Method for designing a rotor structure of a synchronous reluctance electric machine, and corresponding synchronous reluctance electric machine

摘要

A method for designing a rotor structure of a synchronous reluctance electric machine, wherein the rotor structure has an annular arrangement about a central opening designed to be engaged by a rotation shaft, and provided with a plurality of magnetic portions, a plurality of electromagnetic flux barriers interposed between the magnetic portions, and radial connecting elements, for the mechanical connection between radially adjacent magnetic portions, the electromagnetic flux barriers defining at least one maximum magnetic reluctance path along a maximum reluctance axis and a minimum reluctance path along a minimum reluctance axis. The method envisages defining the arrangement the electromagnetic flux barriers and/or the radial connecting elements so as to jointly optimise electromagnetic performance of the synchronous reluctance electric machine and mechanical resistance properties, in particular the resistance to centrifugal forces due to rotation about the rotation shaft.

主权项

1. A method for designing a rotor structure (22) of a synchronous reluctance electric machine (20), wherein the rotor structure (22) has an annular arrangement about a central opening (5) designed to be engaged by a rotation shaft, and comprises a plurality of magnetic portions (6′) and a plurality of electromagnetic flux barriers (8′) interposed between the magnetic portions (6′), said electromagnetic flux barriers (8′) defining at least one maximum magnetic reluctance path along a maximum reluctance axis (q) and a minimum reluctance path along a minimum reluctance axis (d),
comprising the step of defining the arrangement of said electromagnetic flux barriers (8′) so as to jointly optimise electromagnetic performance of said synchronous reluctance electric machine (20) and mechanical resistance properties, in particular the resistance to centrifugal forces due to rotation about said rotation shaft, wherein said step of defining comprises implementing a translation of said electromagnetic flux barriers (8′) towards an outer side surface (S) of said rotor structure (22) with respect to a starting position, not optimised with regard to said electromagnetic performance and said mechanical resistance properties.