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1.发明授权公开(公告)号：US12051964B2
公开(公告)日：2024-07-30
申请号：US17482683
申请日：2021-09-23
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuunosuke Araumi , Ryuji Yamada
CPC classification number: H02M1/0009 , G01R15/16 , G01R19/10 , G01R19/14 , G01R19/2513 , H02M3/33571
Abstract: A current detection circuit configured to detect a resonant current of a power supply circuit. The power supply circuit includes a resonant circuit that has an inductor and a first capacitor having a first end and a second end. The current detection circuit includes a second capacitor having a first end and a second end, and a non-linear circuit provided between the second end of the second capacitor and the second end of the first capacitor. The first end of the second capacitor is coupled to the first end of the first capacitor.
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公开(公告)号：US11626802B2
公开(公告)日：2023-04-11
申请号：US17389347
申请日：2021-07-30
Applicant: ABLIC Inc.
Inventor： Yoshiomi Shiina
Abstract: A DC-DC converter of a synchronous rectification type includes a synchronous rectification transistor and a backflow detection circuit which detects a reverse current based on a voltage across the synchronous rectification transistor. The backflow detection circuit includes a first-stage differential input circuit including a first transistor, a first resistor, a second transistor, a second resistor and a fifth transistor, and a second-stage differential input circuit including a third transistor and a fourth transistor. The fifth transistor is of a same conductive type as the synchronous rectification transistor and contains a drain connected to the other end of the first resistor with respect to an end connected to the first transistor.
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3.发明授权公开(公告)号：US11313887B2
公开(公告)日：2022-04-26
申请号：US16727324
申请日：2019-12-26
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Kei Hao
Abstract: Systems and methods for calculating load direction even under adverse environmental conditions are provided. A system may include sensing circuitry and processing circuitry. The sensing circuitry may sense a first parameter and a second parameter of the electrical waveform on the transmission line of the electric power distribution system. The processing circuitry may determine a present load direction of an electrical waveform using a first method based at least in part on the first parameter in response to detecting that the sensing circuitry is experiencing a first environmental condition. The processing circuitry may determine the present load direction of the electrical waveform using a second method based at least in part on the second parameter and not the first parameter in response to detecting that the sensing circuitry is experiencing a second environmental condition.
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公开(公告)号：US20220069774A1
公开(公告)日：2022-03-03
申请号：US17522865
申请日：2021-11-09
Applicant: Shenzhen Goodix Technology Co., Ltd.
Inventor： Ahmed Emira , Siavash Yazdi , Kaveh Moazzami
Abstract: Techniques are described for using valley detection for supply voltage modulation in power amplifier circuits. Embodiments operate in context of a power amplifier circuit configured to be driven by a supply voltage generated by a supply modulator and to receive an amplitude-modulated (AM) signal at its input. The output of the power amplifier circuit can be fed to a valley detector that can detect a valley level corresponding to the bottom of the envelope of the AM signal. The detected valley level can be fed back to the supply modulator and compared to a constant reference. In response to the comparison, the supply modulator can vary the supply voltage to the power amplifier circuit in a manner that effectively tracking the envelope of the power amplifier circuit's output signal, thereby effectively seeking a flat valley for the output signal's envelope.
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公开(公告)号：US11190141B2
公开(公告)日：2021-11-30
申请号：US16916155
申请日：2020-06-30
Applicant: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Inventor： Ahmed Emira , Siavash Yazdi , Kaveh Moazzami
Abstract: Techniques are described for using valley detection for supply voltage modulation in power amplifier circuits. Embodiments operate in context of a power amplifier circuit configured to be driven by a supply voltage generated by a supply modulator and to receive an amplitude-modulated (AM) signal at its input. The output of the power amplifier circuit can be fed to a valley detector that can detect a valley level corresponding to the bottom of the envelope of the AM signal. The detected valley level can be fed back to the supply modulator and compared to a constant reference. In response to the comparison, the supply modulator can vary the supply voltage to the power amplifier circuit in a manner that effectively tracking the envelope of the power amplifier circuit's output signal, thereby effectively seeking a flat valley for the output signal's envelope.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11009531B2
公开(公告)日：2021-05-18
申请号：US16841782
申请日：2020-04-07
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akihiro Otaka , Tomonori Nakamura
IPC: G01R19/14 , G01R31/311 , G01N27/72 , G01N21/41 , G01R31/26
Abstract: An image generating device is an apparatus for acquiring an image which shows a direction of an electric current flowing through a semiconductor device. The image generating device comprises a signal application unit configured to apply a stimulation signal to the semiconductor device, a magnetic detection unit configured to output a detection signal based on a magnetism generated by an application of the stimulation signal, and an image generation unit configured to generate phase image data comprising a phase component which indicates a phase difference based on the phase difference between the detection signal and a reference signal which is generated based on the stimulation signal and generate an electric current direction image which shows the direction of the electric current based on the phase image data.
