Abstract:
A power capacitor includes a body that defines an interior space; and at least one capacitive device in the interior space. The capacitive device includes a first electrode; and a second electrode separated from the second electrode. The power capacitor also includes a dielectric nanofluid in the interior space and between the first electrode and the second electrode, the dielectric nanofluid including: a base dielectric fluid; and nanoparticles dispersed in the base dielectric fluid.
Abstract:
A method of manufacture of a polymer or ceramic polymer capacitor, of various sizes and voltage ratings. The fabrication equipment deposits a polymer or ceramic polymer dielectric layer on a carrier substrate with the electrode structure of the capacitor previously deposited on its surface. The sheet is often then fabricated into a capacitor by rolling into an axial style or the sheet is cut and stacked into a rectangular type. An alternate arrangement of the fabrication process has additional electrode layers deposited alternating with dielectric layers in continuous process until the desired number of layers is achieved. At that point the sheet is cut to form capacitors of a rectangular form.
Abstract:
A failure resistant capacitor, using ceramic as a part of the dielectric structure. The capacitor is made using at least one failure resistant electrode forming one polarity of electrode in capacitor. The dielectric layers separating the electrodes are composed at least partly of a high K ceramic material. Each layer of the capacitor has an electrode on one side of a dielectric layer, which is then assembled such that there is at least one alternating failure resistant electrode with at least one dielectric layer separating an adjacent opposite polarity electrode. The failure resistant electrode is designed to be capable of disconnecting a defect in the dielectric layer from the rest of the capacitor structure. Alternately, the capacitor may be constructed with an electrode structure that limits the energy discharged through a defect in the dielectric layer to an amount predefined by the electrode construction. The dielectric layer may be composed of fused ceramic dielectric layers or from a ceramic polymer dielectric.
Abstract:
A thin film capacitor for use in an implantable defibrillator. A first dielectric polymer film layer has a metallized film on one side thereof. A second dielectric polymer film layer has a metallized film on one side thereof. The first and second layers are overlain on each other and wound spirally with the metallized film of one layer adjacent the dielectric polymer of the other layer. The beginnings and ends of the first and second metallized films are offset from the respective beginnings and ends of the first and second polymer film layers. The dielectric layers can be tapered in increasing thickness toward the respective beginnings and ends of the layers. The dielectric layers can themselves comprise at least two layers of differing polymer materials, the preferred materials being polyvinylidene fluoride and polyester for improved energy density and self-healing properties.