公开(公告)号：US20230395326A1

公开(公告)日：2023-12-07

申请号：US18246527

申请日：2021-08-31

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Gunther A.J. STOLLWERCK ,  Dipankar GHOSH

IPC: H01G4/12 ,  H01G4/10 ,  H01G4/20 ,  G01R15/06

CPC classification number: H01G4/1245 ,  H01G4/10 ,  H01G4/206 ,  G01R15/06

Abstract: A high voltage capacitor for a voltage divider is described that is configured to sense an elevated voltage for medium and high voltage electrical distribution networks. The high voltage capacitor comprises a high voltage electrode, a measurement electrode, and an dielectric material disposed between the high voltage and measurement electrodes, wherein the dielectric material consists essentially of lanthanum oxide-zirconium oxide-titanium oxide (LZT) glass filler disposed in an insulating polymer matrix such that the capacitance of the dielectric material does not vary by more than +/−0.5% in the temperature range of −20° C. to 60° C.

公开(公告)号：US20230368975A1

公开(公告)日：2023-11-16

申请号：US18246549

申请日：2021-09-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Gunther A.J. STOLLWERCK ,  Dipanker GHOSH ,  Ahmad SHAABAN

IPC: H01G4/12 ,  H01G4/14 ,  H01G4/10 ,  G01R15/04 ,  G01R19/00

CPC classification number: H01G4/1227 ,  H01G4/14 ,  H01G4/10 ,  G01R15/04 ,  G01R19/0084

Abstract: A high voltage capacitor for a voltage divider is described that is configured to sense an elevated voltage for medium and high voltage electrical distribution networks. The high voltage capacitor comprises a high voltage electrode, a measurement electrode, and an dielectric material disposed between the high voltage and measurement electrodes, wherein the dielectric material comprises first and second dielectric fillers disposed in an insulating polymer matrix such that the change in capacitance of the dielectric does not vary by more than +/−0.5% in the temperature range of −30° C. to 60° C. and the high voltage capacitor has a withstand voltage of at least 50 kV.

公开(公告)号：US20190237260A1

公开(公告)日：2019-08-01

申请号：US16063326

申请日：2016-12-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Gunther A.J. STOLLWERCK ,  Mark GRAVERMANN ,  Jens WEICHOLD ,  Andreea SABO

IPC: H01G4/258 ,  H01G4/224 ,  H01G4/18 ,  H01G4/28 ,  H01G4/012 ,  H01G4/40 ,  G01R15/16

CPC classification number: H01G4/258 ,  G01R15/06 ,  G01R15/16 ,  H01G4/012 ,  H01G4/18 ,  H01G4/20 ,  H01G4/224 ,  H01G4/255 ,  H01G4/28 ,  H01G4/35 ,  H01G4/40

Abstract: A capacitor comprises an electrically conductive cylinder, an electrically conductive or semi-conductive cylindrical shell or shell segment arranged concentrically around the electrically conductive cylinder, and a dielectric arranged between the electrically conductive cylinder and the electrically conductive or semi-conductive cylindrical shell or shell segment. The dielectric comprises at least one dielectric layer having a positive thermal coefficient of relative permittivity, and at least one compensation dielectric layer having a negative thermal coefficient of relative permittivity. The thermal coefficient of relative permittivity is thereby selected such that the capacitance value of the capacitor is constant within a stability margin over a predefined temperature interval.