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公开(公告)号：US20210103330A1
公开(公告)日：2021-04-08
申请号：US16596052
申请日：2019-10-08
Applicant: DELL PRODUCTS, LP
Inventor： Geroncio O. Tan , Merle J. Wood, III , Marcin M. Nowak , Wei-Cheng (Jason) Yu , Tsung-Cheng (Anson) Liao
IPC: G06F1/3296 , G06F1/26 , G01R19/14
Abstract: An information handling system (IHS) includes a source load switch connected to a power management circuit, and a port for connection of a device. The IHS detects attachment of the device to the port, and determines whether the device is a current sink. When the device is a current sink, the IHS sets the peak processor power level to a reduced level, determines detachment of the device, and in response to determining detachment of the device, restores a maximum peak processor power level. When the device is not a current sink, the HIS starts charging, sets a dynamic peak processor power level to an AC+DC setting, determines detachment of the device, and in response to determining detachment of the device, sets the peak processor power level to a DC-only setting.
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公开(公告)号：US20210083478A1
公开(公告)日：2021-03-18
申请号：US16571983
申请日：2019-09-16
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Kei Hao , Mark W. Feltis , Naresh Malla
Abstract: The present disclosure relates to controlling a capacitor bank using current measurements from different current sensors depending on the power flow direction. For example, the system may perform capacitor bank control operations using current measurements from a first current sensor coupled to the power line between an initial source and the capacitor bank when power is flowing in a first power flow direction on the power line. The system may determine that power flow on the power line has changed from flowing in the first power flow direction to flowing in a second power flow direction from an updated source, different from the initial source. The system may, upon detecting the change in the power flow direction perform control operations of the capacitor bank using current measurements from a second current sensor between an updated source and the capacitor bank.
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公开(公告)号：US10768212B2
公开(公告)日：2020-09-08
申请号：US15622348
申请日：2017-06-14
Applicant: Cooper Technologies Company
Inventor： Michael McClintock Sharp , Perry Lynn Baesler , Jay Edward Tolle , Aaron Thomas Beckius , Garrett DeZeeuw
Abstract: A system for detecting electricity theft with an integrity checks analysis includes a graphical user interface (GUI) configured to display information related to a flow of electricity within a power distribution system and a controller in communication with the GUI. The controller is configured to receive electrical readings taken by a plurality of electricity meters and examine the electrical readings of the plurality of electricity meters for electricity theft indicators. The controller is also configured to determine a probability that electricity is being stolen at each of the plurality of electricity meters according to any electricity theft indicators affiliated therewith and output each probability to the GUI for display.
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公开(公告)号：US10673230B2
公开(公告)日：2020-06-02
申请号：US15569860
申请日：2016-04-26
Applicant: General Electric Technology GmbH
Inventor： Robin Gupta , Robert Stephen Whitehouse
IPC: H02H7/26 , G01R19/14 , G01R31/02 , H02H3/06 , H02J3/36 , H02M5/458 , H02M1/32 , G01R31/50 , H02H3/16
Abstract: A bipolar DC power transmission scheme comprises: DC poles, each including a respective power transmission medium extending between two ends; a plurality of converters, wherein each end of the power transmission medium of the first pole is respectively operatively connected to a converter, and each end of the power transmission medium of the second pole is respectively operatively connected to a converters; a controller programmed to block one or more of the converters in response to a fault occurring on either of the first and second poles; and a monitoring device configured to identify the faulty poles on which the fault has occurred, wherein the controller is further programmed to deblock the or each blocked converter connected to the other of the poles after the monitoring device has identified the faulty one of the poles on which the fault has occurred.
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