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Rotary electric machine

A technology for rotating electric machines and rotor cores, which is applied in the direction of electromechanical devices, electrical components, electric components, etc., and can solve problems such as poor slot cooling efficiency, reduced coil occupancy, and complicated manufacturing processes

Active Publication Date: 2019-09-24
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the method of cooling by supplying refrigerant to the outside of the stator core or the coil ends, the cooling efficiency of the inside of the slot is not good.
[0008] In addition, in the cooling method described in Patent Document 2, there is a problem that the manufacturing process of the rotating electric machine is complicated by inserting the heat pipe into the coil bundle layer, thereby increasing the manufacturing cost.
In addition, considering the size that can realize the heat transfer function of the heat pipe, the coil occupancy rate in the slot is significantly reduced

Method used

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  • Rotary electric machine
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Examples

Experimental program
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Embodiment Construction

[0046] Hereinafter, an embodiment of a rotating electrical machine according to the present invention will be described with reference to the drawings.

[0047] Such as figure 1 As shown, the rotating electric machine 10 according to the present embodiment includes a rotor 20 , a rotor shaft 30 integrally rotating with the rotor 20 , and a stator 80 disposed on the outer peripheral side of the rotor 20 with a predetermined gap therebetween.

[0048] On the inner side of the rotor shaft 30, a refrigerant flow path 31 through which the refrigerant flows is formed. The refrigerant flow path 31 extends in the axial direction inside the rotor shaft 30 and is configured to be able to be supplied with refrigerant from the outside. As the refrigerant, for example, ATF (Automatic Transmission Fluid) is used, and a supply path is formed so that ATF circulates through the transmission case and the motor case.

[0049] In addition, on the rotor shaft 30 , two refrigerant supply portions...

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Abstract

The present invention provides a rotary electric machine capable of appropriately cooling a coil disposed inside a slot. The rotary electric machine (10) includes a stator (80) including a stator core (81) and a coil (82), a rotor (20) disposed opposite the stator (80), and a rotor shaft (30), and the rotor (20) rotates integrally. An opening (86) of each slot (85) is formed on an inner circumferential surface of the stator core (81), and a refrigerant flow path (31) to which a refrigerant is supplied is provided in the rotor shaft (30); and a refrigerant supply unit (32) that supplies a refrigerant to the rotor core (40). A flow path (62) is formed in the rotor core (40), one end of the flow path (62) is connected to the refrigerant supply portion (32), and the other end portion is opposite to the opening portion (86) of the stator (80).

Description

technical field [0001] The present invention relates to a rotating electrical machine mounted on an electric vehicle or the like. Background technique [0002] The stator of the rotating electrical machine includes a stator core and a coil attached to the stator core. In order to increase the output of a rotating electrical machine, it is necessary to cool a coil that is a heat generation source. [0003] Conventionally, as a cooling method for a rotating electric machine, a method of supplying a refrigerant such as water or oil to the outside of the stator core or to the coil ends for cooling has been widely used. In addition, a method has been proposed in which a plate-shaped heat pipe is arranged in a coil bundle layer inserted into a slot, and the inside of the slot is cooled by heat transfer in the heat pipe (see Patent Document 2). [0004] prior art literature [0005] Patent Document 1: Japanese Patent Laid-Open No. 2006-211779 [0006] Patent Document 2: Japanes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/32H02K1/16H02K9/00
CPCH02K1/165H02K1/32H02K9/00
Inventor 吉泉裕介井上雅志
Owner HONDA MOTOR CO LTD