In a wheel drive apparatus, a clutch is configured to switch a coupling mode between a first rotating shaft of a first rotating electrical machine and a second rotating shaft of a second rotating electrical machine to any one of (i) a power transmission mode in which power transmission is enabled between the first rotating shaft and the second rotating shaft; and (ii) a power interruption mode in which power transmission is interrupted between the first rotating shaft and the second rotating shaft.

A rotor for an electric machine is disclosed herein. The rotor is configured to rotate about a rotation axis. The rotor comprises: a rotor drum and a hub. The rotor drum supports an array of permanent magnets thereon and the rotor drum having a longitudinal axis coaxial with the rotation axis. The hub is nested within the rotor drum for supporting the rotor drum and the hub being coaxial with the rotor drum and coupled thereto. The magnets in the array are arranged to provide a Halbach array comprising a series of alternating polarity permanent magnets separated by pusher permanent magnets therebetween.

A device or part thereof, comprising specifically located concentrations of material originating from magnetic particles, thereby integrating magnetic field interactive capabilities, combined or integrated in specific configurations with a different primarily metallic material, corresponding to suitable structurally analyzed criteria, thereby creating a structural load bearing device or part thereof, with magnetic field interactive capabilities.

An outside field system section and an inside field system section are provided to a stator of an electric motor to form a field system, with the outside field system section and the inside field system section formed in a substantially tube shape with permanent magnets arrayed in a circumferential direction while changing magnetization directions according to a division number n, wherein the division number n is an integer of 3 or more. A tube body employing a ferromagnetic material is disposed between the outside field system section and the inside field system section, with coils attached to the tube body. Coils in the electric motor are accordingly able to be efficiently cooled through the tube body.

An outside field system section and an inside field system section are provided to a stator of an electric motor to form a field system, with the outside field system section and the inside field system section formed in a substantially tube shape with permanent magnets arrayed in a circumferential direction while changing magnetization directions according to a division number n, wherein the division number n is an integer of 3 or more. A tube body employing a ferromagnetic material is disposed between the outside field system section and the inside field system section, with coils attached to the tube body. Coils in the electric motor are accordingly able to be efficiently cooled through the tube body.

A motor according to the present disclosure includes a rotor. The rotor includes a plurality of first magnets arranged in a Halbach arrangement in a circumferential direction of the rotor, and a second magnet. The plurality of first magnets and the second magnets are arranged alternately and adjacent to each other. The second magnet is longer in the circumferential direction of the rotor as compared to the first magnet. The first magnet and the second magnet have a substantially trapezoidal shape when viewed from the rotation axis direction of the rotor.

A motor according to the present disclosure includes a rotor. The rotor includes a plurality of first magnets arranged in a Halbach arrangement in a circumferential direction of the rotor, and a second magnet. The plurality of first magnets and the second magnets are arranged alternately and adjacent to each other. The second magnet is longer in the circumferential direction of the rotor as compared to the first magnet. The first magnet and the second magnet have a substantially trapezoidal shape when viewed from the rotation axis direction of the rotor.

A rotating electrical machine armature winding includes conductor portions arranged circumferentially away from each other and face a magnet unit. The conductor portions have no inter-conductor members circumferentially disposed therebetween. Each conductor portion includes wire segments of the conductor wire member arranged in circumferentially and radially arranged rows. The conductor portions include a first conductor portion and a second conductor portion which are arranged adjacent to each other in the circumferential direction as a pair and belong to the same phase. The first conductor portion includes the wire segments of the conductor wire member which are arranged asymmetrically with those of the second conductor portion in the circumferential direction. The magnet unit includes magnet which have major magnetic pole faces. Each of the major magnetic pole faces is shaped to have a major magnetic pole angle is selected to be less than or equal to an inter-conductor angle.

This disclosure describes a magnetically geared apparatus that is configured either as an electric motor or as a generator. The apparatus includes at least a stator structure and a rotor structure arranged in a manner to improve torque generation. The stator structure contains N1 stator cores and a shared toroidal electrical winding, and the rotor structure contains an equal number of corresponding rotor cores. The apparatus may be a Vernier machine. The apparatus may include one or more thermal channels configured to transport heat out of the stator structure. Methods and systems for manufacturing the apparatus are also described.

Magnetic arrays and related systems. An example array for a machine contains a plurality of discrete magnetic segments. When the segments are spaced away from influence of ferromagnetic material, such as prior to placement in the array, each includes a pole having the same maximum field strength. When the segments are (i) formed in a sequence along a circumferential array with rotated fields along the array, and (ii) with each positioned in sufficient proximity to the next segment in the sequence for the fields to interact with one another, flux channeling can be effected similar to that observed with a Halbach array. In different embodiments of the invention, for flux channeling to occur the segments may be in physical contact with one another or spaced-apart while in sufficiently close proximity that the fields between segments next to one another in the array interact to effect flux channeling.