Stator slot geometry
• In small motors with small diameters the taper on the
tooth or slot is significant and tapered slots (parallel
sided teeth) are used. This gives maximum area of
slot for given tooth flux density. Round wires of small
gauge are used since they are easy to wind and do
not mind the taper of the slot.
• In larger machines with larger diameters, the tooth
taper is much less and often strip conductors are
used which need parallel sided slots, thus tapered
teeth.