field In a 15-hp, 240-V, 1200-rpm shunt DC motor, the armature resistance is 0.400 and resistance is 100 n. The magnetization curve of the motor is assumed to be linear in the operating region. Neglect mechanical losses and armature reaction. a) If the motor is running at 1200RPM at no-load and R 100 ohms, what will be the motor EMF?) b) If an additional adjustable resistance is inserted in series with the shunt field, and it can be varied between zero and 100 , find the possible range for no-load speed with the adjustable resistance connected. c) With the adjustable resistance in series with the shunt field set to zero, what is the speed regulation of the motor if its net output is 15HP? Note: the speed regulation is given by : Speed Regulation = (No Load Speed - Full Load Speed)/(No Load Speed)

field In a 15-hp, 240-V, 1200-rpm shunt DC motor, the armature resistance is 0.400 and resistance is 100 n. The magnetization curve of the motor is assumed to be linear in the operating region. Neglect mechanical losses and armature reaction. a) If the motor is running at 1200RPM at no-load and R 100 ohms, what will be the motor EMF?) b) If an additional adjustable resistance is inserted in series with the shunt field, and it can be varied between zero and 100 , find the possible range for no-load speed with the adjustable resistance connected. c) With the adjustable resistance in series with the shunt field set to zero, what is the speed regulation of the motor if its net output is 15HP? Note: the speed regulation is given by : Speed Regulation = (No Load Speed - Full Load Speed)/(No Load Speed)

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: A 220 V dc shunt motor draws a current of 50 A from the supply and runs at 900 rpm. Its armature and…

Q: Does a DC motor have to be turning in order for it to develop torque? a) yes b) no Most DC motor…

A: The Dc motor is electrical machinery that converts electrical and mechanical energy

Q: 440-V shunt motor has armature resistance of 0.02 ohm and field resistance of 500 ohms. Determine…

A: In this question we will find find back emf....

Q: 3. A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per…

A: Here DC shunt motor is given and we have to find developed torque and useful torque

Q: 6. A 10 kW, 250 V Shunt motor has an armature resistance of O.5 ohm and a field resistance of 200…

A: The solution is given below

Q: A 250 V dc shunt motor has an armature resistance of 0.2 Ω and a field resistance of 100 Ω. When the…

Q: A 220 V, 15 kW, 850 r.p.m. shunt motor draws 72.2 A when operating at rated condition. The…

A: I have written this solution as handwritten solution. Hope you find the perfect solution.

Q: аc sn Int motor runs om a 400 V supply w mature current of 25 eed at which it will r pply when…

Q: shunt motor with an armature winding resistance of 0.01 Ohm and a field winding resistance of 25 Ohm…

A: DC shunt motor Armature winding resistance of 0.01 Ohm field winding resistance of 25 Ohm DC 50 V…

Q: A 250 V shunt motor, having an armature resistance of 0.2 ohm draws from the mains a current of 50…

A: Given V=250 V armature resistance =Ra =0.2 Ω at half full load, armature current =Ia1 =50 A Initial…

Q: A DC generator has terminal voltage of 250 V and an induced voltage of 262 V when the generator is…

Q: A 250 V, 8-poles lap wound D.C. shunt motor has an armatre resistance of 0.5 N and shunt field…

Q: What is value of total loss in armature resistance and field resistance.

A: Given values are - Vt=240VoltIt=15AArmature resistanceRa=0.5OhmField resistanceRf=80Ohm Given motor…

Q: .A 10 kW, 250 V Shunt motor has an armature resistance of 0.5 ohm and a field resistance of 200 ohm.…

Q: 5. A 220-volt shunt motor draws 64-Amp and runs at 500 rpm. Armature resistance, 0.25- ohm, field…

A: In this question, We need to determine the speed of the motor when external resistance is added to…

Q: B. A 180 V, dc shunt motor drives a constant-torque load at a speed of 1600 rev/min. The armature…

A: Given dc shunt motor Constant torque load at speed 1600 rpm Armature resistance Ra=2 ohm Field…

Q: A 230V DC series motor operates at its full load current and speed of 22A and 750 revolutions per…

A: Types of DC Motor Seperetely excited motor Series Motor Shunt Motor Compound Motor Differential…

Q: A 250V series motor runs at 500 rpm at rated load current of 75 A. The armature circuit has a…

A: It is given that: V=250 VN1=500 rpmIL1=Ia1=75 ARa+Rse=0.2 Ωϕ α Ia

Q: Q9) Specifications for a PM DC motor are as follows: electrical constant (KEMF) = 0.014V/rpm • and…

A: Given Data:A PMDC motor with,Electrical constant Armature resistance Input DC voltage To…

Q: A shunt DC motor is rated at 100 hp at a speed of 1800 rpm. This motor has an efficiency of 97%…

A: Given data, Rated power, P0=100 hp=74600 Wη=97% Input power is given as, Pin=P0η=746000.97=76907.22…

Q: О 1220 гpm

Q: (B) Design a starting circuit for the DC motor that will limit maximum starting current to 150% of…

A: Starting circuit of the DC motor is designed as shown below

Q: Q5. B. A 4-pole 250-V, d.cl series motor has a wave-wound armature with 496 conductors. Calculate:…

A: This question belongs to electrical machine . It is based on d.c. series motor . This problem is…

Q: Q-3) The current drawn by a 120 V dc motor with back e.m.f of 110 V and armature resistance of 0.4…

A: Given- 120 V dc motor, Back emf =110 V, Armature resistance =0.4 ohm, To Find- The current.

