Problem # 1: A four-pole DC machine has a wave winding of 300 turns. The flux per pole is 0.025 Wb. The DC machine rotates at 1000 rpm. a) Determine the machine constant, b) Determine the generated voltage, c) Determine the kW rating if the rated current through the turn is 25 A. Problem # 2: The following information is taken from the nameplate of a separately-excited dc generator. Armature: 120 kW, 600 V, 0.15 Q. Field: 100 V, 6.0 A At its rated speed of 3600 rpm the no-load torque is measured at 16 Nm. Ignore armature reaction and magnetic saturation. a) For rated load conditions determine: i) Rated Shaft Horsepower ii) Rated Efficiency iii) Load Impedance b) Determine the terminal voltage, kW output and the efficiency if the field current is reduced to 4.5 A, and the speed is reduced to 3000 rpm, causing the rotational losses to become 4 kW. The load impedance is unchanged.

Problem # 1: A four-pole DC machine has a wave winding of 300 turns. The flux per pole is 0.025 Wb. The DC machine rotates at 1000 rpm. a) Determine the machine constant, b) Determine the generated voltage, c) Determine the kW rating if the rated current through the turn is 25 A. Problem # 2: The following information is taken from the nameplate of a separately-excited dc generator. Armature: 120 kW, 600 V, 0.15 Q. Field: 100 V, 6.0 A At its rated speed of 3600 rpm the no-load torque is measured at 16 Nm. Ignore armature reaction and magnetic saturation. a) For rated load conditions determine: i) Rated Shaft Horsepower ii) Rated Efficiency iii) Load Impedance b) Determine the terminal voltage, kW output and the efficiency if the field current is reduced to 4.5 A, and the speed is reduced to 3000 rpm, causing the rotational losses to become 4 kW. The load impedance is unchanged.

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...

See similar textbooks

Related questions

Q: Describe the similarities in the construction of a DC motor and a DC generator.

A: From a mechanical standpoint, a DC motor and a DC generator are quite similar, but from a technical…

Q: Q2/ A d.c. series motor is running whith a speed of 800 r.p.m. while taking a current of 20 A from…

A: A DC series motor , field winding series with the armature winding. If Speed N=800rpm drawn…

Q: 4. A three-phase A-connected six-pole winding is installed in 36 slots on a stator. There are 150…

A: Introduction A three-phase delta-connected system is a type of electrical power distribution…

Q: An 6 pole, wave connected armature has 580 conductors and its generated e.m.f is 125 V. If the…

A: To solve above problem, one should know the EMF equation of DC generator, which is given by: E…

Q: Q3. A 4-pole machine has an armature with 90 slots and 8 conductors per slot, the flux per pole is…

A: The total number of the conductor in the armature is determined as: Z=90 slots8 conductors per…

Q: A dc generator is run at 500 rpm. The eddy current losses and hysteresis losses are found to be 100…

Q: Write an article describing the DC Generator. Provide applications of DC generator. Provide the…

Q: A 3-phase, 50 Hz, Delta-connected, AC generator has a stator with 60 slots, each slot contains 12…

A: In this question we will find induced line and phase voltage of delta connected generator...

Q: A 3-phase, 50 Hz, Y-connected, AC generator has a stator with 72 slots, each slot contains 10…

Q: A 3-phase, 60 Hz, Delta-connected, AC generator has a stator with 60 slots, each slot contains 12…

Q: 1.78 The induced emf of a dc machine running at 750 rpm is 220 V. The percentage increase in field…

A: we need to find out percentage change in flux.

Q: 3.17. A 200-turn coil is rotating at a speed of 3600 rpm in a 4-pole generator. The flux per pole is…

A: The given question is solved in step by step process.Explanation:

Q: An 8-pole lap-connected armature has 40 slots with 12 conductors per slot generating a voltage of…

A: The voltage supplied to the motor by an external power source is known as EMF or electromotive…

Q: The hysteresis loop occurs because: Select one: a. The machine is full-loaded b. some eddy current…

A: consider the given circuit;

Q: The armature of a shunt generator has 0.08-ohm effective resistance. Each brush has an effective…

A: In a shunt generator is having, Armature resistance, Ra=0.08 Ω. Resistance of each brush, Rb=0.02 Ω…

Q: A lap connected 6 pole DC generator has an armature conductors of 500 and is driven at 600 rpm. If…

A: The solution for the given DC generator is solved below and attached.

Q: .A 230 V dc series motor has Ra=0.22, Rf=0.12. The motor draw 40A at rated speed and 1000 RPM. Find…

Q: Determine the power output of a DC armature having 1152 lap connected conductors carrying 150 A and…

Q: A series generator having a combined armature and field resistance of 0.4 ohm us running at 1000 rpm…

Q: AC Machinery Fundamental 1.The simple loop is rotating in a uniform magnetic field shown in the…

A: As per the guidelines of Bartleby we supposed to answer first three subparts of the question for…

Q: 1- In an alternator, the armature reaction influences the magnitude of Wave form of generated…

A: NOTE- “Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: A 6-pole, wave-connected armature has 831 conductors and is driven at 612 RPM. If the flux per pole…

A: We know direct formula for generated emf

Q: A 3-phase, 60 Hz, Y-connected, AC generator has a stator with 60 slots, each slot contains 12…

A: AC generators are used to generate electrical energy. It converts mechanical energy in the shaft to…

Q: prove the formula of generated voltage of dc machine

A: The derivation is as follows.

