Motor stator cooling structure based on low-temperature co-melt solid-liquid phase change heat absorption

Abstract

The invention discloses a motor stator cooling structure based on low-temperature co-melt solid-liquid phase change heat absorption. The motor stator cooling structure comprises a stator core, whereinthe end part of the stator core is provided with a stator slot; a stator coil is mounted in the stator slot; a cavity is formed in the stator core; the outer circumferential face and the bottom of the stator slot are both located in the cavity; the cavity is filled with low-temperature co-melt; the cooling structure can effectively solve the problem that the temperature of the motor stator suddenly rises under the working condition of frequent starting and stopping of the motor, the cooling effect is good, and the efficiency of the motor cannot be reduced.

Description

technical field [0001] The invention relates to a motor stator cooling structure, in particular to a motor stator cooling structure based on low-temperature eutectic solid-liquid phase transition to absorb heat. Background technique [0002] The motor is a device that converts or transmits electrical energy according to the law of electromagnetic induction. Its main function is to convert electrical energy into mechanical energy to generate drive torque. During the operation of the motor, a variety of heat losses will inevitably occur, which will increase the temperature of the motor, reduce its performance, and shorten its life. The heat loss of the stator is a very important item in the heat loss of the motor. At present, the stator of most motors is cooled by ventilation and heat dissipation, that is, the fan is used to force the air to circulate for cooling. However, due to the low specific heat of the air, unpredictable backflow, vortex and other problems are prone to ...

AI Technical Summary

Problems solved by technology

However, there are two defects in this technology at present: on the one hand, paraffin was basically used as the phase change working fluid in the past.

Paraffin wax is flammable, and it needs to add graphite powder and stir continuously in liquid state to obtain sufficient thermal conductivity. After graphite precipitation, paraffin wax can hardly absorb heat; since paraffin wax is an amorphous mixture, its temperature will change during the phase transition process. If the temperature continues to rise, the temperature difference between the inside and outside of the cavity will become smaller, which will affect the cooling effect; on the other hand, the position of the cavity is set on the stator yoke, which will generate a huge magnetic resistance and cause additional heat loss. Not only is it difficult to achieve the cooling effect, It also seriously reduces the efficiency of the motor

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