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    Redundant energy acquisition circuit of power module, and control method thereof
    3.
    发明授权
    Redundant energy acquisition circuit of power module, and control method thereof 有权

    公开(公告)号：US11264891B2

    公开(公告)日：2022-03-01

    申请号：US16966459

    申请日：2019-01-21

    Applicant: NR Electric Co., Ltd ,  NR Engineering Co., Ltd

    Inventor： Yeyuan Xie ,  Haiying Li ,  Tiangui Jiang ,  Minglian Zhu ,  Dongming Cao ,  Zhongfeng Zhang

    IPC: H02M1/32 ,  H02M7/483

    Abstract: A redundant energy acquisition circuit of a power module includes at least one power semiconductor device, a first capacitor, and a first bypass switch. The redundant energy acquisition circuit of the power module includes: a power supply board acquiring energy from the first capacitor, supplying power to a control board, and charging a discharge circuit. A first charging circuit has one end connected to a positive electrode of the first capacitor and another end connected to the discharge circuit, and charges the discharge circuit when the power supply board is not operating normally. The control board controls the discharge circuit to close. The discharge circuit discharges and triggers the first bypass switch to close after the discharge circuit is closed.

    Fault current-suppressing damper topology circuit and control method thereof and converter
    4.
    发明授权
    Fault current-suppressing damper topology circuit and control method thereof and converter 有权

    公开(公告)号：US10148083B2

    公开(公告)日：2018-12-04

    申请号：US15570750

    申请日：2016-07-13

    Applicant: NR ELECTRIC CO., LTD ,  NR ENGINEERING CO., LTD

    Inventor： Yeyuan Xie ,  Minglian Zhu ,  Tiangui Jiang ,  Chuanjun Bo ,  Min Li

    IPC: H02H7/12 ,  H03K17/0814 ,  H02M7/5387 ,  H02M1/32 ,  H03K17/081 ,  H02M7/483

    Abstract: Disclosed are a fault current-suppressing damper topology circuit and a control method thereof and a converter. An anode of a separate diode is connected to a positive electrode of a second switch module, a cathode of the separate diode is connected to one end of an energy storage capacitor, and the other end of the energy storage capacitor is connected to a negative electrode of a first switch module; a damping resistor is connected in parallel with an arrester and then with the first switch module; a bypass switch is connected in parallel between a terminal x1 and a terminal x2 of the damper topology circuit; a power supply system acquires energy from the energy storage capacitor and supplies power to a control system; and the control system controls an operating state of the damper topology circuit by controlling the bypass switch, the first switch module and the second switch module. The fault current-suppressing damper topology circuit is applied to voltage source converters. In case of a DC fault, stress resulting from fault currents is reduced by use of a damping resistor, thereby avoiding damages to a device and achieving self-power supply, modularization and independent control. The fault current-suppressing damper topology circuit can be flexibly applied to various types of voltage source converters and has outstanding economic efficiency and technicality.

    Charging method for sub-module based hybrid converter
    6.
    发明授权
    Charging method for sub-module based hybrid converter 有权

    公开(公告)号：US10483788B2

    公开(公告)日：2019-11-19

    申请号：US16466835

    申请日：2018-01-12

    Applicant: NR ELECTRIC CO., LTD ,  NR ENGINEERING CO., LTD

    Inventor： Jiudong Ding ,  Yu Lu ,  Yunlong Dong ,  Haiying Li ,  Jie Tian ,  Defeng Qiu ,  Tiangui Jiang ,  Jianyang Lian

    IPC: H02M7/219 ,  H02J7/04 ,  H02J7/00 ,  H02J3/36

    Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.

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