Patents by Inventor MINGLIAN ZHU
MINGLIAN ZHU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11264891Abstract: 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.Type: GrantFiled: January 21, 2019Date of Patent: March 1, 2022Assignees: NR ELECTRIC CO., LTDInventors: Yeyuan Xie, Haiying Li, Tiangui Jiang, Minglian Zhu, Dongming Cao, Zhongfeng Zhang
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Publication number: 20210036600Abstract: 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.Type: ApplicationFiled: January 21, 2019Publication date: February 4, 2021Inventors: Yeyuan XIE, Haiying LI, Tiangui JIANG, Minglian ZHU, Dongming CAO, Zhongfeng ZHANG
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Patent number: 10523131Abstract: A reconfigurable MMC sub-module unit and a control unit thereof are provided, the reconfigurable MMC sub-module unit is mainly formed by an MMC sub-module unit and a reconfigurable mechanism, wherein the reconfigurable mechanism is formed by switches, and the conversion of MMC sub-module unit topology is achieved through switching on and off the switches in the reconfigurable mechanism. According to the reconfigurable MMC sub-module unit and the control unit thereof, the rapid change of a topology structure for a converter can be achieved, which is suitable for the demand of the line connection of the medium-voltage power distribution network and variable topologies, and meets requirements of dynamic simulation experiment for different converter topologies in the dynamic simulation experiment, thereby reducing construction costs and duration, improving experiment efficiency, and having high flexibility and strong versatility.Type: GrantFiled: August 2, 2017Date of Patent: December 31, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Gang Li, Jianchun Li, Jie Tian, Haiying Li, Yu Lu, Yunlong Dong, Zhaoqing Hu, Minglian Zhu
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Publication number: 20190173392Abstract: A reconfigurable MMC sub-module unit and a control unit thereof are provided, the reconfigurable MMC sub-module unit is mainly formed by an MMC sub-module unit and a reconfigurable mechanism, wherein the reconfigurable mechanism is formed by switches, and the conversion of MMC sub-module unit topology is achieved through switching on and off the switches in the reconfigurable mechanism. According to the reconfigurable MMC sub-module unit and the control unit thereof, the rapid change of a topology structure for a converter can be achieved, which is suitable for the demand of the line connection of the medium-voltage power distribution network and variable topologies, and meets requirements of dynamic simulation experiment for different converter topologies in the dynamic simulation experiment, thereby reducing construction costs and duration, improving experiment efficiency, and having high flexibility and strong versatility.Type: ApplicationFiled: August 2, 2017Publication date: June 6, 2019Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Gang LI, Jianchun LI, Jie TIAN, Haiying LI, Yu LU, Yunlong DONG, Zhaoqing HU, Minglian ZHU
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Patent number: 10224833Abstract: Disclosed are a modulation method of a modular multilevel converter and a fault isolation method of a submodule unit. The modulation method comprises a first mode and a second mode, and the first mode and the second mode operate cyclically. In the first mode, a first power semiconductor switch and a second power semiconductor switch are turned on alternately, while a third power semiconductor switch is turned off normally and a fourth power semiconductor switch is turned on normally. In the second mode, the third power semiconductor switch and the fourth power semiconductor switch are turned on alternately, while the first power semiconductor switch is turned on normally and the second power semiconductor switch is turned off normally.Type: GrantFiled: July 13, 2016Date of Patent: March 5, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD.Inventors: Yeyuan Xie, Dongming Cao, Tiangui Jiang, Minglian Zhu, Guanxian Yin
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Patent number: 10148083Abstract: 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.Type: GrantFiled: July 13, 2016Date of Patent: December 4, 2018Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Yeyuan Xie, Minglian Zhu, Tiangui Jiang, Chuanjun Bo, Min Li
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Publication number: 20180226900Abstract: Disclosed are a modulation method of a modular multilevel converter and a fault isolation method of a submodule unit. The modulation method comprises a first mode and a second mode, and the first mode and the second mode operate cyclically. In the first mode, a first power semiconductor switch and a second power semiconductor switch are turned on alternately, while a third power semiconductor switch is turned off normally and a fourth power semiconductor switch is turned on normally. In the second mode, the third power semiconductor switch and the fourth power semiconductor switch are turned on alternately, while the first power semiconductor switch is turned on normally and the second power semiconductor switch is turned off normally.Type: ApplicationFiled: July 13, 2016Publication date: August 9, 2018Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Yeyuan XIE, Dongming CAO, Tiangui JIANG, Minglian ZHU, Guanxian YIN
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Publication number: 20180183231Abstract: 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.Type: ApplicationFiled: July 13, 2016Publication date: June 28, 2018Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: YEYUAN XIE, MINGLIAN ZHU, TIANGUI JIANG, CHUANJUN BO, MIN LI