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Vehicle motor

A technology for electric motors and vehicles, applied in electric components, electromechanical devices, electrical components, etc., can solve problems such as residual air in cooling passages, reduction of cooling effect, deterioration, etc.

Inactive Publication Date: 2005-09-28
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the cooling device disclosed in the above-mentioned publication, the coolant flows from the upper portion to the lower portion of the motor having the rotating shaft extending in the horizontal direction, and in this case, air remains in the cooling passage.
In addition, in order to distribute the cooling liquid to all parts of the stator coil, it is necessary to set a rectifying vane in the cooling channel, which will make the structure complicated
Here, air bubbles are introduced into this cooling channel, and these air bubbles can rust and deteriorate the stator coils of the electric motor
In addition, due to the air bubbles, the coolant does not directly contact the stator coils, so the cooling effect will be reduced

Method used

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no. 1 example

[0035] The following will refer to figure 1 The configuration of the motor according to the present embodiment will be described. like figure 1 As shown, the electric motor 100 is mounted on a vehicle, and is used with its rotation axis extending in the horizontal direction. figure 1 A cross-sectional view and a side view of the electric motor 100 are shown. In general, the electric motor 100 is composed of a stator section and a rotor section. The stator section includes a stator core 106 having coils 104 wound in slots. The stator part is covered by a coil end cap 102 which surrounds the opposing end faces of the coils 104 and the stator core 106 in a cup-shaped manner.

[0036] The coil end cover 102 has a cooling oil inlet 130 at its lower part and a cooling oil outlet 140 at its upper part. The coil end cap 102 is in contact with the stator core 106 with an O-ring 108 interposed therebetween. The coil end caps 102 are connected to the stator core 106 by a prescribed...

no. 2 example

[0055] A motor and a cooling system for the motor according to a second embodiment of the present invention will be described below.

[0056] like Figure 5 As shown, in the motor cooling system according to this embodiment, a check valve 300 is provided at the cooling oil discharge port 140 in the motor cooling system according to the first embodiment. Since the configuration of the cooling system is otherwise the same as that of the cooling system according to the first embodiment described above, a detailed description thereof will not be repeated.

[0057] A check valve 300 is provided between the discharge line 164 and the cooling oil discharge port 140 so that oil can flow only in a direction from the electric motor to the discharge line 164 . Cooling oil cannot flow in the opposite direction.

[0058] The operation of the cooling system of the electric motor according to the present embodiment will be described below. When the oil pump 160 starts to operate and suppl...

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Abstract

A motor having a rotation shaft extending in a horizontal direction and efficiently cooling stator portion includes a cooling oil inlet provided in a lower portion of the motor in order to introduce the cooling oil supplied from an oil pump through a supply pipe, a coil end cover for immersing a stator portion of the motor in order to discharge the cooling oil from the motor, and a discharge pipe connected to the cooling oil discharge outlet for discharging the cooling oil to an oil pan.

Description

technical field [0001] The present invention relates to the construction of an electric motor (electric machine, motor), and more particularly to the construction of a liquid-cooled electric motor mounted on a vehicle such as an automobile. technical background [0002] A motor or generator mounted on a vehicle such as an automobile includes a rotating body (rotor) and a stator core disposed around the rotor and wound with a stator coil. The motor supplies current to the stator coils to obtain rotational force, and the generator gets current generated by the rotation of the rotor and flowing through the stator coils. When current flows through the stator coils during rotor rotation, the stator core or stator coils generate heat. A cooling device for suppressing this heat is disclosed, for example, in Japanese Patent Laid-Open No. 2001-145302. [0003] The cooling device is used as a cooling device for a motor mounted on a vehicle, the motor having a rotation shaft extendin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/24H02K9/197
CPCH02K3/24H02K9/197
Inventor 竹纲靖治胜敏明原田健司
Owner TOYOTA JIDOSHA KK