公开(公告)号：US20250062242A1

公开(公告)日：2025-02-20

申请号：US18723325

申请日：2022-11-30

Applicant: Hitachi Energy Ltd

Inventor： Fabian FISCHER ,  Milad MALEKI ,  Harald BEYER

IPC: H01L23/538 ,  H01L21/48 ,  H01L23/00 ,  H01L25/065

Abstract: A power module (1) comprising at least one substrate (2), at least one switching device (3) located on the substrate (2), at least one power path (6) for supplying power to the at least one switching device (3) and at least one auxiliary path (7, 10) for controlling and/or monitoring the switching device (3), wherein the at least one auxiliary path (7, 10) comprises at least one connection portion (9, 12, 17, 18, 19) that comprises two or more connectors (8, 11, 20) electrically connected in parallel. wherein the power module (1) comprises several switching devices (3) having corresponding auxiliary paths (7, 10), wherein at least one of the corresponding auxiliary paths (7, 10) comprises a connection portion (9, 12, 17, 18, 19) with parallel connectors (8, 11. 20) and wherein at least another one of the corresponding auxiliary paths (7, 10) comprises a connection portion (9, 12, 17, 18, 19) with parallel connectors (8, 11, 20) or comprises a connection portion (13) with a single connector, wherein the number of the connectors (8, 11, 20) is different in

公开(公告)号：US12211635B2

公开(公告)日：2025-01-28

申请号：US17438424

申请日：2020-03-10

Applicant: HITACHI ENERGY LTD

Inventor： Yong Wang ,  Jens Tepper ,  Jiahua Weng

IPC: H01F27/08 ,  H01F27/02 ,  H01F27/06

Abstract: An arrangement to cool a coil, comprising an enclosure, which at least partially incorporates or houses the coil, and a device to create an airflow to cool the coil, wherein the coil comprises at least one cooling channel to guide the airflow through the windings of the coil and an outer air duct lying radially in the outer circumference area of the coil or lying radially inside below an outer part of the coil, characterized in that an air guidance plate is placed at or near one longitudinal end of the outer air duct and/or of the coil to prevent bypasses of the airflow and/or to block at least partially the airflow through and/or along the outer air duct, achieves the object to cool a coil, especially a coil of a transformer, in an efficient manner using space-saving means.

公开(公告)号：US20250004433A1

公开(公告)日：2025-01-02

申请号：US18700960

申请日：2022-10-14

Applicant: Hitachi Energy Ltd

Inventor： Pawel DAWIDOWSKI ,  James OTTEWILL ,  Jhelum CHAKRAVORTY

IPC: G05B13/04 ,  G05B13/02

Abstract: To generate a decision logic for an IED, at least one machine learning model is trained in an iterative machine learning model training. Weighting functions are used to weight samples in the iterative machine learning model training. Weighting function(s) associated with one or several training cases are automatically modified in the iterative machine learning model training.

公开(公告)号：US20240420900A1

公开(公告)日：2024-12-19

申请号：US18725237

申请日：2022-12-29

Applicant: Hitachi Energy Ltd

Inventor： Dhairyshil Ramchandra DESAI ,  Chinmay Maheshbhai DHADUK ,  Satish Baburao HAJARE

IPC: H01H3/26 ,  H02K7/00 ,  H02K7/118 ,  H02K7/14

Abstract: A high energy spring drive to control a high voltage circuit breaker is described. The high energy spring drive includes a closing assembly positioned at a first end and an opening assembly positioned at a second end, a charging assembly positioned between the closing and opening assembly, and a transmission assembly. The closing and opening assembly control the closing and opening of circuit breaker. The charging assembly includes a worm wheel arrangement coupled to a motor to transfer torque to a motor shaft, to energize the closing assembly, a decoupling mechanism to decouple the worm wheel arrangement from the motor shaft on energization of the closing assembly, and a cam-follower mechanism. The transmission assembly actuated by the follower of the cam-follower mechanism is to electrically close a circuit breaker when the follower rotates in a first direction and electrically open the circuit breaker when the follower rotates a second direction.

公开(公告)号：US12166350B2

公开(公告)日：2024-12-10

申请号：US17441487

申请日：2020-04-14

Applicant: Hitachi Energy Ltd

Inventor： Carl Byman ,  Johan Salj ,  Henrik Pind

IPC: H02J3/08 ,  G01R3/00 ,  G01R31/00 ,  H02H7/26 ,  H02J3/00 ,  H02J3/14

Abstract: There is provided mechanisms for handling time shifted data streams in a substation network. A method is performed by an IED. The method comprises receiving a respective data stream from at least two time synchronized data sources in the substation network. The method comprises blocking, upon detecting a time shift between the data streams resulting from one of the data sources losing its time synchronization and until a configured time amount has expired, a protection function in the substation network from acting based on the data streams.

