A winding arrangement for a stator of an electric motor includes winding hairpins arranged to form one or more phases. The stator includes a plurality of motor teeth forming a plurality of slots each configured to accommodate multiple layers. A first set of winding hairpins spanning of M slots are coupled in series and coupled to a phase lead, and are arranged sequentially in a first azimuthal direction. A jumper is arranged in a layer and is coupled in series with the first set of winding hairpins. A second set of winding hairpins configured to span of M slots are coupled in series between the jumper and a neutral lead. The second set of winding hairpins are arranged sequentially in the opposite azimuthal direction, and along with the first set of winding hairpins and the jumper, form a continuous electrical path between the phase lead and the neutral lead.

A winding arrangement for a stator of an electric motor includes winding hairpins arranged to form one or more phases. The stator includes a plurality of motor teeth forming a plurality of slots each configured to accommodate multiple layers. A first set of winding hairpins spanning of M slots are coupled in series and coupled to a phase lead, and are arranged sequentially in a first azimuthal direction. A jumper is arranged in a layer and is coupled in series with the first set of winding hairpins. A second set of winding hairpins configured to span of M slots are coupled in series between the jumper and a neutral lead. The second set of winding hairpins are arranged sequentially in the opposite azimuthal direction, and along with the first set of winding hairpins and the jumper, form a continuous electrical path between the phase lead and the neutral lead.

A modular DC motor includes a stator module having a stator core. The stator core has a ring-shaped base defining an axis and a plurality of stator posts protruding axially outward from the ring shaped based. A plurality of coils are wound around the stator posts. Each stator post extends axially beyond the corresponding coil. A shaft support is radially inward of the stator ring shaped base and is connected to the ring-shaped base. The shaft support is configured to support a rotor shaft relative to the stator core. The stator module is configured to receive one of a plurality of rotor modules. An operation of the modular DC motor is dependent on the physical configuration of the received one of the plurality of rotor modules. Each rotor module in the plurality of rotor modules has a distinct magnetic configuration from each other rotor module in the plurality of rotor modules.

A low height type actuator capable of performing a two-dimensional motion includes a magnet structure that includes a first array in which the first and second magnets are alternately arranged in x-direction and a second array in which the first and second magnets are alternately arranged in y-direction, and first and second wirings. The first wiring crosses the first magnets included in the first array in y-direction, and the second wiring crosses the first magnets included in the second array in x-direction. According to the present invention, by making current flow in the first and second wirings, a two-dimensional motion can be achieved. Further, since the first and second wirings are each a planar wiring that crosses the magnets, height reduction can be achieved.

A motor includes a rotor and stator. The stator includes a stator iron core having a substantially annular yoke, and a plurality of teeth extending from the yoke toward the rotor. Each tooth includes an extending portion with a winding wire wound in a concentrated manner to form a coil, and flange portions extending circumferentially from a tip end portion of the extending portion. The plurality of teeth include adjacent first second teeth with coils having identical phases, and adjacent third and fourth teeth with coils having different phases. A first magnetic resistance circumferentially from a tip end portion of the first flange portion to a center of the extending portion of the first tooth is higher than a second magnetic resistance circumferentially from a tip end portion of the second flange portion to a center of the extending portion of the third tooth.

An electric machine includes a plurality of printed layers arranged to form a stator having an outer periphery and teeth extending radially inward from the outer periphery. Each of the printed layers includes discrete portions of metal and discrete portions of insulation. The discrete portions of insulation define a contiguous network of insulative boundaries separating discrete cells formed by the discrete portions of the metal. A volume of the discrete cells within the outer periphery is greater than a volume of the discrete cells within the teeth such that a reluctance of the teeth is greater than a reluctance of the outer periphery.

An electric machine includes a plurality of printed layers arranged to form a stator having an outer periphery and teeth extending radially inward from the outer periphery. Each of the printed layers includes discrete portions of metal and discrete portions of insulation. The discrete portions of insulation define a contiguous network of insulative boundaries separating discrete cells formed by the discrete portions of the metal. A volume of the discrete cells within the outer periphery is greater than a volume of the discrete cells within the teeth such that a reluctance of the teeth is greater than a reluctance of the outer periphery.

A rotary electric machine comprises a two-pole rotor, a three-phase armature winding, and a stator core having fifty-four slots. An armature winding is stored as a top coil piece and a bottom coil piece in two layers in the slot of the stator core and has three parallel circuits and two phase belts per one phase. Each phase belt includes two parallel circuits. When a sequence of the first and second parallel circuits of one phase belt is viewed from a side closer to a phase belt center, those parallel circuits are arranged in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the top coil pieces and in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces. For a sequence of the second and third parallel circuits of the other the phase belt, those parallel circuits are arranged in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the top coil pieces and in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces.

A rotary electric machine comprises a two-pole rotor, a three-phase armature winding, and a stator core having fifty-four slots. An armature winding is stored as a top coil piece and a bottom coil piece in two layers in the slot of the stator core and has three parallel circuits and two phase belts per one phase. Each phase belt includes two parallel circuits. When a sequence of the first and second parallel circuits of one phase belt is viewed from a side closer to a phase belt center, those parallel circuits are arranged in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the top coil pieces and in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces. For a sequence of the second and third parallel circuits of the other the phase belt, those parallel circuits are arranged in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the top coil pieces and in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces.

A stator includes a stator core and a stator winding. An inner wall of the stator core is provided with M winding slots, the M winding slots are uniformly disposed in a circumferential direction of the inner wall of the stator core. The stator winding includes flat wire conductors inserted in the winding slots, N layers of flat wire conductors are disposed in any one of the winding slots, and phase units of a first-phase winding, phase units of a second-phase winding, and phase units of a third-phase winding are sequentially and periodically arranged along the inner wall of the stator core. Each phase winding includes P parallel branches. Any one of the parallel branches connects flat wire conductors of M.Math.N/3P layers.