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Motor cooling device

A technology for cooling devices and motors, applied in cooling/ventilation devices, electromechanical devices, electric components, etc., which can solve the problems of longer cooling channels, difficulty in flowing necessary flow, and failure to obtain cooling effects

Active Publication Date: 2013-05-22
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the device described in JP2005-204496A, since the helical groove is formed to reciprocate between one end and the other end in the axial direction, the length of the cooling passage becomes longer.
As a result, the pressure loss increases, making it difficult to flow the necessary flow
Also, since the cooling liquid gradually heats up in the direction of flow, when the length of the cooling channel becomes longer, sufficient cooling effect cannot be obtained in the second half of the channel

Method used

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Embodiment Construction

[0012] Below, refer to figure 1 ˜ FIG. 4 describe an embodiment of the present invention. figure 1 It is a cross-sectional view schematically showing the structure of the motor M to which the motor cooling device according to the embodiment of the present invention is applied. This electric motor M has: a cylindrical stator 1; and a rotor (not shown) rotatably supported inside the stator 1 .

[0013] The stator 1 has: a stator core 11 formed by laminating thin-plate magnetic materials such as electromagnetic steel sheets; and a coil 12 wound on the stator core 11 in a concentrated or distributed manner. The stator core 11 and the coil 12 are mixed with heat conduction Resin 13 cover of the good material. The power line 14 is taken out from the end of the stator 1, and a driving current is supplied from the outside to the coil 12 through the power line 14, and a rotating magnetic field is formed around the rotor to rotate the rotor.

[0014] Since such a motor M generates he...

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Abstract

The device has coolant channels (PA1-PA3) provided in a mounting section that is provided between a cooling jacket (20) and a cooling housing (30). A cooling medium e.g. water, is provided between axial front sides of the mounting section. The channels comprise multiple of spiral shaped ducts, which extend from one of axial front surfaces to another axial front surfaces of the mounting section in a spiral shape in a circumferential direction. The ducts are arranged in a lateral manner adjacent to each other so that the ducts do not overlap in a mutual manner.

Description

technical field [0001] The present invention relates to a motor cooling device for cooling a motor using a flow of a cooling medium around the motor. Background technique [0002] Conventionally, there has been disclosed a device for cooling a motor by enclosing the outer peripheral portion of a stator core with a cylindrical case and forming a cooling passage through which a cooling fluid flows on the inner peripheral surface of the case. In the device described in Japanese Unexamined Patent Application Publication No. 2005-204496 (JP 2005-204496A), a helical groove is formed on the inner peripheral surface of the casing as a cooling passage continuously from one end to the other end in the axial direction. [0003] However, in the device described in JP2005-204496A, since the helical groove is formed to reciprocate between one end portion and the other end portion in the axial direction, the length of the cooling passage becomes long. As a result, the pressure loss increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K9/19
CPCH02K1/20H02K5/20H02K5/203
Inventor 前田尚志有松洋平河合健司
Owner FANUC LTD