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Rotating electrical machine

專利號
US11177721B2
公開日期
2021-11-16
申請人
HONDA MOTOR CO., LTD.（JP Tokyo）
發(fā)明人
Tadashi Yamaguchi; Takuro Kamada; Masahiko Mizuguchi; Kojiro Ohsaki
IPC分類
H02K1/32; H02K9/00; H02K1/22
技術領域
hole,rotor,path,flow,discharge,second,first,end,core,plate
地域： Tokyo

摘要

A rotating electrical machine includes a rotor and a stator. A first end plate includes a first refrigerant discharge hole which communicates with a second refrigerant flow path hole and supplies refrigerant to a first coil end and a first groove portion which supplies the refrigerant supplied from a refrigerant flow path to a first refrigerant flow path hole and does not supply the refrigerant to the first refrigerant discharge hole and the second refrigerant flow path hole. A second end plate includes a second refrigerant discharge hole which supplies the refrigerant to a second coil end and a second groove portion which supplies the refrigerant supplied from the first refrigerant flow path hole to the second refrigerant flow path hole and supplies the refrigerant to the second refrigerant discharge hole.

說明書

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CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority from Japanese Patent Application No. 2019-006058 filed on Jan. 17, 2019, the entire contents of which are incorporated herein by reference.

FIELD

The present invention relates to a rotating electrical machine.

BACKGROUND

With the recent increase in size of rotating electrical machines, the deterioration of the performance of rotating electrical machines due to heat generation of a magnetic pole portion can no longer be ignored and a method for efficiently cooling the magnetic pole portion is being sought. In JP-A-2018-33265, a rotor of a rotating electrical machine including a rotor core and a pair of end surface plates disposed on both end surfaces of the rotor core, in which refrigerant supplied from a rotor shaft is introduced into the rotor core through an annular groove formed in one end surface plate and is discharged from the other end surface plate through a through hole formed in the rotor core, has been disclosed. As a result, the rotor core can be cooled from the inside.

權利要求

1
The invention claimed is:1. A rotating electrical machine comprising a rotor and a stator arranged radially outside of the rotor, whereinthe rotor comprises:a rotor shaft including a refrigerant flow path inside of the rotor shaft;a rotor core including a rotor shaft hole through which the rotor shaft is inserted, a plurality of magnet insertion holes provided along a circumferential direction, and a first refrigerant flow path hole and a second refrigerant flow path hole penetrating in an axial direction;a plurality of magnetic pole portions constituted of magnets inserted into the magnet insertion holes;a first end plate arranged on a first axial end side of the rotor core; anda second end plate arranged on a second axial end side of the rotor core, opposite to the first axial end side;the stator comprises:a first coil end located radially outward of the first end plate; anda second coil end located radially outward of the second end plate,the first end plate comprises;a first refrigerant discharge hole communicating with the second refrigerant flow path hole; anda first groove portion which supplies refrigerant supplied from the refrigerant flow path to the first refrigerant flow path hole and does not supply the refrigerant to the first refrigerant discharge hole and the second refrigerant flow path hole, andthe second end plate comprises:a second refrigerant discharge hole; anda second groove portion which supplies the refrigerant supplied from the first refrigerant flow path hole to the second refrigerant flow path hole and supplies the refrigerant to the second refrigerant discharge hole.2. The rotating electrical machine according to claim 1, whereinan outer diameter side end portion of the second refrigerant flow path hole is located further on a radially outer side than an outermost diameter portion of the first refrigerant flow path hole.3. The rotating electrical machine according to claim 1, whereinthe first refrigerant discharge hole is provided to overlap the second refrigerant flow path hole in the circumferential direction,a plurality of the first refrigerant discharge holes and a plurality of the second refrigerant flow path holes are provided at equal intervals in the circumferential direction,a plurality of the second refrigerant discharge holes are provided at equal intervals in the circumferential direction,the first refrigerant discharge holes and the second refrigerant discharge holes are alternately arranged in the circumferential direction, andthe first refrigerant flow path holes are disposed between the first refrigerant discharge holes and the second refrigerant discharge holes in the circumferential direction.4. The rotating electrical machine according to claim 3, whereinthe rotor core further comprises third refrigerant flow path holes penetrating in the axial direction, andthe second refrigerant discharge holes are provided to overlap with the third refrigerant flow path holes in the circumferential direction.
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