公开(公告)号：US09618480B2

公开(公告)日：2017-04-11

申请号：US14847751

申请日：2015-09-08

Applicant: Hitachi, Ltd

Inventor： Isao Hoda ,  Hua Zeng ,  Masayoshi Takahashi ,  Hiroki Funato

IPC: G01N27/82 ,  G01N27/83 ,  B23K31/12 ,  G01N27/90 ,  G01N27/72 ,  G01R33/12

CPC classification number: G01N27/82 ,  B23K11/11 ,  B23K31/125 ,  G01N27/72 ,  G01N27/87 ,  G01N27/9046 ,  G01R33/10 ,  G01R33/12

Abstract: An apparatus and method for inspecting the quality of a weld under test in a structure having a plurality of spaced apart welds. Two probes are placed on opposite sides of the structure so that a current path is formed through the weld under test. The probes are energized with alternating current at a known frequency. The magnetic flux generated from the current flow through the probes and at least one of the spaced apart welds is then measured and subsequently compared with magnetic flux data previously determined and representing weld quality.

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.

公开(公告)号：US10099704B2

公开(公告)日：2018-10-16

申请号：US15460817

申请日：2017-03-16

Applicant: HITACHI, LTD.

Inventor： Aya Ohmae ,  Hiroki Funato ,  Keisuke Fukumasu

IPC: B60W50/04 ,  G05B17/02

Abstract: Provided is an electromagnetic noise analyzing apparatus, a controlling apparatus, and a controlling method in each of which the continuous change of the running state of a vehicle or a railway vehicle is considered. The controlling apparatus includes: a vehicle running control section which outputs, on the basis of operation information of a vehicle, a vehicle driving parameter as a driving state of the vehicle; a signal converting section which converts the vehicle driving parameter into a noise parameter as an electric parameter; and an electromagnetic noise analyzing section which calculates, on the basis of the noise parameter, the amount of electromagnetic noise propagating in the vehicle.

公开(公告)号：US20150028888A1

公开(公告)日：2015-01-29

申请号：US13950403

申请日：2013-07-25

Applicant: Hitachi, Ltd.

Inventor： Yoshiyuki Tsuchie ,  Hua Zeng ,  Masayoshi Takahashi ,  Hiroki Funato

IPC: G01R29/26

CPC classification number: G01R29/26 ,  G01R29/0814 ,  G01R31/001 ,  G01R31/007

Abstract: A system and method for identifying an electrical noise propagation path through an object, such as an automotive vehicle, from a source of periodic electrical noise. An electrical noise sensor is positioned at a selected area on the object which generates an output signal representative of the magnitude of the electrical noise. A trigger generator generates a trigger signal in synchronism with a source of periodic electrical noise and that trigger signal is connected as an input signal to measurement equipment connected to the sensor to initiate electrical noise reading by the sensor. A recorder then records the output from the sensor. The electrical noise sensor is moved to different areas on the object to determine the electrical noise propagation path.

Abstract translation: 用于从周期性电噪声源识别通过物体（例如机动车辆）的电噪声传播路径的系统和方法。 电噪声传感器位于物体上的选定区域，其产生表示电噪声幅度的输出信号。 触发发生器与周期性电噪声源同步产生触发信号，并且触发信号作为输入信号连接到连接到传感器的测量设备，以启动传感器的电噪声读数。 然后记录仪记录传感器的输出。 电噪声传感器被移动到物体上的不同区域以确定电噪声传播路径。

公开(公告)号：US20140372092A1

公开(公告)日：2014-12-18

申请号：US14370433

申请日：2013-02-06

Applicant: Hitachi, Ltd.

Inventor： Hiroki Funato ,  Takashi Suga ,  Yoshiyuki Tsuchie ,  Satoshi Nakamura

IPC: G06F17/50

CPC classification number: G06F17/5009 ,  G01R29/0814 ,  G06F17/5036 ,  G06F17/5095 ,  G06F2217/82 ,  Y02T10/82

Abstract: An object of the present invention is to provide an EMC design technique of a device including an electronic device mounted therein for implementing noise amount analysis of a system in which individual electronic devices are combined. A housing model is acquired, component models are selected and acquire, the acquired component models are connected using a wire, the acquired component models are arranged in the acquired housing model, the arranged component models connected using the wire is driven to generate electromagnetic noise from the component models and the wire, the generated electromagnetic noise is propagated in the housing model to calculate a noise amount, and an output process of outputting data of the calculated noise amount is performed. Thus, even in the system in which a plurality of electronic devices are combined, electromagnetic noise analysis of the system can be easily performed, and a noise reduction design can be supported.

Abstract translation: 本发明的目的是提供一种包括安装在其中的电子设备的设备的EMC设计技术，用于实现其中组合各个电子设备的系统的噪声量分析。 获取住房模型，选择和采集组件模型，使用线将所采集的组件模型连接在一起，将所获取的组件模型布置在获取的房屋模型中，使用导线连接的排列组件模型被驱动以产生电磁噪声 组件模型和电线，所产生的电磁噪声在外壳模型中传播以计算噪声量，并且执行输出计算噪声量的数据的输出处理。 因此，即使在组合了多个电子装置的系统中，也可以容易地进行系统的电磁噪声分析，并且可以支持降噪设计。