Electrode foil expansion face corrosion method for alternating-current motor starting capacitor

A technology of AC motor and electrode foil, which is applied in the field of electrode foil corrosion, can solve the problems of sensitive frequency response and complicated corrosion method of medium and high voltage electrode foil, and achieve the effect of inhibiting surface dissolution, sensitive frequency response and stable performance

Inactive Publication Date: 2014-10-01
南通南辉电子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the principle formula of the capacitor: it can be seen that the dielectric coefficient ε of the medium is a constant, so to increase the electrostatic capacity Cap, it is necessary to increase the surface area S of the electrode. The surface expansion method and the corrosion method are more complicated, and the usual corrosion method cannot meet the requirements of sensitive frequency response, low loss and fast heat dissipation of the medium and high voltage electrode foil, and requires innovative and corresponding corrosion technology to achieve

Method used

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  • Electrode foil expansion face corrosion method for alternating-current motor starting capacitor
  • Electrode foil expansion face corrosion method for alternating-current motor starting capacitor
  • Electrode foil expansion face corrosion method for alternating-current motor starting capacitor

Examples

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Effect test

Embodiment 1

[0031] Soak an electronic aluminum foil with a thickness of 85 μm in a 10% nitric acid solution by volume at 77°C for 2 minutes, take it out and wash it with water for the first time for 2 minutes;

[0032] Put the aluminum foil washed for the first time in a mixture of 2.8% by mass hydrochloric acid and 25% by mass sulfuric acid at 83°C with a current density of 250mA / cm 2 Under the condition of DC electrolytic corrosion for 50 seconds, take out the second washing with water for 2 minutes;

[0033] Put the aluminum foil washed for the second time in a 5.5% hydrochloric acid solution containing 0.05g / L polystyrene anionic active agent by mass percentage, at 80°C and a current density of 20mA / cm 2 Under the condition of DC electrolytic corrosion for 520 seconds, take out the third washing with water for 2 minutes;

[0034] Soak the aluminum foil washed for the third time in 8% by volume nitric acid solution at 60°C for 120 seconds, take out the aluminum foil for the fourth tim...

Embodiment 2

[0037] Soak an electronic aluminum foil with a thickness of 85 μm in a 12% nitric acid solution by volume at 80°C for 105 seconds, take it out and wash it with water for 2 minutes for the first time;

[0038] Put the aluminum foil washed for the first time in a mixture of 3.5% hydrochloric acid and 20% sulfuric acid by mass, at 85°C, with a current density of 220mA / cm 2 Under the condition of DC electrolytic corrosion for 45 seconds, take out the second washing with water for 2 minutes;

[0039] Put the aluminum foil washed for the second time in a 3.5% hydrochloric acid solution containing 0.02g / L polystyrene anionic active agent by mass percentage, at 78°C and a current density of 30mA / cm 2 Under the condition of DC electrolytic corrosion for 450 seconds, take out the third washing with water for 2 minutes;

[0040] Soak the aluminum foil washed for the third time in 8% by volume nitric acid solution at 55°C for 105 seconds, take it out and wash it for 2 minutes for the fou...

Embodiment 3

[0043] Soak electronic aluminum foil with a thickness of 85 μm in 8% nitric acid solution by volume at 83°C for 2 minutes, take it out and wash it with water for 2 minutes for the first time;

[0044] Put the aluminum foil washed for the first time in a mixture of 3.5% hydrochloric acid and 22% sulfuric acid by mass, at 82°C, with a current density of 180mA / cm 2 Under the condition of DC electrolytic corrosion for 50 seconds, take out the second washing with water for 2 minutes;

[0045] Put the aluminum foil washed for the second time in a 4.5% hydrochloric acid solution containing 0.10g / L polystyrene anionic active agent by mass percentage, at 82°C and a current density of 22mA / cm 2 Under the condition of DC electrolytic corrosion for 480 seconds, take out the third washing with water for 2 minutes;

[0046] Soak the aluminum foil washed for the third time in 10% by volume nitric acid solution at 50°C for 120 seconds, take out the aluminum foil for the fourth time and wash ...

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Abstract

The invention discloses an electrode foil expansion face corrosion method for an alternating-current motor starting capacitor. The electrode foil expansion face corrosion method includes the steps of electronic aluminum foil selection and electronic aluminum foil corrosion and is characterized in that electronic aluminum foil is medium and high voltage electronic aluminum foil with the thickness of 85 microns; the electronic aluminum foil corrosion step includes pretreatment and first washing, first-stage hole forming corrosion and second washing, second-stage hole expanding corrosion and third washing, aftertreatment, fourth washing and drying. The corrosion holes of the corrosion foil produced with the production method are large in hole diameter and are through, when the formed foil obtained after formation is used for the alternating-current motor starting capacitor, the formed foil can be fully soaked in electrolyte solution, the capacitor is low in temperature and small in loss in the using process, the applicable formation voltage ranges from 120 Vf to 660 Vf, the capacitor is sensitive in frequency response, small in loss and fast in heat dissipation in the using process, the applicable voltage is wide in range, and the performance is stable.

Description

technical field [0001] The invention relates to a surface-expanding corrosion method of an electrode foil used in an AC motor starting capacitor, and belongs to the technical field of electrode foil corrosion. Background technique [0002] AC motor starting capacitors are widely used in the starting operation of electric motors in refrigerators, washing machines, air conditioners, electric fans, range hoods, bread machines, paper shredders, dishwashers and other electrical appliances and equipment. [0003] The AC motor starting capacitor is a non-polar aluminum electrolytic capacitor, which enables the motor to obtain a higher starting torque at a lower starting current. Both the positive and negative poles of the AC motor starting capacitor use anode foils, because the anode foils work alternately at positive and negative potentials, so the anode foils are required to have the characteristics of sensitive frequency response, low loss, and fast heat dissipation. Correspond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055C25F3/04
Inventor 吴卫东李世才陈云徐红梅李晓天管德海
Owner 南通南辉电子材料股份有限公司
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