An electric motor has a housing with a main part and a side cover; a stator; a rotor having a rotor shaft; and a rolling bearing assembly located on a first side of the stator. The rotor shaft is mounted with the side cover via the first rolling bearing assembly, which transmit axial loads exerted on the rotor shaft to the side cover. The side cover is fixedly secured to the main part, located on the first side of the stator. The side cover abuts against the first rolling bearing assembly, so that said axial loads are transmitted to the main part by the side cover. When the side cover is not secured to the main part, the housing is open, allowing insertion of the rotor into the stator via the first side of the stator.

The invention relates to a variable reluctance resolver (10), comprising a rotor (20) and a stator (30) coaxial with the rotor (20), the stator (30) comprising a plurality of teeth (31), two consecutive teeth (31) forming a tooth angle (D), the rotor (20) comprising a stack of elementary strata coaxially stacked along a central axis (X), characterised in that each elementary stratum defines at least one pair of poles (21M, 21m), the stack comprising a first elementary stratum (25) defining the bottom of the stack and at least one upper elementary stratum (26) superimposed on the first elementary stratum (25), each upper elementary stratum (26) being angularly offset by an offset angle (P) about the central axis (X) with respect to the underlying elementary stratum, the offset angle (P) being equal to the tooth angle (D) multiplied by (N1)/N, N being the number of stacked elementary strata (25, 26).

The invention relates to a variable reluctance resolver (10), comprising a rotor (20) and a stator (30) coaxial with the rotor (20), the stator (30) comprising a plurality of teeth (31), two consecutive teeth (31) forming a tooth angle (D), the rotor (20) comprising a stack of elementary strata coaxially stacked along a central axis (X), characterised in that each elementary stratum defines at least one pair of poles (21M, 21m), the stack comprising a first elementary stratum (25) defining the bottom of the stack and at least one upper elementary stratum (26) superimposed on the first elementary stratum (25), each upper elementary stratum (26) being angularly offset by an offset angle (P) about the central axis (X) with respect to the underlying elementary stratum, the offset angle (P) being equal to the tooth angle (D) multiplied by (N1)/N, N being the number of stacked elementary strata (25, 26).

An electric machine includes a stator having a plurality of windings and a rotor positioned within the stator. The rotor includes a lamination stack formed from a plurality of lamination sheets with a plurality of slots formed in the lamination stack. The rotor further includes a plurality of magnets arranged in the plurality of slots. At least one of the plurality of lamination sheets includes a tab extending into an associated one of the plurality of slots, the tab including a bent distal tip defining a distal curved surface and a bent proximal joint defining a proximal curved surface, wherein the distal curved surface engages one of the plurality of magnets positioned in the associated one of the plurality of slots.

An electric machine includes a stator having a plurality of windings and a rotor positioned within the stator. The rotor includes a lamination stack formed from a plurality of lamination sheets with a plurality of slots formed in the lamination stack. The rotor further includes a plurality of magnets arranged in the plurality of slots. At least one of the plurality of lamination sheets includes a tab extending into an associated one of the plurality of slots, the tab including a bent distal tip defining a distal curved surface and a bent proximal joint defining a proximal curved surface, wherein the distal curved surface engages one of the plurality of magnets positioned in the associated one of the plurality of slots.

An frame of an electric rotating machine has a cylinder portion that fits a stator core on an inner circumferential surface thereof, a fastening flange that protrudes from an axis-direction end portion of the cylinder portion toward the axis-direction outside of the cylinder portion and is fastened to a supporting member; the fastening flange is formed in such a way as to incline toward a direction departing from the outer circumferential surface of the cylinder portion with respect to the radial direction of the cylinder portion; it is configured in such a way that in a state where the fastening flange is fastened to the supporting member, compression-direction stress is generated on a root portion, at the outer-circumferential-surface side of the cylinder portion, of the fastening flange.

An frame of an electric rotating machine has a cylinder portion that fits a stator core on an inner circumferential surface thereof, a fastening flange that protrudes from an axis-direction end portion of the cylinder portion toward the axis-direction outside of the cylinder portion and is fastened to a supporting member; the fastening flange is formed in such a way as to incline toward a direction departing from the outer circumferential surface of the cylinder portion with respect to the radial direction of the cylinder portion; it is configured in such a way that in a state where the fastening flange is fastened to the supporting member, compression-direction stress is generated on a root portion, at the outer-circumferential-surface side of the cylinder portion, of the fastening flange.

A coil feeding apparatus is configured to feed a material coil in a predetermined direction to manufacture a hairpin of a motor. The coil feeding apparatus includes a base plate provided on an upper surface thereof with a base rail and a guide rail connected to each other to form a straight path, a feeding module provided so as to reciprocate along the base rail and provided with a plurality of feeding grippers configured to grip the material coil, a fixed module disposed downstream of the feeding module on a feeding path of the material coil while being spaced a predetermined distance from the feeding module and provided with a fixed gripper configured to grip the material coil, and a guide module disposed between the feeding module and the fixed module to guide the material coil so that the material coil is fed straight.

A coil feeding apparatus is configured to feed a material coil in a predetermined direction to manufacture a hairpin of a motor. The coil feeding apparatus includes a base plate provided on an upper surface thereof with a base rail and a guide rail connected to each other to form a straight path, a feeding module provided so as to reciprocate along the base rail and provided with a plurality of feeding grippers configured to grip the material coil, a fixed module disposed downstream of the feeding module on a feeding path of the material coil while being spaced a predetermined distance from the feeding module and provided with a fixed gripper configured to grip the material coil, and a guide module disposed between the feeding module and the fixed module to guide the material coil so that the material coil is fed straight.

A method of manufacturing a rotor, including: a ring-shaped magnet forming step of forming a ring-shaped magnet by arranging a plurality of segment magnets that have been magnetized, in a ring shape; an insertion step of inserting a shaft serving as a rotary shaft into a through hole of the ring-shaped magnet from an end portion of the shaft on an axial of the shaft; and a sleeve mounting step of mounting a sleeve for fixing the ring-shaped magnet to the shaft, to an outer periphery of the ring-shaped magnet positioned around an outer periphery of the shaft.