Axial gap motor, compressor, motor system, and power generator
An axial gap motor includes a stator having stator teeth, and also includes a rotor opposed to the stator with a gap in an axial direction of the stator. Each of the stator teeth includes a stator tooth body, a stator tooth end joined to at least one axial-direction end of the stator tooth body, and a stator coil disposed around the stator tooth body. The stator tooth body includes a wound core comprised of a multi-layered amorphous foil strip winding. The stator tooth end is formed by a compact including a powder magnetic core, and the stator tooth end includes a surface opposed to the rotor. A cross-sectional area of the stator tooth end perpendicular to an axis of the amorphous foil strip winding is larger than a cross-sectional area of the stator tooth body perpendicular to the axis of the amorphous foil strip winding.
1. An axial gap motor comprising:
a stator including a stator tooth; and
a rotor being opposed to the stator with a gap in the axial direction of the stator;
wherein the stator tooth includes at least two parts, each of the at least two parts made of a material different from another of the at least two parts;
wherein the stator tooth includes: a stator tooth body, a stator tooth end joined to at least one axial-direction end of the stator tooth body, and a stator coil disposed around the stator tooth body;
wherein the stator tooth body is formed by a compact including a powder magnetic core;
wherein the stator tooth end includes a surface opposed to the rotor;
wherein a portion of the stator tooth end including the surface opposed is formed by disposing a wound core comprised of a multi-layered amorphous foil strip winding;
wherein a portion of the stator tooth end joined to the stator tooth body is formed by a compact including a powder magnetic core; and
wherein a cross-sectional area of the stator tooth end perpendicular to an axis of the amorphous foil strip winding is larger than a cross-sectional area of the stator tooth body perpendicular to the axis of the amorphous foil strip winding.
2. The axial gap motor according to claim 1 , wherein the portion of the stator tooth end is formed by the compact including the powder magnetic core; and
wherein the cross-sectional area of the portion of the stator tooth end increases in a direction from a protruding mating part, for joining the stator tooth end to the stator tooth body, toward the opposed surface.
3. The axial gap motor according to claim 1 , wherein the wound core includes an insulating layer between layers of the amorphous foil strip winding.
4. The axial gap motor according to claim 1 , wherein the stator tooth end includes a protruding mating part, for disposing the wound core.
5. The axial gap motor according to claim 1 , wherein a joint between the stator tooth end and the stator tooth body has a tapered shape or a fillet shape.
6. The axial gap motor according to claim 1 , wherein the stator tooth body, the stator tooth end, and the stator coil are fixed with molding resin.
7. The axial gap motor according to claim 1 , wherein the wound core is circular, polygonal, oval, or substantially circular in shape.
8. The axial gap motor according to claim 1 , wherein the amorphous foil strip winding is includes an iron-based or cobalt-based amorphous alloy.
9. A compressor for an air conditioner including the axial gap motor according to claim 1 .
10. A motor system for driving an automobile including the axial gap motor according to claim 1 .
11. A power generator for wind power generation including the axial gap motor according to claim 1 .
12. An axial gap motor comprising:
a stator, including a stator tooth, the stator tooth including:
a stator tooth body, the stator tooth body being formed by a compact including a powder magnetic core,
a stator tooth end, joined to at least one axial-direction end of the stator tooth body, the stator tooth end including a surface opposed to the rotor, such that a portion of the stator tooth end including the surface opposed to the rotor is formed by disposing a wound core comprised of a multi-layered amorphous foil strip winding, a portion of the stator tooth end being joined to the stator tooth body, and
a stator coil, disposed around the stator tooth body; and a rotor, being opposed to the stator with a gap in the axial direction of the stator;
wherein a cross-sectional area of the stator tooth end perpendicular to an axis of the amorphous foil strip winding is larger than a cross-sectional area of the stator tooth body perpendicular to the axis of the amorphous foil strip winding.
13. The axial gap motor according to claim 12 ,
wherein the wound core is circular, polygonal, oval, or substantially circular in shape.
14. The axial gap motor according to claim 12 ,
wherein the amorphous foil strip winding is includes an iron-based or cobalt-based amorphous alloy.