Capacitor

Details Capacitor Capacitor

1995-06-13

1996-10-08

Picard, Leo P.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

3613013, 3613015, 3613063, 361323, 361313, 257306, H01G 430, H01G 4232, H01G 4224

Patent

active

055637639

ABSTRACT:
A capacitor for temporary storage of electrical energy comprising at least two capacitor elements (2) composed of electrodes (5) which are separated by one or more dielectrics (6), and especially a power capacitor for high voltage. When the capacitor is being loaded, electrostatic forces give rise to mechanical forces between the electrodes in the capacitor. The forces give rise to vibrations which radiate as sound from the surface of the capacitor. Between, or adjacent to, packages (10) of compressed capacitor elements (2), there are placed one or more active or passive spring elements (11), which are adapted to change the natural frequencies of the capacitor. In this way, the oscillation resistance of the capacitor may be changed at the frequency ranges where the force is acting. The vibrations in the surface layer of the capacitor decrease, resulting in reduced sound radiation from the capacitor.

REFERENCES:
patent: 3484664 (1969-12-01), Liddicoat
patent: 4472758 (1984-09-01), Goto et al.

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