A 4-pole, 75 kW, 3-phase, Y connected load, 50Hz 440 V synchronous motor operates at rated condition with 0.8 pf leading. The motor efficiency excluding field and stator losses is 95% and Xs = 2.5 ohms what is the machinal power developed? a. 15250 W b. 92000 W c. 78950 W d. 52446 W

A 4-pole, 75 kW, 3-phase, Y connected load, 50Hz 440 V synchronous motor operates at rated condition with 0.8 pf leading. The motor efficiency excluding field and stator losses is 95% and Xs = 2.5 ohms what is the machinal power developed? a. 15250 W b. 92000 W c. 78950 W d. 52446 W

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter9: Components For Electric Motors

Section: Chapter Questions

Problem 8RQ

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Concept explainers

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.

Question

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DC/AC MOTOR (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG EXPLANATIONS NEEDED. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWER.)

a. 15250 W

b. 92000 W

c. 78950 W

d. 52446 W

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Follow-up Questions

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Follow-up Question

What is the power factor angle?

a. -12 degrees

b. 45 degrees

c. -30 degrees

d. -18 degrees

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