Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 39, Problem 4SQ
To determine
Explain the process of a rotor magnetic field establishment.
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Chapter 39 Solutions
Electric Motor Control
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- Q25) i) What are the factors that the induced voltage in three phase induction motor depends upon and Explain how the rotating magnetic field is produced in the three phase induction motor.arrow_forwardA permanent magnet dc motor has rotor radius of 1.3cm,magnetic thickness of 0.25cm and gap length of 0.05cm.The magnetic flux density in the motor is.arrow_forwardThe armature of a 6 pole, lap wound dc machine has 54 slots. Each coil has 15 turns. The average flux density is 1.2 T. The armature length is 15 cm and the diameter is 30 cm. The magnetic poles are designed to cover 90% of the surface area. If the armature speed is 1200 rpm, determine the(i) induced emf in the armature winding (ii) induced emf in the coil(iii) induced emf per turn induced (iv) emf in each conductor(v) What is the power and torque if each conductor is rated at 10 amps?(vi) Which of the above values would change if the generator was wave connected?arrow_forward
- Explain how a rotating magnetic field is produced when a three phase supply is connected across the three phase stator windings of an induction motor.arrow_forwardExplain how rotating magnetic field is produced in 3 phase induction motor.arrow_forwardA 900 rpm, 4 pole wave wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature has 1500 conductors. The shunt field takes 4 A of current. Solve for power developed in the armature (W).arrow_forward
- SUBJECT = ELECTRIC MACHINE When an Induction motor starts, the rotor follows the direction of the rotating magnetic field and starts running in the same direction. Explain the statement by giving proper reason.arrow_forwardHow the rotating magnetic field is produced. Explain its importance in the operation of an Induction Motors.arrow_forwardq4 barrow_forward
- The total conductor of the direct current generator shown in the figure is 1440. The length of the armature is 30cm, the magnetic flux of a pole is 0.8 Tesla and the armature rotates at a speed of 4 m / s. Find the value of the voltage generated by the armature according to the position in the figure.arrow_forwardThe voltage induced by a 6-pole DC generator running at 600 [RPM] with 100 slots on the armature and each armature coil has 4 turns with a flux per pole of 0.01 [Wb] isarrow_forwardDetermine the magnetic flux (per pole) in a 100-V, 780 watts, PM motor operating at a speed of 1500 rpm. The motor constant is 88, the armature resistance is 0.7 Ω, and the rotational losses are (50) Warrow_forward
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