-
公开(公告)号：US20240361387A1
公开(公告)日：2024-10-31
申请号：US18649510
申请日：2024-04-29
发明人： Ning Guo , Abdul Raheem Beyah , Morris Cohen , Lukas Graber , Roderick Gray , Samuel Neall , Kevin Whitmore
IPC分类号： G01R31/327 , G01R35/00
CPC分类号： G01R31/3274 , G01R31/3275 , G01R35/005
摘要： An example method of estimating an arc duration in a circuit breaker includes receiving a first measurement corresponding to a low-frequency electric field emitted from a vacuum circuit breaker during an interruption or circuit break operation and a second measurement corresponding to a low-frequency magnetic field, vibration, or acoustic emitted by the vacuum circuit breaker during operation, aligning the first measurement and the second measurement in time, wherein the first measurement is calibrated according to a first physical constant and wherein the second measurement is calibrated according to a second physical constant; and determining, by a sensor-fusion algorithm or a trained AI model, an estimated duration value of an arc duration using the time-aligned first measurement and second measurement, wherein the arc duration corresponds to a first time corresponding to a separation of contacts of the vacuum circuit breaker and a second time corresponding to arc extinction.
-
公开(公告)号：US12111359B2
公开(公告)日：2024-10-08
申请号：US17550251
申请日：2021-12-14
发明人： Jagdambika P. Srivastava , Prasad A. Venikar , Joshua David Myers , Mark A. Gould , Charlie Hume
IPC分类号： G01R31/327
CPC分类号： G01R31/3275
摘要： A method of monitoring joint and contact conditions in an automatic transfer switch includes: collecting electrical signals at a plurality of measurement locations associated with a plurality of power sources and a load over a predetermined period, the electrical signals including voltages and load current; obtaining deltas between source voltages and corresponding load voltage measured at the measurement locations over the predetermined period; comparing the deltas with thresholds obtained during healthy condition; determining that the deltas fall outside of the thresholds; and in response to determining that the deltas fall outside of the threshold, transmitting an alert to a user, the alert indicating a detection of one or more failure modes at the measurement locations.
-
公开(公告)号：US12111357B2
公开(公告)日：2024-10-08
申请号：US17283271
申请日：2018-12-12
发明人： Katsuhiko Fujioka
IPC分类号： G01R31/327 , G06F3/06 , H01H9/54
CPC分类号： G01R31/327 , G06F3/0619 , G06F3/0659 , G06F3/0673 , H01H9/54
摘要： A diagnostic apparatus diagnoses a symptom of anomaly in a device that operates for making or breaking a circuit. The diagnostic apparatus includes a factor probability calculation unit that calculates a factor probability. The factor probability calculation unit calculates a factor probability for each matter that may be a factor in a symptom observed in the device, the factor probability being a probability that the matter truly corresponds to a factor for the observed symptom. The diagnostic apparatus can obtain useful information for improving the operating state of the device.
-
4.发明授权公开(公告)号：US12105156B2
公开(公告)日：2024-10-01
申请号：US17679020
申请日：2022-02-23
发明人： Kunio Matsubara , Ryoga Kiguchi
IPC分类号： G01R31/52 , G01R15/18 , G01R19/165 , G01R31/327 , H03K17/687
CPC分类号： G01R31/52 , G01R15/181 , G01R19/16566 , G01R31/327 , H03K17/687
摘要： There is provided a short circuit determination apparatus including: a sensor configured to detect, in a switching device that has a control terminal, a first main terminal, and a second main terminal, a temporal change of a main current flowing between the first main terminal and the second main terminal; and a short circuit determination unit configured to determine that the switching device is short-circuited, in a case where the temporal change of the main current is larger than or equal to a first threshold value, after a first timing after a control signal for driving the control terminal is turned on.
-
公开(公告)号：US20240319276A1
公开(公告)日：2024-09-26
申请号：US18441833
申请日：2024-02-14
发明人： Duck-Hyun KIM , Giho SEO , Kwangmin YOO , Kyosung KOO
IPC分类号： G01R31/327 , G01R27/08 , H01M10/42 , H01M10/48 , H01M50/204
CPC分类号： G01R31/327 , G01R27/08 , H01M10/425 , H01M10/482 , H01M50/204 , H01M2010/4278
摘要： One or more embodiments provide a switch diagnosis device including: a switch in a current path at a high voltage side; a voltage-sensing circuit configured to generate a voltage signal by sensing a voltage across the switch at the high voltage side; a current-sensing circuit configured to generate a current signal by detecting a current flowing through the current path; a controller configured to: receive the voltage signal and the current signal, calculate contact resistance of the switch based on the received voltage signal and the received current signal, and diagnose a deterioration state of the switch based on the calculated contact resistance; and a first isolated communication circuit configured to transfer the voltage signal outputted from the voltage-sensing circuit to the controller at a low voltage side that is galvanically isolated from the high voltage side.
