Symmetrical/Asymmetrical Winding Reconfiguration in Multiphase Machines

Investigation of unbalanced magnetic force in permanent magnet brushless dc machines with diametrically asymmetric winding

The purpose of this paper is the calculation of Unbalanced Magnetic Force (UMF) in permanent magnet brushless DC (PMBLDC) machines with diametrically asymmetric winding and investigation of UMF variations in the presence of phase advance angle. This paper presents an analytical model of UMF in surface mounted PMBLDC machines that have a fractional ratio of slot number to pole number. This model...

Asynchronous Reconfiguration for Paxos State Machines

This paper addresses reconfiguration of a Replicated State Machine (RSM) in an asynchronous system. It is well known that consensus cannot be solved in an asynchronous system. Therefore an RSM providing strong consistency, cannot guarantee progress in an asynchronous system. However, we show that reconfiguring the RSM is possible in a purely asynchronous system. This differs from all existing r...

‘Pseudo’ Direct Drive Electrical machines with alternative winding configurations

New Cost Effective Concentrated Winding Topolology for Induction Machines

Recently, the industry is more and more interested in fractional slot concentrated windings (FSCW), because of many advantages such as high power density and low manufacturing costs. Novel FSCWs often consist of several winding systems. This structure allows the creation of good MMF distributions with low space harmonic contents and reduces undesirable side effects, such as localized core satur...

Transient Model for Induction Machines With Stator Winding Turn Faults

A transient model for an induction machine with stator winding turn faults is derived using reference frame transformation theory. A state-space representation of the dynamic equations, suitable for digital simulation is provided. Steady-state equivalent circuits are derived, from which the sequence components of the line currents can be estimated as a function of fault severity. Experimental r...