Abstract: The paper presents a study on the design and analysis of a
sub-fractional slot concentrated winding brushless direct current motor (BLDCM)
with unequal tooth widths for a light electric vehicle application. This kind
of brushless surface permanent magnet (SPM) motor is equipped with
easy-to-manufacture features which are crucial for the electrical machinery
market, especially for electric motors used in electric vehicles. The structure
also responds quite effectively to field weakening operation, because of its
inherent higher inductance value. The study is focused on increasing the
winding inductance value by using the designs analysed in magnetic analysis
software. A selected BLDC motor structure is manufactured and tested to verify
the design.
Keywords: Subfractional slot concentrated winding, surface magnet BLDCM, field weakening