-
公开(公告)号：US12085614B1
公开(公告)日：2024-09-10
申请号：US18196743
申请日：2023-05-12
申请人： Bruce Hack
发明人： Bruce Hack
IPC分类号： G01R31/327 , G01R15/06 , G01R15/18 , H02H7/22
CPC分类号： G01R31/3271 , G01R15/06 , G01R15/181 , H02H7/222
摘要： A device for protecting, controlling, and monitoring electrical medium range switchgear comprising use of a Rogowski coil embedded in the bottle of a switchgear and surrounding the Mains flow of voltage and current, a capacitive or similar voltage divider, also surrounding the Mains and extending around the bottle, and providing analog signals from those devices to an integrated circuit for conversion to digital signals, and then transmitting as output the digital signals to a data accumulator where the same are optionally time stamped and compared to one another, to a standard or to themselves at a different time.
-
公开(公告)号：US20240280635A1
公开(公告)日：2024-08-22
申请号：US18570157
申请日：2022-03-22
申请人： Hitachi, Ltd.
发明人： Takashi ENDO , Takeshi IWATA , Toshiaki ROKUNOHE , Hikaru KOYAMA , Kota DOHI
IPC分类号： G01R31/327 , H04R3/00
CPC分类号： G01R31/327 , H04R3/00
摘要： The acoustic diagnosis device extracts a second feature amount of an acoustic signal in which a delay of an acoustic signal collected by the microphone is corrected, the delay being generated from a relative distance between the circuit breaker and the microphone, during diagnosis of the circuit breaker, calculates a similarity between the second feature amount of the acoustic signal during the diagnosis and the first feature amount in the plurality of event models for each time, estimates the time at which the similarity becomes highest, as an occurrence timing of each event, and diagnoses the circuit breaker from a plurality of estimated occurrence timings.
-
公开(公告)号：US12055589B1
公开(公告)日：2024-08-06
申请号：US18097139
申请日：2023-01-13
发明人： Thomas P. Joyce
IPC分类号： H01H47/32 , G01R31/327
CPC分类号： G01R31/3278 , H01H47/32
摘要： A low-side contactor coil drive circuit can include an input line and a first solid state switch having a first switch base, a first switch collector, and a first switch emitter. The first switch collector can be connected to the input line and the first switch emitter is connected to ground. The circuit can include a second solid state switch having a second switch base, a second switch collector, and a second switch emitter. The second switch emitter can be connected to the input line in parallel with the first switch collector. The second switch collector can be connected to the first switch base. The circuit can include a third solid state switch having a third switch gate, a third switch source, and a third switch drain. The third switch drain can be connected to the second switch base.
-
公开(公告)号：US12044735B2
公开(公告)日：2024-07-23
申请号：US17231390
申请日：2021-04-15
发明人： Steffen Aust , Martin Putz
IPC分类号： G01R31/327 , G01R27/20 , G01R31/52
CPC分类号： G01R31/3277 , G01R27/205 , G01R31/52
摘要： A method for measuring insulation resistance in an inverter that has a DC link circuit and a bridge circuit, connected to the DC link circuit, for driving an AC current via a bridge center tap is disclosed. The method includes connecting the bridge center tap to a grounding point, successively connecting, by way of the bridge circuit, the bridge center tap that is connected to the grounding point to two points of the ungrounded DC link circuit that differ in terms of voltage, and measuring the current flowing from the two points that differ in terms of voltage to the grounding point. The two points of the ungrounded DC link circuit that differ in terms of voltage are selected from a group of points that includes at least one intermediate voltage point of the DC link circuit in addition to two end points of the DC link circuit, such that the voltages present between the two points that differ in terms of voltage and the grounding point do not exceed a predefined voltage limit value.
-
公开(公告)号：US20240241176A1
公开(公告)日：2024-07-18
申请号：US18097139
申请日：2023-01-13
发明人： Thomas P. Joyce
IPC分类号： G01R31/327 , H01H47/32
CPC分类号： G01R31/3278 , H01H47/32
摘要： A low-side contactor coil drive circuit can include an input line and a first solid state switch having a first switch base, a first switch collector, and a first switch emitter. The first switch collector can be connected to the input line and the first switch emitter is connected to ground. The circuit can include a second solid state switch having a second switch base, a second switch collector, and a second switch emitter. The second switch emitter can be connected to the input line in parallel with the first switch collector. The second switch collector can be connected to the first switch base. The circuit can include a third solid state switch having a third switch gate, a third switch source, and a third switch drain. The third switch drain can be connected to the second switch base.
-
-
-
-
-
-
-
-
-
搜索结果
2159 条记录 (耗时 0.031 秒)
