A four-pole induction motor drives a load at 2575 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages.

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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A four-pole induction motor drives a load at 2575 rpm. This is to be
accomplished by using an electronic converter to convert a 400-V dc source
into a set of three-phase ac voltages.
▾ Part A
Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp.
Express your answer to three significant figures and include the appropriate units.
f=
Submit
▾ Part B
Value
μÀ
Submit
I= Value
Provide Feedback
^
Request Answer
If the dc-to-ac converter has a power efficiency of 85 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source.
Express your answer to three significant figures and include the appropriate units.
4
Ò
Request Answer
Units
?
Units
?
Transcribed Image Text:A four-pole induction motor drives a load at 2575 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. ▾ Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit ▾ Part B Value μÀ Submit I= Value Provide Feedback ^ Request Answer If the dc-to-ac converter has a power efficiency of 85 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. 4 Ò Request Answer Units ? Units ?
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