公开(公告)号：US11011350B2

公开(公告)日：2021-05-18

申请号：US15509146

申请日：2014-09-04

Applicant: COMET AG

Inventor： Mike Abrecht ,  Thomas Fink ,  Walter Bigler

IPC: H01J37/32 ,  H01G7/06 ,  H03H7/40

Abstract: A power capacitor (7) is described for use in an RF power delivery system. The power capacitor comprises at least two RF electrodes (18, 19) separated by a capacitor dielectric (17) comprising a solid paraelectric dielectric material whose relative permittivity is controllable by varying a DC bias voltage applied across the dielectric (17) at DC bias electrodes (10, 26, 28). Composite capacitor configurations, an RF power system and a method of controlling the power capacitor are also described.

公开(公告)号：US09721729B2

公开(公告)日：2017-08-01

申请号：US14891584

申请日：2014-05-28

Applicant: COMET AG

Inventor： Mark Joachim Mildner ,  Roland Bieri ,  Mike Abrecht ,  Walter Bigler ,  Douglas Beuerman ,  Jack Gilmore

IPC: H01G5/013 ,  H01G5/01 ,  H01G5/00 ,  H01G5/014 ,  H01G5/04 ,  H01G5/14 ,  H01G5/38 ,  H01G5/011

CPC classification number: H01G5/013 ,  H01G5/011 ,  H01G5/014 ,  H01G5/04 ,  H01G5/145 ,  H01G5/38 ,  H01G2005/02

Abstract: A vacuum variable capacitor includes a pre-vacuum enclosure for reducing a pressure differential across the bellows, wherein a drive is disposed outside the enclosures of the vacuum variable capacitor. The vacuum force load on the drive system can thereby be reduced, allowing faster movement of the movable electrode, faster capacitance adjustment of the vacuum variable capacitor and longer lifetimes of the device.

公开(公告)号：US09691548B2

公开(公告)日：2017-06-27

申请号：US14771484

申请日：2013-03-19

Applicant: COMET AG

Inventor： Roger Tanner ,  Walter Bigler ,  Mark Joachim Mildner ,  Mike Abrecht

IPC: H01G4/02 ,  H01G2/10 ,  H01G4/012 ,  H01G4/224

CPC classification number: H01G4/02 ,  H01G2/10 ,  H01G4/012 ,  H01G4/224

Abstract: A high-voltage capacitor includes a gas-tight enclosure containing interleaved electrodes. The dielectric of the capacitor is a pressurized gas at a pressure of at least 6 bar, and preferably 10 or 15 bar. In order to withstand this level of internal pressure, the insulating body section of the capacitor may be formed of a high-strength polymeric material.

公开(公告)号：US11621125B2

公开(公告)日：2023-04-04

申请号：US16605288

申请日：2018-04-13

Applicant: COMET AG

Inventor： Thierry Altenhoven ,  Walter Bigler ,  Timothy Albert Weber ,  Mark Mildner

IPC: H01G2/08 ,  H01G5/14 ,  H01G5/017 ,  H01G5/013 ,  H01G5/00

Abstract: A variable vacuum capacitor is described in which oil inside the main bellows (21) is pumped through the bellows and through the oil circuit (8) of a heat exchanger by a pump (15). Water passes through coolant channels (6) of the heat exchanger, from inlet (7) to outlet (7′). The extendable capacitor drive shaft (14) is hollow and serves as a conduit, conveying the oil to the bottom of the (bellows 21), thereby ensuring a full circulation of the oil right through the bellows and then through the heat exchanger. Pump drive means (9) may be a gerotor hydraulic motor, coupled to a gerotor oil pump (15) via magnetic coupling (22). Pumping heat transfer fluid (oil) through the bellows allows the capacitor to operate at significantly higher currents and/or lower temperatures, and significantly extends the life of the device.

