The armature of a 4-pole, 128 slots shunt generator is lap wound with four conductors per slot. The flux per pole is 50mWb. The armature and shunt field resistances are 0.04 ohm and 50 ohms, respectively. The machine supplies 400A at a terminal voltage of 250 V.

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Q: 188. A DC shunt generator supplies 450 A at 230 V. The resistances of shunt field and armature are…

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Q: If the armature current in a dc machine is 400A, what should be the current in each winding if the…

A: Given Armature current = 400 Amp, No.of Poles = 10 To calculate current in each path

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Q: Q3. A 230 V dc shunt Motor runs at 800rpm and takes armature current of 50A. Find the resistance to…

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Q: A four poles d.c Motor with a progressive simplex wave winding, 14 slots , Draw developed diagram…

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Q: 10. Two identical 5 kW, 220 V, 24 A dc shunt machines are to be used as the gene- rator and motor in…

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A: As it is given DC motor has simplex lap winding structure with 4 poles and 12 slots. In simplex…

Q: Q2] Fill in the blank (9 Marks) 1- The critical resistance of the D.C. generator is the resistance…

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Q: Q1. A shunt generator has an induced voltage on open circuit of 127 V, when the machine is loaded,…

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Q: (a) What is the rated torque given conditions: a DC machine with no-load speed 6800 rpm, rated…

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Q: 2.A. When machine losses are determined by the retardation method, it is necessary to know the…

A: 1) Retardation test is also known as running down test. This is efficient method to find out stray…

Q: 174. The EMF induced in the armature of a shunt generator is 500 V. The armature resistance is 0.22…

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Q: 4-The critical resistance is less than armature res 5-As the load is increased, the speed of a d.c.…

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Q: Answer by true or false False True In dc machine, each pole composed of three parts which are pole…

A: Field System of DC machine:  -The function of the field system is to produce uniform magnetic field…

Q: what are the advantages of speed control by flux control method? *

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Q: Where is field winding mounted in a DC machine? a) Stator b) Rotor c) Absent d) Anywhere on stator…

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Q: How does change in resistance affect the speed of a DC motor? A. Increasing the armature resistance…

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Q: The electromagnetic torque in non sallent pole machines depends on, Oa peak value of stator and…

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Q: Asap, select the best answer.  The application of a lap winding dc machine is in: A.  low voltage,…

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Q: Q3/ A 230 V DC shunt machine on no-load has a speed of 900 rpm and a supply current of 2.5 A. The…

A: Solution- Given,N0 = 900 rpmIL0 = 2.5 ARsh = 230 ohmRa = 0.3 ohmV.D per brush = 1 VVt = 230V   Pi/p…

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Q: QUESTION 3: A- Find the active and the reactive power and the type of a 3-ph machine under the…

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Q: 015/ExPlain in bries The constreeetion of a Dc machine.

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Q: generator has a full A, resistanc $2 and con ses of 500 W. If F.L. efficiency is 88%, find armature…

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Q: c. Did the armature voltage reverse its polarity? O Yes O No

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Q: 174. The EMF induced in the armature of a shunt generator is 500 V. The armature resistance is 0.22…

A: A shunt generator with, Induced emf in the armature, E=500 V. The armature resistance, Ra=0.2 Ω. The…

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.