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531 条记录 (耗时 0.016 秒)

    ARC DETECTION METHOD FOR PERFORMING PROTECTION IN ENERGY STORAGE SYSTEM, AND RELATED APPARATUS
    2.
    发明公开
    ARC DETECTION METHOD FOR PERFORMING PROTECTION IN ENERGY STORAGE SYSTEM, AND RELATED APPARATUS 审中-实审

    公开(公告)号：EP4339626A2

    公开(公告)日：2024-03-20

    申请号：EP23200448.1

    申请日：2020-02-19

    申请人： Huawei Digital Power Technologies Co., Ltd.

    发明人： ZHANG, Yanzhong ,  MENG, Yuandong ,  CHEN, Baiyu

    IPC分类号： G01R23/16

    摘要： Embodiments of this application disclose an arc detection method for performing protection in an energy storage system, and a related apparatus, to improve accuracy of arc detection in an energy storage system, promptly take an arc extinguishing measure, and reduce a probability of causing a safety hazard. The method in the embodiments of this application includes: A control apparatus obtains an electrical signal at an electrical connection point in an energy storage system. The control apparatus determines a frequency domain amplitude based on a frequency domain characteristic of the electrical signal. When the frequency domain amplitude is greater than a preset amplitude, the control apparatus controls the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point.

    SYSTEM AND METHOD FOR FILTERING RF OR MW SIGNALS
    5.
    发明公开
    SYSTEM AND METHOD FOR FILTERING RF OR MW SIGNALS 审中-公开

    公开(公告)号：EP4213397A1

    公开(公告)日：2023-07-19

    申请号：EP22151519.0

    申请日：2022-01-14

    申请人： Rohde & Schwarz GmbH & Co. KG

    发明人： Ruster, Thomas ,  Renardy, Paul

    IPC分类号： H04B1/10 ,  G01R23/16 ,  G01R29/08

    摘要： The invention relates to a system (100) for filtering a radio frequency, RF, or microwave, MW, signal (101) comprising at least one frequency band. The system comprises at least one gas based quantum sensor (103, 1) which is arranged to receive the RF or MW signal (101), wherein the gas based quantum sensor (103, 1) is configured to measure a spectrum (203) of the RF or MW signal (101) in a determined frequency range; a processing unit (105) which is configured to analyze said spectrum (203) to detect if a signal strength of one or more frequency bands of the RF or MW signal (101) within the frequency range exceed a predefined threshold; and an adjustable filter unit (107) which is arranged to receive and to filter the RF or MW signal (101); wherein the processing unit (105) is configured to adapt a filter function of the adjustable filter unit (107) based on the analysis of the spectrum (203).

    FREQUENCY DETECTION CIRCUIT
    10.
    发明公开
    FREQUENCY DETECTION CIRCUIT 审中-公开

    公开(公告)号：EP3896465A1

    公开(公告)日：2021-10-20

    申请号：EP19911540.3

    申请日：2019-01-22

    申请人： MITSUBISHI ELECTRIC CORPORATION

    发明人： WADA, Osamu ,  TAJIMA, Kenichi

    IPC分类号： G01R23/02 ,  G01R13/34 ,  G01R23/16

    摘要： Conventional frequency detection circuits have a disadvantage that the circuit scale increases as the frequency of a reception signal to be detected increases.
    A frequency detection circuit of the present invention includes: a first signal source for outputting a first clock signal; a second signal source for outputting a second clock signal having the same frequency as but a different phase from those of the first clock signal; a first sample hold circuit for undersampling a reception signal using the first clock signal; a second sample hold circuit for undersampling the reception signal using the second clock signal; and a frequency calculating circuit for calculating the frequency of the reception signal using a phase difference between output signals of the first sample hold circuit and the second sample hold circuit.