Anti-condensation motor

Abstract

The invention relates to an anti-condensation motor. A wire holder (4) is arranged between a junction box cavity (S1) and a winding working cavity (S2) so as to seal and isolate a junction box cavity(S1) and the winding working cavity (S2) from each other. The winding working cavity and the junction box cavity are isolated through the wire holder, so that air convection heat transfer between thecavities is prevented. The junction box and an end cover are isolated by a rubber sealing gasket to prevent contact heat transfer. Therefore, a large amount of heat generated by the winding during operation of the motor cannot be transmitted to the junction box cavity, large temperature difference cannot be generated between air in the junction box cavity and the junction box shell, meanwhile, under the action of a breathing plug, the relative humidity and pressure of the winding working cavity and the junction box cavity are guaranteed, and the condensation phenomenon of the motor is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of an anti-condensation structure of a water-cooled motor, in particular to an anti-condensation motor. Background technique [0002] Under the conditions of high humidity and low temperature in the external environment, after the motor stops running, it is easy to condense dew on the inner wall of the junction box cavity, resulting in a decrease in the insulation performance of the motor or even an internal short circuit; condensation falling inside the motor will corrode the internal metal parts of the motor, Seriously affect the performance of the motor, and may even burn the motor. Condensation inside the motor mostly occurs on the inner wall of the junction box shell and inside the box cover. The reason is that the interior of the water-cooled motor can be divided into a winding working cavity and a junction box cavity. Usually, the two are completely connected. When the motor is running, the winding i...

AI Technical Summary

Problems solved by technology

[0003] The anti-condensation measures that have appeared in the prior art include: 1) By spraying "three-proof" paint inside the junction box, the insulation performance of the motor can be improved, but the probability of condensation cannot be reduced, and the condensation problem has not been fundamentally solved; 2) Adding a desiccant inside the junction box can solve the condensation in a short time, but it needs to be replaced regularly. The replacement needs to remove the box cover, which brings hidden dangers to the performance of the motor and poor maintainability; 3) adding a dehumidification device requires a large installation space. The cost is high, and the reliability of the humidity and temperature sensors inside the device is not high; 4) Adding a heat insulation layer to the junction box cover can reduce the occurrence of condensation on the inner wall of the box cover, but the condensation phenomenon around the junction box cannot be effectively solved

[0004] The existing anti-condensation measure (CN110943568A) is to isolate the winding working cavity and the junction box cavity through the terminal connection assembly. The terminal connection assembly structure is composed of metal terminals, retaining rings, nylon fixing plates, and O-rings. The structure is relatively Complex, many parts, high processing cost, and the metal terminal should not be too large, otherwise the size of the nylon fixing plate will increase exponentially, and the installation space will be relatively large; this structure is more suitable for applications that do not require a high contact area of ​​the metal terminal Small current motors are limited by size and installation space, so the versatility is not strong

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