A rotor of a synchronous reluctance motor may include: a plurality of laminations forming a stack, each lamination including: two parallel surfaces and a perimeter that define the lamination and a direction of stacking the laminations that is perpendicular to the parallel surfaces, the lamination at least partially filled with a magnetically soft electrical conductor and at least one cavity encircled by the conductor and extending from a first to a second surface of the two parallel surfaces, the conductor forming at least one bridge at the perimeter of the lamination from one side of the at least one cavity to another side of the at least one cavity. A value of a magnetic property and a value of a mechanical property of the at least one bridge differs from a value of the magnetic property and a value of the mechanical property of the conductor material.

A moving member of a machine can include a cold plate that serves as a primary structural member for the moving member. The cold plate can have one or more cooling channels formed within the cold plate. A plurality of armature windings can be fixed to the cold plate. One or more field windings can be fixed to the cold plate. A plurality of ferromagnetic cores can be fixed to the cold plate, each ferromagnetic core positioned within a loop of at least one of the plurality of armature windings. Other embodiments are described.

A moving member of a machine can include a cold plate that serves as a primary structural member for the moving member. The cold plate can have one or more cooling channels formed within the cold plate. A plurality of armature windings can be fixed to the cold plate. One or more field windings can be fixed to the cold plate. A plurality of ferromagnetic cores can be fixed to the cold plate, each ferromagnetic core positioned within a loop of at least one of the plurality of armature windings. Other embodiments are described.

A rotor including: a drive shaft rotating about an axis of rotation, a plurality of annular rotor plates, identical to each other, mounted on the drive shaft, superposed along the axis of rotation and including a plurality of openings, a pair of closing plates which are located at the ends of said plurality of rotor plates, a plurality of bars, passing through at least part of said plurality of openings of the plurality di rotor plates, a pair of short-circuit rings located a the ends of said plurality of bars and wherein an active ratio between a first area occupied by the plurality of openings and a total area of the rotor plate is greater than or equal to 0.30, that is, R1=A1/AT ≥ 0.30.

Disclosed are a rotor structure, a permanent magnet auxiliary synchronous reluctance motor, and an electric vehicle. The rotor structure includes a rotor body; the rotor body is provided with permanent magnet slot groups each including multiple layers of permanent magnet slots; the multiple layers of permanent magnet slots include a first permanent magnet slot; and the first permanent magnet slot includes a first permanent magnet slot section and a first bent slot. A first end of the first bent slot is connected to a second end of the first permanent magnet slot section, a second end of the first bent slot is arranged to extend toward an outer edge of the rotor body.

The disclosure relates to a method for designing a stator segment for a stator of an m-phase synchronous reluctance machine with concentrated windings, the stator being divided into a stator segment or a plurality of stator segments and comprising a ferromagnetic base body with peripherally distributed tooth structures and a winding system mounted in the base body, which comprises, per stator segment, z tooth structures and a number of winding phases (U, V, W) corresponding to the number of phases m, each of said winding phases comprising a series connection and/or a parallel connection of a plurality of the concentrated windings, a rotor of the synchronous reluctance machine comprising a pole number p in a peripheral section corresponding to the stator segment.

The disclosure relates to a method for designing a stator segment for a stator of an m-phase synchronous reluctance machine with concentrated windings, the stator being divided into a stator segment or a plurality of stator segments and comprising a ferromagnetic base body with peripherally distributed tooth structures and a winding system mounted in the base body, which comprises, per stator segment, z tooth structures and a number of winding phases (U, V, W) corresponding to the number of phases m, each of said winding phases comprising a series connection and/or a parallel connection of a plurality of the concentrated windings, a rotor of the synchronous reluctance machine comprising a pole number p in a peripheral section corresponding to the stator segment.

This rotary electric machine includes: an electric motor; a power supply unit including a heat-dissipation member, a power module, and a cover covering the heat-dissipation member and the power module; and a coolant path. A connection portion connecting the electric motor and the power supply unit is provided between the housing and the power supply unit. A cylindrical portion of the cover extends toward the one side in the axial direction and covers the connection portion from the radially outer side. The coolant path is provided at one or both of the heat-dissipation member and an area between the heat-dissipation member and the housing. The coolant path overlaps the power module as seen in the axial direction. The cylindrical portion of the cover has an opening through which a coolant passes, at a circumferential-direction position different from a circumferential-direction position on the radially outer side of the connection portion.

The invention relates to an electric machine (1) comprising at least one stator (2), the stator being formed by a body (21) and teeth (22) arranged on the inner face (221) of the body (21) of the stator (2), the stator (2) comprising at least one inner recess (24) formed in the body (21) of the stator (2), of any geometric shape allowing the mechanical stresses on the stator (2) to be limited.

Described is a method for optimizing a synchronous reluctance motor assisted by magnets (1), comprising the arrangement of a stator (2) provided with a number (t) of slots (3), the arrangement of a rotor (4) having an outer cylindrical surface (S.sub.e) of radius (r.sub.e), an inner cylindrical surface (S.sub.I) of radius (r.sub.I), a rotation axis (A) and a number (p) of pole pairs, realisation in the rotor (4) of a number (n) of slots (7) defining flow barriers (Bn) with axial extension for each pole of the motor (1), designed to house magnets (6) and definition of each barrier (B.sub.n) with peripheral profile in the form of a circular segment with convexity facing towards the axis (A) and with concentric radii of curvature (r.sub.nA, r.sub.nB) with common centre (C) arranged along a radial axis (X). The number (n) of barriers (B.sub.n) is greater than or equal to 3, the centre (C) is located outside the surface (Se) and each barrier (Bn) has a constant thickness (bn) along its arcuate extension defined by the difference between the radii (r.sub.nA, r.sub.nB). The thicknesses (b.sub.n) are progressively decreasing from the surface (S.sub.i) to the surface (S.sub.e) with optimal thickness (b.sub.n) of the outer barrier (Bn) equal to b.sub.n=k.sub.n−1b.sub.1, where k.sub.n−1 is a numerical coefficient relative to the n-th barrier (B) corresponding to a substantially constant magnetic permeance across the barriers (B.sub.n) and to a response to a quadrature excitation current with minimum harmonic content.