High thermal conductivity insulating winding tape and preparation method thereof

Abstract

The invention relates to high-thermal-conductivity insulation winding belts. The high-thermal-conductivity insulation winding belts include single-surface type, double-surface type and three-in-one type high-thermal-conductivity insulation winding belts and are formed by high-thermal-conductivity mica powder paper layers, reinforced material layers and high-thermal-conductivity composite insulation glue layers through composite pressing, wherein a reinforced material adopts alkali-free glass fibers, alkali-free glass cloth and a film; high-thermal-conductivity mica powder paper is prepared from materials in parts by weight as follows: 70-75 parts of mica flakes and 20-30 parts of aluminum nitride. The high-thermal-conductivity insulation winding belts prepared with the method are insulated, have good thermal conducting and heat transferring performance and the characteristics of avoidance of layering and inverted sticking, high flexibility at the room temperature and the like, are easy to wind, eliminate flying powder and adhesion phenomena in a winding process, and have better appearance quality and uniform surfaces after winding curing as well as excellent electrical insulation performance.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, in particular to a high thermal conductivity insulating winding tape used for a stator coil of a high-voltage motor and a preparation method thereof. Background technique [0002] With the continuous development of motors in the direction of high voltage, large capacity, stable operation and environmental protection, new requirements are put forward for the insulation structure of high-voltage motors: thinning the insulation structure, reducing temperature rise, and increasing the design power of the whole machine. This requires insulation materials in motors to have better electrical insulation and thermal conductivity. In the operation of ordinary high-power motors, the mica tape used in the motor insulation material does not have high thermal conductivity characteristics, and as a thermal barrier, it will prevent heat from radiating to the iron core and cooling medium, and the the...

AI Technical Summary

Problems solved by technology

At present, the adhesive used in domestic mica tape with less rubber powder is usually epoxy resin, but its heat resistance is low, and, under the premise of ensuring the stable and reliable quality of motor products, its cost is relatively high, so the reduction of motor products Lack of market competitiveness in terms of manufacturing costs