Magnequench Technical Resource Website, a subsite of

Salient Features for High Speed Motor Design – Part 1

Number of Poles

Increase number of poles

  • Better utilization of magnet
  • Shorter copper overhang length will reduce copper loss
  • Increased fundamental frequency and switching frequency, increased core loss
  • Complex and costly motor control

Magnet Material

  • Epoxy in MQ1TM magnet will lead to higher magnet resistivity and lower eddy current loss
  • The use of fully dense sintered NdFeB magnet leads to lower resistivity and higher eddy current loss.
    • Need of magnet segmentation which increase the cost due to complex assembly
  • Sintered neo ring is relatively more expensive than MQ1TM .