Insulating method and device of oil pump motor stator of electric locomotive transformer powered up by frequency converter

Abstract

The invention relates to insulating method and device of an oil pump motor stator of an electric locomotive transformer powered up by a frequency converter. An electromagnetic wire with a polyimide hybridized nano material insulating layer is adopted to manufacture a stator winding, and a stator adopts a random single-layer winding structure; an NHN (nickel hydrazine nitrate) composite foil with the capacity of resisting corona is adopted to carry out isolation and insulation treatment in a stator insulating groove, ground insulation and phase to phase insulation; then a motor stator is placed in a vacuum container containing a TJ1158H level solvent-free immersion paint, and an inorganic nano material (such as an aluminum oxide derivative with a grain size of 50-100 nanometers) accountingfor 3-5 percent of the total quantity of the immersion paint is added to the solvent-free immersion paint; and integral-immersion and drying treatment is carried out by utilizing a vacuum pressure integral-immersion (also known as V.P.I) insulating treatment technology. A hard corona resistant paint film is formed on the surface of the motor after the motor stator is subjected to the integral-immersion treatment, and after the motor is finally assembled, cleaned and arranged on the transformer, high vacuum evacuation treatment is carried out on the transformer, wherein the vacuum degree is the pressure of 1*10-5 to 1*15-6 milli Hg; and after a required vacuum degree is reached, transformer oil is filled.

Description

technical field [0001] The invention relates to a transformer component insulation method and device structure, in particular to an electric locomotive transformer oil pump motor stator insulation method and device structure powered by a frequency converter, which is mainly used for the insulation of transformer oil pump motor stators of various electric locomotives. Background technique [0002] For electric locomotive transformer oil pump motors, although the coils and other parts of the motors have certain insulation capabilities when they are made into stators and rotors, for example, enameled wires are insulated between turns by varnish film; there are grooves in the iron core grooves, etc. However, a thin layer of paint film on the enameled wire is used as the inter-turn insulation of the wire, which is very weak and vulnerable to damage, and the enameled wire, slot insulation, and slot wedge move with each other. When the motor starts and stops, the insulating material...

AI Technical Summary

Problems solved by technology

The continuity and integrity of the insulation between the stator coils of the motor manufactured in this way are poor, the dielectric strength is low, and the dielectric loss is high.

Motor operation reliability is poor, and production efficiency is low, so further improvement is required

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