Thermal Immersion Heating System and Technology of Stator Winding

Abstract

The invention discloses a stator winding hot-immersion and heating system and process. A control unit of the heating system acquires the overall temperature of a stator winding according to a direct voltage signal and a direct current signal at both ends of the stator winding and sends out a control signal according to the temperature, so that voltage input into the stator winding can be adjusted, thereby adjusting the temperature of the stator winding. According to the invention, the advantages of high control accuracy and smooth operation are achieved, and the temperature of the stator winding can be flexibly adjusted as required. The stator winding hot-immersion process solves the contradiction between permeability and adhesiveness of insulating paint, and the use of the heating system ensures that the stator winding impregnated in the paint can be quickly heated to a temperature higher than the gelation temperature of the insulating paint, thereby shortening the dropping time of the insulating paint and increasing the amount of the paint hung on the stator winding.

Description

technical field [0001] The invention relates to the technical field of motor stator winding manufacturing, in particular to a stator winding thermal immersion heating system and process. Background technique [0002] Motor stator windings are generally divided into two forms: hard winding and random winding. Hard winding, also known as forming coil, is a motor coil that is pressed into a fixed shape by electromagnetic flat wire; random winding refers to a stator coil that uses multiple strands of enamelled round wire and has a soft and unstable shape. Generally speaking, hard windings are mostly used for high-voltage motors or high-power low-voltage motors because of their high withstand voltage level and relatively reliable insulation performance; loose windings are mostly used for low-power low-voltage motors, and their insulation performance is not as reliable as hard windings. But it also has the advantages of low cost, simple production, and material saving. [0003] ...

AI Technical Summary

Problems solved by technology

Relatively speaking, the varnish impregnation of the stator of random winding motors is a difficult problem at present, especially for stator windings with large wire gauges. Due to the large gaps in the windings, the insulating varnish cannot be fixed and cannot meet the basic amount of varnish. Requirements, which severely limit the range of use of random winding stators

So, in the current process method, what factors affect the effect of dipping the stator of the random winding winding? There are mainly two problems that are difficult to solve

First, the viscosity requirements of the insulating varnish are contradictory, because if a high-viscosity insulating varnish is used, the permeability of the varnish will be poor, and it will be difficult to penetrate the motor stator when it is dipped in varnish. If the tension and adhesion are reduced, the insulating varnish will be easily lost; secondly, during the drying and curing process of the stator, the external heating method is adopted, and the heating speed is slow and the time is long. big

Relevant personnel in the industry have made a lot of efforts and explorations on this issue, but the results are not ideal or difficult to implement

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