| Abstract |
This paper discusses the design decisions made for an 18000 rpm, 34 kW electrical machine that will
be mounted into the flywheel-unit of a hybrid electrical vehicle. The maximum outside diameter of the
electrical machine is limited due to the flywheel arrangement. The machine must be compact and very
high efficiency levels are desirable. An axial-flux-permanent-magnet (AFPM) machine is found to be
the most suitable type as far as its shape is concerned. The sinusoidal-current driven machine is
preferred for its efficiency. The effect of outside diameter, inside-to-outside diameter ratio, number of
slots, magnet span, skewing, and stator offsetting are discussed for AFPM machine in relation to the
given application requirements. |
