Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 42, Problem 11SQ
To determine
Explain how DC is obtained from a brushless rotor.
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Chapter 42 Solutions
Electric Motor Control
Ch. 42 - What are the two basic methods of automatically...Ch. 42 - What is an out-of-step relay?Ch. 42 - Why is an out-of-step relay used on automatic...Ch. 42 - Under what conditions will the out-of-step relay...Ch. 42 - What is the last control contact that closes on a...Ch. 42 - What influence do both of the polarized field...Ch. 42 - Prob. 7SQCh. 42 - Approximately how much time (in terms of...Ch. 42 - How does the AC coil of the PFR receive the...Ch. 42 - Why is a control relay (CR1) used in Figure 426?...
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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
- Compare between cylindrical rotors and salient pole rotors?arrow_forwardWhat is the ratio of the fixed self-power E1 to the rotor electromotive force E2 by the effective winding cost of the stator and the rotor when the rotor is rotating at the slip s?arrow_forwardIs a magnetization curve needed for a permanent-magnet dc motor? Explain.arrow_forward
- What is the difference between Self Excited and Separately Exited DC motor?arrow_forwardA separately excited generator, when running at 1000 rpm supplied 200 A at 125 V. what will be load current when speed drops to 800 rpm ? The armature resistance is 0.04 ohm and brush drop is 2 V.arrow_forwardThe most suitable rotor which designed to run at high speed is: Select one: a. both salient and non-salient pole b. none of these types c. salient pole type d. non-salient pole typearrow_forward
- 1. Why is DC Motor current so high? 2. How can we reverse the direction of rotation of a DC motor? 3. Can a DC shunt motor be operated on AC supply? Explain.arrow_forward149. Given a 60 Hz, four-pole, induction motors carries a rotor current per phase of 10amperes when loaded until the slip is 5%. If the rotor efficiency resistance is at 0.1 per-phase, what is the total torque transferred across the air gap in lb-ft?arrow_forwardIn a DC shunt generator, the induced EMF is 230 V, the armature resistance is 0.1ohm and the armature current is 200 A. Determine the terminal voltage.arrow_forward
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