Integrated Starter Alternators for micro and mild
hybrid vehicles require wide torque-speed characteristics. This
paper reports a Phase Pole Modulated (PPM) Induction Machine
(IM) to achieve wide torque-speed characteristics by implementing
different pole pair combinations in a single machine. A novel
concept of independent phase belt control technique has been
reported in detail, which allows higher flexibility than the phase
pole modulated machines reported in previous literature. In this
design study a 12 leg inverter has been used to achieve 2/4/6/8/10
pole configurations of a single machine. This design reports the
possibility of removing the constraint of the magnetic space phase
angle difference between two consecutive phase belts of a machine
to be a submultiple of or even 2 , which in turn allows
fractional slots/pole for an induction machine. The proposed
design has been validated using two-dimensional finite element
analysis (2D FEA). Further, analytic expressions for equivalent
circuit parameters of this proposed machine have been reported
as well, which have been verified against FEA results
