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Metallized membrane capacitor assembly

A technology of capacitor components and metallized films, applied in the field of capacitors, can solve problems such as easy explosion, and achieve the effects of high electric strength, high working voltage, good mechanical properties and service life

Active Publication Date: 2013-07-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a metallized film capacitor assembly, which solves the problem that the existing high-voltage metallized film capacitors are easy to explode when used in atmospheric pressure or low pressure environments

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] As shown in Figure 1(A), Figure 1(B), Figure 2(A), Figure 2(B), Figure 3(A), Figure 3(B), Figure 4(A), Figure 4(B) , The embodiment of the present invention includes capacitor core 5, copper bar 6, DMD insulating paper 8, bus bar 9, high voltage lead-out electrode 10a, low-voltage lead-out electrode 10b and polyurethane potting glue 11.

[0026] As shown in Figure 1(A) and Figure 1(B), the capacitor core 5 is wound together on the mandrel 1 by stacking two layers of metallized polypropylene film 2, and the two layers of metallized polypropylene film 2 are wound together. A polypropylene light film 3 is inserted between the ends, the polypropylene light film is wrapped outside the metallized polypropylene film 2, and then wound 20 times, and the metal layer 4 is sprayed on both ends after winding;

[0027] The structure of the metallized polyprop...

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Abstract

The invention discloses a metallized membrane capacitor assembly, which belongs to a capacitor used in the pulse power field and solves the problem that the traditional high-voltage metallized membrane capacitor is readily explosive when used in atmospheric or low pressure environment. The metallized membrane capacitor assembly comprises capacitor cores, DMD (Digital Micromirror Device) insulating papers, a high-voltage extraction electrode and a low-voltage extraction electrode, wherein M capacitor cores achieve the purpose of connecting capacitors in parallel to form capacitor stacks; N capacitor stacks achieve the purpose of connecting capacitors in series to form capacitor assemblies; the DMD insulating papers are arranged among the capacitor stacks; and the capacitor assemblies, the DMD insulation papers, the high-voltage extraction electrode and the low-voltage extraction electrode are integrally encapsulated by polyurethane pouring sealant to form the metallized membrane capacitor assembly. The metallized membrane capacitor assembly has higher energy storage density and electric strength, good insulation reliability in atmospheric or low pressure environment, and better mechanical performance and longer service life under a heavy-current discharging condition.

Description

technical field [0001] The invention belongs to capacitors used in the field of pulse power, and in particular relates to a metallized film capacitor assembly, which is applied in atmospheric pressure or low pressure environments. Background technique [0002] Due to the metallization process, the metallized film capacitor has self-healing properties, can work under the critical breakdown field strength, greatly improves the energy storage density of the dielectric film, and reduces the volume of the energy storage element. Therefore, at present, metallized film capacitors are often used as primary energy storage and intermediate energy storage of pulse power supplies. [0003] It is worth pointing out that in order to achieve higher energy storage density, the existing high-voltage metallized film capacitors need to have a higher packaging factor, that is, the volume utilization rate, which requires consideration of the design of the internal insulation structure. Pulse ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/002H01G4/14H01G4/224H01G4/38H01G4/005
Inventor 李化林福昌陈耀红吕霏章妙李智威刘德
Owner HUAZHONG UNIV OF SCI & TECH
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