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公开(公告)号：US11486902B2
公开(公告)日：2022-11-01
申请号：US17250090
申请日：2019-06-06
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Michael H. Stalder , Hermanus Franciscus Maria van Meijl , Joerg Hahn , Lars Schrix
Abstract: Impedance assembly (120) for use in a voltage divider for sensing an AC elevated voltage of at least 1 kV of a power-carrying conductor (10) distributing electrical energy in a national grid. The impedance assembly comprises a) a PCB (170); b) a high-voltage contact (80) for connection to the power-carrying conductor; c) a first plurality of impedance elements (70) on the PCB, connected to the high-voltage contact and in series with each other such as to be operable in a first voltage divider (20) for sensing the voltage of the power-carrying conductor; and d) a second plurality of impedance elements (71) on the PCB, connected to the high-voltage contact and in series with each other such as to be operable in a second voltage divider (21) for harvesting electrical energy from the power-carrying conductor.
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公开(公告)号：US20250035473A1
公开(公告)日：2025-01-30
申请号：US18717047
申请日：2022-12-09
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Joerg Hahn , Knut Schumacher , Benjamin Muenstermann , Robert J. Bialluch , Waleri Wischnepolski , Christian Weinmann , Michael Bahners , David M. Rudek , John A. Merchant , Alissa P. Wenner , Patrick G. Zimmerman , Vincent Jusuf , Kyle R. Hubbs , Max Kontak , Brijesh Gupta Chagi Ramesh , Robert J. Koch , Andreas M. Geldmacher , Marcus Saurborn , Kalc C. Vang
Abstract: An electrical property sensor is presented that includes a printed circuit board with a first face separated from a second face by a thickness, the first face having a length and a width. The sensor also includes an aperture extending from a first face of the printed circuit board to a second face of the printed circuit board. The aperture includes a receiving electrode and a transmitting electrode. When a fluid flows through the aperture and a voltage is provided at the transmitting electrode, a cunent flow is measured at the receiving electrode.
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公开(公告)号：US20230384350A1
公开(公告)日：2023-11-30
申请号：US18321241
申请日：2023-05-22
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Mark Gravermann , Gunther A. J. Stollwerck , Jens Weichold , Christine B. Bund , Mirco Gunjaca , Rainer Reeken , Martin A. Milek , Sebastian Eggert-Richter , Joerg Hahn , Michael H. Stalder , Christian Weinmann , Holger J. Kurzhals , Christopher R. Wilson
CPC classification number: G01R15/06 , G01R19/0084
Abstract: A voltage sensor for sensing an AC voltage of a HV/MV power conductor comprises a capacitive voltage divider for sensing the AC voltage having one or more high-voltage capacitors electrically connected in series with each other and a low-voltage portion comprising one or more low-voltage capacitors electrically connected with each other between the high-voltage portion and electrical ground. The voltage divider also comprises a signal contact, electrically arranged between the high-voltage portion and the low-voltage portion, for providing a signal voltage indicative of the AC voltage. The low-voltage portion further comprises a plurality of electrically actuated adjustable impedance elements configured to adjust the common overall impedance of the low-voltage portion towards a desired impedance. Each electrically actuated adjustable impedance element comprises one or more associated adjustment capacitors and at least one electrically actuatable element, wherein each electrically actuatable element is associated with and electrically connected to one or more of the adjustment capacitors and wherein each electrically actuatable element is configured to achieve one of a connected state and a disconnected state. In the connected state, an associated adjustment capacitor is electrically connected in parallel to at least one of the one or more low-voltage capacitors. In the disconnected state, the associated adjustment capacitor is electrically disconnected from the low-voltage capacitor(s).
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公开(公告)号：US20210199697A1
公开(公告)日：2021-07-01
申请号：US17250090
申请日：2019-06-06
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Michael H. Stalder , Hermanus Franciscus Maria van Meijl , Joerg Hahn , Lars Schrix
Abstract: Impedance assembly (120) for use in a voltage divider for sensing an AC elevated voltage of at least 1 kV of a power-carrying conductor (10) distributing electrical energy in a national grid. The impedance assembly comprises a) a PCB (170); b) a high-voltage contact (80) for connection to the power-carrying conductor; c) a first plurality of impedance elements (70) on the PCB, connected to the high-voltage contact and in series with each other such as to be operable in a first voltage divider (20) for sensing the voltage of the power-carrying conductor; and d) a second plurality of impedance elements (71) on the PCB, connected to the high-voltage contact and in series with each other such as to be operable in a second voltage divider (21) for harvesting electrical energy from the power-carrying conductor.
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