公开(公告)号：US20190356239A1

公开(公告)日：2019-11-21

申请号：US16525125

申请日：2019-07-29

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  FURUKAWA AUTOMOTIVE SYSTEMS INC.

Inventor： Akihiro OKUDERA ,  Takezo SUGIMURA ,  Ryosuke TAMURA

IPC: H02M7/5387 ,  F02N11/08

Abstract: Provided are a control method and a control device for an inverter being capable of soft start using soft switching without causing a voltage surge or a current surge. A control method for soft start using soft switching of an inverter, the inverter being a bridge circuit with at least two upper and lower arms, the control method including: shifting phases of gate pulses for a switching element of the upper arm and a switching element of the lower arm, which are paired for current energization, from each other to form an overlap period of both the gate pulses; and changing magnitude of the shift to gradually increase the overlap period that defines an energization period to implement the soft start using the soft switching.

公开(公告)号：US20230219167A1

公开(公告)日：2023-07-13

申请号：US18185415

申请日：2023-03-17

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Atsushi OGINO ,  Ryosuke TAMURA ,  Kousuke KASHIWAGI ,  Masakazu YOSHIHARA ,  Keisuke TOMINAGA ,  Takashi KAYAHARA ,  Keigo MATSUNAGA

IPC: B23K26/0622 ,  B23K26/08

CPC classification number: B23K26/0622 ,  B23K26/0869 ,  B23K2101/18

Abstract: A laser processing method of laser processing a workpiece made of at least one sheet of metallic foil includes: generating laser light by supplying pulsed pumping energy to a laser medium, the laser light including an optical pulse component and a continuous light component that is continuous with the optical pulse component and temporally after the optical pulse component; irradiating a surface of the workpiece with the laser light; and limiting duration of the continuous light component such that a ratio of energy of the continuous light component to energy of the optical pulse component is equal to or less than a predetermined value.

公开(公告)号：US20170331369A1

公开(公告)日：2017-11-16

申请号：US15668079

申请日：2017-08-03

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  FURUKAWA AUTOMOTIVE SYSTEMS INC.

Inventor： Kaoru SUGIMOTO ,  Ryosuke TAMURA ,  Shusuke KAYA ,  Takezo SUGIMURA

IPC: H02M3/155 ,  H02M3/06

CPC classification number: H02M3/155 ,  H02M1/32 ,  H02M3/06 ,  H02M3/156 ,  H03K17/0822 ,  H03K2017/6875

Abstract: A power conversion device converting and outputting a characteristic of input power, includes: a power conversion unit including a normally-on type first switching element made of a nitride-based semiconductor material and converting the characteristic of power by a switching operation performed by the first switching element; an operation control unit controlling a switching operation of the first switching element; and an intelligent power switch including: a second switching element provided on a power input side of the power conversion unit and turning on/off power input to the power conversion unit; and a protection control unit including a current detection unit detecting a current flowing in the second switching element and controlling on/off of the second switching element and turn off the second switching element in a case where a current detected by the current detection unit exceeds a threshold value.