知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

75 records (took 0.02 seconds)

    Determine solenoid plunger position of a current controlled solenoid using position feedback
    2.
    发明授权
    Determine solenoid plunger position of a current controlled solenoid using position feedback 有权

    公开(公告)号：US11574756B2

    公开(公告)日：2023-02-07

    申请号：US16734791

    申请日：2020-01-06

    Applicant: United Technologies Corporation

    Inventor： Rajkumar Sengodan

    IPC: H01F7/18 ,  G01R31/72 ,  G01R19/00

    Abstract: Provided are embodiments for determining solenoid plunger position by performing a method which includes generating, by a first signal circuit, a first signal based at least in part on a pull-in current value of a current applied to a solenoid coil of a solenoid. The method further includes generating, by a second signal circuit, a second signal by applying a time delay to the first signal. The method further includes comparing, by a comparator circuit, the first signal and the second signal to determine whether a plunger of the solenoid has moved within the solenoid from a first position to a second position. The method further includes, responsive to determining that the plunger of the solenoid has moved within the solenoid from the first position to the second position, reducing the current applied to the solenoid coil of the solenoid from the pull-in current value to a hold current value.

    Systems, apparatus, and methods for locating a fault in a plurality of windings of a transformer
    3.
    发明授权
    Systems, apparatus, and methods for locating a fault in a plurality of windings of a transformer 有权

    公开(公告)号：US11460517B2

    公开(公告)日：2022-10-04

    申请号：US16452059

    申请日：2019-06-25

    Applicant: General Electric Technology GmbH

    Inventor： Hengxu Ha ,  Xiuda Ma

    IPC: G01R31/72 ,  H01F27/28

    Abstract: There is provided systems, apparatus, and methods for locating a fault in a plurality of windings of a transformer. In one embodiment, the apparatus may include: a measurement device configured to measure electrical flow parameters of the transformer when the transformer is in an online mode; and a fault location determination unit configured to determine electrical flow parameters of the windings from the measured electrical flow parameters of the transformer, wherein the fault location determination unit is configured to process the determined electrical flow parameters of the windings to determine the location of the fault in the windings.

    Methods and systems for fault diagnosis
    4.
    发明授权
    Methods and systems for fault diagnosis 有权

    公开(公告)号：US11150278B2

    公开(公告)日：2021-10-19

    申请号：US16023128

    申请日：2018-06-29

    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

    Inventor： Xiaolei Guan

    IPC: G01R33/36 ,  G01R19/165 ,  G01R31/28 ,  G01R31/72 ,  G01R33/3415

    Abstract: The present disclosure relates to a control system and methods implemented on the control system. The control system includes a tuning/detuning system and a diagnosis system. The tuning/detuning system includes a first voltage source, a second voltage source, one or more coil arrays, and one or more tuning/detuning circuit drivers corresponding to the one or more coils arrays, respectively. The diagnosis system includes a first current sampling circuit and a processor. The first current sampling circuit is configured to obtain a first current. The processor is configured to diagnose the tuning/detuning system based on the first current.

    Methods and devices for calculating winding currents at a delta side for a transformer
    5.
    发明授权
    Methods and devices for calculating winding currents at a delta side for a transformer 有权

    公开(公告)号：US10921386B2

    公开(公告)日：2021-02-16

    申请号：US16447933

    申请日：2019-06-20

    Applicant: ABB Power Grids Switzerland AG

    Inventor： Sandeep Pabbathi ,  Prabakaran S ,  Suresh Maturu

    IPC: G01R31/72 ,  G01R31/62 ,  H01F27/28 ,  H02H7/045

    Abstract: The present disclosure relates to methods and devices for calculating winding currents at a delta side for a transformer. The transformer has two or more windings, with a first winding being a delta connected winding. The method includes obtaining line currents measured with measurement equipment associated with lines connected with the windings. The method further includes calculating zero sequence currents for at least a second winding, from the line currents of a corresponding line. The method further includes calculating zero sequence currents for the first winding, based on the zero sequence currents for at least the second winding, a phase displacement between the windings, and a turns ratio associated with the windings. The winding currents is calculated from the zero sequence currents of the first winding, and the line currents of a corresponding line.

    DIAGNOSTIC DEVICE FOR COIL AND DIAGNOSIS METHOD FOR COIL
    7.
    发明申请
    DIAGNOSTIC DEVICE FOR COIL AND DIAGNOSIS METHOD FOR COIL 审中-公开

    公开(公告)号：US20200158790A1

    公开(公告)日：2020-05-21

    申请号：US16619854

    申请日：2018-08-31

    Applicant: AISIN AW CO., LTD.

    Inventor： Hideaki KIMURA

    IPC: G01R31/72 ,  G01R31/12 ,  G01R31/34 ,  G01R31/62

    Abstract: Provided is a diagnostic device for a coil including a voltage application unit applying an impulse voltage to the coil; a response voltage detection unit detecting a response voltage from the coil with respect to the impulse voltage; an index calculation unit calculating a determination index indicating an electrical feature of the coil based on the response voltage; and a determination unit determining whether there is an abnormality in a target coil to be diagnosed by comparing the determination index of a reference coil that is the coil that is normal and the determination index of the target coil. At least one of a zero cross point at which the response voltage intersects with a reference voltage and a peak voltage on a positive side and a negative side of the response voltage is used as the determination index, in addition to a circuit constant of the coil.

    Current sensing in a wireless power transfer system
    8.
    发明授权
    Current sensing in a wireless power transfer system 有权

    公开(公告)号：US12174269B2

    公开(公告)日：2024-12-24

    申请号：US18080642

    申请日：2022-12-13

    Applicant: InductEV, Inc.

    Inventor： John M. Wolgemuth ,  Benjamin H. Cohen ,  Daniel S. Hackman

    IPC: G01R31/72 ,  G01R19/02 ,  G01R19/25

    Abstract: A current sensing method measures a fractional current through a coil having a plurality of coil windings by using a current sensing resistor to measure a current through a subset of the plurality of coil windings and using a voltage sensor to measure a voltage drop across the current sensing resistor. The measured current and voltage values are provided to a processor to determine the fractional current and phase of the coil. For example, the fractional current and phase of the coil may be determined by calculating a total current of the coil as I=n(V/Rx), where n is the number of coil windings of the coil, V is the measured voltage, and Rx is the impedance of the current sensing resistor. The coil may be a secondary winding used in a wireless power transfer system.

    Testing instrument and test method
    9.
    发明授权
    Testing instrument and test method 有权

    公开(公告)号：US12066505B2

    公开(公告)日：2024-08-20

    申请号：US17811977

    申请日：2022-07-12

    Applicant: HIOKI E.E. CORPORATION

    Inventor： Tadashi Iijima

    IPC: G01R31/72 ,  G01R31/34

    CPC classification number: G01R31/72 ,  G01R31/346

    Abstract: The characteristics of a winding to be tested is allowed to be analyzed more easily and in a shorter time. A testing instrument 1 includes an impulse voltage application capacitor Cs having one end connected to an external terminal T2, a switch SW and a current limiting resistor Rs connected in series between another end of the impulse voltage application capacitor Cs and an external terminal T1, and a parameter calculator 5. The parameter calculator 5 calculates at least one of the value of the equivalent capacitor Cd, the value of the equivalent inductor Ld and the value of the equivalent resistor Rd by performing regression analysis using a measured value of a voltage Vcd in an analysis time period Ta from turning on of the switch SW to start of resonance based on the equivalent inductor Ld, the equivalent capacitor Cd and the equivalent resistor Rd pertaining to a winding 11.

Patent Agency Ranking