公开(公告)号：US10979014B2

公开(公告)日：2021-04-13

申请号：US16682032

申请日：2019-11-13

Applicant: Hitachi, Ltd.

Inventor： Hitoshi Taniguchi ,  Hiroki Funato

IPC: H03H7/01 ,  H02M3/156 ,  H02M7/5395

Abstract: To improve the performance of the voltage filter. Rather than reducing an area of a region surrounded by a closed loop formed in a voltage filter 12A, an induced electromotive force generated in the voltage filter 12A itself is reduced by forming a pair of a closed loop CA and a closed loop CB in which the directions of the generated induced electromotive forces are opposite to each other by making a wiring 100 (anode wiring) intersect a wiring 200 (cathode wiring).

公开(公告)号：US20180076911A1

公开(公告)日：2018-03-15

申请号：US15461859

申请日：2017-03-17

Applicant: HITACHI, LTD.

Inventor： Hitoshi Taniguchi ,  Hiroki Funato ,  Isao Hoda

IPC: H04B17/345

CPC classification number: H04B17/345

Abstract: The present disclosure generally relates to a signal transmission path evaluation device and method for evaluating EMC resistance of a signal transmission path using a computer system. An operating device of the computer system is input with signal transmission line shape data, signal transmission line path data, signal transmission line shape dispersion data, and margin information for noise input of a communication device connected to the signal transmission line. Calculations are performed including an electric field or a magnetic field in a vicinity of the signal transmission line path from the signal transmission line path data, dispersion of the signal line transmission line shape via a random number, noise waveform at a communication device input from the electric field or the magnetic field in the vicinity of the signal transmission path, error occurrence determination, and error rate from plural time trial results. Information concerning the calculated error rate is output.

公开(公告)号：US09973289B2

公开(公告)日：2018-05-15

申请号：US15461859

申请日：2017-03-17

Applicant: HITACHI, LTD.

Inventor： Hitoshi Taniguchi ,  Hiroki Funato ,  Isao Hoda

IPC: H04B17/00 ,  H04B17/345

CPC classification number: H04B17/345

Abstract: The present disclosure generally relates to a signal transmission path evaluation device and method for evaluating EMC resistance of a signal transmission path using a computer system. An operating device of the computer system is input with signal transmission line shape data, signal transmission line path data, signal transmission line shape dispersion data, and margin information for noise input of a communication device connected to the signal transmission line. Calculations are performed including an electric field or a magnetic field in a vicinity of the signal transmission line path from the signal transmission line path data, dispersion of the signal line transmission line shape via a random number, noise waveform at a communication device input from the electric field or the magnetic field in the vicinity of the signal transmission path, error occurrence determination, and error rate from plural time trial results. Information concerning the calculated error rate is output.

公开(公告)号：US11257616B2

公开(公告)日：2022-02-22

申请号：US16720995

申请日：2019-12-19

Applicant: Hitachi, Ltd.

Inventor： Masaki Noda ,  Hiroki Funato ,  Isao Hoda ,  Hitoshi Taniguchi

IPC: H02M1/44 ,  H01F27/08 ,  H01F27/24 ,  H02M7/00 ,  H03H7/01 ,  H01F27/40 ,  H02P27/06 ,  H02M7/537

Abstract: A high-voltage noise filter of a power conversion device includes: a metal housing; an anode bus bar connecting anodes of a power source and a power module; a cathode bus bar connecting cathodes thereof; a first magnetic core having a through hole where the anode bus bar and the cathode bus bar pass through; an X capacitor having one end connected to the anode bus bar, and the other end connected to the cathode bus bar; a first Y capacitor having one end connected to the anode bus bar, and the other end grounded; a second Y capacitor having one end connected to the cathode bus bar, and the other end grounded; and a first cooling unit connected to the first magnetic core and the metal housing. The anode bus bar partly faces the first cooling unit, and the cathode bus bar partly faces the first cooling unit.