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公开(公告)号：US20230152833A1
公开(公告)日：2023-05-18
申请号：US18096123
申请日：2023-01-12
发明人： Jon A. BICKEL
CPC分类号： G05F1/66 , G01R31/12 , G01R31/088 , G05B13/048 , G05B23/027 , H02H7/20 , H02H9/042
摘要： A method for reducing and/or managing energy-related stress in an electrical system includes processing electrical measurement data from or derived from energy-related signals captured by at least one intelligent electronic device (IED) in the electrical system to identify and track at least one energy-related transient in the electrical system. An impact of the at least one energy-related transient on equipment in the electrical system is quantified, and one or more transient-related alarms are generated in response to the impact of the at least one energy-related transient being near, within or above a predetermined range of the stress tolerance of the equipment. The transient-related alarms are prioritized based in part on at least one of the stress tolerance of the equipment, the stress associated with one or more transient events, and accumulated energy-related stress on the equipment. One or more actions are taken in the electrical system in response to the transient-related alarms to reduce energy-related stress on the equipment in the electrical system.
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公开(公告)号：US20230147732A1
公开(公告)日：2023-05-11
申请号：US17915342
申请日：2021-05-18
发明人： Toyoshi KONDO
CPC分类号： G01R31/343 , G01K11/12 , G01K5/56 , G01R31/1209 , G08C17/02
摘要： A load test device includes: a resistor unit that includes a plurality of resistors that receive supplied power and a wall (holding frame) that holds opposite ends of each of the plurality of resistors; and an insulating cap that is attached to a portion of a terminal of the resistor that protrudes from the wall. The cap is composed of a material that is deformed by heat. When a temperature of the terminal becomes equal to or higher than a first temperature, the cap is deformed by heat and detached from the terminal.
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公开(公告)号：US20230142533A1
公开(公告)日：2023-05-11
申请号：US17915451
申请日：2021-03-25
CPC分类号： G01R31/16 , G01R31/1263
摘要： An insulation inspection device includes: a conveyance unit that conveys a laminated electrode in which a first separator, a first electrode plate, a second separator, and a second electrode plate are laminated; a pressure roll that presses the laminated electrode against the conveyance unit; a first terminal electrically connected to the first electrode plate; a second terminal electrically connected to the second electrode plate, further electrically connected to the conveyance unit when the first separator is disposed on the conveyance unit side, and further electrically connected to the pressure roll when the first separator is disposed on the pressure roll side; and an insulation inspection unit that applies a voltage to the laminated electrode to inspect insulation condition of the laminated electrode.
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公开(公告)号：US20230115294A1
公开(公告)日：2023-04-13
申请号：US17448990
申请日：2021-09-27
摘要： Methods and systems for detecting partial discharge in a stator for an electric motor are provided. An exemplary method includes applying a high voltage AC sinewave input signal to the stator and energizing at least one winding therein. The method includes sensing a first resulting load signal occurring in the stator with a first device and filtering the first resulting load signal to form a first high frequency signal indicating any partial discharge (PD) voltage occurring in the stator. The method also includes sensing a second resulting load signal occurring in the stator with a second device and filtering the second resulting load signal to form a second high frequency signal indicating any partial discharge voltage occurring in the stator. Further, the method includes processing the first and second high frequency signals to form a processed signal indicating whether partial discharge occurred.
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公开(公告)号：US20230099667A1
公开(公告)日：2023-03-30
申请号：US17798151
申请日：2021-09-28
发明人： Jong-Il Park
IPC分类号： G01R31/327 , G01R31/12 , B60L3/00
摘要： A relay diagnosis apparatus includes a first voltage detection circuit to generate first and second diagnosis voltages between positive and negative electrode terminals of a battery assembly and a chassis, respectively; and a controller to determine first and second insulation resistances between the positive and negative electrode terminals and the chassis, respectively, based on the first and second diagnosis voltages at first and second time points while respective relays are controlled into an off-state. The controller determines third and fourth insulation resistances between the positive and negative electrode terminals and the chassis, respectively, based on the first and second diagnosis voltages at third and fourth time points while the first and second relays are controlled into an on-state. The controller detects relay faults based on the insulation resistances.
