Corona-resistant and high-frequency-impulse-resistant high-breathability little-resin mica tape suitable for variable-frequency high-voltage motors and preparation method thereof

A technology of less rubber mica tape and high-frequency pulses, which is applied in mica, electrical components, chemical instruments and methods, etc., can solve the problem that the rubber mica tape's corona resistance, high-frequency pulse resistance and heat resistance cannot meet the requirements of variable frequency motors. Voltage and insulation life requirements and other issues, to achieve the effect of high initial partial discharge voltage, excellent heat resistance, and long electrothermal aging life

Active Publication Date: 2014-01-01
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the corona resistance, high-frequency pulse resistance and heat resistance of this highly air-permeable and less-adhesive mica tape cannot meet the increasing voltage resistance and insulation life requirements of variable frequency motors.

Method used

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  • Corona-resistant and high-frequency-impulse-resistant high-breathability little-resin mica tape suitable for variable-frequency high-voltage motors and preparation method thereof
  • Corona-resistant and high-frequency-impulse-resistant high-breathability little-resin mica tape suitable for variable-frequency high-voltage motors and preparation method thereof
  • Corona-resistant and high-frequency-impulse-resistant high-breathability little-resin mica tape suitable for variable-frequency high-voltage motors and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a nano-hybrid mica tape with high air permeability and less rubber, and its preparation process is as follows:

[0044] (1) Preparation of nano-modified mica paper: In the muscovite flakes prepared by the water flushing method, add an aqueous dispersion of titanium oxide nanoparticles with a mass fraction of 5% and a particle size of about 200 nm; the mass fraction is 20 %, an aqueous dispersion of titanium oxide nanowires with a diameter of about 50 nanometers and a length of about 30 microns; an aqueous dispersion of boron nitride nanosheets with a mass fraction of 10%, a thickness of about 50 nanometers, and a diameter of about 10 microns After fully stirring evenly, it is copied on a mica paper machine to form a unit area of ​​160g / m 2 Nano-modified mica paper, the air permeability of the nano-modified mica paper is 285s / 100mL, the thickness is 0.098mm, and the nano-material content is 56g / m 2 .

[0045] (2) Preparation of nano-modified po...

Embodiment 2

[0049] This embodiment provides a nano-hybrid mica tape with high air permeability and less rubber, and its preparation process is as follows:

[0050] (1) Preparation of nano-modified mica paper: Add an ethanol dispersion of silicon oxide nanowires with a mass fraction of 20%, a diameter of about 50 nanometers, and a length of about 30 microns to the muscovite flakes prepared by the water flushing method The mass fraction is 10%, the thickness is about 50 nanometers, and the ethanol dispersion liquid of boron nitride nanosheets with a diameter of about 10 microns, after fully stirring, is copied on a mica paper machine to form a unit area gram weight of 160g / m 2 Nano-modified mica paper, the air permeability of the mica paper is 292s / 100mL, the thickness is 0.098mm, and the nanomaterial content is 48g / m 2 .

[0051] (2) Preparation of nano-modified powder resin adhesive: 300g of SiO with a particle size of about 120nm 2 Nanoparticles and 700g of epoxyimide resin particles w...

Embodiment 3

[0055] This embodiment provides a nano-hybrid mica tape with high air permeability and less rubber, and its preparation process is as follows:

[0056] (1) Preparation of nano-modified mica paper: Add an ethanol dispersion of silicon oxide nanoparticles with a mass fraction of 5% and a particle size of about 100 nm to the muscovite flakes prepared by the water flushing method; the mass fraction is 20 %, an ethanol dispersion of titanium oxide nanowires with a diameter of about 50 nanometers and a length of about 30 microns; a mass fraction of 15%, a thickness of about 100 nanometers, and an ethanol dispersion of boron nitride nanosheets with a diameter of about 30 microns , and fully stirred evenly, copied on the mica paper machine to form a unit area of ​​180g / m 2 Nano-modified mica paper, the air permeability of the mica paper is 245s / 100mL, the thickness is 0.112mm, and the nanomaterial content is 72g / m 2 .

[0057] (2) Preparation of nano-modified powder resin adhesive: ...

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Abstract

The invention relates to corona-resistant and high-frequency-impulse-resistant high-breathability little-rein mica tape which comprises a mica paper layer, a reinforcing material layer and an adhesion agent layer. The adhesion agent layer is formed by powder adhesion agents which are distributed in a dotted mode, and a large number of pore channels exist among the powder adhesion agents which are distributed in the dotted mode. The mica paper layer is formed by nano-modified mica paper, and the content of nanometer materials in the nano-modified mica paper is 20-100g / m<2>. The powder adhesion agents are nano-modified powder resin adhesion agents with the particle size ranging from 60 to 150 meshes and the melting temperature ranging from 60 to 160 DEG C, the content of nanometer materials in the nano-modified powder resin adhesion agents is 20wt%-50wt%, and the content of nanometer materials in the adhesion agent layer is 4-20g / m<2>. The mica tape is high in breathability, excellent in corona resistance and high-frequency impulse resistance performance and capable of prolonging the insulation life of variable-frequency (high-voltage) motors.

Description

technical field [0001] The invention belongs to the field of electrical insulating materials, and in particular relates to a corona-resistant, high-frequency pulse-resistant, highly air-permeable, less-adhesive mica tape suitable for variable-frequency high-voltage motors and a preparation method thereof. Background technique [0002] With the development of frequency conversion technology, it has also led to the rapid development of frequency conversion motors. Compared with ordinary motors, AC frequency conversion motors have the characteristics of simple structure, high operating efficiency, high precision, fast response, low noise and electromagnetic vibration. It is suitable for frequent starting, frequent speed regulation and braking, so it is more and more widely used in various industrial fields. [0003] However, the use of frequency converter in the frequency conversion drive system makes the insulation aging and damage of the frequency conversion motor quite diffe...

Claims

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Application Information

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IPC IPC(8): H01B17/60H01B3/04H01B19/00B32B19/06
Inventor 徐伟红王文王见知夏宇
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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