Question
a. A D.C. series motor draws 45A from a D.C. supply when developing the rated torque at 1500 rpm. If the motor develops 1/4 rated
a. A D.C. series motor draws 45A from a D.C. supply when developing the rated torque at 1500 rpm. If the motor develops 1/4 rated torque, neglecting saturation and losses, evaluate: i. the current drawn by the motor; and ii. the motor speed. b. A D.C. shunt motor is connected to a 240 V D.C. supply, and draws the input current of 20 A at 750 rpm. The motor has an armature resistance of 0.5 and the field resistance of 120 . i. Draw the equivalent circuit of the motor; ii. Evaluate the back emf of the motor; iii. Evaluate the motor torque; iv. Evaluate the motor efficiency. iii. Evaluate the resistance connected in series with the armature if the motor speed is reduced to 600 rpm and the torque is kept unchanged
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get StartedRecommended Textbook for
Electric Machinery
Authors: Charles Kingsley, Jr, Stephen D. Umans
6th Edition
71230106, 9780073660097, 73660094, 978-0071230100
Students also viewed these Mechanical Engineering questions
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
Question
Answered: 1 week ago
View Answer in SolutionInn App