Aerovox Corp. has developed a patent-pending technology that increases the stability of polypropylene film capacitors in high temperature applications. The company’s new UltraTherm(TM) technology improves dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. breakdownA disruptive discharge through insulation. If plain dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. films are used, this is usually catastrophic. If metallized films are used, self-healing should maintain the capacitor's integrity. strength by 20% or more versus traditional designs (≤105°C).
Testing of Aerovox capacitors to 155°C using UltraTherm technology has demonstrated minimal capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. change and robust DC breakdownA disruptive discharge through insulation. If plain dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. films are used, this is usually catastrophic. If metallized films are used, self-healing should maintain the capacitor's integrity. over a broad temperature range.
Many advanced power electronics applications in the automotive, aviation and other industries operate at high temperature (>105°C). Reasonably priced film capacitors with desirable electrical characteristics have not been available or if used, have a short operating life due to demanding the performance requirements of high temperature applications.
“Addition of UltraTherm technology to polypropylene capacitors operating at high temperature will provide significant technical and economic benefits,” said Jim Faughnan, President & CEO. “Aerovox has employed a unique engineering dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. design approach to address performance failures that, to date, have been costly and complex to solve.”
Addition of UltraTherm will increase the usable operating life of polypropylene capacitors in high temperature applications, potentially replacing problematic ceramic and tantalum capacitorsThe tantalum capacitor distinguishes itself from other capacitors in having high capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. per volume and weight. Relative to other electrolytic capacitors, tantalum capacitors have low resistance, low leakage, and can operate in higher temperature environments, but non-electrolytics are even better in these regards.. In addition to the automotive and aviation industries, performance of many DC link applications and DC applications with high RMS current will benefit from the technology.
