EBK ELECTRIC MOTOR CONTROL
10th Edition
ISBN: 9780100784598
Author: Herman
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 28, Problem 5SQ
To determine
What percentage of the normal locked rotor current draws by a motor when starting on one winding.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Why should power not be applied to the stator of a wound rotor motor if there is no resistance connected to the rotor circuit
The factors effecting the speed of
dc motor are
The flux p and the voltage across the
armature
the voltage across the armature and the
applied voltage V
The applied voltage V, flux p and the
voltage across the armature
none of the aboye
Indicate whether the following
statement are true or false *
True
False
The distance
between the
beginnings of
each cascaded
two coils is
called
commutator
Pitch
In this problem, how could I know what will be the direction must the motor would rotate?
Chapter 28 Solutions
EBK ELECTRIC MOTOR CONTROL
Ch. 28 - Prob. 1SQCh. 28 - Which voltage may be applied to a 230/460-volt...Ch. 28 - If the nameplate of a dual-voltage motor connected...Ch. 28 - If a timing relay fails to cut in the run starter,...Ch. 28 - Prob. 5SQCh. 28 - Prob. 6SQCh. 28 - Who determines the compliance of an installation...Ch. 28 - Prob. 8SQCh. 28 - Refer to the circuit shown in Figure 284. When the...Ch. 28 - Refer to the circuit shown in Figure 283. It is...
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
- When the voltage is reduced to start a motor, what happens to the a. torque? b. current?arrow_forwardHow would the shaft speed of the motor change if a negative torque is applied while motor is spinning in negative direction? Don't copy pastearrow_forwardRotor of the electrical machine, having 8 poles, is turned on 360 electrical degrees. How much is that in mechanical degrees?arrow_forward
- Why might the rotor of an induction motor become very hot if it was switched on and off repeatedly, even though it was not connected to any mechanical load?arrow_forwardSelect the best answer for each of the following. The purpose of overload protection on a motor is to protect the a. motor from sustained overcurrents. b. wire from high currents. c. motor from sustained overvoltage. d. motor from short circuits.arrow_forwardIn what position do ball-bearing motors function?arrow_forward
- This term refers to the number of times a wire revolves around the armature core. turn revolution This is the rotating part of the gener or motor. rotor stator Which of these is NOT a part of a DC generator? stator slip rings commutator brushesarrow_forwardWhich part of the D.C motor is used to change the direction of current after a half cycle? f O a. Loop or coil ion O b. Slip rings O. Split rings O d. Magnetic polesarrow_forwardA 400V, 60HZ, 6-pole wye connected , 30 induction motor draws 75KW with a line current of 100A. The core loss is 2KW, Friction and Windage loss is 1.2KW. The stator resistance between two terminals is 0.352. What is the efficiency if the motor runs at a slip of 2.5%?arrow_forward
- Question: Which motor can correct its speed when unexpected load is happen Servo Motor Stepper Motor Series Motor Shunt Motorarrow_forwardIn any given motor to what two factors is the torque proportional?arrow_forwardA 220 V shunt motor has an armature resistance of 0.5 ohm and takes a current of 40 A on full-loads. By how much must the main flux be reduced to raise the speed by 50% if the developed torque increased by 10 %arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning