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Water cooling method and structure for traction electric machine

A traction motor and cooling structure technology, which is applied in the direction of cooling/ventilation devices, electrical components, electromechanical devices, etc., can solve problems such as space shortage, increase cooling equipment, increase motor operation and maintenance work and costs, and reduce costs and flow requirements small effect

Active Publication Date: 2007-03-28
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 4. Due to the relatively large thermal time constant, the thermal overload of the motor is relatively high
[0015] 5. It is necessary to install a water / air heat exchange device externally, which increases the cooling equipment and increases the maintenance work and cost of motor operation
[0028] However, both domestic and foreign water-cooled traction motors use a circular shell frame. This circular shape will make the space very tight for high-power-density motors with limited volume, which will affect the cooling effect.
Through experiments, it is found that it is not suitable to directly apply the existing motor water cooling technology to high power density motors, so it is necessary to further improve the cooling system of the motor to increase its heat dissipation capacity

Method used

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  • Water cooling method and structure for traction electric machine
  • Water cooling method and structure for traction electric machine

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A water-cooled structure for a traction motor. The heat dissipation of the traction motor is carried out through a four-channel cooling stator heat dissipation structure with an outer side and an inner circle. The four corners formed by the outer square outer wall form four cooling water channels arranged in a straight line in the axial direction, and are separated from each other by the ribs formed at the thinnest part of the inner ring of the machine base and the outer square outer shell, and then connected into a unit through connecting holes. The cooling circuit arranged in a roundabout way, the cooling of the traction motor is dissipated through the circulation of cooling water in the square roundabout water channel. The motor water-cooling structure includes a motor casing 3, a front end cover 18, and a rear end cover 20. The radial section of the motor base 2 is square on the outside and circular on the inside. And it matches the outer circle of the conventional ...

Embodiment 2

[0054] A traction motor water-cooled structure. The heat dissipation of the traction motor is carried out through a stator heat dissipation structure composed of a four-channel cooling stator cooling structure with an outer side and an inner circle, and an annular cooling water channel on the end cover to form a cooling circuit arranged in a circuitous manner. cooling. The motor case 3, the front end cover 18, the rear end cover 20, and the radial section of the motor base 2 are square outside and circular inside. In this way, the space can be fully utilized, and the installation size of the motor is small. And it matches the outer circle of the conventional iron core punching sheet, and the motor base uses the gap between the outer square and inner circle geometric figures to form four cavities as water storage chambers 6, 9, 11, 12, forming a motor casing 3 with cooling; Holes are directly opened on the motor casing 3 to communicate with the water storage cavity, that is, t...

Embodiment 3

[0057] The cooling method of the third embodiment is the same as that of the second embodiment, but in order to increase the contact surface between the water and the casing, which is beneficial to heat conduction, the water storage chambers 6, 9, 11 formed by the four corners of the motor casing 3 , 12, each water storage cavity can be decomposed into more than one smaller water storage cavity, and each sub-storage cavity is connected directly or in a roundabout way through the connecting hole to form a direct or roundabout cooling water channel .

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Abstract

Mode of water-cooling for stator is adopted in the invention. Stator frame is modified to cooling structure of four cooling water channels inside four corners formed by rotund inner wall and quadrate outer wall of stator frame so as to form four cooling water channels arranged along four axial directional straight lines. Ribs are formed at thinnest place between rotund inner wall and quadrate outer wall in order to partition four cooling water channels. Through connection holes, the said four cooling water channels are formed a cooling loop in roundabout mode. Besides the said cooling loop in roundabout mode, cooling water channels are prepared on two end plates. Partial water cooling channel on stator frame are connected to cooling water channels on end plates to form two pieces of branched roundabout cooling water loop so as to cool disclosed traction motor.

Description

technical field [0001] The invention relates to a cooling method of a traction motor, in particular to a water cooling method for a stator of a traction motor; the invention also relates to a cooling device structure of a traction motor, in particular to a water cooling device structure of a traction motor stator. Background technique [0002] Because the traction motor is limited by the space volume and weight, the motor adopts high electromagnetic load, the loss generated by the motor is relatively high, and the heat generation of the motor is serious, so the cooling system of the motor must be installed to improve its heat dissipation capacity. [0003] At present, the cooling methods of traction motors mainly include natural cooling, forced air cooling, self-ventilation, liquid-filled cooling, heat pipe cooling and water cooling, among which the water cooling method is more widely used for traction motors with relatively high power density, such as: low-floor cities Driv...

Claims

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Application Information

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IPC IPC(8): H02K9/19H02K5/20
Inventor 李华湘李意丰符敏利
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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