US 11,990,281 B2
Electrode unit for a vacuum capacitor and a vacuum capacitor
Marco Fasel, Ueberstorf (CH); Mark Mildner, Gurbrü (CH); Timothy Weber, Bern (CH); and Janina Bischof, Bern (CH)
Assigned to COMET AG, Flamatt (CH)
Filed by COMET AG, Flamatt (CH)
Filed on Jun. 17, 2021, as Appl. No. 17/350,659.
Claims priority of application No. 20181200 (EP), filed on Jun. 19, 2020.
Prior Publication US 2021/0398746 A1, Dec. 23, 2021
Int. Cl. H01G 4/32 (2006.01); H01G 4/005 (2006.01); H01G 4/02 (2006.01); H01G 5/011 (2006.01); H01G 5/013 (2006.01); H01G 5/14 (2006.01)
CPC H01G 4/02 (2013.01) [H01G 4/005 (2013.01); H01G 4/32 (2013.01); H01G 5/011 (2013.01); H01G 5/013 (2013.01); H01G 5/14 (2013.01)] 13 Claims
OG exemplary drawing
 
1. Electrode unit for an electric vacuum capacitor comprising a band-shaped capacitor plate with a height H, wherein the band-shaped capacitor plate is wound in a spiral with a maximum diameter Dmax and a constant distance between successive turns, wherein the band-shaped capacitor plate comprises a first longitudinal edge attached to a supporting part and a second longitudinal edge, the second longitudinal edge being free, wherein, at the outer extremity of the spiral, the first longitudinal edge and the second longitudinal edge are connected by an inclined edge such that the first longitudinal edge is longer than the second longitudinal edge, wherein the inclined edge forms with the longitudinal axis (B) of the band-shaped capacitor plate an angle α less than or equal to an angle αmax=(45°·π/180°), wherein angle α is greater than or equal to an angle αmin=γ·tan−1(2H/(π·Dmax)), wherein γ is a real number greater than or equal to 1.0, and wherein the supporting part is made of copper, silver, aluminum or an alloy thereof and the band-shaped capacitor plate is made of stainless steel, carbon steel, molybdenum, tantalum, tungsten, nickel, Inconel®, titanium, chromium or an alloy thereof.