a) Draw the equivalent circuit and torque-speed characteristic curve for a series DC motor. b) Briefly explain the induced torque occurs in a series DC motor.
a) Draw the equivalent circuit and torque-speed characteristic curve for a series DC motor. b) Briefly explain the induced torque occurs in a series DC motor.
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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![QUESTION 2
a) Draw the equivalent circuit and torque-speed characteristic curve for a series DC motor.
b) Briefly explain the induced torque occurs in a series DC motor.
e) A 20-hp 240-V 76-A 900 rimin series motor has a field winding of 33 turns per pole. Its
armature resistance is 0.09 2, and its field resistance is 0.06 2. The magnetization curve
expressed in terms of magnetomotive force versus Ex at 900 rimin is given by the following
table:
Table Q2 c): The magnetomotive force table for a de motor taken at 900r'min
E. V
95
150
188 212
229
243
F.A tuus
1000 1500
2000 2500
500
3000
If the motor running at 33 percent of the full-koad armature current, determine:
) The motor's power converted from electrical to mechanical form, Prene
i) The motor's torque, Tnit
ii) The motor's speed, n](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0d09f712-6295-4299-a91a-ad49071c516f%2Fda266777-ab64-436d-b93c-da703bfe99ba%2Ff26rlnr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QUESTION 2
a) Draw the equivalent circuit and torque-speed characteristic curve for a series DC motor.
b) Briefly explain the induced torque occurs in a series DC motor.
e) A 20-hp 240-V 76-A 900 rimin series motor has a field winding of 33 turns per pole. Its
armature resistance is 0.09 2, and its field resistance is 0.06 2. The magnetization curve
expressed in terms of magnetomotive force versus Ex at 900 rimin is given by the following
table:
Table Q2 c): The magnetomotive force table for a de motor taken at 900r'min
E. V
95
150
188 212
229
243
F.A tuus
1000 1500
2000 2500
500
3000
If the motor running at 33 percent of the full-koad armature current, determine:
) The motor's power converted from electrical to mechanical form, Prene
i) The motor's torque, Tnit
ii) The motor's speed, n
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