Performance evaluation of permanent magnet synchronous machines with concentrated and distributed windings including the effect of field-weakening

Optimal Flux Weakening in Surface PM Machines Using Fractional-Slot Concentrated Windings

“…Reference [6] describes an SPM machine equipped with fractional-slot concentrated windings that achieves a wide constant-power speed ratio (CPSR). However, few details are provided to explain the underlying 0093-9994/$20.00 © 2005 IEEE theoretical principles for achieving this performance or how it can be replicated in new designs.…”

Implementation of fractional slot concentrated winding technique to large salient-pole synchronous generators & development with permanent magnets

“…This means that all coil sides of a certain phase are concentrated in a single slot under one pole, thus requiring deep slots. Concentrated winding machines potentially have more compact and simpler designs and also low copper losses compared to conventional machine designs with distributed windings, due to their shorter end-windings and the reduction provided by these windings in the total length of the machine and also its weight and cost [6,10]. When these concentrated windings are combined with the fractional slot winding technique, the machines designed with this combination are called FSCW machines.…”

Analysis of Surface Permanent Magnet Machines With Fractional-Slot Concentrated Windings

“…Finite element analysis (FEA) has been adopted as the principal analytical tool in recent papers that address the use of concentrated windings in SPM machines [5]- [8]. While FEA is capable of providing accurate results, it is computationally time-consuming and does not easily provide insights into the performance effects of key design parameters.…”