High-resistance corona-proof belt, and preparation method and application thereof

An anti-corona, high resistance technology, applied in nanotechnology for materials and surface science, winding insulation materials, winding insulation shape/style/structure, etc., can solve the problem that the coating amount cannot be accurately and uniformly distributed and changed The problems of high coating amount and adjustment cost, and high requirements for the cleanliness of the coating environment can achieve the effect of small effective mass, special energy band structure, and no stress and deformation.

Active Publication Date: 2017-05-17
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned anti-corona belt is used for high-voltage motors. After the motor stator is installed, the corona voltage (corona onset voltage) generated by the motor stator windings is low, which may easily cause breakdown of the anti-corona layer along the surface and affect the operation of the motor.
[0005] The wet coating technology used in the above preparation method has the following disadvantages: high cost of changing coating amount and adjustment, few adjustable mechanisms, inability to accurately and evenly distribute the coating amount, and difficult cleaning of solvent-based coating liquid, especially It is to clean the high-precision feeding system pipeline and the seam adjustment coating chamber, which has poor operability, high requirements on the cleanliness of the coating environment, and insufficient environmental protection.

Method used

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  • High-resistance corona-proof belt, and preparation method and application thereof

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Effect test

Embodiment 1

[0043] This embodiment provides a high-resistance anti-corona belt for a high-voltage motor, which is prepared by the following steps:

[0044] (1) Unwinding of the base material, using 0.10±0.02mm×25mm electrical non-alkali glass silk braid;

[0045] (2) The homogeneous precipitation method is used to prepare low-dimensional structure semiconductor materials, that is, ZnO nanomaterials. The specific preparation method is as follows: Zn(NO 3 ) 2 Put it into a NaOH solution with a concentration of 1.0mol / L, heat and stir the reaction, the temperature is controlled at 110°C for reaction, and the stirring speed is controlled at 400rpm. Precipitation occurs after about 2 hours of reaction. After 4 hours, the precipitation is complete, and then the temperature is raised to 350°C for heating. Decomposition reaction, stop heating after 3 hours of reaction, cool down and let stand. Adjust the pH value, filter with suction and repeatedly wash with water until neutral, and dry to obta...

Embodiment 2

[0054] This embodiment provides a high-resistance anti-corona belt for a high-voltage motor, and the high-resistance anti-corona belt is prepared by the following steps:

[0055] (1) The substrate material unwinds, using a 0.10±0.02mm×25mm polyester non-woven tape;

[0056] (2) Zn(NO 3 ) 2 Put it into a NaOH solution with a concentration of 2.0mol / L, heat and stir the reaction, the temperature is controlled at 100°C for reaction, and the stirring speed is controlled at 300rpm. Precipitation occurs after about 2 hours of reaction. After 4 hours, the precipitation is complete, and then the temperature is raised to 400°C for heating. Decomposition reaction, stop heating after 4 hours of reaction, cool down and let stand. Adjust the pH value, filter with suction and repeatedly wash with water until neutral, and dry to obtain ZnO nanomaterials, wherein Zn(NO 3 ) 2 The mass ratio with NaOH is 1:2.

[0057] (3) Heating the ZnO nanomaterials prepared in step (2) into a semi-molte...

Embodiment 3

[0061] This embodiment provides a high-resistance anti-corona belt for high-voltage motors, which is prepared by the following steps:

[0062] (1) Unwinding of the base material, using 0.10±0.02mm×25mm electrical non-alkali glass silk braid;

[0063] (2) Zn(NO 3 ) 2 Put it into a NaOH solution with a concentration of 3.0mol / L, heat and stir the reaction, the temperature is controlled at 120°C for reaction, and the stirring speed is controlled at 300rpm. After about 1 hour of reaction, precipitation appears, and after 4 hours the precipitation is complete, and then the temperature is raised to 300°C Carry out thermal decomposition reaction, stop heating after 3 hours of reaction, cool down and let stand. Adjust the pH value, filter with suction and repeatedly wash with water until neutral, and dry to obtain ZnO nanomaterials, wherein Zn(NO 3 ) 2 The mass ratio to NaOH is 1:3.

[0064] (3) The ZnO nanometer material prepared by step (2) is heated to be melted, and then the ...

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Abstract

The invention relates to a high-resistance corona-proof belt, and a preparation method and application thereof. The high-resistance corona-proof belt comprises a substrate and a ZnO nanomaterial coating coated on the surface of the substrate. When the high-resistance corona-proof belt is prepared, a thermal spraying technology is adopted to spray a ZnO nanomaterial on the surface of the substrate, and then the high-resistance corona-proof belt is obtained after cooling. The high-resistance corona-proof belt has stable surface electric rate value, is applied to a high-voltage motor and can reach superior product indexes of a ministerial standard: (1) the discharge inception voltage of an end of a single coil is not less than 5.0Un; (2) the flashover voltage of the end of the single coil in air is not less than 12Un and the highest flashover voltage is more than 300kV; (3) the single coil passes an industrial frequency AC disruptive test under industrial frequency AC 6.0Un voltage for one minute; and (4) the discharge inception voltage of a motor stator winding (whole machine) is not less than 3.0Un.

Description

technical field [0001] The invention relates to a high-resistance anti-corona belt for a high-voltage motor containing a low-latitude structure semiconductor material and a preparation method thereof. Background technique [0002] There is a high voltage difference between the end of the low-resistance anti-corona layer of the stator coil in the slot of the high-voltage motor and the end of the copper core guide rod in the coil insulation, so that the electric field at the end of the low section is concentrated, that is, the potential changes abruptly, thereby generating electricity gosh. [0003] The surface resistivity of medium resistance, medium high resistance and high resistance anti-corona materials for high-voltage motors is unstable, resulting in frequent discharge and flashover of the anti-corona layer at the end; after the motor stator is installed, the motor stator winding generates corona voltage ( Corona inception voltage) is low, which can easily cause breakd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/40H02K3/30B82Y30/00C01G9/02
CPCB82Y30/00C01G9/02C01P2004/62H02K3/30H02K3/40
Inventor 夏宇莫耀翔王文周成
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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