-
公开(公告)号：US11515806B2
公开(公告)日：2022-11-29
申请号：US17314663
申请日：2021-05-07
发明人： Teng Liu , Jianping Ying , Lifeng Qiao , Xin Wang , Hongwei Xiao
摘要： A conversion device includes: an inductor connected to the AC power grid; a first-stage converter configured to output a bus voltage based on the AC power grid; a second-stage converter configured to convert the bus voltage into an output voltage to the load; and a filtering network, wherein a first resistance-capacitance circuit is disposed between the first and third terminals of the filtering network, a second resistance-capacitance circuit is disposed between the second and third terminals of the filtering network, the first terminal of the filtering network is connected to the AC power grid, the second terminal of the filtering network is connected to the bus or the second terminal of the second-stage converter, and the third terminal of the filtering network is grounded through a first capacitor.
-
公开(公告)号：US11921148B2
公开(公告)日：2024-03-05
申请号：US17816728
申请日：2022-08-02
发明人： Lifeng Qiao , Dehui Zhang , Teng Liu
CPC分类号： G01R31/1272 , G01R19/0092 , G01R31/20 , G01R31/62
摘要： The disclosure discloses a method and device for monitoring partial discharge. The monitoring method including: step a, connecting a monitoring circuit in parallel to both ends of a tested product, disposing a ground wire between the monitoring circuit and ground, disposing a first sensor in the monitoring circuit, and disposing a ground wire sensor on the ground wire; step b, applying an excitation signal to the tested product, acquiring a first signal through the first sensor and acquiring a ground wire signal through the ground wire sensor within a monitoring cycle; and step c, determining whether the tested product has partial discharge through the first signal and the ground wire signal. The disclosure can avoid the partial discharge monitoring device from wrongly determining an interference signal to be a partial discharge signal, enhance anti-interference capability of the partial discharge monitoring device, and improve monitoring accuracy.
-
3.发明授权公开(公告)号：US11824526B2
公开(公告)日：2023-11-21
申请号：US17654242
申请日：2022-03-10
发明人： Lifeng Qiao , Jie Zhao , Dehui Zhang , Erlei Li , Teng Liu , Jianping Ying
IPC分类号： H03K17/567
CPC分类号： H03K17/567
摘要： A circuit for preventing false turn-on of a semiconductor switching device includes an active clamp circuit, a control circuit, a power amplifier circuit, and a suppression circuit. The control circuit is coupled to an input of the power amplifier circuit. An output of the power amplifier circuit is coupled to a gate of the semiconductor switching device. The active clamp circuit is configured to operate within a preset period when a voltage between the first end of the semiconductor switching device and a second end of the semiconductor switching device is greater than a preset voltage. The suppression circuit includes a controllable switch, which is configured to turn on after the operation of the active clamp circuit is completed, such that potential at the input of the power amplifier circuit is clamped to a fixed potential.
-
公开(公告)号：US11515777B2
公开(公告)日：2022-11-29
申请号：US17465434
申请日：2021-09-02
发明人： Xin Wang , Dehai Lou , Lifeng Qiao , Teng Liu , Weibo Qin
摘要： A cascaded conversion system and a voltage equalizing control method thereof are provided. The cascaded conversion system includes a plurality of conversion circuits connected in cascade. Each conversion circuit includes a DC-side capacitor, a switching unit and a control unit. The DC-side capacitors of the conversion circuits are electrically connected in series. In each conversion circuit, the switching unit is connected to the DC-side capacitor in parallel and includes a plurality of bridge arms. Each bridge arm includes a first switch and a second switch. The control unit controls the switches according to the voltage across the DC-side capacitor. The control unit controls the first and second switches to be turned on alternately. All the first switches are turned on and off simultaneously, and all the second switches are turned on and off simultaneously, thereby making the voltages across the DC-side capacitors of the conversion circuits equal.
-
公开(公告)号：US11223285B2
公开(公告)日：2022-01-11
申请号：US16817586
申请日：2020-03-12
发明人： Yi Zhang , Er-Dong Chen , Hong-Wei Xiao , Zhao Wang , Pian Zhou , Jian-Ping Ying , Teng Liu
IPC分类号： H02M3/335
摘要： A method for controlling a DC-DC conversion system having power conversion modules, input sensors, an output sensor and a controller, in which each of the power conversion modules has one or more conversion units. The output sensor detects an output signal of the DC-DC conversion system. The input sensors detect input voltage signals located at series-connected first sides of one or more conversion units respectively. The controller receives the output signal and the input voltage signals. The controller generates a first control signal according to the output signal and an output reference signal. The controller generates second control signals according to the input voltage signals and input reference voltage signals. The controller outputs a modulation signal corresponding to a corresponding one of the second control signals according to the first control signal and the corresponding second control signal, to control switches of a corresponding conversion unit.
