公开(公告)号：US11264890B2

公开(公告)日：2022-03-01

申请号：US16859848

申请日：2020-04-27

Applicant: PANASONIC CORPORATION

Inventor： Takuya Ishii ,  Tetsuya Mihashi ,  Ginga Katase ,  Takashi Ryu

IPC: H02M1/32 ,  H02H7/20 ,  H02H3/20 ,  H02H1/00 ,  H02H9/02 ,  H02H3/08 ,  G05F1/10

Abstract: A power supply protection circuit is a circuit that controls a protection switch provided on a power supply line connecting a direct current power supply and a load circuit. The power supply protection circuit includes: circuitry connected to the protection switch; and a controller that switches an operation state of the circuitry between a first state and a second state. The first state is an operation state in which driving of the protection switch is enabled when the protection switch is a first semiconductor switch having a control terminal connected to a semiconductor layer of a first conductivity type. The second state is an operation state in which driving of the protection switch is enabled when the protection switch is a second semiconductor switch having a control terminal connected to a semiconductor layer of a second conductivity type that is different from the semiconductor layer of a first conductivity type.

公开(公告)号：US11264788B2

公开(公告)日：2022-03-01

申请号：US16641934

申请日：2017-12-08

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Asjad Shamim ,  Po Yu Li ,  Qijun Chen ,  Fangyong Dai

IPC: H02H3/08 ,  H02H9/02 ,  G06F1/30 ,  H02H1/00

Abstract: An example power adaptor includes a converter and a circuit to detect an overcurrent event at the converter and to pause power output of the converter when the overcurrent event is detected. The circuit is further to count a number of overcurrent events at the converter within a time period. The circuit is further to compare the number of overcurrent events to a threshold number and to switch off the power output of the converter when the number of overcurrent events passes the threshold number.

公开(公告)号：US11257633B2

公开(公告)日：2022-02-22

申请号：US17181083

申请日：2021-02-22

Applicant: Arc Suppression Technologies

Inventor： Reinhold Henke ,  Robert Thorbus

IPC: H01H1/00 ,  G01R31/327 ,  H01H50/04 ,  G01R31/40 ,  H02H1/00 ,  H02H3/08 ,  H01H9/54 ,  H02M3/156 ,  H03K3/313 ,  H03K17/60 ,  H04W4/60 ,  G06F3/0484 ,  G06F3/04842 ,  H04L67/1095 ,  H04L67/148 ,  H01H1/50 ,  H02H3/06 ,  H02H3/087 ,  H02H7/26 ,  H02H9/02 ,  H02H9/08 ,  H03K3/45 ,  H01H47/00 ,  H01H71/04

Abstract: A power contact health assessor system includes a pair of terminals adapted to be connected to a set of switchable contact electrodes of a power contact and a contact separation detector configured to determine a time of separation of the set of switchable contact electrodes during deactivation of the power contact. The system includes a controller circuit operatively coupled to the pair of terminals and the contact separation detector. The controller circuit is configured to determine within a first observation window, a plurality of contact stick durations and an average contact stick duration. One or more additional observation windows with corresponding average contact stick durations are configured. A health assessment for the set of switchable contact electrodes may be based on a subsequent contact stick duration for a contact cycle after the first observation window and the corresponding average contact stick durations for the one or more additional observation windows.

公开(公告)号：US11249136B2

公开(公告)日：2022-02-15

申请号：US17290997

申请日：2019-10-01

Applicant: Eaton Intelligent Power Limited

Inventor： Tomas Drabek ,  Adam Gabriel

IPC: G01R31/327 ,  H02H3/33 ,  H02H3/08

Abstract: A switch includes: at least one conducting line led through the switch; switching contacts arranged in the at least one conducting line; at least one measurement transformer arranged at the at least one conducting line; an electronic trip unit, a measurement-input of the electronic trip unit being electrically connected to a measurement transformer secondary winding of a measurement transformer; a power supply unit; at least one power transformer arranged at the at least one conducting line, the at least one power transformer including a power transformer secondary winding which is electrically connected to the power supply unit in order to supply the electronic trip unit; a signal generating unit for generating a test signal with at least a first predefined frequency, with an output of the signal generating unit being electrically connected to the power transformer secondary winding; and a self-test unit electrically connected to the measurement transformer secondary winding.

公开(公告)号：US11233386B2

公开(公告)日：2022-01-25

申请号：US16287422

申请日：2019-02-27

Applicant: Google LLC

Inventor： Yao Ding ,  Hui Li

IPC: H02H3/08 ,  H02H1/00

Abstract: A short circuit protection circuit may comprise a first configuration channel line extending from a first connector, a first resistor connected to the first configuration channel line; a voltage divider connected to a junction point on the first configuration channel line, the voltage divider comprising a second resistor and a thermistor, and a field effect transistor (FET) comprising a source, gate, and drain. The thermistor may be connected to a ground line. The drain of the FET may be connected to the first resistor, the source of the FET may be connected to the ground line, and the gate of the FET may be connected to a second junction point between the second resistor and thermistor of the voltage divider.

