公开(公告)号：US20220247210A1

公开(公告)日：2022-08-04

申请号：US17767668

申请日：2020-12-04

Applicant: TDK Corporation

Inventor： Yoshinobu TAKAYANAGI ,  Akihiro UNNO ,  Saiki SHIGEMORI

IPC: H02J50/00 ,  H02M7/06 ,  H02J50/10

Abstract: An electromagnetic induction power generator includes a magnetic core attachable to a power transmission/distribution line, a power generating coil wound around the magnetic core, and a switching power supply circuit that converts AC appearing at both ends of the power generating coil into DC. The switching power supply circuit stops its switching operation based on a DC voltage level. The stop of the switching operation increases reactive power, allowing a stable power generating operation, i.e., a stable supply of active power irrespective of the amount of current flowing through the power transmission/distribution line. In addition, the amount of the reactive power can be finely adjusted based on the length of a period during which the switching operation is stopped, allowing a finer control of the reactive power.

公开(公告)号：US20240063718A1

公开(公告)日：2024-02-22

申请号：US18366328

申请日：2023-08-07

Applicant: TDK Corporation

Inventor： Saiki SHIGEMORI ,  Akihiro UNNO

IPC: H02M3/158 ,  H02M3/157 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M3/157 ,  H02M1/082 ,  H02M1/0009

Abstract: Disclosed herein is a switching power supply circuit that includes a switching circuit having an input node connected to an input power supply terminal and an output node connected to an output power supply terminal through an output switch, a feedback circuit configured to feed back information based on a voltage appearing at the output node to the switching circuit, and an activation circuit configured to turn ON the output switch after an elapse of a predetermined time after a voltage appearing at the output node exceeds a predetermined value. The switching circuit is configured to adjust a level of a voltage appearing at the output node based on the information to a predetermined level. The feedback circuit includes an adjustment mechanism configured to adjust a relation between a voltage appearing at the output node and the information.