中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

13 records (took 0.022 seconds)

    Attenuating harmonic current in power transmission lines
    1.
    发明授权
    Attenuating harmonic current in power transmission lines 有权

    公开(公告)号：US12015353B1

    公开(公告)日：2024-06-18

    申请号：US17571151

    申请日：2022-01-07

    Applicant: Smart Wires Inc.

    Inventor： Govind Chavan

    IPC: H02M7/219 ,  H02M1/12 ,  H02M7/757

    CPC classification number: H02M7/219 ,  H02M1/12 ,  H02M7/7575

    Abstract: A series connectable power flow module is for connection to a power transmission line. The module has a full bridge inverter and a controller. The full bridge inverter has inputs for controlling charging and discharging a DC link capacitor. The controller is coupled to the inputs of the full bridge inverter. The controller is configured to separate a harmonic current from a line current flowing in the power transmission line. The controller operates the full bridge inverter in accordance with the separated harmonic current, to attenuate the harmonic current flowing in the power transmission line through injection of a DC link capacitor voltage.

    Powering an impedance injection unit during startup operations
    2.
    发明授权
    Powering an impedance injection unit during startup operations 有权

    公开(公告)号：US12184162B1

    公开(公告)日：2024-12-31

    申请号：US17249278

    申请日：2021-02-25

    Applicant: Smart Wires Inc.

    Inventor： Shreesha Adiga Manoor ,  Vinod Babu ,  Govind Chavan ,  Haroon Inam ,  Amrit Iyer ,  Arthur Kelley ,  Volodymyr Strelchuk

    IPC: H02M1/32 ,  G05F1/12 ,  H02J3/20 ,  H02M3/07

    Abstract: A multi-mode power supply is described for providing power to an impedance injection unit that is operable to inject reactive power into a power transmission line. The impedance injection unit is configured to operate safely in the presence of switching states of the impedance injection unit, and in the presence of disturbances such as surge currents in the power transmission line, by the multi-mode power supply clamping a potential overvoltage to a safe level. The power supply contains analog and digital circuits and can recover automatically from a surge current in the transmission line, or from a condition of zero line current. Power harvesting may be achieved via a line connected current transformer, via an internal current transformer, via a DC link capacitor, or from combinations of these.

    Detection and mitigation of DC injection on the power grid system
    3.
    发明授权
    Detection and mitigation of DC injection on the power grid system 有权

    公开(公告)号：US11462911B2

    公开(公告)日：2022-10-04

    申请号：US16814623

    申请日：2020-03-10

    Applicant: Smart Wires Inc.

    Inventor： Antonio Ginart ,  Shreesha Adiga Manoor ,  Mahsa Ghapandar Kashani ,  Hamed Khalilinia ,  Haroon Inam ,  Amrit Iyer ,  Govind Chavan ,  Niloofar Torabi

    IPC: H02J3/26 ,  H02J3/01 ,  H02J13/00 ,  H02J3/38 ,  H02M7/49 ,  H02M7/48

    Abstract: The presence of injected DC has harmful consequences for a power grid system. A piecewise sinusoidal ripple voltage wave at the line-frequency that rides on the main capacitor bank of the power converter is observed. This observation leads to a new detection method and mitigation method. A two-stage control circuit is added to the operation of a power converter that controls power line impedance in order to mitigate the injected DC and to block DC circulation. This control computes a correction angle to adjust the timing of generated pulsed square waves to counter-balance the ripple. A functional solution and the results of experiments are presented. Furthermore, an extraction method and three elimination methods for this ripple component are presented to allow dissipation of DC energy through heat and/or electronic magnetic wave, or to allow transformation of this energy into usable power that is fed back into the power grid.

    Power Supply System Responsive to High and Low Line Currents
    8.
    发明申请
    Power Supply System Responsive to High and Low Line Currents 有权

    公开(公告)号：US20210296930A1

    公开(公告)日：2021-09-23

    申请号：US17249281

    申请日：2021-02-25

    Applicant: Smart Wires Inc.

    Inventor： Govind Chavan ,  Amrit Iyer ,  Haroon Inam ,  Faisal Masood ,  Abdul Rahman ,  Vinod Babu

    IPC: H02J50/00 ,  H02J50/10 ,  H02J7/02 ,  H02H9/02

    Abstract: A power supply system is operable to harvest power at low and high line currents. A current transformer is arranged to couple to a power transmission line. A current sensor which may be a Rogowski coil is arranged to couple to the power transmission line. Branches of power supply circuitry are connected to a plurality of secondary windings of the current transformer. A control circuit selects one of the branches of power supply circuitry, depending on sensed magnitude of line current, to provide electrical power to an output capacitor. Sufficient stored energy is also provided for performing a backup of operating parameters when the line current reduces to zero.

    High speed solenoid driver circuit
    10.
    发明授权
    High speed solenoid driver circuit 有权

    公开(公告)号：US11621134B1

    公开(公告)日：2023-04-04

    申请号：US17249282

    申请日：2021-02-25

    Applicant: Smart Wires Inc.

    Inventor： Liyu Cao ,  Amrit Iyer ,  Arthur Kelley ,  Govind Chavan

    IPC: H01H33/42 ,  H01H33/666

    Abstract: A driver circuit for driving a solenoid, and related method, are described. A power supply charges one or more capacitors to a high voltage level sufficient to over-drive the solenoid. A switch is connected to the one or more capacitors and the solenoid. When the switch is on, the switch connects the one or more capacitors to the solenoid. When the switch is off, the switch disconnects the one or more capacitors from the solenoid. Control circuitry turns the switch on, and turns the switch off in response to sensing current through the solenoid reaches a defined maximum current.

Patent Agency Ranking