公开(公告)号：US20240313765A1

公开(公告)日：2024-09-19

申请号：US18571215

申请日：2022-06-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： HIROKI AKASHI ,  YOHSUKE MITANI ,  YUTA NAGATOMI ,  MASAFUMI NAKAMURA ,  MASATOSHI NAKASE ,  KINYA KATO ,  YASUHIRO IIJIMA

IPC: H03K17/30 ,  H03K17/06 ,  H03K17/081

CPC classification number: H03K17/302 ,  H03K17/063 ,  H03K17/08104 ,  H03K2217/0081

Abstract: In a backup power supply system according to the present invention, in a non-defective state in which a main power supply is not defective, a controller turns on a first field-effect transistor and causes a third field-effect transistor to operate in an active region so as to charge the power storage device from the main power supply via a charging path through the first field-effect transistor, the second field-effect transistor, and the third field-effect transistor. In a defective state in which the main power supply is defective, the controller turns off the first field-effect transistor and turns on the second field-effect transistor and the third field-effect transistor so as to supply power from the power storage device to the load.

公开(公告)号：US20240275202A1

公开(公告)日：2024-08-15

申请号：US18569626

申请日：2022-08-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUTA NAGATOMI ,  MASAFUMI NAKAMURA ,  MASATOSHI NAKASE ,  HIROKI AKASHI ,  KINYA KATO

IPC: H02J9/06 ,  H02J7/00 ,  H02J7/34

CPC classification number: H02J9/061 ,  H02J7/00714 ,  H02J7/34 ,  H02J2207/20

Abstract: A backup power supply system (1) includes a first terminal (T1), a second terminal (T2), a disconnect device (10), a current detector (20), a charge/discharge device (30), an auxiliary power supply (40), and a controller (50). The disconnect device (10) is connected between the first terminal (T1) configured to be connected to a main power supply (2) and the second terminal (T2) configured to be connected to a load (3). The charge/discharge device (30) is connected between the auxiliary power supply (40) and a node (P1) between the disconnect device (10) and the second terminal (T2). The charge/discharge device (30) is configured to receive power supplied from main power supply (2) to cause a charging current to flow to the auxiliary power supply (40) in a non-defective state in which the main power supply (2) is not defective. The charge/discharge device (30) is configured to receive power supplied from the auxiliary power supply (40) to cause a discharging current to flow to the load (3) in a defective state. The controller (50) is configured to have the disconnect device (10) be in a connecting state while the current detector (20) does not detect the discharging current, and to have the disconnect device (10) be in a disconnecting state while the current detector (20) detects the discharging current.

公开(公告)号：US20230336171A1

公开(公告)日：2023-10-19

申请号：US17998658

申请日：2021-04-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUSUKE KINOSHITA ,  YUTA NAGATOMI ,  RYOSUKE MAEDA ,  SATOSHI NAKAZAWA

IPC: H03K17/082

CPC classification number: H03K17/0822

Abstract: A power loss of a switching device is suppressed. Circuit for a switching device is used in switching device. Switching device includes first path and second path. First path includes first field effect transistor and first inductor. Second path includes second field effect transistor and second inductor. First path and second path are connected in parallel to power supply. A first maximum current that is a maximum current during conduction of first field effect transistor is smaller than a second maximum current that is a maximum current during conduction of second field effect transistor. Circuit for a switching device includes processing part. Processing part executes a specific operation according to a voltage difference between voltage across first inductor and voltage across second inductor.