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 MQ1^TM 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 MQ1^TM .