Please answer question 2 rlescKlabcaps lockshift1Question 1. A 240-V, 40-A, PM de generator is rated at a speed of 2000 rpm. The armature windingresistance is 0.4 ohms. The rotational loss is 10% of the power developed by the generator at full load. Ifthe generator is operating in the linear range, determine (a) the no-load voltage, (b) the voltage regulation,and (c) the applied torque.17Question 2. A 120-V shunt motor takes 4 A when it operates at its no-load speed of 1200 rpm. Itsarmature winding resistance is 0.8 ohms and the shunt-field resistance is 60 ohms. (a) Determine therotational loss, and (b) If the back emf under full load (Ea) is 105 V, determine the speed of the machineunder full load.7home47end

1. a. No-Load Voltage (Ea)Ea=V+IaRaWhereEa = No Load Voltage/Induced EMFV = Terminal VoltageIa =…

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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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The armature reaction occurs when a separately excited generator supplies rated load: Is always present Is always absent May be sometimes present None of the above
A 4 pole, lap wound d.c. generators has 42 coils with & turns per coils.It is driven at 1120 r.p.m. If useful flux per pole is 21 mWb, calculate the generated e.m.f. Find the speed at which it is to be driven to generate the same e.m.f.as calculated above, with wave wound armature.
The terminal voltage of a 150 kW series generator is 600 V at rated load. The armature resistance is 0.06 ohms and the series field resistance is 0.04 ohms. Find generated emf.
A short shunt compound DC generator supplies a load of 10A at a voltage of 10 volts. If the resistances of Armature, shunt field and series field windings are 0.01 ohm, 1 ohm and 0.00 ohm respectively. c) write down the factors to improve the generated voltage. Generated Voltage is 10.2 V
In a separately excited generator supplying rated load the armature reaction. is always present is always absent O none of these may be sometimes present
An 8- pole dc generator has 500 armature conducters and a useful flux of 0.05 Wb. A. What will be the emf generated, if it is lap- connected and runs at 1200 rpm? B. What must be the speed at which it is to be driven to produce the same emf if it is wave wound.
1.Two identical shunt generators running in parallel, each with armature resistance of 0.02 ohms and field resistance of 50 ohms. The combined load current is 5000A. The field are so excited that the generated voltages of one machine is 610V and the other is 600V. The terminal voltage of this parallel combination will be. www Ish1 Rh1 a.350-360 V b.450-460 V c. 550-560V Rat www az G₂ Raz 5000 A Ish2
7 A three-phase, 60-cycle, 32-pole synchronous generator has a sinusoidally distributed air-gap flux of 0.025 weber/pole. The armature core has 324 slots. The armature winding is Y-connected. There are two coil sides per slot and two turns per coil. The coil pitch is 9 slots. Find the generated voltage between the line terminals. Ans. 2,445 V
Fill in the following blanks:1. Lap winding is suitable for ……. Voltage, …… current d.c. generators.2. The critical resistance of the d.c. generator is the resistance of ……. .
A 4 pole generator with wave wound armature has 54 slots each having 20 conductors. The flux per pole is 0.01 Wb. ) At what speed must the armature rotate to give an induced EMF of 225V is, (11) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed is, search
Q3/ ( a) A d.c. series generator has armature resistance is 0.5 ohm and series field resistance is 0.03 ohm. It drives a load of 50 A. If it has 6 turns/coil and total 540 coils on the armature and is driven at 1500 r.p.m. Calculate the terminal voltage at the load. Assume 4 poles, lap type winding, flux per pole as 2 mWb and total brush drop as 2 V. (b)/Explain briefly construction of D.C. machine and What are the functions of a Yoke in DC machines? Explain.
Q-4 100 MVA, 50 Hz alternator is operating at rated speed. The H constant of the machine is 5 MJMVA. The load suddenly increases by 50 MW. Due to delay in governor action, there is a delay of 0.5 sec in opening of steam value. The frequency deviation in percentage is

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