-
公开(公告)号：US11217993B2
公开(公告)日：2022-01-04
申请号：US16830327
申请日：2020-03-26
发明人： Teng Liu , Jianping Ying , Yi Zhang , Guangcheng Hu , Xin Wang , Dehai Lou , Yun Cao
摘要： The present disclosure provides a conversion system with a high voltage side and a low voltage side, including: a plurality of power units, each power unit including: a plurality of DC/DC converters, when in normal operation, one part of DC/DC converters being in a working state and other DC/DC converters being in a cold backup state; a plurality of bypass circuits connected in parallel to the corresponding DC/DC converters; a detection unit connected to each DC/DC converter, and detects the DC/DC converter; and a control unit coupled to the detection unit and each of the plurality of DC/DC converters; and a main control unit coupled with each control unit and configured to receive the preset signal of respective control unit and outputs a bypass signal and a release signal to the corresponding control unit according to the preset signal.
-
公开(公告)号：US20150310976A1
公开(公告)日：2015-10-29
申请号：US14693271
申请日：2015-04-22
发明人： Ai-Xing Tong , Teng Liu
CPC分类号： H01F27/263 , H01F27/18 , H01F27/346
摘要： A magnetic element is disclosed, and includes a magnetic core, at least one winding set and at least one heat conduction pipe. The magnetic core includes two magnetic columns arranged oppositely, and two magnetic plates arranged oppositely. The magnetic plates respectively cover two opposite end surfaces of each magnetic column to mutually form a closed magnetic flux path with the magnetic columns. Each of the magnetic columns includes a plurality of first magnetic blocks stacked together. Each of the magnetic plates includes at least one second magnetic block. The winding set binds one of the magnetic columns. The heat conduction pipe is disposed internally in one of the magnetic columns.
摘要翻译： 公开了一种磁性元件，并且包括磁芯，至少一个绕组和至少一个导热管。 磁芯包括相对布置的两个磁性柱，和相对布置的两个磁性板。 磁性板分别覆盖每个磁性柱的两个相对的端面，以与磁性柱相互形成封闭的磁通路径。 每个磁柱包括堆叠在一起的多个第一磁性块。 每个磁性板包括至少一个第二磁性块。 绕组集合一个磁柱。 导热管内部设置在磁性柱之一中。
-
公开(公告)号：US12119741B2
公开(公告)日：2024-10-15
申请号：US17232110
申请日：2021-04-15
发明人： Peng Xiao , Ming Wang , Yi Zhang , Teng Liu , Jianping Ying
CPC分类号： H02M1/32 , G01R31/3004 , H02M7/483
摘要： A modular multilevel converter system, and a voltage detection method and an open-circuit fault diagnosis method thereof are disclosed. The modular multilevel converter system includes: N sub-modules sequentially cascaded, where N is an integer greater than or equal to 2, each of the sub-modules comprising at least one bridge arm and a capacitor connected in parallel to the bridge arm, the capacitor having a positive terminal and a negative terminal; and a voltage detection unit for detecting a voltage between at least two adjacent sub-modules in the N sub-modules, the voltage detection unit being connected between the positive terminal of the capacitor of the first sub-module and the negative terminal of the capacitor of the last sub-module in the at least two sub-modules.
-
公开(公告)号：US12003192B2
公开(公告)日：2024-06-04
申请号：US17684382
申请日：2022-03-01
发明人： Lifeng Qiao , Yong Zeng , Teng Liu , Weibo Qin
摘要： The invention provides a converter and a method for suppressing loop interference of converter. The converter includes first and second switching sets connected to each other. Each switching set includes a plurality of switching devices. The plurality of second switching devices are configured to be turned on for a first time after the turn-off time of the plurality of first switching devices, such that each of the plurality of second switching devices provides a path for current within the first time to reduce a potential difference between the first end of at least one of the plurality of second switching devices and the first end of the remaining of the plurality of second switching devices.
-
公开(公告)号：US11807116B2
公开(公告)日：2023-11-07
申请号：US17325213
申请日：2021-05-20
发明人： Liping Sun , Hongyang Wu , Jianjun Ni , Teng Liu
CPC分类号： B60L53/12 , H02J50/402 , B60L2210/30 , H02J2310/48
摘要： A charging system includes a multi-pulse transformer, n AC-DC conversion units, n power supply terminals and a charging scheduling apparatus. A plurality of secondary windings of the multi-pulse transformer form n winding pairs. The n AC-DC conversion units are coupled to the n winding pairs in a one-to-one correspondence. The n power supply terminals are coupled to the n AC-DC conversion units in a one-to-one correspondence. The charging scheduling apparatus are configured to detect the number of charging devices and states of the power supply terminals, and determine M target winding pairs from the n winding pairs for supplying power to the charging devices. The M target winding pairs include a winding pair distributed close to a first end of the magnetic core and a winding pair distributed close to a second end of the magnetic core.
-
-
-
-
-
-
-
-
-
搜索结果
34 条记录 (耗时 0.019 秒)
