Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
What is the role of End Ring or Slip Ring (with brushes) in the rotor circuit of three-phase induction machine?
to close the rotor circuit.
all of these
to balance the rotor while its in rotation
to reduced harmonic
to close the rotor circuit.
The correct answer is A) to close the rotor circuit, as the end ring in a slip ring induction motor connects the rotor winding to the external circuit, allowing the rotor currents to generate the necessary magnetic field for operation.
The correct answer is A) to close the rotor circuit, as the end ring in a slip ring induction motor connects the rotor winding to the external circuit, allowing the rotor currents to generate the necessary magnetic field for operation.
The end ring or slip ring works by providing a conducting path for the rotor windings ┬╖ This facilitates the transfer of electrical energy generated in the rotor due to rotor rotation within the stator's magnetic field, thereby enabling torque production.
End rings are essential for closed-loop operation in slip ring induction motors.
They allow for the collection and transfer of rotor currents to external circuits.
Improved starting torque due to consistent rotor field generation.
Flexibility in controlling rotor current for varied applications.
Increased maintenance due to wear of brushes.
Higher cost compared to squirrel cage induction motors.
Used in applications requiring high starting torque, like cranes.
Suitable for variable speed applications.
Standard specifications may vary by manufacturer and application needs.
Option B is incorrect as it does not specify a function unique to the end ring or slip ring; Option C relates to stability not primarily affected by the end ring; and Option D, while related to harmonics, is not a primary benefit of the end ring.
A is correct тАФ the end ring is critical to completing the rotor circuit for effective operation.
Understanding the rotor dynamics, particularly in slip ring motors, will aid in grasping the overall performance characteristics and applications of induction motors.