A
MID GROWING awareness of global environmental
problems, the research and development of hybrid electric vehicles (HEVs) and electric vehicles (EVs) attract much
attention in the automobile industry. Thus, the application of
the brushless permanent magnet DC motor for HEV and EV
automobiles is also on the increase due to its high efficiency,
compactness, fast dynamics and large torque to inertial ratio.
The substantial improvement in the output power of a motor is
still required in the industrial field [1]. There is, however, an
easy way to increase motor volume in order to obtain higher
output power. High space factor rectangular coils (segment
conductors) which create magnetic rotating flux in stators are
not being used as the main component of high power motors in
low and medium power range applications. These rectangular
coils are still being used in large power range motors and in
power transformers