• 제목/요약/키워드: Metallized film capacitor

검색결과 3건 처리시간 0.018초

전력전자용 금속증착 필름 커패시터 설계 및 신뢰성 평가 (The Design and Reliability Evaluation of Metallized Film Capacitor for Power Electronic Applications)

  • 윤중락;김영광;이석원;이헌용
    • 한국전기전자재료학회논문지
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    • 제24권5호
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    • pp.381-386
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    • 2011
  • This paper presents the design and reliability evaluation of metallized film capacitor for power e lectronics application. The rated voltage of development capacitor is DC 3300[V], the capacitance is 5 ${\mu}F$ and the ripple current capability is 130 $A_{rms}$. Film metallization and patterns are an important design factor that has been development enhance the electric and reliability properties of film capacitor for power electronics. In term of capacitor construction and metallized pattern is one of the parameters that can be modified to further improve the rating in the terms of maximum ripple current and lifetime. This capacitor can be used as snubber capacitor application such as power train invertor system.

The Characteristics and Growth Mechanisms of Demetallization due to Self Healing on MPPF for Capacitor Applications

  • Jung, Jong-Wook;Kwak, Hee-Ro
    • KIEE International Transactions on Electrophysics and Applications
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    • 제4C권3호
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    • pp.117-122
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    • 2004
  • In order to help understand the growth mechanisms of demetallization due to self healing on a metallized polypropylene film (MPPF), several types of defects affecting the breakdown of capacitor dielectrics were made. The breakdown voltages with dielectric thickness were measured at self healing and the demetallized area was evaluated for all of the self healing events. The shapes and growth processes of the demetallized spots on the dielectrics were investigated. As a result, self healing mainly occurred at pin tips, wrinkle sides, and junctions of the wrinkles, and the breakdown voltages strongly depended on the thickness of the dielectrics. In addition, the demetallized area due to self healing was governed by the breakdown voltage and it has been mainly grown by some factors; the applied voltage; the consequent self healing events taking place at the circumference of the original self healing spots; the conductive paths formed by two or more self healing spots and by the consequent self healing spots.

필름 Capacitor의 전기적Damage에 관한 연구 (electrical Damage of Metallized Film Capacitors)

  • 서광석
    • 대한전기학회논문지
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    • 제40권6호
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    • pp.574-581
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    • 1991
  • Damage in film capacitors has been investigated, using FTIR and ESCA, aiming to elucidate the nature of electrode removal and the possibility of base films to be damaged. Also, tests were conducted to investigate the effect of a long-term thermal aging at elevated temperatures. Unsuccessful clearing or grape-clustering processes can induce a long-term degradation which involves the chemical and morphological changes. Major changes are the oxidation and the decrease in surface crystallinity possibly arising from the corona discharge. An immediate deterioration of BOPP film may occur when the air entrapped between the film layers induces an extensive autocatalytic oxidative degradation. This type of immediate damage may result in a premature failure at an early stage of qualification test. As far as the nature of electrode removal is concerned, a permanent removal of electrode materials was observed in the main erosion area.

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