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

Discussion

A load requiring rated torque at standstill rules out

  • A.armature voltage control of a dc machine
  • B.constant V/f control of an induction machine
  • C.field-oriented control of an induction machine
  • D.stator voltage control of an induction machine

Answer: D

Voltage control reduces the torque with the square of the voltage and only produces low speed by increasing slip, so it can offer nothing at standstill. The other three all hold full flux and give rated torque from zero speed.

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

Post your comment

Please log in or register to post a comment.