公开(公告)号：US20250030349A1

公开(公告)日：2025-01-23

申请号：US18710200

申请日：2022-01-17

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Yongchun YANG ,  Shuozu HE ,  Yuhao LUO

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

Abstract: A switching tube control method and device, and a direct-current converter. In the solution, after a switching tube on a leading bridge arm in a phase-shifted full-bridge converter is disconnected and a current on a transformer is not greater than a current preset value, a corresponding switching tube on a lagging bridge arm is controlled to be disconnected, and it is ensured that the current flowing through the switching tube is small when the switching tube on the lagging bridge arm is disconnected, such that the soft turn-off of the switching tube on the lagging bridge arm is realized, the loss is reduced, the anti-interference capability of the switching tube is improved, and the EMS performance of the switching tube is improved.

公开(公告)号：US20240275172A1

公开(公告)日：2024-08-15

申请号：US18568820

申请日：2021-07-08

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Yuhao LUO ,  Dongming ZHOU ,  Fei SHEN ,  Xuan ZHU ,  Xiao LU ,  Guowei MIAO ,  Wenwei LI

IPC: H02J3/38 ,  H02J3/00

CPC classification number: H02J3/38 ,  H02J3/001 ,  H02J3/007 ,  H02J2300/24

Abstract: A method and an apparatus for controlling a shutoff device, and a shutoff device. The method is applied to a processor of the shutoff device. The method includes: determining whether a heartbeat signal is received continuously during a first preset period; if so, controlling the N main switching transistors to be turned on, and determining whether the heartbeat signal is not received continuously during a second preset period; and if so, controlling the N main switching transistors to be turned off, and controlling the release circuit to be turned on to release a voltage on the bus. A release circuit is controlled to release voltage on the bus to the ground, thereby rapidly reducing the voltage on the bus, avoiding person danger and safety accidents caused by the long-term presence of the direct current high voltage on the bus, and improving the safety and reliability of a photovoltaic system.

公开(公告)号：US20240088833A1

公开(公告)日：2024-03-14

申请号：US18273442

申请日：2022-01-17

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Yuhao LUO ,  Dongming ZHOU ,  Xuan ZHU

IPC: H02S50/10 ,  H02S40/36

CPC classification number: H02S50/10 ,  H02S40/36

Abstract: Provided is a detection apparatus for a photovoltaic component, including a detection device and a control device. An input terminal of the detection device is connected to an output terminal of the breaking device. The detection device is configured to detect, based on at least one of a voltage and a current outputted from the photovoltaic component, whether the photovoltaic component and a connection circuit for the photovoltaic component operate normally. The control device is connected with the breaking device and the detection device. The control device is configured to control to switch on the breaking device, to transmit the at least one of a voltage and a current outputted from the photovoltaic component to the detection device.

公开(公告)号：US20250130280A1

公开(公告)日：2025-04-24

申请号：US18686891

申请日：2022-01-29

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Yuhao LUO ,  Dongming ZHOU ,  Xuan ZHU ,  Wenwei LI ,  Houkun TAN ,  Zhenhuan ZHANG ,  Guowei MIAO

IPC: G01R31/327 ,  H02J3/38 ,  H02M1/36 ,  H02S50/00

Abstract: A method for testing and controlling a rapid shutdown device, and a tester are provided. The method includes: transmitting a heartbeat signal of first signal strength to a target rapid shutdown device in a target rapid shutdown module to switch the target rapid shutdown device on and testing the target rapid shutdown device using a preset testing program t, on receipt of a rapid shutdown device testing request, where all rapid shutdown devices in the target rapid shutdown module are previously off; and transmitting a heartbeat signal of second signal strength to the target rapid shutdown module to switch the rapid shutdown devices on or off, on receipt of a rapid shutdown device control request, where the first signal strength is lower than the second signal strength. The rapid shutdown devices can be tested and controlled efficiently, thereby effectively avoiding safety hazards and thus protecting workers.

公开(公告)号：US20230344362A1

公开(公告)日：2023-10-26

申请号：US18016353

申请日：2020-09-23

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Jian WU ,  Biaojie QI ,  Yongchun YANG ,  Yuhao LUO

IPC: H02M7/48 ,  H02M1/08 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M7/4815 ,  H02M1/083 ,  H02M7/53873 ,  H02M1/0058

Abstract: A three-phase inverter and a control method therefor are provided. Resonant capacitors are provided between the midpoints of three bridge arms and the positive and negative poles of a DC bus to constitute resonant units with output inductors, so as to establish a resonant network for the implementation of soft switching, without adding a switching transistor. Compared with the soft-switching of the three-phase inverter in the conventional technology, circuit devices are saved, the control process is simplified, and system hardware and software overheads are reduced. By controlling the three-phase inverter to operate in a continuous mode, the switching loss of the switching transistor and the conduction loss of a flyback diode in the switching transistor are reduced, the conversion efficiency is improved, the electromagnetic noise caused by the switching transistor is reduced, and high-quality grid currents are output.