Q: A permanent magnet DC mitor has an armature resistance 1.4 52. When it is supplied by 75-V DC…

Q: At full load, when the DC shunt motor is supplied by 110 V dc source, the armature current is 20 A…

Q: A 4-pole, DC shunt motor has a flux per pole of 0.04 Wb and the armature is lap-wound with 720…

Q: A separately-excited DC motor has lap-wound armature with 100 slots and 2 turns per coil. It is…

Q: hine. OMod pup anh b) In rotating machines, how would the voltages be generated in windings or…

A: Since you have posted the multiple questions so we are supposed to answer the 1st one.

Concept explainers

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.

Question

In a 15-hp, 240-V, 1200-rpm shunt DC motor, the armature resistance is 0.40 0 and the field
resistance is 100 n. The magnetization curve of the motor is assumed to be linear in the operating
region. Neglect mechanical losses and armature reaction.
a) If the motor is running at 1200RPM at no-load and R 100 ohms, what will be the motor
EMF?)
b) If an additional adjustable resistance is inserted in series with the shunt field, and it can be
varied between zero and 100 , find the possible range for no-load speed with the
adjustable resistance connected.
c) With the adjustable resistance in series with the shunt field set to zero, what is the speed
regulation of the motor if its net output is 15HP? Note: the speed regulation is given by :
Speed Regulation = (No Load Speed - Full Load Speed)/(No Load Speed)

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps with 2 images

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

A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, R. is 208 n. The resistance of the rotor, R,, is 4.90 1. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.46 A from the line. Friction losses amount to 45.0 W Part C Compute the emf E. • View Available Hint(s) Tematates Symbols undo redo Tese keyboard shortcuts Help V Submit Part D Compute the rate of development of thermal energy in the field windings. Express your answer in watts. > View Available Hint(s) Templates Symbols undo redo Teset keyboard shortcuts Help Pan,windings = Figure W K 1 of 1 Submit Part E Compute the rate Pin.rotor of development of thermal energy in the rotor. R ER, Express your answer in watts. > View Available Hint(s) Templates Symbols undo redo teset keyboard shortcuts help Pinrotor=
A 200 V D.C. shunt motor takes 20 A at rated voltage and runs at 1000 r.p.m. Itsarmature resistance is 0.1 ohm. Calculate the value of additional resistance requiredin the armature circuit to reduced the speed to 800 r.p.m when the load torque isindependent of the speed.Ignore the field current. (Ans.1.98 ohm)
(c) What are the principle characteristics of DC series motor and DC compound motor, and what are its uses?
The armature resistance of a shunt motor fed from a 220 Volt DC source is 5 ohms and the resistance of the excitation winding is R ohm and it rotates stably. Then, a resistance of R ohm is added to the excitation circuit (a resistor with the same value as the winding resistance) to control the speed. How many RPM is the motor in the last state in steady state.Mechanical losses will be neglected, motor magnetically linear, no saturation, temperature change will be neglected.Armature current = Ia = 3 ALoad torque=Tload= 8 Nma) 143 rpmb) 734 rpmc) 1361 rpm d) 77 rpm e) 1333 rpm
I need the answer as soon as possible
Q4) A 220 V d.c. shunt motor has an armature resistance of 0.5 ohm, and runs at 850 rpm., When taking a full-load current of 32 A, the shunt field resistance is 110 ohms. Calculate the speed at which the motor runs, if (i) 1.5 ohm resister were introduced in series with the armature, (ii) 300 ohms resister were connected in series with the field winding, and load torque remaining the same throughout. Assume that field is proportional to field current. ?
Explain how to drive DC Motors! (there should be a description about the PWM, duty-cycle, and transistor)
A 4 pole10V, DC shunt motor operates on a load current 10A, having wave connected armature with 200 conductors. The flux per Pole is 25 m Wb. Resistance of shunt field winding is 1 ohm and resistance of the armature is 0.15 ohm. a) what would be the back emf?
The current drawn by the 230 V DC motor of armature resistance 0.5 ohm and back emf 200 V is ?
A 230-V dc shunt motor takes a current of 5A at no-load. The resistance of armature and field circuits are 0.50 ohm and 230 ohm, respectively . If the maximum efficiency occurs at full load current, what is the value of this current? A 14 hp, 240 v shunt motor draws an armature current of 50 A at full-load. The armature resistance including brushes is 0.25 ohm. Calculate the total resistance of a starting box which wound permit this motor to develop a starting torque equal to twice that at full load.
A 230 V DC Shunt motor runs at 700 r.p.m. and takes armature current of 40 A. Find resistance to be added to the field circult to increase speed to 1200 r.p.m. at an armature current of 60 A. Assume flux proportional to field current. Armature resistance = 0.12 n and field winding resistance is 115h
a 220 V dc shunt motor has armature resistance 0.23 ohm, on load it takes armature current 40 A and turnes at 720 rpm, if the flux of motor is reduced by 10% without changing the load torque . Find the new speed of the motor.