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

Discussion

Field weakening in a permanent magnet synchronous motor is achieved by

  • A.driving stator current on the direct axis to oppose the magnets
  • B.reducing the current in the field winding of the rotor
  • C.increasing the frequency without any change of current
  • D.short-circuiting the damper winding of the machine

Answer: A

Since the magnet flux cannot be turned down, the only route is a stator current component that opposes it, which costs current without producing torque. The available speed range above base speed is therefore more limited than in a wound field machine.

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

Post your comment

Please log in or register to post a comment.