Rotor of rotary electric machine and method for cooling rotary electric machine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakashi Matsumoto
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Abstract
A rotor of the rotary electric machine includes a rotor core, and a plurality of permanent magnets disposed in an inner part or an outer circumferential surface of the rotor core in a circumferential direction. In the rotor core, one or more first flow passages through which a cooling liquid flows, the one or more first flow passages extending in an axial direction and communicating with the outside of the rotor, and one or more second flow passages extending radially outward from the first flow passage and having closed distal ends, are formed.
Claims6
A rotor of a rotary electric machine comprising:
- a rotor core;
- and
- a plurality of permanent magnets disposed in an inner part or an outer circumferential surface of the rotor core in a circumferential direction,
- wherein, in the rotor core:
- one or more first flow passages through which a cooling liquid flows, the one or more first flow passages extending in an axial direction and communicating with the outside of the rotor are formed;
- and
- one or more second flow passages extending radially outward from the one or more first flow passages and having closed distal ends are formed.
A method for cooling a rotary electric machine including a rotor, a stator arranged concentrically with the rotor, and a rotary shaft fixed to a center of the rotor and rotating together with the rotor,
- wherein the rotor has a rotor core, and a plurality of permanent magnets arranged in an inner part or an outer circumferential surface of the rotor core in a circumferential direction,
- in the rotor core:
- one or more first flow passages through which a cooling liquid flows, the one or more first flow passages extending in an axial direction and communicating with the outside of the rotor are formed;
- and
- one or more second flow passages extending radially outward from the one or more first flow passages and having closed distal ends are formed, and
- the rotary electric machine is cooled by supplying the cooling liquid, which has a specific gravity smaller than foreign matter expected to be mixed into the cooling liquid, to the one or more first flow passages.
Dependencies are inferred from the claim text.