Abstract: A rotary electrical device includes a rotor having a hollow cylindrical shape or a solid cylindrical; and a stator having an annular shape and surrounding a rotation axis of the rotor. The stator includes a winding and a stator core constituted by a magnetic powder core. The stator core includes multiple cores facing each other with the winding interposed therebetween in an axial direction of the stator. One core of the multiple cores includes a yoke contacting another core, and one or more claw magnetic poles that protrude radially from the yoke toward the rotor. The one or more claw magnetic poles are alternately arranged with claw magnetic poles of the one other core. The yoke has a yoke surface parallel to the axial direction, contacting the other core.

Abstract: A motor 1 according to an embodiment of the present disclosure includes a rotor 10 configured to freely rotate around a rotation axis AX; and a stator 20 arranged inside the rotor 10 and including a stator unit 21 of a claw-pole type, the stator unit including a winding wire 212 that is annularly wound around the rotation axis AX and a stator core 211 provided so as to surround the winding wire, wherein the stator 20 includes an inner space 24A around the rotation axis AX and in communication with an outer side of the rotor 10, such that heat can be radiated to the inner space 24A.

Abstract: A magnetic refrigerator includes a plurality of magnetic working substances arranged at intervals in a circumferential direction, and a magnetic field application unit that causes a relative movement with respect to the magnetic working substances in the circumferential direction and applies a magnetic field to the magnetic working substances. The magnetic field application unit includes a first member spaced from the magnetic working substances in an axial direction, and first and second magnets that are arranged between the first member and the magnetic working substances and apply a magnetic field so that a magnetic flux flows in an in-plane direction of the magnetic working substances. The first and second magnets can move relative to the magnetic working substances in the circumferential direction. A refrigeration apparatus includes the magnetic refrigerator and a heating medium circuit to exchange heat with the magnetic refrigerator.

Abstract: A magnetic refrigerator includes a magnetic working substance, and a magnetic field application unit that causes a relative movement with respect to the magnetic working substance in a first direction and applies a magnetic field to the magnetic working substance. The magnetic field application unit includes magnetic poles arranged on one side of the magnetic working substance in a second direction orthogonal to the first direction, and spaced from each other in a third direction orthogonal to the first and second directions of the magnetic working substance. A refrigeration apparatus includes the magnetic refrigerator and a heating medium circuit to exchange heat with the magnetic refrigerator.

Abstract: A magnetic refrigerator includes a plurality of magnetic working substances arranged at predetermined first intervals in a first direction, and a magnetic field application unit that causes a relative movement with respect to the magnetic working substances in the first direction, and applies a magnetic field to the magnetic working substances. The magnetic field application unit includes one magnetic field generator, a first core provided closer to one magnetic pole of the magnetic field generator, and a second core provided closer to an other magnetic pole of the magnetic field generator. Three or more magnetic gaps are provided between the first core and the second core, and arranged at second intervals that are twice or more the first intervals in the first direction. A refrigeration apparatus includes the magnetic refrigerator and a heating medium circuit to exchange heat with the magnetic refrigerator.

Abstract: A rotary electrical device includes a rotor configured to be rotatable; and a stator disposed in a radial direction of the rotor to surround a rotation axis of the rotor. The stator includes a plurality of stator units that are stacked in an axial direction of the rotor. Each of the stator units includes a winding, a stator core that surrounds the winding, and one or more claw magnetic poles that protrude radially toward the rotor from each of two end portions in an axial direction of the stator core. The rotor includes a magnet that radially faces at least a portion of any of claw magnetic poles of the stator at a predetermined rotation position. At least one of magnet end portions in an axial direction of the magnet protrudes further in the axial direction than all of the claw magnetic poles of the stator.