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公开(公告)号：US20240380309A1
公开(公告)日：2024-11-14
申请号：US18690425
申请日：2022-09-08
Applicant: Eaton Intelligent Power Limited
Inventor： Petr KOPEJTKO
Abstract: A precharge device for DC loads comprising a switching element, a magnetic core with negatively coupled coils being switchably connected by the switching element. Moreover, the precharge device comprises capacitors with parallel diodes between the coils and ground with the forward directions pointing away from ground. In addition, the precharge device comprises a control for turning the switching element on if a total current through the coils or the absolute value of the total current drops below a first threshold value and for turning it off if it rises above a higher second threshold value. The invention also relates to an arrangement with such a precharge device a DC-grid connected to the precharge device and a load capacitor connected to the precharge device.
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公开(公告)号：US20250007285A1
公开(公告)日：2025-01-02
申请号：US18690488
申请日：2022-09-08
Applicant: Eaton Intelligent Power Limited
Inventor： Petr KOPEJTKO , Oleksij CHUMAK
Abstract: A method and a device for managing power in an AC subgrid is proposed. To do so, virtual voltages from a plurality of other devices in the AC subgrid are received and used to calculate a weighted average virtual voltage. Based on that and a droop curve, a droop current is determined. Furthermore, the frequency in the AC subgrid is measured and used to calculate a set current based on the droop current and the measured frequency. Then, the set current is set in a current control circuit of the device. Finally, an actual virtual voltage based on the droop curve and the set current is determined and sent to other devices in the AC subgrid. In addition, an AC-subgrid is disclosed, comprising a plurality of such devices, which are interconnected in terms of power and data communication.
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3.发明公开公开(公告)号：US20240290533A1
公开(公告)日：2024-08-29
申请号：US18567271
申请日：2022-06-10
Applicant: Eaton Intelligent Power Limited
Inventor： Petr KOPEJTKO
CPC classification number: H01F27/26 , H01F27/306
Abstract: A device for limiting or reducing a current rise is disclosed, which comprises a first magnetic core with at least one annular path for a magnetic flux, a first magnet arrangement having at least one permanent magnet in the at least one annular path of the first magnetic core and a first coil being wound around the first magnetic core. The at least one annular path has a first section with parallel sub paths, wherein a first sub path of the sub paths comprises a first bypass air gap and a second sub path of the sub paths is a continuous path comprising said first magnet arrangement. Further on, an arrangement with such a device and an electric circuit with such an arrangement is disclosed.
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