公开(公告)号：US20220321027A1

公开(公告)日：2022-10-06

申请号：US17613016

申请日：2020-02-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenji HANAMURA ,  Wataru HORIO ,  Hiroyuki FUJII ,  Shogo HIROTA

IPC: H02M7/483 ,  H02M1/00 ,  H02M1/32 ,  H02M7/5395

Abstract: An inverter circuit includes a plurality of flying capacitors and converts a DC voltage supplied from a DC power supply into an AC voltage. A filter circuit approximates a waveform of an output voltage of the inverter circuit to a sinusoidal wave. An excess current protection circuit supplies a block signal for turning off a plurality of switching elements to the driving circuit when an excess current is detected. When at least one of an abnormal voltage in any of the plurality of flying capacitors and an abrupt change in an output voltage of the power converter occurs, voltages other than a positive voltage of the DC power supply, a negative voltage of the DC power supply, and a zero voltage are restricted from being output from the inverter circuit.

公开(公告)号：US20200019199A1

公开(公告)日：2020-01-16

申请号：US16582156

申请日：2019-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kota MAEBA ,  Akihiro KIKUCHI ,  Wataru HORIO ,  Hiroyuki FUJII ,  Kenji HANAMURA ,  Tomoki ITO

IPC: G05F1/46 ,  H02M3/156 ,  H02M7/48 ,  H02J1/10

Abstract: In a power converter including: a first DC-DC converter, an inverter, and a control circuit, a second DC-DC converter that controls an input and an output of a power storage unit is connectable to a DC bus. The control circuit deactivates a reverse power flow suppression function for suppressing a reverse power flow from the inverter to a power system when the second DC-DC converter is not connected to the DC bus and activates the reverse power flow suppression function when the second DC-DC converter is connected to the DC bus.

公开(公告)号：US20210288504A1

公开(公告)日：2021-09-16

申请号：US17258092

申请日：2019-06-19

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Wataru HORIO ,  Hiroyuki FUJII ,  Kenji HANAMURA ,  Kota MAEBA

IPC: H02J3/46 ,  H02J3/38 ,  H02J1/10 ,  H02J1/12

Abstract: The converter circuit includes an inverter. The converter circuit receives DC power from a DC power supply (such as a solar cell or a storage battery unit), has the DC power converted into AC power by at least the inverter, and outputs the AC power to a load or a power grid. When acquiring information that two or more types of power curtailment causes have arisen, a control circuit makes the converter circuit limit power output to a maximum degree of power curtailment out of two or more degrees of power curtailment according to specifics of the two or more types of power curtailment causes.