A four-pole induction motor drives a load at 2478 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. 1- Value Submit HÅ Part B Request Answer I= Value DMC ? If the do-to-ac converter has a power efficiency of 90 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. Submit Request Answer Units Units ?

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
Question
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A four-pole induction motor drives a load at 2478
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
I =
HA
Request Answer
Submit
If the dc-to-ac converter has a power efficiency of 90 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.
HÅ
Value
Units
Request Answer
?
Units
?
Transcribed Image Text:A four-pole induction motor drives a load at 2478 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 I = HA Request Answer Submit If the dc-to-ac converter has a power efficiency of 90 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. HÅ Value Units Request Answer ? Units ?
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