公开(公告)号：US20180233330A1

公开(公告)日：2018-08-16

申请号：US15509146

申请日：2014-09-04

Applicant: COMET AG

Inventor： Mike Abrecht ,  Thomas Fink ,  Walter Bigler

IPC: H01J37/32 ,  H01G7/06

CPC classification number: H01J37/32183 ,  H01G7/06 ,  H01J37/32082 ,  H01J37/32174 ,  H03H7/40

Abstract: A power capacitor (7) is described for use in an RF power delivery system. The power capacitor comprises at least two RF electrodes (18, 19) separated by a capacitor dielectric (17) comprising a solid paraelectric dielectric material whose relative permittivity is controllable by varying a DC bias voltage applied across the dielectric (17) at DC bias electrodes (10, 26, 28). Composite capacitor configurations, an RF power system and a method of controlling the power capacitor are also described.

公开(公告)号：US09805873B2

公开(公告)日：2017-10-31

申请号：US14891576

申请日：2013-05-30

Applicant: COMET AG

Inventor： Mark Joachim Mildner ,  Roland Bieri ,  Mike Abrecht ,  Walter Bigler ,  Douglas Beuerman ,  Jack Gilmore

IPC: H01G5/01 ,  H01G5/013 ,  H01G5/00 ,  H01G7/00 ,  H01G5/16 ,  H01G5/04 ,  H01G5/014 ,  H01G5/14 ,  H01G5/38 ,  H01G5/011

CPC classification number: H01G5/013 ,  H01G5/011 ,  H01G5/014 ,  H01G5/04 ,  H01G5/145 ,  H01G5/38 ,  H01G2005/02

Abstract: A vacuum variable capacitor includes a pre-vacuum enclosure for reducing a pressure differential across the bellows. The vacuum force load on the drive system can thereby be reduced, allowing faster movement of the movable electrode, faster capacitance adjustment of the vacuum variable capacitor and longer lifetimes of the device.

公开(公告)号：US11488785B2

公开(公告)日：2022-11-01

申请号：US17420523

申请日：2021-02-16

Applicant: COMET AG

Inventor： Walter Bigler

IPC: H01G5/013 ,  H01G5/014 ,  H01G5/011 ,  H01G5/00

Abstract: The present invention relates to a vacuum capacitor (1, 30) comprising an enclosure (9) to contain a vacuum dielectric medium, a first electrode (12) and a second electrode (13) separated by said vacuum dielectric medium, the enclosure (9) comprising a first conductive collar (2) in electrical contact with the first electrode (12) and a second conductive collar (3) in electrical contact with the second electrode (13), the first conductive collar (2) and the second conductive collar (3) being separated by an insulating element (4) of the enclosure (9), wherein the enclosure (9) exhibits at least one protruding edge (6), said protruding edge (6) being in electrical contact with the closest of the first conductive collar (2) or the second conductive collar (3), wherein the vacuum capacitor (1, 30) comprises at least one protection means (7, 37) covering on the outside of the vacuum enclosure the protruding edge (6), wherein the protection means (7, 37) is made at least partially of an elastomer, wherein at least the outer surface (7b, 37b) of the protection means (7, 37) is electrically conductive and is at the same electrical potential as the closest conductive collar to the protruding edge (6), and wherein the outer surface (7b, 37b) of the protection means (7, 37) has a radius of curvature greater than the radius of curvature of the protruding edge (6).

公开(公告)号：US20200058441A1

公开(公告)日：2020-02-20

申请号：US16605288

申请日：2018-04-13

Applicant: COMET AG

Inventor： Thierry Altenhoven ,  Walter Bigler ,  Timothy Albert Weber ,  Mark Mildner

IPC: H01G2/08 ,  H01G5/017 ,  H01G5/14 ,  H01G5/013

Abstract: A variable vacuum capacitor is described in which oil inside the main bellows (21) is pumped through the bellows and through the oil circuit (8) of a heat exchanger by a pump (15). Water passes through coolant channels (6) of the heat exchanger, from inlet (7) to outlet (7′). The extendable capacitor drive shaft (14) is hollow and serves as a conduit, conveying the oil to the bottom of the (bellows 21), thereby ensuring a full circulation of the oil right through the bellows and then through the heat exchanger. Pump drive means (9) may be a gerotor hydraulic motor, coupled to a gerotor oil pump (15) via magnetic coupling (22). Pumping heat transfer fluid (oil) through the bellows allows the capacitor to operate at significantly higher currents and/or lower temperatures, and significantly extends the life of the device.