If there are four parallel paths in the armaturewinding, then it is a.winding with.polesIn the above if each parallel path has rp Q thenRa =...The number of brushes in the above caseIf drop in one brush is one volt, there are 4brushes, 2 or 4 volt brush drop will be consideredin the calculations?State Lenz's law.Energy can be created and destroyed? True/FalseThe total losses in the armature can be dividedinto . .losses and . .losses

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Answered: If there are four parallel paths in the…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Similar questions

A d.c. shunt machine has armature and field resistances of 0.025 Ω and 80 Ω respectively. When connected to constant 400-V bus-bars and driven as a generator at 450 r.p.m., it delivers 120 kW. Calculate its speed when running as a motor and absorbing 120 kW from the same bus-bars
What is Commutation in DC Machines? What are the methods you will suggest to improve the commutation problems? -Please don't write on paper. - Reference must be added. - Diagram should draw by Hand and attach in the word file.
A solenoid relay is operated from a DC supply. The gap forces may be taken as parallel and the permeability of the ferromagnetic paths as very high. The air gap length is 2mm. Determine the air gap area in cm^2 which produces an acting force upon the armature of 0.3997N ? I need the answer as soon as possible
N K © M =] v : @& docs.google.com/forms/d/¢ 2 Add file Q 1/ B) What is the work of Commutator . * &2, Add file Q 2) The following information is given for a 300-kW, 600-V, long-shunt compound generator : Shunt field resistance = 75 Q, armature resistance including brush resistance = 0.03 Q, commutating field winding resistance = 0.011Q, series field resistance = 0.012 Q, diverter resistance = 0.036 Q. When the machine is delivering full load, calculate the voltage and power generated by the armature * 2 Add file Q 3) A four pole aenerator havina - >
The armature and field resistances of a series machine are 0.2 ohm and 0.3 ohms respectively. While running as a generator, the generated emf is 250V at 1200rpm. If the machine is run as motor, it takes 4A at220V. At a certain load, the motor takes 30A at 220V. However, on load, the armature reaction weakens the field by 4%. Find the motor speed at this load.
Cutting forces should be kept constant during machining operations to prevent changesin spindle speeds or work position. Such changes would deteriorate the accuracy of thework’s dimensions. A control system is proposed to control the cutting force. The plantis difficult to model, since the factors that affect cutting force are time varying and noteasily predicted. However, assuming the simplified force control model shown inFigure (ii) Determine the range K to keep the system stable using the Routh-Hurwitzcriterion.
1-The power output of the three phase machine is greater than the single phase machine. (TRUE/FALSE) 2-In thermocouple, when both the junctions are at the same temperature, the potential difference developed across both junction is zero. (TRUE/FALSE) 3-Due to decreased armature m.m.f., the armature reaction during load condition will increase and hence field flux will be distorted. (TRUE/FALSE) 4-While applying voltage in CRO, the grid is positive with respect to cathode. (TRUE/FALSE) 5-Losses in transformers are generally low and thus efficiency is high. (TRUE/FALSE)
Explain how Kirchhoff's Current Law serves as the founding principle of a grounding strap.
Find the total external armature current of a dc machine which has thefollowing specifications: 120 armature slots; 6 conductor per slot; 9300lines per cm2 flux density; armature diameter of 28 inch ; 14 incharmature axial length ; 4 armature parallel path ; the pole span 72 % ofthe armature surface and the torque developed by the armature 1500 lb-ft.[Ans. Ia = 133.6 A]
The armature of an 8 -pole dcmachine has 72 slots, and itsdiameter is48 cm. Find the polepitch in and meters, and mechanicaldegrees, and mechanical radians, and electrical degrees, and electricalradians, and number of slots.Also find and the electrical anglecorresponding to a mechanicalangle of 350, and the mechanical angle corresponding to an electrical angle of 350, and (i) thedistances along the armature surface corresponding to the angles in g and h .
Find the total external armature current of a dc machine which has thefollowing specifications: 120 armature slots; 6 conductor per slot; 9300lines per cm2 flux density; armature diameter of 28 inch ; 14 incharmature axial length ; 4 armature parallel path ; the pole span 72 % ofthe armature surface and the torque developed by the armature 1500 lb-ft. (ANS: 133.6 A) PLEASE ANSWER IMMEDIATELY
With a labelled diagram of any DC machine Discuss it parts

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