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

发明人： Altenhoven, Thierry ,  Bigler, Walter ,  Weber, Timothy Albert ,  Mildner, Mark

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

CPC分类号： H01G2/08 ,  H01G5/013 ,  H01G5/017 ,  H01G5/14

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.