公开(公告)号：US20220209659A1

公开(公告)日：2022-06-30

申请号：US17528273

申请日：2021-11-17

Applicant: Sungrow Power Supply Co.,Ltd.

Inventor： Guoqing Cai ,  Jiacai Zhuang ,  Xinyu Wang ,  Jun Xu

IPC: H02M3/155 ,  H02M1/08

Abstract: Provided is a bridge cascade system, which includes at least one phase unit and a driving unit for the phase unit. The phase unit includes N bridge topologies cascaded on alternating current AC sides. The driving unit includes one driving power supply circuit, multiple bootstrap power supply circuits and 2N driving circuits. In the phase unit, the driving circuits are powered by the driving power supply circuit directly or through corresponding bootstrap power supply circuits. The driving circuits are configured to provide driving signals for corresponding switch transistors in the phase unit. In this way, one driving power supply is matched with multiple bootstrap power supply circuits, realizing power supply to the driving circuits corresponding to the switch transistors of all bridge topologies, which reduces the difficulty in designing the driving power supply for the bridge cascade system and reduces cost for the system.

公开(公告)号：US10978964B2

公开(公告)日：2021-04-13

申请号：US16239160

申请日：2019-01-03

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Xinyu Wang ,  Tao Zhao ,  Jiacai Zhuang ,  Jun Xu ,  Yilei Gu

IPC: H02M7/49 ,  H02J3/38 ,  H02M3/335 ,  H02M1/00 ,  H02J3/18

Abstract: A medium and high voltage energy conversion system is provided. An input terminal of each of high-voltage isolated DC/DC converters in a phase circuit of the system is connected to a common DC bus. Each of the high-voltage isolated DC/DC converters converts, based on an open-loop control strategy or a closed-loop control strategy, a DC input voltage of a cascade module connected to the high-voltage isolated DC/DC converter into an instruction value related to a voltage of the common DC bus. A system controller of the system calculates, based on at least a voltage-current double loop control strategy, a three-phase modulation instruction to be sent to the cascade modules in three phases according to a parameter related to the voltage of the common DC bus, to implement grid-connected control on three phase circuits.

公开(公告)号：US20230369958A1

公开(公告)日：2023-11-16

申请号：US18029439

申请日：2021-09-06

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Jiacai Zhuang ,  Jun Xu ,  Yue Dong

IPC: H02M1/00 ,  H02M3/335

CPC classification number: H02M1/007 ,  H02M3/33576 ,  H02M1/008

Abstract: A cascaded multi-port converter and a three-phase medium-voltage input system. Input ends of all high-voltage conversion units are cascaded between two ports of an input end of the cascaded multi-port converter. A primary winding of a multi-winding transformer is connected to an output end of a corresponding high-voltage conversion unit, and a secondary winding of the multi-winding transformer is connected to an input end of a corresponding low-voltage rectifier unit. Output ends of some of the low-voltage rectifier units are connected to each other through a bus, and the remaining low-voltage rectifier units outputs independently, such that at least one secondary winding in each multi-winding transformer is indirectly connected to the bus, and at least one multi-winding transformer is provided with at least one secondary winding that independently outputs. Therefore, power balance between various modular units is achieved, and the security of the cascaded multi-port converter is improved.

公开(公告)号：US20230231466A1

公开(公告)日：2023-07-20

申请号：US18010435

申请日：2021-05-21

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Yue Dong ,  Jiacai Zhuang ,  Jun Xu

IPC: H02M1/00 ,  H02M3/335 ,  H02M1/08

CPC classification number: H02M1/007 ,  H02M3/33576 ,  H02M1/081 ,  H02M1/0074

Abstract: A cascaded power electronic transformer and a method for controlling the same are provided. The method includes: calculating electrical angles θi1 and θkps of an sth transformer and a compensation electrical angle θj of a jth transformer; adding the compensation electrical angle θj to the electrical angle θkps of the jth transformer, to obtain a compensated electrical angle θkps of the jth transformer; and calculating a square wave of a bridge arm voltage of each of the m primary converters and the r secondary converters of the sth transformer based on the electrical angle θi1 and the electrical angle θkps of the sth transformer after compensation.

公开(公告)号：US20220416672A1

公开(公告)日：2022-12-29

申请号：US17694767

申请日：2022-03-15

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Jiacai Zhuang ,  Jun Xu ,  Hanyu Wang

IPC: H02M3/335 ,  H02M1/00 ,  H02M3/00

Abstract: An isolated bidirectional converter and a method for controlling the same are provided. A primary winding or a secondary winding of a transformer module in the isolated bidirectional converter is connected in parallel with a first branch includes a first inductor and a first current sensor that arc connected in series, A current flowing through the first inductor is acquired by the first current sensor, and is proportional to a current flowing through a magnetizing inductor of the winding. Therefore, the current is controlled by modifying a duty cycle of a switch transistor on a bridge arm in the circuit, so that a. direct current component of a current flowing through the winding is modified indirectly, thereby avoiding magnetic bias on the magnetizing to inductor of the transformer module, and preventing the transformer module from being saturated.

