The field windings of the series motor have a resistance of 120 ohms at 15-degree C. After running for two hours, the resistances increase to 140 ohms. If the temperature coefficient of the windings at 0 degree C is 0.004, find the new windings of the temperature

The field windings of the series motor have a resistance of 120 ohms at 15-degree C. After running for two hours, the resistances increase to 140 ohms. If the temperature coefficient of the windings at 0 degree C is 0.004, find the new windings of the temperature

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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Concept explainers

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.

Question

The field windings of the series motor have a resistance of 120 ohms at 15-degree C. After running for two hours, the resistances increase to 140 ohms. If the temperature coefficient of the windings at 0 degree C is 0.004, find the new windings of the temperature

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the field windings of a series motor has a resistance of 120 ohms at 15° c. after running for 2 hours, the resistance has increases to 140 ohms. if the temperature coefficient of the windings at 0°C is 0.004, find the new temperature of the windings
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