Recently developed industrial dielectric enables RF capacitors for high-kVAR resonant tank use

Abstract

This article describes designer's experience with radiofrequency (RF) high reactive power capacitors problems, which in many cases may be a critical element for various devices - like ICP plasma torches; SMPS converters; induction heaters; radio transmitters etc. New materials at the markets allow to solve the problem that at small capacitance - high voltage - high amperage combination, capacitors have to withstand circulating reactive power load from kVAR to MVAR range, hence the value of loss factor tan(?) of the selected insulator material has a critical role, to minimize overheating. Few designer strategies are disputed, and convincing experimental data on selected new industrial materials are presented.