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A kind of high-resistance anti-corona belt and its preparation method and application

An anti-corona, high-resistance technology, applied in nanotechnology, winding insulation materials, nanotechnology, etc. for materials and surface science, it can solve the problem that the coating amount cannot be accurately and uniformly distributed, changing the coating amount and adjusting the cost. High, solvent-based coating solution is difficult to clean and other problems, to achieve the effect of small effective mass, special energy band structure, no stress and deformation

Active Publication Date: 2019-04-23
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • 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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  • A kind of high-resistance anti-corona belt and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a high-resistance anti-corona belt for high-voltage motors. The anti-corona belt is prepared through the following steps:

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

[0045] (2) The homogeneous precipitation method is used to prepare low-dimensional structure semiconductor materials, namely ZnO nanomaterials. The specific preparation method is as follows: Zn(NO 3 ) 2 Put it into 1.0mol / L NaOH solution and heat and stir the reaction, the temperature is controlled at 110℃, the stirring speed is controlled at 400rpm, the precipitation appears after about 2h, and the precipitation is complete after 4h, then the temperature is raised to 350℃ for heating Decomposition reaction, stop heating after 3h reaction, cool down, and stand still. Adjust the pH value, filter by suction and repeatedly wash with water until it is neutral and dry to obtain ZnO nanomaterials. Among them, Zn...

Embodiment 2

[0054] This embodiment provides a high-resistance anti-corona belt for high-voltage motors. The high-resistance anti-corona belt is prepared by the following steps:

[0055] (1) Unwinding of the base material, using 0.10±0.02mm×25mm polyester non-woven fabric tape;

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

[0057] (3) Heat the ZnO nanomaterial obtained in step (2) into a semi-melted state, and then use a thermal s...

Embodiment 3

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

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

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

[0064] (3) Heat the ZnO nanomaterial obtained in step (2) to melt, and then use a therma...

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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 high-voltage motor slot and the end of the copper core guide rod in the coil insulation, which causes the electric field at the end of the low group section to concentrate, that is, the potential changes sharply, thereby generating electricity gosh. [0003] The surface resistivity of the medium-resistance, medium-high resistance and high-resistance anti-corona materials for high-voltage motors is unstable, causing the end anti-corona layer to often produce discharges, flashovers, etc.; after the motor stator is installed, the motor stator winding generates corona voltage ( The corona initiation voltage) is low, and it is easy to cause the...

Claims

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Application Information

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Patent Type & Authority Patents(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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