7. A d.c. series motor on full-load takes 50 A from 230 V d.c. mains. The total resistance of the motor is 0.22 2. If the iron and friction losses together amount to 5% of the input, calculate the power delivered by the motor shaft. Total voltage drop due to the brush contact is 2 A. (10.275 kW)

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
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Please help me answer number 7. Please show a CLEAR and READABLE solution/s. Thanks!!! The course subject is Electrical Machines 1.

NOTE: The answer is given on the bottom side of the image. Could you show me the solution to how to get it? Super thanks!!!

7.
A d.c. series motor on full-load takes 50 A from 230 V d.c. mains. The total resistance of the motor
is 0.22 2. If the iron and friction losses together amount to 5% of the input, calculate the power
delivered by the motor shaft. Total voltage drop due to the brush contact is 2 A. (10.275 kW)
Transcribed Image Text:7. A d.c. series motor on full-load takes 50 A from 230 V d.c. mains. The total resistance of the motor is 0.22 2. If the iron and friction losses together amount to 5% of the input, calculate the power delivered by the motor shaft. Total voltage drop due to the brush contact is 2 A. (10.275 kW)
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