What are the advantages of Squirrel cage induction motor compare to the Slip ring induction motor?

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Option D: All of these

Explanation & Concepts:
The advantages of squirrel cage induction motors over slip ring induction motors include high efficiency, low maintenance, simple construction, and reduced risk of sparking. These factors contribute to their popular use in various applications.

Working Principle: Squirrel cage induction motors operate on the principle of electromagnetic induction, where the rotor is composed of conductive bars short-circuited at both ends, creating a closed loop. This design allows for simpler construction and reduced maintenance, as there are no brushes or slip rings as found in slip ring motors.

Key Points: Squirrel cage motors have a simpler design compared to slip ring motors.; They are maintenance-free due to the absence of brushes.

Advantages: High efficiency and low maintenance; Simplest and rugged construction; No issue of sparking in the rotor circuit

Disadvantages: Limited ability to control speed; Less suited for variable load applications

Applications: Pumps and fans; Conveyor systems

Additional Info: Squirrel cage motors are typically more cost-effective.. Slip ring motors, while providing better starting torque, have higher maintenance needs.

Answer: D is correct — All mentioned advantages apply to squirrel cage induction motors.

Exam Tip: Focus on understanding the construction and operational principles of different motor types for better performance in electrical machinery topics.

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Option A: high efficiency and low maintenance

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Option B: simplest and rugged construction

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Option C: no issue of sparking in the rotor circuit

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