Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 29, Problem 7RQ
To determine
The type of field winding which is made with many turns of small wire
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In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance.
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2
B
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O a. Both
O b. Progressive
OC. Neither
O d. Retro-progressive
B
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Chapter 29 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 29 - What is a generator?Ch. 29 - Prob. 2RQCh. 29 - Prob. 3RQCh. 29 - Prob. 4RQCh. 29 - What are interpoles, and what is their purpose?Ch. 29 - How are interpoles connected in relation to the...Ch. 29 - Prob. 7RQCh. 29 - How is the series field connected in relation to...Ch. 29 - How is the shunt field connected in relation to...Ch. 29 - What is armature reaction?
Ch. 29 - What is armature reaction proportional to?Ch. 29 - What are eddy currents?Ch. 29 - What condition characterizes overcompounding?Ch. 29 - What is the function of the shunt field rheostat?Ch. 29 - Explain the difference between cumulative- and...Ch. 29 - Explain the difference between cumulative- and...Ch. 29 - What three factors determine the amount of output...Ch. 29 - What is the voltage regulation of a DC generator...Ch. 29 - Prob. 19RQCh. 29 - Prob. 20RQCh. 29 - You are working as an electrician in a large steel...
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- Shunt field winding is thin wire of many turns. True or Falsearrow_forwardWhat are compensating windings and what function do they serve? Explain how they work and why they are connected in series with the armature.arrow_forward3-5. A three-phase, A-connected, six-pole winding is installed in 36 slots on a stator. There are 150 turns of wire in each slot of the windings. All coils in cach phase are connected in series. The flux per pole in the machine is 0.060 Wb, and the speed of rolation of the magnetic field is 1000 r/min. (a) What is the frequency of the voltage produced in this winding? (b) What are the resulting phase and terminal voltages of this stator? 3-6. Athree-phase, Y-connected, 60 Hz, two-pole synchronous machine has a stator with 5000 rurns of wire per phase. What rotor flux would be required to produce a termi- nal (line-to-line) voltage of 13.2 kV? 3-7. Modify the MATLAB in Example 3–1 by swapping the currents flowing in any twoarrow_forward
- (ii) What are compensating windings and what function do they serve? Explain how they work and why they are connected in series with the armature.arrow_forwardIn a 4 pole lap wound DC Machine has 720 conductors, the number of parallel paths isarrow_forwardLap windings are used in d.c machine designed for what type of application? * O Low voltage low torque d-c motor O High voltage high torque d-c motor Low voltage high current d-c generator High voltage low current d-c generatorarrow_forward
- For 6 polar D.C machine armature has 36 number of slots and the type of winding is a double layer simplex lap winding. a. How many coils are present? b. What is the coil span in terms of number of slots? c. If each coil has 4 turns, then what is the total number of armature conductors presents? d. How many parallel paths will be their in the armature? e. Altogether how many brushes will be their?arrow_forward3-4. A three-phase, Y-connected, four-pole winding is installed in 24 slots on a stator. There are 40 turns of wire in each slot of the windings. All coils in cach phase are connected in series. The flux per pole in the machine is 0.060 Wb, and the speed of rotation of the magnetic field is 1800 r/min. (a) What is the frequency of the voltage produced in this winding? (b) What are the resulting phase and terminal voltages of this stator? 3-5. A three-phase, A-connected, six-pole winding is installed in 36 slots on a stator. There are 150 turns of wire in each slot of the windings. All coils in each phase are connected in series. The flux per pole in the machine is 0.060 Wb, and the speed of rolation of the magnetic fieid is 1000 r/min. (a) What is the frequency of the voltage produced in this winding? (b) What are the resulting phase and terminal voltages of this sStator?arrow_forwardThis course Is this armature winding a progressive or a retro-progressive winding? 3. d х у a Select one: O a. Both O b. Progressive OC. Neither O d. Retro-progressivearrow_forward
- For a four pole, 16 slot armature with two coil-side/slot having wave connected progressive winding has single turn coils has simplex winding. The number of current paths is?arrow_forwardA flux of 0.5 Weber flows through a core with a total reluctance of 60,000 ampere-turns/Weber. How much current (in amperes) should be flowing through a winding with 4,000 turns to produce the given amount of flux?arrow_forwardfill inthe blank : field winding has large numberofturns of thin copper wire. a. Shunt b. Series c. Compound d. separately excitedarrow_forward
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