公开(公告)号：US11770065B2

公开(公告)日：2023-09-26

申请号：US17432935

申请日：2019-12-18

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Biaojie Qi ,  Jian Wu ,  Yongchun Yang ,  Yuhao Luo

IPC: H02M7/5387 ,  H02M1/12

CPC classification number: H02M1/126 ,  H02M7/5387

Abstract: A three-phase grid-connected inverter, a control system thereof and a control method therefor. The inverter is a three-phase three-leg grid-connected inverter, and a filter capacitor is connected to a negative electrode of a DC input bus to form a filter loop, so as to filter harmonic wave in the circuit, realizing high-quality grid-connected current at small power, without increasing an inductance value, so that the parallel inverter device in the system operates stably and thus is applicable to photovoltaic microinverters. Moreover, the three-phase three-leg grid-connected inverter operates in a discontinuous conduction mode, that is, in a switching cycle, the inductive current is reduced to 0, so that the switching loss of the three-phase three-leg grid-connected inverter is reduced.

公开(公告)号：US20240275306A1

公开(公告)日：2024-08-15

申请号：US18563421

申请日：2022-04-02

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Dongming ZHOU ,  Yongchun YANG ,  Biaojie QI ,  Yuhao LUO ,  Kaifeng JIN

IPC: H02M7/5387 ,  H02M1/12 ,  H02M1/32

CPC classification number: H02M7/53871 ,  H02M1/126 ,  H02M1/32

Abstract: A micro-inverter and a grid-tied output control method and device therefor. The micro-inverter comprises an inverter full-bridge circuit and an LC filter circuit. The LC filter circuit is grid-tied to a power grid by means of an output switch. The method comprises: obtaining a voltage amplitude, a frequency, and a phase of a voltage of the power grid by using phase locking; adjusting a power switching transistor driving the inverter full-bridge circuit to cause an output voltage of the micro-inverter to track the voltage of the power grid; and controlling the output switch to be switched on so that the micro-inverter operates normally. In the present application, before the output switch is turned off to grid-tie the micro-inverter, the power grid voltage is phase-locked and the output voltage of the micro-inverter is controlled to track the power grid voltage.

公开(公告)号：US20240146204A1

公开(公告)日：2024-05-02

申请号：US18279065

申请日：2021-08-02

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Yunjie MO ,  Yongchun YANG ,  Biaojie QI ,  Yuhao LUO

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

CPC classification number: H02M3/33592 ,  H02M1/0043 ,  H02M1/0058 ,  H02M1/083 ,  H02M3/01

Abstract: A phase-shifted full-bridge converter, and a method and a device for controlling the phase-shifted full-bridge converter are provided. The method includes: acquiring a current currently inputted to the phase-shifted full-bridge converter; determining, based on a correspondence between inputted currents and operation modes, an operation mode corresponding to the current currently inputted to the phase-shifted full-bridge converter; and acquiring, from maximum power point tracking in the determined operation mode, a phase angle for the phase-shifted full-bridge converter and a switching frequency of a switch transistor in the phase-shifted full-bridge converter, to control the switch transistor to operate based on the phase angle and the switching frequency.

公开(公告)号：US20220255459A1

公开(公告)日：2022-08-11

申请号：US17610452

申请日：2020-02-17

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Jian WU ,  Biaojie QI ,  Yongchun YANG ,  Yuhao LUO

IPC: H02M7/5387 ,  H02M1/12 ,  H02S40/32

Abstract: A three-phase grid-connected inverter, and a method and a device for controlling the three-phase grid-connected inverter are provided. The method is applied to a three-phase three-leg grid-connected inverter. A structure of the three-phase three-leg grid-connected inverter is improved, so that a filter capacitor (C1, C2, and C3) is connected to a negative electrode of a direct current input bus to form a harmonic bypass circuit. Inverter devices connected in parallel in the system operate stably without increase of inductance of an inductor (L1, L2, L3). In addition, the three-phase three-leg grid-connected inverter according to the present disclosure operates in a discontinuous mode of inductor current (iL1, iL2, and iL3). That is, in the process that a power switch transistor (Q1, Q2, Q3, Q4, Q5 and Q6) on bridge legs is turned on, the inductor current (iL1, iL2, and iL3) drops to zero.

公开(公告)号：US20220255420A1

公开(公告)日：2022-08-11

申请号：US17432935

申请日：2019-12-18

Applicant: ALTENERGY POWER SYSTEM INC.

Inventor： Biaojie QI ,  Jian WU ,  Yongchun YANG ,  Yuhao LUO

IPC: H02M1/12 ,  H02M7/5387

Abstract: A three-phase grid-connected inverter, a control system thereof and a control method therefor. The inverter is a three-phase three-leg grid-connected inverter, and a filter capacitor is connected to a negative electrode of a DC input bus to form a filter loop, so as to filter harmonic wave in the circuit, realizing high-quality grid-connected current at small power, without increasing an inductance value, so that the parallel inverter device in the system operates stably and thus is applicable to photovoltaic microinverters. Moreover, the three-phase three-leg grid-connected inverter operates in a discontinuous conduction mode, that is, in a switching cycle, the inductive current is reduced to 0, so that the switching loss of the three-phase three-leg grid-connected inverter is reduced.