Abstract: A rotating field machine (200) including a stator (140) and a rotor (150) are provided. In particular, a dual-winding rotating field machine (200) in which the stator (140) includes two separate windings can be provided. In one example implementation, the stator (140) can include an excitation winding (220) configured to control an excitation current and a power winding (230) configured to control power flow to an electrical system. The dual-winding rotating field machine (200) can further include a starting mode and a generating mode. During the starting mode, both the excitation winding (220) and the power winding (230) can be coupled to one or more switching power converters (170). During the generating mode, the power winding (230) can be coupled to a variable frequency bus and the power converter (170) can be used to manage excitation power only.

Abstract: A rotating field machine (200) including a stator (140) and a rotor (150) are provided. In particular, a dual-winding rotating field machine (200) in which the stator (140) includes two separate windings can be provided. In one example implementation, the stator (140) can include an excitation winding (220) configured to control an excitation current and a power winding (230) configured to control power flow to an electrical system. The dual-winding rotating field machine (200) can further include a starting mode and a generating mode. During the starting mode, both the excitation winding (220) and the power winding (230) can be coupled to one or more switching power converters (170). During the generating mode, the power winding (230) can be coupled to a variable frequency bus and the power converter (170) can be used to manage excitation power only.

Abstract: 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 optimize 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.

Abstract: 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.