The torque analysis shows that the cogging torque depends mainly on the length of the slot opening,
and that efficiency and output power are decreased by the magnetic flux leakage of teeth in the case of motors with a closed
slot opening. This has the opposite effect to the output power.
The cogging torque could be reduced as small as the width of
the slot opening, but the output power is also decreased to a
critical point. The developed motor could obtain about 120%
greater power density per volume compared to commercial motors by analyzing the slot to pole combinations and the closed
slot opening. The design and experimental verification of rectangular copper winding technology applied in motors is also a
very useful outcome in terms of low and medium applications
for other industrial fields.