Machine-translated by Google. Questions are authored in English.
Top

Discussion

Fluid and eddy current couplings share the drawback that

  • A.they require a converter to be provided as well
  • B.they cannot be used with an induction machine
  • C.their losses grow as the speed is reduced
  • D.they cannot transmit torque at any slip at all

Answer: C

Both work by slipping, so the power not delivered is dissipated inside the coupling and the efficiency falls roughly in proportion to the speed reduction. A variable-frequency drive on the motor achieves the same speed reduction while drawing correspondingly less power.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.