公开(公告)号：US20240387125A1

公开(公告)日：2024-11-21

申请号：US18577463

申请日：2022-07-08

Applicant: Hitachi Energy Ltd

Inventor： Mahesh DHOTRE ,  Robert VOSS ,  Christoph KOLLER ,  Rijo-Jude RAPHAEL ,  Nils FURRER

IPC: H01H33/70 ,  H01H33/02 ,  H01H33/56 ,  H04N23/51

Abstract: A gas-insulated high or medium voltage circuit breaker includes: a first arcing contact and a second arcing contact, whereby at least one is axially movable along a switching axis, thereby forming an arc between the first arcing contact and the second arcing contact in an arcing region, a buffer cylinder including a channel directed to the arcing region and/or a nozzle for blowing during the breaking operation an arc-extinguishing gas to the arcing region; a first enclosure associated to first arcing contact substantially sur-rounding the buffer cylinder and arranged slidable in respect to the buffer cylinder and/or a second enclosure substantially surrounding the nozzle and arranged slidable in respect to the nozzle; and a labyrinth structure provided in the first enclosure and/or in the buffer cylinder between the first enclosure and the buffer cylinder and/or in the second enclosure and/or in the nozzle between the second enclosure and the nozzle.

公开(公告)号：US12130778B2

公开(公告)日：2024-10-29

申请号：US17616392

申请日：2020-06-05

Applicant: Hitachi Energy Ltd

Inventor： Ettore Ferranti ,  Carsten Franke ,  Thomas Locher ,  Yvonne-Anne Pignolet ,  Sandro Schoenborn ,  Thanikesavan Sivanthi ,  Theo Widmer

IPC: G06F7/00 ,  G06F16/174 ,  H03M7/30

CPC classification number: G06F16/1744 ,  H03M7/3059 ,  H03M7/6064 ,  H03M7/70

Abstract: To facilitate storage of data from plural data sources of an industrial automation control system, power distribution system or power generation system, a decision making device executes a machine learning algorithm to determine a compression technique in dependence on the data source from which data originates.

公开(公告)号：US12130321B2

公开(公告)日：2024-10-29

申请号：US17913022

申请日：2021-02-16

Applicant: Hitachi Energy Ltd

Inventor： Suresh Maturu ,  Sachin Srivastava ,  Arulselvan G ,  Od Naidu

IPC: G01R31/08 ,  G01R25/00 ,  H02H1/00 ,  H02H7/22

CPC classification number: G01R31/086 ,  G01R25/00 ,  H02H1/0007 ,  H02H7/22

Abstract: Fault detection during a power swing in a power transmission system is described. Voltage and current measurements are obtained for each phase at a terminal of the power transmission system. Based on measurements obtained, a value of change in an impedance angle for each phase-to-ground loop and each phase-to-phase loop for each sample of the voltage and current values is calculated, where the value of change in the impedance angle is a difference between impedance angles of two samples separated by a predetermined interval. The average values for change in impedance angle based on a predetermined number of values of change in the impedance angle for each phase-to-ground loop and each phase-to-phase loop is calculated. The average values are compared with a threshold range of change in impedance angle. Based on the comparison, a fault in one or more of the phase-to-ground loops or phase-to-phase loops is detected and classified.

公开(公告)号：US12125767B2

公开(公告)日：2024-10-22

申请号：US18564532

申请日：2022-04-20

Applicant: HITACHI ENERGY LTD

Inventor： Lluis Santolaria ,  Dominik Truessel ,  Harald Beyer

IPC: H01L23/40 ,  H01L21/48

CPC classification number: H01L23/4006 ,  H01L21/4871 ,  H01L2023/4087

Abstract: A clamping element (9) is specified configured to be pressed to a baseplate (2) of at least one power semiconductor module (1) comprising a mold (4), comprising —at least one contact area (10) being configured to be in direct contact to at least one clamping area (7) of the baseplate (2) being free of the mold (4), and —at least one recess (11) provided in the baseplate, wherein —the recess (11) and the contact area (10) are configured to face the baseplate. Further, a method for producing a power semiconductor device is specified.

公开(公告)号：US12119655B2

公开(公告)日：2024-10-15

申请号：US18568549

申请日：2021-06-08

Applicant: Hitachi Energy Ltd

Inventor： Ying-Jiang Hafner

IPC: H02J3/36 ,  H02J3/28 ,  H02J7/00 ,  H02M3/158

CPC classification number: H02J3/36 ,  H02J3/28 ,  H02J7/00712 ,  H02M3/158 ,  H02J2207/50

Abstract: An energy supporting device for a high voltage direct current, HVDC, transmission system is provided. The HVDC transmission system includes a first HVDC converter and a second HVDC converter connected to each other via an HVDC link. The energy supporting device comprises a plurality of cells configured to be connected in series to the HVDC link, a resistor electrically connected between the plurality of cells and an electrical reference potential, and a bypass switch configured to allow the resistor to be bypassed. A cell includes a full-bridge arrangement of power switches and an energy storage device electrically connected to the full-bridge arrangement. The energy supporting device is configured to be operated in: a charging mode, in which the bypass switch is in a closed state for allowing the resistor to be bypassed, and in which the energy storage device of at least one cell of the plurality of cells is receiving electrical energy from the HVDC link, and in a dissipation mode, in which the bypass switch is in an open state for allowing the resistor to dissipate electrical energy from the HVDC link, and in which the energy storage devices of the plurality of cells are bypassed, and in an energy release mode, in which the energy storage device of at least one cell of the plurality of cells is discharging electrical energy to the HVDC link.