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A repulsion-start induction-run motor combines

  • A.shaded pole starting with capacitor running
  • B.synchronous starting with induction running
  • C.repulsion starting with cage running
  • D.capacitor starting with repulsion running

Answer: C

A centrifugal device short-circuits all the commutator segments together at speed, turning the rotor into a cage, so the machine gets a high starting torque and a good running characteristic. Its complexity is what made the capacitor machine displace it.

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