Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 39, Problem 9SQ
To determine
State at what range of power factor the high-speed wound rotor motors can operate.
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Name three factors that determine the amount of voltage induced in the rotor of a wound-rotor motor.
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Which of the following types of DC motors are typically controlled by a DC drive?
Chose all that apply
Group of answer choices
brush-less DC
shunt
series
permanent magnet
compound
Chapter 39 Solutions
Electric Motor Control
Ch. 39 - Prob. 1SQCh. 39 - What is the effect of the starting winding of the...Ch. 39 - What are typical applications of synchronous...Ch. 39 - Prob. 4SQCh. 39 - A loaded synchronous motor cannot operate...Ch. 39 - Why must a discharge resistor be connected in the...Ch. 39 - Depending on their power factor ratings, what is...Ch. 39 - At what power factor do incandescent lights...Ch. 39 - Prob. 9SQCh. 39 - The speed of a synchronous motor is fixed by the...
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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
- What are the three basic types of three-phase motors?arrow_forwardThree Phase Induction Motor Question 1: A wound rotor induction motor runs with a slip of 0.05 when developing full load torque. Its rotor resistance is 0.45 0 per phase. If an external resistance of 0.50 per phase is connected across the slip rings, what is the slip for full torque?arrow_forward- In speed control of dc shunt motor, the armature voltage drop has the great effect on speedarrow_forward
- What is the function of starter for medium and large size Induction Motors?arrow_forwardAn induction motor develops rated torque with a slip of 3.5% when the rotor is cold. If the rotor resistance is 20% higher when the motor is at normal running temperature, at what slip it will develop rated torque?arrow_forwardWhat is energy efficient induction motor and conventional indcuction motor?arrow_forward
- A 4 pole, 500V shunt motor has 720 wave connected conductors on its armature. The full load armature current is 60A and flux per pole is 0.03Wb. The armature resistance is 0.2Ω and contact drop per brush is 1V. What is the back emf? What is the developed torque?arrow_forwardCapacitor-run motor has better power factor while running but it has low starting torque, why?arrow_forwardA 120 V shunt motor has an armature equivalent of 0.5 ohm and a field resistance of 60 ohm. At full load, the motor takes 10 A and the speed is 1000 rpm. At what speed must this motor maybe driven as a generator to deliver 10 A to an external load at 120 V?arrow_forward
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