Water cooling structure in stator slot and manufacturing method thereof

Abstract

The invention relates to the field of motor design, in particular to a water cooling structure in a stator slot and a manufacturing method thereof, a pipeline made of a water-soluble material is arranged in a gap of a winding in the stator slot of a motor, the gap in the stator slot, a slot opening space and end windings on two sides are all encapsulated, and an end encapsulation area is provided with a cooling medium inlet and a cooling medium outlet. And the water-soluble material can be dissolved by introducing water after the whole encapsulation is finished, so that a required water-cooling pipeline is formed. Water channels are formed in the stator groove through pouring sealants and water-soluble materials, and the windings in the stator groove and the end portions of the two sides of the stator groove are completely wrapped by the pouring sealants. And after the pouring sealants are cured, water is introduced to fully dissolve the water-soluble material. The water channel is arranged in the space in the groove, and the end winding and the groove are completely sealed by using the pouring sealant. According to the water-cooling structure and the manufacturing method, the external size of the motor is not increased, and meanwhile, the water-cooling structure has an excellent cooling effect. Therefore, the electromagnetic load, the torque density and the power density of the motor can be further improved.

Description

technical field [0001] The invention relates to the field of motor design, in particular to a water cooling structure in a stator slot and a manufacturing method thereof. Background technique [0002] In recent years, the rapid development of more electric aircraft, electric vehicles and other fields has put forward higher requirements for the power density and safe operation of the motors used. Compared with conventional motors, high power density motors have higher electromagnetic loads, smaller heat dissipation areas, and greater loss per unit volume. Therefore, a reasonable cooling system needs to be designed to ensure the efficient and safe operation of the motor. A good cooling system can ensure that the temperature rise of key components such as windings, iron cores, and magnetic steel is reasonable during the operation of the motor, and ensure the operating life of the motor. Therefore, efficient cooling methods have a crucial impact on the safe and stable operatio...

AI Technical Summary

Problems solved by technology

However, the composition of stator end windings and stator slots is complex, and there are heat conductors with huge differences in thermal conductivity and significant differences in volume and size, such as copper wires, impregnated varnishes, polyimide insulation layers, and air.

Therefore, when the water cooling method is adopted, the temperature of the end winding will be high and the local temperature rise in the stator slot will be too high, which will seriously affect the safe operation of the motor

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