High voltage capacitors designed to avoid catastrophic failure modes
A major concern in the operation of high voltage capacitors is the failure mode at end of life. While progress has been made in this area at lower voltages, little has changed for high current capacitors operating above 30 kV in steady state and pulsed power applications. Based on a new development at Maxwell Energy Products, Inc., it is now possible to build capacitors that can operate with a high degree of safety at high voltages. The capacitors reach the normal end of life, while avoiding the catastrophic failures, collateral damage, and unscheduled maintenance, associated with the normal failure mode of today's high voltage capacitors. This paper discusses the problem, capacitor failure modes, capacitor designs and describes a solution to the problem of catastrophic high voltage capacitor failures.
Capacitor Tank-Rupture Prevention -- I2t Considerations
This paper treats capacitor tank-rupture prevention from an I2t viewpoint and provides for the extension of the time-to-rupture curves into the low current very long time energy domain commensurate with partial failure of the capacitors. The generation of the appropriate I2t curves for fuses and capacitors is presented accompanied by recommendations for the prevention of rupture utilizing expulsion and current-limiting fuses.
Investigations of dielectric gratings using electrodynamic models based on volume integral equations
Eigenmodes of planar and cylindrical dielectric gratings (DGs) and electromagnetic wave scattering from multiplayer DGs are investigated. The DG characteristics are calculated using numerical-analytical solution of integral equations (IEs).