Method of manufacturing magnet, method of manufacturing rotor, magnet, and rotor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKenta TAKESHIMA
Life of this patent
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Abstract
A sheet-shaped insulating member including a thermoplastic resin fiber and an inorganic fiber is arranged on a surface of a magnet body. The insulating member is compressed while being heated to a temperature higher than or equal to a glass transition temperature of the thermoplastic resin fiber, so that the insulating member is thermocompression-bonded to the magnet body in a state in which the inorganic fiber is elastically compressed. A magnet is thus formed. With the magnet arranged in a slot of a rotor core, the magnet is heated to a temperature higher than or equal to the glass transition temperature of the thermoplastic resin fiber. This causes the inorganic fiber to restore elasticity, so that the magnet is fixed to the rotor core.
Claims5
A method of manufacturing a magnet, the magnet including a magnet body having a surface covered with an insulating member, the method comprising:
- an arrangement step that arranges, on the surface of the magnet body, the sheet-shaped insulating member including a thermoplastic resin fiber and an inorganic fiber;
- and
- a thermocompression step that compresses the insulating member while heating the insulating member to a temperature higher than or equal to a glass transition temperature of the thermoplastic resin fiber, thereby thermocompression-bonding the insulating member to the magnet body in a state in which the inorganic fiber is elastically compressed.
A method of manufacturing a rotor, wherein
- the rotor includes:
- a rotor core having a slot;
- and
- a magnet that is arranged in the slot and includes a magnet body having a surface covered with an insulating member,
- the method comprising:
- an arrangement step that arranges, on the surface of the magnet body, the sheet-shaped insulating member including a thermoplastic resin fiber and an inorganic fiber;
- a thermocompression step that compresses the insulating member while heating the insulating member to a temperature higher than or equal to a glass transition temperature of the thermoplastic resin fiber, thereby thermocompression-bonding the insulating member to the magnet body in a state in which the inorganic fiber is elastically compressed, so as to form the magnet;
- and
- a fixing step that heats the magnet arranged in the slot to a temperature higher than or equal to the glass transition temperature, thereby restoring elasticity of the inorganic fiber, so as to fix the magnet to the rotor core.
A magnet, comprising:
- a magnet body;
- and
- a sheet-shaped insulating member including a thermoplastic resin fiber and an inorganic fiber, the insulating members covering a surface of the magnet body,
- wherein the inorganic fiber is elastically compressed.
A rotor, comprising:
- a rotor core having a slot;
- and
- a magnet that is arranged in the slot and includes a magnet body having a surface covered with an insulating member, wherein
- the insulating member includes a thermoplastic resin fiber and an inorganic fiber, and is sheet-shaped, and
- the magnet is fixed to the rotor core in a state in which the insulating member is in contact with an inner surface of the slot.
Dependencies are inferred from the claim text.