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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.
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公开(公告)号：US09805147B2
公开(公告)日：2017-10-31
申请号：US14370433
申请日：2013-02-06
Applicant: Hitachi, Ltd.
Inventor： Hiroki Funato , Takashi Suga , Yoshiyuki Tsuchie , Satoshi Nakamura
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.
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公开(公告)号：US20170067854A1
公开(公告)日：2017-03-09
申请号：US14847751
申请日：2015-09-08
Applicant: Hitachi, Ltd
Inventor： Isao Hoda , Hua Zeng , Masayoshi Takahashi , Hiroki Funato
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.
Abstract translation: 一种用于在具有多个间隔开的焊缝的结构中检查被测焊缝质量的装置和方法。 两个探针放置在结构的相对两侧，使得通过被测焊缝形成电流路径。 探头以已知频率的交流电通电。 然后测量从流过探头的电流产生的磁通量和至少一个间隔开的焊缝，并随后与先前确定的并表示焊接质量的磁通量数据进行比较。
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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).
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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.
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Patent Agency Ranking
公开(公告)号：US20160182001A1
公开(公告)日：2016-06-23
申请号：US14576421
申请日：2014-12-19
Applicant: Hitachi, Ltd
Inventor： Hua Zeng , Yoshiyuki Tsuchie , Masayoshi Takahashi , Hiroki Funato
IPC: H03H1/00
CPC classification number: H03H1/0007
Abstract: A common mode noise filter adapted for connection in series between a noise source and a load having a first and second inductor connected in series respectively between the noise source and the load. A capacitor which exhibits stray inductance is connected in series with a third inductor having its other end connected to a junction of the first and second inductors. The first, second, and third inductors are selected and positioned relative to each other so that an absolute value of the third inductor and mutual inductance of the first, second, and third inductors minus the stray inductance of the capacitor is minimized.
Abstract translation: 一种共模噪声滤波器，其适于串联连接在噪声源和具有分别连接在噪声源和负载之间的第一和第二电感器的负载之间。 具有杂散电感的电容器与其另一端连接到第一和第二电感器的结的第三电感器串联连接。 第一，第二和第三电感器相对于彼此选择和定位，使得第三电感器的绝对值和第一，第二和第三电感器的互感减去电容器的杂散电感最小化。
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公开(公告)号：US09285411B2
公开(公告)日：2016-03-15
申请号：US13950403
申请日：2013-07-25
Applicant: Hitachi, Ltd.
Inventor： Yoshiyuki Tsuchie , Hua Zeng , Masayoshi Takahashi , Hiroki Funato
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。
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公开(公告)号：US09991815B2
公开(公告)日：2018-06-05
申请号：US15315658
申请日：2015-06-26
Applicant: HITACHI, LTD.
Inventor： Hiroki Funato , Masayoshi Takahashi
CPC classification number: H02M7/003 , H02G5/02 , H02M7/04 , H02M7/44 , H05K7/1432
Abstract: A power conversion apparatus is provided with a bus bar connecting a cable connected to an external power supply or load and an internal circuit. To provide this power conversion apparatus with a wiring structure for noise propagation suppression without use of a filter circuit element that causes increase in the volume of the apparatus, the bus bar is provided with an electromagnetic band gap structure. Electromagnetic noise is thereby suppressed from propagating from the power conversion apparatus to the power supply or the load via the cable.
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公开(公告)号：US09210834B2
公开(公告)日：2015-12-08
申请号：US13837423
申请日：2013-03-15
Applicant: Hitachi, Ltd.
Inventor： Kinya Nakatsu , Takayoshi Nakamura , Ryuichi Saito , Takashi Suga , Hiroki Funato
IPC: H05K7/20 , H02M7/00 , H01L23/473 , H01L23/367
CPC classification number: H05K7/2089 , B60L3/003 , B60L11/123 , B60L11/14 , B60L11/1861 , B60L15/007 , B60L15/20 , B60L2210/10 , B60L2210/30 , B60L2210/40 , B60L2220/14 , B60L2220/42 , B60L2240/12 , B60L2240/36 , B60L2240/421 , B60L2240/441 , B60L2240/525 , B60L2260/26 , B60L2260/28 , H02M7/003 , H05K7/20927 , Y02T10/6217 , Y02T10/645 , Y02T10/646 , Y02T10/7005 , Y02T10/7022 , Y02T10/7044 , Y02T10/705 , Y02T10/7077 , Y02T10/7216 , Y02T10/7241 , Y02T10/7275 , Y02T90/16
Abstract: The object is to provide a power converter which is capable of minimizing an extent to which the power converter components other than the semiconductor module are thermally affected by the heat originating from the semiconductor module. The semiconductor modules constituting a main circuit for power conversion; a capacitor electrically connected to the main circuit; drive circuits that provide the main circuit with a drive signal used in power conversion operation; a control circuit that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within a casing, a cooling chamber including a coolant passage is formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modules are housed inside the cooling chamber, and at least the capacitor and the control circuit are disposed outside the cooling chamber.
Abstract translation: 本发明的目的是提供一种功率转换器，该功率转换器能够最小化半导体模块以外的功率转换器部件受来自半导体模块的热的热影响的程度。 所述半导体模块构成用于电力转换的主电路; 电连接到主电路的电容器; 为主电路提供用于电力转换操作的驱动信号的驱动电路; 为驱动电路提供用于提示驱动电路提供驱动信号的控制信号的控制电路。 在壳体内形成包括冷却剂通道的冷却室，并且用导热材料形成冷却室的室壁。 至少半导体模块容纳在冷却室内，并且至少电容器和控制电路设置在冷却室的外部。
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公开(公告)号：US10160334B2
公开(公告)日：2018-12-25
申请号：US15121310
申请日：2014-12-08
Applicant: Hitachi, Ltd.
Inventor： Isao Houda , Masayoshi Takahashi , Hiroki Funato , Hitoshi Akiyama
Abstract: Provided is a power conversion device capable of selectively suppressing harmonic noise in a frequency band and a machine equipped with the power conversion device. The power conversion device includes a switching element (13), a switching signal generation unit (23, 24) for generating a switching control signal for controlling the turning on/off of the switching element (13), and a control unit (18), and is characterized in that the switching control signal generation unit (23, 24) generates the switching control signal including a combination of a pair of symmetrical pulse waveforms having on and off periods that are interchanged with respect to a repeated cycle.
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