Q: A long shunt compound generator supplies a load consists of 172 shunt lamps each rated at 48 W, 235…

A: Long shunt compound generator Shunt field winding connected to the after series field winding.…

Q: An 2 pole, wave connected armature has 590 conductors and its generated e.m.f is 110 V. If the…

A: We know there is direct formula for generated emf , from that formula we will calculate flux per…

Q: Question: A 4 Pole DC Generator Is Wounded Lap. It Rotates At 50Orpm To Be Able... A 4 pole DC…

Q: The DC shunt generator with the terminal voltage 300 V, armature drop 7 V and the each brush drop 4…

A: In this we will find emf..

Q: A 3-phase, 6-pole, Y-connected, AC generator has a stator with 48 slots, each slot contains 60…

A: In this question we will find synchronous generator electrical and mechanical frequency in rad per…

Q: DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: AC MACHINES Answer the following questions (A,…

A: Alternator- Alternator is a form of machine which is used to convert mechanical energy into…

Q: 6 pole, wave connected armature has 520 conductors and its generated e.m.f is 125 V. If the machine…

Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

Question

Problem # 1:
A four-pole DC machine has a wave winding of 300
turns. The flux per pole is 0.025 Wb. The DC
machine rotates at 1000 rpm.
a) Determine the machine constant,
b) Determine the generated voltage,
c) Determine the kW rating if the rated current
through the turn is 25 A.
Problem # 2:
The following information is taken from the
nameplate of a separately-excited dc generator.
Armature: 120 kW, 600 V, 0.15 Q.
Field: 100 V, 6.0 A
At its rated speed of 3600 rpm the no-load torque is
measured at 16 Nm. Ignore armature reaction and
magnetic saturation.
a) For rated load conditions determine:
i) Rated Shaft Horsepower
ii) Rated Efficiency
iii) Load Impedance
b) Determine the terminal voltage, kW output and
the efficiency if the field current is reduced to 4.5 A,
and the speed is reduced to 3000 rpm, causing the
rotational losses to become 4 kW. The load
impedance is unchanged.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Kindly solve what is ask with complete solution so that I can understand. I want a handwritten solution. Thank you very much pots!
128. The hysteresis loss of a dc machine is 300 W when the flux per pole is 30 mWb and the machine is driven at 1000 rpm. How much Is the loss If the field is adjusted to produce 50 mWb per pole whlle the speed Is reduced to 900 rpm? A. 420 W B. 510 W C. 450 W D. 500 W
Determine the flux per pole for 6 pole dc machine having 240 wave connected conductors, which generates an open circuit voltage of 500 volt, which is running at 1000 rpm.
Differentiate the two generators shown in Figure 1.6.1-1 and Figure 1.6.1-2. The output voltage can be controlled by the adjustment of the d.c. field Permanent Magnet Field Electro- Magnetic Field Magnetic Field (Flux) Magnetic Field (Flux) IN ADJUSTABLE D.C SUPPLY Shaft Shaft Copper loop Slip-rings and Brushes Çopper loop Slip-rings and Brushes THIS TIME THE MAGNETS ARE STATIONARY, BUT THE COIL IS MOVING! www Output Output Figure 1.6.1-1 Figure 1.6.1-2
A 3-phase, 60 Hz, Y-connected, AC generator has a stator with 72 slots, each slot contains 10 conductors. The conductors of each phase are connected in series. The flux per pole in the machine is 0.04 Wb. The speed of rotation of the magnetic field is 720 RPM. What are the resulting RMS phase voltage and RMS line voltage of this stator? Select one: O a. None O b. V = 1279.5 Volts and VT = 1279.5 Volts O c. V = 1279.5 Volts and VT = 2216.2 Volts O d. V = 1809.5 Volts and V- = 3134.1 Volts O e. V = 2216.2 Volts and VT = 2216.2 Volts Clear my choice
Please quick solution
A 4 pole machine generates 250 volts when operated at 1500 rpm. If the flux per pole is 1.85 x 10°maxwell. The number of armature slots is 45 and the armature winding has two parallel paths. Calculate. a). the total number of armature conductor. b). the number of conductor in each slot c). If the speed of the generator is decrease to 1,350 rpm, what will be the generated voltage if the flux per pole is maintained at the value. d). To what value of flux per pole should the excitation be adjusted if the generated voltage is to remain the same. (Hint: Eav and Eg = lave x ²) ØXP X t
nid%3D11610 This course O d. Flux = 0.9 Wb, Speed = 473 rad/sec Clear my choice In a given DC motor, the output power is 20 HP, and the rotational losses are 1.1 KW. If the motor is operating at 87 % efficiency, find the converted power and the copper losses. Select one: O a. Peony =16 02 KW and Pa = 1.13 KW Ob. P.ry= 14.92 KW and P = 1.35 KW Oc None Od. Por= 1715 KW 3nd Pa-211kw Consider a shunt DC motor with an armature resistance RA -0.125 2 and terminal voltage VT =460V. TIhe motor rated speed is 1000RPM and the rated amature current is 100 A. The total field resistance is 260 Ohms
Kindly solve what is ask with complete solution so that I can understand. I want a handwritten solution. Thank you very much pois!!
Left hand rule may be applied to an AC generator to find out: Select one: a. direction of rotor rotation b. direction of magnetic field c. direction of induced emf d. direction of induced torque
a) A sinewave is having a frequency of 100 Hz and instantaneous value of 100 Volts at 1.4 milli seconds. Find i) The maximum value of sinusoidal voltage waveform and ii) The value of voltage at 1.9 milli seconds. b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=100 Volts, Time period is 10 milli seconds and 0 =30 degrees. Vp = 0 Upload your Answers steps in the "Final Answer Submission" Link provided in the Moodle. a) (i) Maximum value = a) (ii) Value of voltage at 1.9 ms = b) Angular frequency =
Urgent need.