公开(公告)号：US20220216918A1

公开(公告)日：2022-07-07

申请号：US17610126

申请日：2021-03-16

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Yuqing Cui ,  Jiacai Zhuang ,  Fushuai Zhuang ,  Yuan Zhuang ,  Jun Xu

IPC: H04B10/2575 ,  H04B10/40

Abstract: A method for controlling data transmission and reception and an application system thereof are provided. In the method, the peer-to-peer communication system is initialized to set each communication unit in the peer-to-peer communication system to be in a data receiving state. A communication host controls, according to a communication status of the peer-to-peer communication system, a controlled electrical connection path between the communication host and a communication interface to the communication transmission path, to work in a mode allowing data transmission from the communication slave to a communication host side of the controlled electrical connection path, or a mode allowing data transmission from the communication host side of the controlled electrical connection path to the communication slave.

公开(公告)号：US20220148797A1

公开(公告)日：2022-05-12

申请号：US17601920

申请日：2020-05-29

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Jiacai Zhuang ,  Jun Xu ,  Wei Liu ,  Jinguo Su

IPC: H01F27/32 ,  H01F41/12 ,  H01F27/28 ,  H01F27/24

Abstract: A transformer and a transformer machining process, including two coil units arranged side-by-side, each unit including an inner coil and an outer coil sleeved on the outside of the inner coil, an outer coil semi-conductive layer being wrapped on the outside of the outer coil and an inner coil semi-conductive layer being wrapped on the outside of the inner coil, and an insulating layer being integrally cast with the coil unit. In the transformer provided by the present application, the arrangement of the outer coil semi-conductive layer and the inner coil semi-conductive layer can effectively improve the problem of excessive local field strength caused by an irregular coil structure and solve the issue of wire package cracking caused by steel material generating heat in a pouring body; thus, the transformer has improved safety.

公开(公告)号：US11088655B2

公开(公告)日：2021-08-10

申请号：US16239256

申请日：2019-01-03

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Jiacai Zhuang ,  Yilei Gu ,  Jun Xu ,  Xinyu Wang

IPC: H02S40/32 ,  H02J3/38 ,  H02J3/01 ,  H02M7/797 ,  H02M7/48 ,  H02M3/335 ,  H02M7/49 ,  H02M1/00 ,  H02M3/24

Abstract: A photovoltaic solid-state transformer, a photovoltaic inverter system and a bidirectional high-voltage transformer are provided. The photovoltaic solid-state transformer includes: multiple single phase modules and a filter. Each of the single phase modules includes multiple multiple-output isolated DC/DC converters and multiple cascade DC/AC modules, where each of the multiple-output isolated DC/DC converters includes a DC/AC module, a high frequency transformer and multiple AC/DC modules. The multiple single phase modules are connected to the grid via the filter in a star connection or a delta connection. The DC/DC converters and the cascade DC/AC modules are simple logical switches and have conversion efficiency higher than 99%, such that the photovoltaic solid-state transformer has a reduced volume, and an improved overall efficiency higher than 98.5%.

公开(公告)号：US20250140468A1

公开(公告)日：2025-05-01

申请号：US18693498

申请日：2022-06-14

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Guoqing Cai ,  Jiacai Zhuang

IPC: H01F27/28

Abstract: An electronic element and a high-frequency winding thereof are provided. At least one power transmission line of the high-frequency winding is a multi-layer stranded wire, the multi-layer stranded wire includes at least two stacked layers of cables, and each layer of the cables includes multiple cables which are sequentially arranged; and any layer of the cables in the multi-layer stranded wire is at least stranded with an adjacent layer of cables, a cross section obtained by cutting the multi-layer stranded wire in any plane perpendicular to the lengthwise direction of the power transmission line includes cross sections of multiple layers of cables, which layers are stacked in a first direction, the cross section of each layer of the cables includes cross sections of multiple cables, which are sequentially arranged in a second direction, and the first direction is perpendicular to the second direction.

公开(公告)号：US12261643B2

公开(公告)日：2025-03-25

申请号：US17610126

申请日：2021-03-16

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Yuqing Cui ,  Jiacai Zhuang ,  Fushuai Zhuang ,  Yuan Zhuang ,  Jun Xu

IPC: H04B10/00 ,  H04B10/2575 ,  H04B10/40

Abstract: A method for controlling data transmission and reception and an application system thereof are provided. In the method, the peer-to-peer communication system is initialized to set each communication unit in the peer-to-peer communication system to be in a data receiving state. A communication host controls, according to a communication status of the peer-to-peer communication system, a controlled electrical connection path between the communication host and a communication interface to the communication transmission path, to work in a mode allowing data transmission from the communication slave to a communication host side of the controlled electrical connection path, or a mode allowing data transmission from the communication host side of the controlled electrical connection path to the communication slave.