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

Discussion

The cheapest adequate speed control method for a simple fan is usually

  • A.a scoop-controlled fluid coupling
  • B.a stepped pulley and belt arrangement
  • C.open-loop V/f control
  • D.closed-loop field-oriented control with an encoder

Answer: C

A fan needs neither accuracy nor torque at low speed, so the simplest converter setting serves and the cubic law delivers the saving. Spending on feedback or on a coupling adds cost without adding anything the load needs.

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

Post your comment

Please log in or register to post a comment.