for nominal current, d1) The firing angle of the converter, d2) Effective value of supply and thyristor current, d3) Supply power factor, calculate.arrow_forwardI need the answer quicklyarrow_forwardUntitled Section Jalis 6 In d.c. generators armature reaction is produced by field current O armature current commutating winding current none of the mentioned compensating winding current *.The use of d.c. generators eliminated the use of rectifiers and ac supplies True False Oarrow_forward
- A DC shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field resistances are 0.01 2 and 44N respectively. The stray losses are 375 W. What is percentage efficiency of the DC generatorarrow_forwardWhat is the differential compound generator and what is the principle of work, what are its advantages and disadvantages, and what is its drawing and imagearrow_forwardThe armature of a shunt generator has 0.08-ohm effective resistance. Each brush has an effective resistance of 0.02 ohm. The terminal voltage is 120 V while the current is 60 A. What is its efficiency?arrow_forward
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