Comparison of optimal slot/pole number combinations in fractional slot permanent magnet synchronous machines having similar slot and pole numbers

Fractional Slot Permanent Magnet Synchronous Motors for Low Speed Applications

Investigation on Slot–Pole Combinations of a PM Vernier Motor with Fractional-Slot Concentrated Winding Configurations

This paper presents a new method to find available slot–pole combination of a permanent magnet (PM) vernier motor with fractional-slot concentrated winding (FSCW) configurations instead of the conventional design rule. To this aim, for a common structure of PM vernier machines with FSCW, the air gap flux densities including modulation flux due to vernier effects are investigated from the magnet...

Six Phase Permanent Magnet Machine with Fractional Slot Concentrated Winding

Permanent Magnet Machines (PMM) with a phase number (m) higher than three allow redundancy and lower torque ripple compared to their three phase counterparts. In this paper, a six phase permanent magnet machine with surface rotor magnets, designed with fractional slot tooth winding is proposed. A stator design with fractional slot tooth winding allows the design of a compact machine through sho...

Detent Force Analysis and Optimization for Vertical Permanent-magnet Linear Synchronous Motor with Fractional-slot Windings

This paper investigates the detent force modeling and optimization of a iron-core type 16-pole 15-slot permanent magnet linear synchronous motor (PMLSM) for ropeless elevator applications. Variable network non-linear magnetic equivalent circuit (VNMEC) model is established to predict the detent force of PMLSM. The topology structure of equivalent magnetic circuit is developed and the permeance ...

Design Guidelines for Fractional Slot Multi-Phase Modular Permanent Magnet Machines

This paper presents the design considerations for a fractional slot multi-phase modular permanent magnet (PM) machine with single-layer concentrated windings. The winding factors for various slot/pole number combinations are calculated to identify the optimal slot/pole number combinations for different phase numbers. In addition, the electromagnetic performance influenced by flux gaps (FGs), su...