Practice - Module Description
Practice Questions
Test your understanding with targeted questions
What is electromechanical energy conversion?
💡 Hint: Think of how motors and generators function.
State the formula for synchronous speed.
💡 Hint: It involves the supply frequency and number of poles.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the principle behind electromechanical energy conversion?
💡 Hint: Consider how energy transformations occur.
True or False: Back EMF increases when motor speed increases.
💡 Hint: Think about the motor's behavior under increased load.
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Challenge Problems
Push your limits with advanced challenges
A three-phase induction motor takes in 40 kW, has stator losses of 800 W, and core losses of 600 W. If it runs at 1200 RPM, calculate: synchronous speed, slip, air-gap power, rotor copper losses, and overall efficiency.
💡 Hint: Use previously discussed equations and details from the efficiency section.
For a separately excited DC motor, if the armature current is 10 A and the supply voltage is 220 V, calculate the back EMF if the armature resistance is 1 Ω.
💡 Hint: Remember how back EMF functions in regulating current.
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Reference links
Supplementary resources to enhance your learning experience.