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公开(公告)号：US11411488B2
公开(公告)日：2022-08-09
申请号：US16932273
申请日：2020-07-17
发明人： Peng Chen , Jinhu Cao , Wei Bie , Leiming Lin
摘要： A method and apparatus for controlling a neutral point clamped inverter circuit, and a neutral point clamped inverter. It is detected that whether the inverter circuit operates in an abnormal state. In a case that the inverter circuit operates in the abnormal state, a control mode of the inverter circuit is changed to a specified control mode in which a transistor that may be damaged is in an off state. In this way, there is not current flowing through the transistor, avoiding damage of the transistor and thereby improving safety of the inverter circuit.
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公开(公告)号：US20220159880A1
公开(公告)日：2022-05-19
申请号：US17396498
申请日：2021-08-06
IPC分类号： H05K7/20
摘要： An inverter and a heat radiation structure thereof are provided. The heat radiation structure of the inverter includes a heat radiator for radiating heat from a heating element of the inverter, and a heat radiation fan for air-cooling the heat radiator. The heat radiator includes multiple heat radiation fins able to be air-cooled. The number of the heat radiator is at least two, and two adjacent heat radiators are a first heat radiator and a second heat radiator respectively. The heat radiation fan is provided between the first heat radiator and the second heat radiator, and the heat radiation fan is located on the tops of the heat radiation fins. In the heat radiation structure of the inverter, the heat radiation fan is capable of cooling the first heat radiator and the second heat radiator at the same time.
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公开(公告)号：US10205444B2
公开(公告)日：2019-02-12
申请号：US15664583
申请日：2017-07-31
发明人： Peng Chen , Jinhu Cao , Houlai Geng , Peng Wen
IPC分类号： H03K3/017 , H03K5/04 , H03K7/08 , H02M1/08 , H02M1/38 , H02M7/483 , H02M7/487 , H02M7/5395 , H03K19/20
摘要： A pulse width modulation (PWM) control method for a five-level inverting circuit is provided. The five-level inverting circuit includes a first capacitor, a second capacitor, a third capacitor and first to eighth switch branches. In this PWM control method, the control logic is set to enable the first and fourth switch branches to be turned on in a complementary manner, the second and fifth switch branches to be turned on in a complementary manner, the third and sixth switch branches to be turned on in a complementary manner, and the seventh and eighth switch branches to be turned on in a complementary manner, and enable the first and second switch branches to be turned on in an interlocking manner, and the sixth and fifth switch branches to be turned on in an interlocking manner.
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公开(公告)号：US09906166B2
公开(公告)日：2018-02-27
申请号：US15581723
申请日：2017-04-28
摘要： Provided are a method and a device for controlling an operation of an inverter. The method includes: determining whether a direct current side voltage of the inverter is greater than an operation voltage setting threshold; and if no, controlling the inverter to operate according to a five level control strategy; and if yes: adjusting the direct current side voltage by using a maximum power tracking algorithm; adjusting linearly a floating capacitor voltage of the inverter based on the adjusted direct current side voltage; determining whether the adjusted floating capacitor voltage is in a preset range; and if yes, controlling the inverter to operate according to a five level control strategy; and if no, controlling the inverter to operate according to a seven level control strategy.
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公开(公告)号：US11930626B2
公开(公告)日：2024-03-12
申请号：US17396498
申请日：2021-08-06
IPC分类号： H05K7/20
CPC分类号： H05K7/20918 , H05K7/2039
摘要： An inverter and a heat radiation structure thereof are provided. The heat radiation structure of the inverter includes a heat radiator for radiating heat from a heating element of the inverter, and a heat radiation fan for air-cooling the heat radiator. The heat radiator includes multiple heat radiation fins able to be air-cooled. The number of the heat radiator is at least two, and two adjacent heat radiators are a first heat radiator and a second heat radiator respectively. The heat radiation fan is provided between the first heat radiator and the second heat radiator, and the heat radiation fan is located on the tops of the heat radiation fins. In the heat radiation structure of the inverter, the heat radiation fan is capable of cooling the first heat radiator and the second heat radiator at the same time.
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公开(公告)号：US20240356249A1
公开(公告)日：2024-10-24
申请号：US18683507
申请日：2022-05-25
发明人： Zhanliang Shen , Yanfei Yu , Peng Chen , Xiaoxun Li
CPC分类号： H01R9/2608 , H05K5/0217 , H05K5/0247
摘要： A PV terminal assembly includes a mounting frame and at least one PV terminal. The mounting frame is provided with mounting positions used for fixing PV terminals, and there are at least two mounting positions, so that at least two PV terminals can be integrated on the mounting frame. The number of PV terminals on the whole PV terminal assembly can be adjusted by adjusting the number of PV terminals on the mounting frame. An electrical device includes the PV terminal assembly.
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公开(公告)号：US20240339921A1
公开(公告)日：2024-10-10
申请号：US18579630
申请日：2022-04-24
发明人： Shuai Sun , Anran He , Peng Chen , Zhicheng Wang , Xuebing Chen
CPC分类号： H02M1/0074 , H02M1/0077 , H02S40/32
摘要： A photovoltaic system and a control method. The photovoltaic system includes a master DC/DC converter; a slave DC/DC converter; a master DC/AC converter; and a slave DC/AC converter. The master DC/AC converter is configured to send a current instruction value and an input voltage of the master DC/AC converter to the slave DC/AC converter; and the slave DC/AC converter is configured to control an output current, based on an input voltage of the slave DC/AC converter, the current instruction value, and the input voltage of the master DC/AC converter, so that a current through the N wire is less than a preset current.
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公开(公告)号：US10320294B2
公开(公告)日：2019-06-11
申请号：US15474045
申请日：2017-03-30
发明人： Tao Jiang , Peng Chen , Xiaofei Wang , Fei Li
摘要： A discharging method of a bus capacitor, a controller, a DC-DC converter and an inverter are provided. After a DC-DC converter or an inverter is powered off, in a case that a detected voltage across a bus capacitor of the DC-DC converter or the inverter is determined to meet a preset condition, a switch of the DC-DC converter or the inverter is controlled to be turned on or turned off to cause the bus capacitor, the switch, and a reactor of the DC-DC converter or the inverter to form a current loop, until the voltage does not meet the preset condition. Based on the method, discharging function is achieved for the bus capacitor after the DC-DC converter or the inverter is powered off, without the need for an additional discharging circuit, which solves problems caused by the additional discharging circuit required in the conventional technology.
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公开(公告)号：US11362621B2
公开(公告)日：2022-06-14
申请号：US17211543
申请日：2021-03-24
发明人： Wenhao Li , Yonghong Li , Qingqing Xu , Peng Chen , Puyun Dong
IPC分类号： H02S40/36 , H01R13/424 , H01R13/621 , H01R4/62 , H01R13/502 , H01R13/02 , H02S40/30 , H02S40/34 , H01R13/03
摘要： A wiring device of photovoltaic power generation equipment includes an aluminum wire and a copper-aluminum transition element. One end of the aluminum end is connected with the aluminum end of the copper-aluminum transition piece, and the other end of the aluminum end is configured to connect with an external connecting component. The copper end is configured to connect with photovoltaic power generation equipment. In the wiring device of the photovoltaic power generation equipment provided in the present application, the copper-aluminum transition piece is arranged at the position of the photovoltaic power generation equipment, and the aluminum end of the copper-aluminum transition piece is connected to the external connecting component by the aluminum wire, avoiding using copper wire for long-distance conduction. The cost of the aluminum wire is much lower than that of the copper wire. Therefore, the cost of the wiring device provided by the application is reduced.
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