公开(公告)号：US20230327448A1

公开(公告)日：2023-10-12

申请号：US18131357

申请日：2023-04-05

Applicant: DARFON ELECTRONICS CORP.

Inventor： Wei-Lin Liu

IPC: H02J3/32 ,  H02J3/38 ,  H02J7/00

CPC classification number: H02J3/32 ,  H02J2300/24 ,  H02J7/0063 ,  H02J3/381

Abstract: A power conversion system (PCS) includes an alternating current (AC) power port, a first direct current (DC) power port, a second DC power port, a high voltage capacitor, a first DC converter, a second DC converter, a power inverter, and a microcontroller unit. The microcontroller unit adjusts a frequency of an AC power output by the power conversion system based on a voltage difference across the high voltage capacitor of the power conversion system to switch the frequency of the AC power between different frequencies.

公开(公告)号：US20230327473A1

公开(公告)日：2023-10-12

申请号：US18128202

申请日：2023-03-29

Applicant: DARFON ELECTRONICS CORP.

Inventor： Wei-Lin Liu

IPC: H02J7/00

CPC classification number: H02J7/007182 ,  H02J7/0048 ,  H02J2300/24

Abstract: A power conversion system (PCS) is provided. A micro-control unit of the PCS obtains a current charged ratio of a rechargeable battery according to a state-of-charge (SOC) signal received from the rechargeable battery, and obtains an output power of the PCS according to the voltage and current detected by a voltmeter-and-current meter of the PCS. When the micro-control unit detects that the mains off-grid occurs, the following steps are performed: judging whether a current charged ratio of the rechargeable battery is greater than the first ratio; when it is determined that the current charged ratio is greater than the first ratio, judging whether the output power is less than a first power; and when it is judged that the output power is less than the first power, increasing a frequency of an alternating current output from an alternating current (AC) power port of the PCS, so that a photovoltaic (PV) inverter coupled to the AC power port stops outputting power.

公开(公告)号：US12136819B2

公开(公告)日：2024-11-05

申请号：US18131357

申请日：2023-04-05

Applicant: DARFON ELECTRONICS CORP.

Inventor： Wei-Lin Liu

IPC: H02J3/32 ,  H02J3/38 ,  H02J7/00

Abstract: A power conversion system (PCS) includes an alternating current (AC) power port, a first direct current (DC) power port, a second DC power port, a high voltage capacitor, a first DC converter, a second DC converter, a power inverter, and a microcontroller unit. The microcontroller unit adjusts a frequency of an AC power output by the power conversion system based on a voltage difference across the high voltage capacitor of the power conversion system to switch the frequency of the AC power between different frequencies.

公开(公告)号：US20230327449A1

公开(公告)日：2023-10-12

申请号：US18131380

申请日：2023-04-06

Applicant: DARFON ELECTRONICS CORP.

Inventor： Wei-Lin Liu

IPC: H02J3/32 ,  H02M1/00 ,  H02J7/00 ,  H02J7/02

CPC classification number: H02J3/32 ,  H02M1/0009 ,  H02J7/0048 ,  H02J7/00712 ,  H02J7/02 ,  H02J2207/20 ,  H02J2300/24

Abstract: A microcontroller unit of a power conversion system (PCS) obtains a current charged ratio of a rechargeable battery according to a state-of-charge (SOC) signal received from the rechargeable battery, and obtains an output power of the PCS according to the voltage and current detected by a voltmeter-and-current meter of the PCS. When detecting mains off-grid, the microcontroller unit adjusts a frequency of an output alternating current of the power conversion system based on the output power and the current charged ratio of the charging battery, causing the frequency of the alternating current to switch between no less than three different frequencies. The greater current charged ratio of the charging battery, the lower the frequency the alternating current is switched to.