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In a double squirrel cage motor, the outer cage is made of high resistance metal bars primarily for the purpose of increasing its ______.
  • a)
    Starting torque
  • b)
    Speed regulation
  • c)
    Efficiency
  • d)
    Starting current
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In a double squirrel cage motor, the outer cage is made of high resist...
In a double squirrel cage motor, the outer cage is made of high resistance metal bars primarily for the purpose of increasing its starting torque.
A double squirrel-cage induction motor has two parallel windings in the rotor. The rotor of a double squirrel cage motor has two independent cages on the same rotor. The outer cage has a smaller cross-sectional area than the lower cage. Bars of high resistance and low reactance are placed in the outer cage, and bars of low resistance and high reactance are placed in the inner cage. The outer cage has a high ‘resistance to reactance ratio 'whereas, the inner cage has a low 'resistance to reactance ratio'. Hence double cage rotor has a low starting current and high starting torque, therefore, it is more suitable for direct on line starting.
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In a double squirrel cage motor, the outer cage is made of high resistance metal bars primarily for the purpose of increasing its ______.a)Starting torqueb)Speed regulationc)Efficiencyd)Starting currentCorrect answer is option 'A'. Can you explain this answer?
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