I definitely want to bond the laminations together. At the moment, the plan is to get the 75+ different lamination profiles laser cut and bonded into core modules. Haven't had a quote yet, thoughfechter wrote:It would be a lot of work, but it might be worth using some kind of adhesive between the laminations.
For an AFPMSM whose stator flux is flowing in axial direction
in the major part of the stator, GO material was compared
with NO material. With GO material, the machine has about 7
times less iron loss at the same speed, and a 10% higher torque
for the same current. Nevertheless, the EMF at no-load is almost
the same for both materials. For a given torque, the GO material
causes a 10% higher torque-to-current ratio which makes
it possible to reduce the copper losses—quadratic with the current—
by about 20%. Alternatively, because of the lower iron
losses, it is possible with GO material to allow larger copper
losses without increasing the temperature of the machine. This
means a higher stator current and more torque.We conclude that
for the considered type of PMSM, it is worth the extra cost to
use GO material.
When connecting n concentrated windings in series, the total electromotive force is not n times the voltage of a single winding, because of phase shift in the neighboring windings
bearing wrote:When connecting n concentrated windings in series, the total electromotive force is not n times the voltage of a single winding, because of phase shift in the neighboring windings
This is the so called "winding factor". In a good design the phase difference won't be very big. I think Miles had about 0.95, so it won't do much to increase it to 1.
Although a multiphase system for concentrated pole windings
is proposed in , a regular three-phase system is used in
this paper. In order to obtain a high winding factor, the number
of teeth is set to 15 resulting in a winding factor of 0.951 for the
Users browsing this forum: pm_dawn and 5 guests