A motor stator cooling and insulation structure

A motor stator and insulation structure technology, applied in the shape/style/structure of winding insulation, cooling/ventilation device, shape/style/structure of winding conductors, etc., can solve the poor cooling effect of the central part of the armature and the energy of the motor Loss and efficiency reduction, motor energy loss and other issues, to achieve the effect of reducing the axial insulation distance, saving layout space, and achieving consistency

Pending Publication Date: 2019-07-02
BORGWARNER POWERDRIVE SYST (TIANJIN) CO CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The motor will generate a lot of heat when it works for a long time, and the heat must be taken away in time, otherwise the temperature will exceed the heat resistance level of the copper wire of the motor, which will affect the efficiency and service life of the motor in the slightest, or burn the motor and cause accidents
[0003] In the prior art, there are three main cooling methods for motors: air cooling, water cooling, and oil cooling. The oil cooling method has attracted more and more attention because of its high heat dissipation efficiency. There are two main ways for oil cooling: one is oil-immersed Cooling the motor, the other is the oil-spray cooling motor. For the oil-immersed cooling motor, this cooling method has three main defects: First, the stirring of the cooling oil when the rotor rotates will cause the loss of motor energy and the reduction of efficiency, especially The loss is greater at high speeds; secondly, the cooling oil can basically only cool the end of the armature, and the cooling effect on the central part of the armature is relatively poor; finally, this method of heat dissipation does not have a heat exchange system, and the oil temperature will rise with the motor Too fast, which significantly reduces the overall cooling effect of the motor
[0004] For the oil-sprayed cooling motor, it is based on the oil-immersed type, and an oil storage tank is installed in the lower part of the machine casing. One end of the oil pipe is connected to the oil injection port on the end cover, and the other end is connected to the oil storage tank through the oil pump. The oil storage tank is connected with the motor housing through the oil return port, and the oil pipe and the oil storage tank store cooling oil. When in use, the cooling oil is transported from the oil storage tank to the end covers at both ends of the motor housing through the oil pump, and sprayed from the nozzle to The part of the motor that needs to be cooled is driven by gravity and the cooling oil returns to the oil storage tank through the oil return port. Compared with the oil-immersed cooling motor, this way of cooling increases the heat exchange cooling system, which is better than the oil-immersed motor, but The stirring of the cooling oil by the rotor when it rotates will cause energy loss and efficiency reduction of the motor, especially at high speeds, and for the stationary stator, especially the stator winding, the cooling oil cannot penetrate evenly into each motor. Therefore, the heat dissipation efficiency of the copper wires in each part of the stator winding cannot be guaranteed to be consistent, which is not conducive to the overall performance of the motor

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  • A motor stator cooling and insulation structure
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Embodiment Construction

[0016] The concrete implementation method of the present invention is as follows:

[0017] The existing oil-cooled motors are mainly divided into two types: oil-immersed cooling motors and oil-sprayed cooling motors. For oil-sprayed cooling motors, it is based on the oil-immersed type and is installed on the lower part of the casing. An oil storage tank, one end of the oil pipe is connected to the oil injection port on the end cover, the other end is connected to the oil storage tank through the oil pump, the oil storage tank is connected to the motor casing through the oil return port, and cooling oil is stored in the oil pipe and the oil storage tank. At the same time, the cooling oil is transported from the oil storage tank to the end caps at both ends of the motor casing through the oil pump, sprayed from the nozzle to the part that needs to be cooled in the motor, and finally the cooling oil returns to the oil storage tank through the oil return port due to the action of g...

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Abstract

The invention discloses a motor stator cooling and insulation structure. A motor stator includes a stator winding and a stator iron core. The stator winding is composed of multiple copper wires. The stator winding is characterized in that the two ends of the stator winding are provided with oil covers, which are a first oil cover and a second oil cover, matching the stator winding, the first oil cover and the second oil cover sleeve the ends of the stator winding, and cooling oil is arranged between the stator winding and the first oil cover and between the stator and the second oil cover. Through the arrangement of the first oil cover and the second oil cover, the cooling oil is stored between the stator winding and the first oil cover and between the stator and the second oil cover, andthe copper wires of the stator winding are immersed in the cooling oil, which ensures the consistency of temperature of the cooper wires, enhances the insulation performance of the stator ends and a casing and improves the overall performance of a motor during operation.

Description

technical field [0001] The invention relates to a motor stator structure, in particular to a winding cooling and insulation structure of the motor stator. Background technique [0002] The motor will generate a lot of heat when it works for a long time, and the heat must be taken away in time, otherwise the temperature will exceed the heat resistance level of the copper wire of the motor, which will affect the efficiency and service life of the motor at least, or burn the motor and cause accidents. [0003] In the prior art, there are three main cooling methods for motors: air cooling, water cooling, and oil cooling. The oil cooling method has attracted more and more attention because of its high heat dissipation efficiency. There are two main ways for oil cooling: one is oil-immersed Cooling the motor, the other is the oil-spray cooling motor. For the oil-immersed cooling motor, this cooling method has three main defects: First, the stirring of the cooling oil when the roto...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H02K3/24H02K3/38H02K9/193
CPCH02K3/24H02K3/38H02K9/193
Inventor孔昭松
OwnerBORGWARNER POWERDRIVE SYST (TIANJIN) CO CHINA