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公开(公告)号：US11604217B2
公开(公告)日：2023-03-14
申请号：US16857482
申请日：2020-04-24
发明人： Jun Liu , Yingying Feng , Jinzhu Xu , Yuanzhao Zhang
摘要： The present invention discloses an insulation detection circuit and a detection method thereof for a two-way on-board charger. The detection circuit comprises an inverter circuit, a first Y capacitor connected between an output live line and a ground line of the inverter circuit, a second Y capacitor connected between an output neutral line and the ground line of the inverter circuit, a live line sampling circuit and a neutral line sampling circuit which are connected with the output live line and the output neutral line of the inverter circuit, and a controller. The controller determines an insulation state of the two-way on-board charger according to two sampling voltages.
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公开(公告)号：US20230059561A1
公开(公告)日：2023-02-23
申请号：US17819905
申请日：2022-08-15
摘要： A system to enable identification of arcing hazards comprises a data storage to store a set of measurements acquired by measurement units of a power distribution system. The system further comprises at least one processor configured to identify candidate arcing events represented by the measurements by using an unsupervised machine learning process, and to train a supervised machine learning classifier for automatic real-time identification of arcing events, by using labeled training data based on the identified candidate arcing events.
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公开(公告)号：US20230041663A1
公开(公告)日：2023-02-09
申请号：US17816728
申请日：2022-08-02
发明人： Lifeng QIAO , Dehui ZHANG , Teng LIU
摘要： The disclosure discloses a method and device for monitoring partial discharge. The monitoring method including: step a, connecting a monitoring circuit in parallel to both ends of a tested product, disposing a ground wire between the monitoring circuit and ground, disposing a first sensor in the monitoring circuit, and disposing a ground wire sensor on the ground wire; step b, applying an excitation signal to the tested product, acquiring a first signal through the first sensor and acquiring a ground wire signal through the ground wire sensor within a monitoring cycle; and step c, determining whether the tested product has partial discharge through the first signal and the ground wire signal. The disclosure can avoid the partial discharge monitoring device from wrongly determining an interference signal to be a partial discharge signal, enhance anti-interference capability of the partial discharge monitoring device, and improve monitoring accuracy.
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公开(公告)号：US11575312B2
公开(公告)日：2023-02-07
申请号：US16930329
申请日：2020-07-16
发明人： Yicong Xie , Weiqiang Zhang , Peng Ma , Wei Zhou
摘要： Embodiments of the present disclosure provide an insulation monitoring device applied to a power system and a power system. The power system includes at least one power electronic converter module. The insulation monitoring device includes an insulation component, a signal source, an impedance module, and a monitoring module. The insulation component at least partially wraps around the power electronic converter module. The signal source is electrically coupled to a circuit node in the power electronic converter module, the impedance module is connected between the signal source and the insulation component, and the monitoring module is configured to monitor an insulation resistance value of the insulation component, so that an insulation state of the power electronic converter module may be determined.
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公开(公告)号：US11573258B1
公开(公告)日：2023-02-07
申请号：US17402770
申请日：2021-08-16
IPC分类号： G01R31/12 , G01R31/327
摘要： An apparatus for testing insulated high voltage devices includes a first ground plane connected to a reference voltage potential having a first plurality of resiliently compressible conductive fibers extending therefrom and a second ground plane connected to the reference voltage potential having a second plurality of resiliently compressible conductive fibers extending therefrom. The first and second ground planes are arranged to receive an insulated high voltage device under test connected to a voltage potential greater or less than the reference voltage potential between them and configured such that at least a portion of the first and second pluralities of resiliently compressible conductive fibers are in compressive contact with the insulated high voltage device under test. A method of testing insulated high voltage devices is also presented herein.
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