Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 51, Problem 2SQ
Differentiate between the AC and DC magnetic fields applied to an induction motor stator.
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a. Explain how a rotating magnetic field is produced in a three-phase induction motor. b. Explain the rotor action on a three-phase squirrel cage motor when the load increases from NO-LOAD to rated FULL- LOAD
Define slip in an induction motor.
Write four disadvantages of stator voltage speed control method of 3phase induction motor.
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Electric Motor Control
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- Name three factors that determine the torque produced by an induction motor.arrow_forwardA three-phase induction motor has a rotor resistance and standstill reactance of 0.1 ohm and 3.5 ohms per phase respectively. The rotor emf at a standstill is 60 volts per phase, for slip of 5% what is the power developed?arrow_forwardDraw the phasor diagram of an induction motor showing applied voltage magnetizing.core loss, load current and the line current. Label each component.arrow_forward
- A 3-phase induction motor has a rotor resitance and standstill reactance of 0.1 ohm and 3.5 ohms per phase respectively. The rotor emf at a standstills is 60 volts per phase, for slip of 5% what is the power developed?arrow_forward4. Why Induction motors are extensively used these days:arrow_forwardBriefly explain stator frequency speed control method of induction motorarrow_forward
- Review/Explain three starting methods used with an induction motor.arrow_forwardExplain in details why does the rotor of the three phase induction motor rotate, then determine the speed of the revolving field relative to i) stator field distribution ii) rotor structure.arrow_forwardReview/Explain with the aid of sketches the following excitation methods for a synchronous motor. DC EXCITATION, DC BRUSHLESS, AC EXCITATION. Review/Explain three starting methods used with an induction motor.arrow_forward
- Explain working of an induction motor in your own word and in detail Please do it fastarrow_forwardEQUIVALENT CICUIT DIAGRAM OF AN INDUCTION MOTOR OVER THE WOUND ROTOR INDUCTION MOTOR AND LABEL ON IT.arrow_forwardHow is a rotating magnetic field produced in a three-phase induction motor? Explain itwith the help of suitable diagrams.arrow_forward
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