公开(公告)号：US11217985B2

公开(公告)日：2022-01-04

申请号：US16650487

申请日：2018-09-25

Applicant: Eaton Intelligent Power Limited

Inventor： Kenan Askan

IPC: H02H3/00 ,  H02H3/08 ,  H02H1/00

Abstract: A low-voltage circuit breaker device includes: at least one line conductor path from a line conductor supply connection of the low-voltage circuit breaker device to a line conductor load connection of the low-voltage circuit breaker device; a neutral conductor path from a neutral conductor connection of the low-voltage circuit breaker device to a neutral conductor load connection of the low-voltage circuit breaker device; a mechanical bypass switch arranged in the line conductor path; a first semiconductor circuit assembly of the low-voltage circuit breaker device being connected in parallel with the mechanical bypass switch; an electronic control unit for actuating the mechanical bypass switch and the first semiconductor circuit assembly; an ammeter assembly arranged in the line conductor path, which ammeter assembly is connected to the electronic control unit; and a second semiconductor circuit assembly arranged in the line conductor path.

公开(公告)号：US20210400815A1

公开(公告)日：2021-12-23

申请号：US16906804

申请日：2020-06-19

Applicant: ABB Schweiz AG

Inventor： Giovanni Salvatore ,  Slavo Kicin

IPC: H05K1/18 ,  H05K1/02 ,  H05K3/30 ,  H05K7/20 ,  H02H1/00 ,  H02H3/08

Abstract: A solid state switching device, such as a solid state circuit breaker, includes at least one heat sink, a control electronics printed circuit board (PCB), and power electronics. The power electronics are useful to regulate the flow of current from one terminal of the solid state switching device to another terminal. The power electronics can include one or more solid state devices such as FETs, Thyristors, Thyristors+SiC JFET in parallel, IGBTs, and IGCTs. The control PCB can include a variety of circuit elements useful to perform the function of a gate driver useful to activate the solid state device of the power electronics. The control electronics can be positioned laterally to the power electronics and spanning from a heat sink positioned on one side of the power electronics to a heat sink positioned on an opposing side of the power electronics.

公开(公告)号：US11201460B2

公开(公告)日：2021-12-14

申请号：US16823830

申请日：2020-03-19

Applicant: Yazaki Corporation

Inventor： Eiichiro Oishi ,  Mitsuaki Morimoto

IPC: H02H3/08 ,  H02H9/02 ,  H02H7/20 ,  H01H47/00 ,  H02J1/00 ,  H02J7/00 ,  H03K17/082

Abstract: A power source switch control device includes a detection circuit, a detection circuit, a detection circuit, and a detection circuit. The detection circuit detects forward voltage of a body diode of a FET, and the detection circuit detects forward voltage of a body diode of a FET. The detection circuit detects forward voltage of a body diode of a FET, and the detection circuit detects forward voltage of a body diode of a FET. A controller determines whether a defect of a power circuit has occurred based on results of the detection by the detection circuits to. Accordingly, the power source switch control device can appropriately detect defect of a switching element of a power source.

公开(公告)号：US11195670B2

公开(公告)日：2021-12-07

申请号：US16934167

申请日：2020-07-21

Applicant: Arc Suppression Technologies

Inventor： Reinhold Henke ,  Robert Thorbus

IPC: H01H1/00 ,  H01H50/04 ,  G01R31/327 ,  G01R31/40 ,  H02H1/00 ,  H02H3/08 ,  H01H9/54 ,  H02M3/156 ,  H03K3/313 ,  H03K17/60 ,  H04W4/60 ,  G06F3/0484 ,  H04L29/08 ,  H01H1/50 ,  H02H3/06 ,  H02H3/087 ,  H02H7/26 ,  H02H9/02 ,  H02H9/08 ,  H03K3/45 ,  H01H47/00 ,  H01H71/04

Abstract: A power contact fault clearing device includes a first pair of terminals adapted to be connected across a first set of switchable contacts, and a second pair of terminals adapted to be connected across a second set of switchable contacts. The second set of switchable contacts coupled to an arc suppressor. A current sensor is adapted to be connected between a power load and the second set of switchable contacts. The current sensor is configured to measure a power load current associated with the power load. A controller circuit is operatively coupled to the current sensor and the first and second pairs of terminals. The controller circuit is configured to detect a fault condition based at least on the power load current, and sequence deactivation of the first set of switchable contacts and the second set of switchable contacts based on the detected fault condition.

公开(公告)号：US11170964B2

公开(公告)日：2021-11-09

申请号：US16720533

申请日：2019-12-19

Applicant: Amber Solutions, Inc.

Inventor： Mark Telefus ,  Stephen C. Gerber ,  Damon M. Baker ,  Kenneth D. Alton

IPC: H02H3/08 ,  H01H71/04 ,  H01H71/12 ,  H02H1/00 ,  H01H71/24 ,  G01R15/20 ,  H02H3/33 ,  G01R19/175 ,  H01H9/54 ,  H01H9/56 ,  H01H33/59 ,  H02J13/00 ,  H02M7/06

Abstract: A circuit breaker includes a solid-state switch, a sense resistor, a current detection circuit, and a switch control circuit. The solid-state switch and sense resistor are connected in series in an electrical path between a line input terminal and a load output terminal of the circuit breaker. The current detection circuit is configured to (i) sample a sense voltage that is generated across the sense resistor in response to load current flowing through the sense resistor, (ii) detect an over-current fault condition based on the sampled sense voltage, and (iii) output a fault detection signal in response to detecting the over-current fault condition. The switch control circuit is configured to control the solid-state switch, wherein the switch control circuit is configured to switch off the solid-state switch in response to the fault detection signal output from the current detection circuit.