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公开(公告)号：EP3926651A1
公开(公告)日：2021-12-22
申请号：EP20181200.5
申请日：2020-06-19
申请人： Comet AG
发明人： Weber, Timothy , Bischof, Janina , Fasel, Marco , Mildner, Mark
摘要： The present invention relates to an electrode unit (10, 20) for an electric vacuum capacitor comprising a band-shaped capacitor plate (11, 21) with a height H, wherein the band-shaped capacitor plate (11, 21) is wound in a spiral with a maximum diameter D max and a constant distance between successive turns, wherein the band-shaped capacitor plate (11, 21) comprises a first longitudinal edge (11a, 21a) attached to a supporting part (12) and a second longitudinal edge (11b, 21b), the second longitudinal edge (11b, 21b) being free, wherein at the outer extremity of the spiral, the first longitudinal edge (11a, 21a) and the second longitudinal edge (11b, 21b) are connected by an inclined edge (11c, 21c) such that the first longitudinal edge (11a, 21a) is longer than the second longitudinal edge (11b, 21b), wherein the inclined edge (11c, 21c) forms with the longitudinal axis (B) of the band-shaped capacitor plate (11, 21) an angle α less than or equal to an angle α max = (45°·π/180°). The invention relates also to a vacuum capacitor (30) comprising at least one electrode unit (10, 20) according to the present invention.
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公开(公告)号：EP4187565A1
公开(公告)日：2023-05-31
申请号：EP21210518.3
申请日：2021-11-25
申请人： Comet AG
发明人： Mildner, Mark , Fasel, Marco
摘要： The present invention concerns a vacuum variable capacitor (1) comprising a vacuum sealed enclosure (2) to contain a vacuum dielectric medium, wherein the enclosure (2) comprises a first plate (3) and a second plate (4), the said first plate (3) and the said second plate (4) being separated by an electrically insulating element (5), a fixed electrode (6) attached inside the enclosure (2) to the first plate (3) and a movable electrode (8) attached to a movable plate (7), wherein the movable plate (7) is attached inside the enclosure (2) to the second plate (4) by means of at least one vacuum bellows (9), wherein the vacuum capacitor (1) comprises a mechanical drive system (10) for displacing, in particular translating, the movable plate (7) relative to the first plate (3) so as to vary the capacitance of the vacuum capacitor (1), wherein the mechanical drive system (10) comprises a ball screw (11) arranged to drive the movable plate (7) and wherein the mechanical drive system (10) comprises outside of the vacuum sealed enclosure (2) a limiting element (14) limiting the maximum distance between the first plate (3) and the movable plate (7).
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公开(公告)号：EP3389063A1
公开(公告)日：2018-10-17
申请号：EP17166679.5
申请日：2017-04-13
申请人： Comet AG
摘要： 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.
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