High-voltage ultra-low impedance aluminum electrolytic capacitors with superior emi characteristics

An aluminum electrolytic capacitor, superior technology, applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve the problems of insufficient EMI design margin, etc., and achieve the effects of superior EMI characteristics, large ripple current resistance, and high reliability

Active Publication Date: 2019-06-04
深圳市新中元电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, the purpose of the present invention is to solve the problem of insufficient EMI design margin in the current power supply industry, and propose a high-voltage ultra-low impedance aluminum electrolytic capacitor with superior EMI characteristics

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  • High-voltage ultra-low impedance aluminum electrolytic capacitors with superior emi characteristics
  • High-voltage ultra-low impedance aluminum electrolytic capacitors with superior emi characteristics
  • High-voltage ultra-low impedance aluminum electrolytic capacitors with superior emi characteristics

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific embodiments, the purpose is for the convenience of description, rather than limitation to the technical solution of the present invention, all improvements to the technical content based on the same or similar principles include the addition of corresponding components Subtraction and replacement, for the purpose of achieving substantially the same technical effect, are all within the technical solution defined by the appended claims of the application of the present invention.

[0016] refer to figure 1 As shown in , the high-voltage ultra-low impedance aluminum electrolytic capacitor with excellent EMI characteristics of the present invention includes an aluminum shell 8 , a core 7 inside the aluminum shell 8 and a rubber plug 6 sealed with the opening of the aluminum shell 8 .

[0017] refer to figure 1 and figure 2 As shown in , the core 7 includes a positive electrode aluminum foi...

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Abstract

The invention provides a high-voltage and ultralow-impedance aluminum electrolytic capacitor of superior EMI property, relates to the technical field of aluminum electrolytic capacitors, and solves the deficiency of EMI design margin of the present power supply industry. The aluminum electrolytic capacitor comprises an aluminum shell, a core and rubber plugs. The core comprises a positive aluminum foil, a negative aluminum foil and electrolytic paper separating the positive aluminum foil and the negative aluminum foil, wherein the positive aluminum foil, the negative aluminum foil and the electrolytic paper have a coiling structure. A positive guide pin and a negative guide pin which are led out by the rubber plugs are connected at the middle positions of the positive aluminum foil and the negative aluminum foil in a riveting way. The electrolytic paper is electrolytic paper which is formed by W fibers and S fibers in a double-layer and dual-density composite manner with the impedance of being within 0.43-0.50 EG. Electrolyte of which the conductivity is 2.5-2.9mS / cm and the sparking voltage can be more than 530V is packaged in the aluminum shell. The EMI margin is greater than 12db. Compared with the capacitors in the prior art, the high-voltage aluminum electrolytic capacitor of the superior EMI property has superior EMI property and can withstand high ripple current so that the reliability is high, and the aluminum electrolytic capacitor can be produced by present equipment.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolytic capacitors. Background technique [0002] Due to the EMI (Electromagnetic Interference) standard CISPR 22 promulgated by CISPR (International Special Committee on Radio Interference), the electromagnetic noise of IT equipment such as printers, copiers, and PCs is subject to stricter restrictions. The standard stipulates that when performing radiation interference tests on these devices, the upper limit frequency will be greatly increased from the original 1GHz to 6GHz. Products that do not meet the new standards will be refused import. This will have an impact on the entire electronics industry. [0003] As one of the important components in power supply design, aluminum electrolytic capacitors are mainly used for filtering, bypassing, and coupling. The high-voltage aluminum electrolytic capacitors used as input terminals will also affect the EMI of 100~200MHz. Therefore, if a hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035H01G9/042H01G9/045H01G9/048H01G9/07H01G9/14H01G9/145
CPCY02E60/13
Inventor 周运法姚中峰罗志刚
Owner 深圳市新中元电子有限公司
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