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A method and device for obtaining unipolar discharge traces on high-voltage electric surfaces

A discharge trace and surface discharge technology, applied in the field of obtaining unipolar discharge traces on high-voltage electrical surfaces, can solve the problems of different direction and distribution pattern of discharge traces, short circuit on the surface of products, affecting the directionality and continuity of discharge trace patterns, etc. Achieve the effect of ensuring pattern continuity, uniform development and simple structure

Active Publication Date: 2019-10-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, when the positive and negative electrodes develop discharge traces at the same time, the direction and distribution pattern of the discharge traces extending from the two electrodes are different, thus affecting the directionality and continuity of the discharge trace pattern
Fourth, the carbonized discharge traces left by surface discharge are conductors, and the discharge traces are equivalent to extending the lead-out electrodes. If the positive and negative electrodes develop discharge traces at the same time, the discharge traces of the two electrodes tend to be connected at the shortest distance, resulting in a short circuit on the surface of the product, which is easy Leaving blank areas that are difficult to fill near the junctions of discharge traces
However, if it is not controlled in the actual implementation, regardless of the use of AC, pulse and DC, surface discharge may occur and develop at more than one electrode at the same time, limiting the application value of surface discharge traces in product surface modification methods

Method used

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  • A method and device for obtaining unipolar discharge traces on high-voltage electric surfaces
  • A method and device for obtaining unipolar discharge traces on high-voltage electric surfaces
  • A method and device for obtaining unipolar discharge traces on high-voltage electric surfaces

Examples

Experimental program
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Effect test

Embodiment 5

[0032] Example 5 provides a counterexample to illustrate the influence of the peak voltage higher than 3kV when the positive and negative electrodes are under no load. A self-excited push-pull boost power supply is used as a comparison device, and the power supply structure is a self-excited push-pull ZVS boost with frequency open-loop control Circuit, the working frequency range is 13 ~ 42kHz, the output of the power supply is rectified into a pulsating direct current connected to the positive and negative electrodes, and the no-load peak voltage between the electrodes is 10kV. The peak power of the device is 200W, the rectification circuit is consistent with the rectification circuit in the test device of the present invention, the test device and the control device use the same electrode group, and the conditions required for the control test are provided.

[0033] In Examples 1 to 3, the surface discharge starts at the first power supply condition, and the power supply cond...

Embodiment 1

[0036] In this embodiment, conditions 1 to 3 illustrate the feasibility of unipolar discharge, and use conditions 4 to 5 as a comparison to illustrate the significance of unipolar discharge; condition 6 illustrates the occurrence of another polarity discharge during unipolar surface discharge and development is inhibited or cannot occur. in 9M NiCl 2 Add 2.3wt.% SiO to the aqueous solution 2 , 4.2wt.% PEG-200 is used as the conductive agent used in this embodiment, wherein the metal ion charge concentration is 18M. A volume of 1.0 ml of conductive agent was applied to the tested area of ​​the modified article.

Embodiment 1

[0037] Example 1 Condition 1. Using test device 1, the electrodes are loaded with 35 kHz pulsating direct current with a duty ratio of 0.3. During the surface discharge process, the peak voltage is 0.78kV and the power consumption is 25W.

[0038] Example 1 Condition 2. Using test device 2, the electrodes were loaded with 18 kHz pulsating direct current with a duty cycle of 0.4. During the surface discharge process, the peak voltage is 0.91kV and the power consumption is 55W.

[0039] Example 1 Condition 3. Using test device 3, the electrodes were loaded with 120 kHz pulsating direct current with a duty cycle of 0.5. During the surface discharge process, the peak voltage is 0.98kV and the power consumption is 7.5W.

[0040] The implementation result of embodiment 1 condition 1~3 is as follows figure 2 . The oblique line in the figure is the dividing line for switching power supply conditions, dividing the implementation results of conditions 1 to 3 from right to left, ...

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Abstract

The invention provides a method and device for obtaining a high-voltage electricity surface unipolar discharging trace. Through cooperation of a conductive additive, the unipolar discharging trace canbe obtained on the surface of a product through pulse direct current. In the method and the device, a PWM signal generator generates a drive signal, a direct-current pulse voltage is obtained by stimulating a boosting transformer and a rectifying circuit through a power amplifier, the voltage is transmitted to a positive electrode and a negative electrode, the positive electrode and the negativeelectrode are then placed on the product where the conductive additive permeates the surface layer, surface discharging is conducted from an anode or a cathode, and the unipolar discharging trace is left on the surface layer of the product. The macroscopic pattern of the discharging trace has fractal features and can be used for artistic creation, fractal picture template manufacture and craft manufacture. Compared with a method and device for obtaining a discharging trace by applying the industry alternating-current high voltage on the surface of a wet material, the method has the beneficialeffects that unipolar control is achieved, operability is high and pattern continuity is ensured; and the device has the beneficial effects that the device is easy to obtain and the structure is simple.

Description

technical field [0001] The invention relates to a method and a device for obtaining discharge traces on the surface of a product, in particular to a method and a device for obtaining unipolar discharge traces on a high-voltage electric surface. Background technique [0002] Surface discharge is a discharge phenomenon along the interface between different aggregated dielectrics. In the present invention, a high voltage is applied after the surface of the product is penetrated with a conductive agent, so that a band-shaped surface discharge occurs on the product, and the surface discharge develops in the form of the discharge belt advancing on the surface of the product, leaving discharge traces in the form of carbonization on the surface of the material, thus The macroscopic patterns of the formed discharge traces have fractal characteristics, with highly random details and controllable macroscopic directions. At the same time, the macroscopic pattern of the discharge trace ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M9/00
Inventor 李钒金天
Owner BEIJING UNIV OF TECH
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