公开(公告)号：US20240280635A1

公开(公告)日：2024-08-22

申请号：US18570157

申请日：2022-03-22

Applicant: Hitachi, Ltd.

Inventor： Takashi ENDO ,  Takeshi IWATA ,  Toshiaki ROKUNOHE ,  Hikaru KOYAMA ,  Kota DOHI

IPC: G01R31/327 ,  H04R3/00

CPC classification number: G01R31/327 ,  H04R3/00

Abstract: The acoustic diagnosis device extracts a second feature amount of an acoustic signal in which a delay of an acoustic signal collected by the microphone is corrected, the delay being generated from a relative distance between the circuit breaker and the microphone, during diagnosis of the circuit breaker, calculates a similarity between the second feature amount of the acoustic signal during the diagnosis and the first feature amount in the plurality of event models for each time, estimates the time at which the similarity becomes highest, as an occurrence timing of each event, and diagnoses the circuit breaker from a plurality of estimated occurrence timings.

公开(公告)号：US20130270825A1

公开(公告)日：2013-10-17

申请号：US13859045

申请日：2013-04-09

Applicant: HITACHI, LTD.

Inventor： Takeshi IWATA ,  Norihito YANAGITA ,  Tatsuro KATO

IPC: H02P9/02

CPC classification number: H02P9/02 ,  F03D9/25 ,  F03D80/60 ,  Y02E10/721 ,  Y02E10/722 ,  Y02E10/726

Abstract: In a wind power generator, a nacelle is located on an upper portion of a support rod, a rotor head having wind turbine blades fitted thereto is rotatably supported to a front end side of the nacelle, and a main shaft rotating integrally with the rotor head, a gear box coupled with the main shaft which rotates while the wind turbine blades receive a wind power, a power generator having a rotor driven by a shaft output of the gear box, a brush, and a slip ring, and a humidity management device controlling humidity inside of the power generator having the brush and the slip ring, are installed in an interior of the nacelle.

Abstract translation: 在风力发电机中，机舱位于支撑杆的上部，具有安装有风力涡轮机叶片的转子头可旋转地支撑在机舱的前端侧，主轴与转子头一体旋转 与主轴联接的齿轮箱，在风力涡轮机叶片接收风力的同时转动，具有由齿轮箱的轴输出驱动的转子的发电机，刷子和滑环，以及湿度管理装置 在具有刷子和滑环的发电机内部控制湿度安装在机舱的内部。

公开(公告)号：US20160118867A1

公开(公告)日：2016-04-28

申请号：US14919899

申请日：2015-10-22

Applicant: Hitachi, Ltd.

Inventor： Takeshi IWATA ,  Hiroaki KOJIMA ,  Motonobu IIZUKA

IPC: H02K13/00 ,  H02K5/14 ,  H02K11/00

CPC classification number: H02K5/141 ,  H01R4/01 ,  H01R39/381 ,  H02K9/28 ,  H02K11/25

Abstract: The present invention provides a rotating machine which can maintain good contact state between the brush and the metal rotating body. A rotating machine of the present invention includes a stator including a stator winding, a rotor including a rotor winding and rotatably disposed apart from the stator with a gap, a metal rotating body electrically coupled with the rotor winding, a brush in contact with the metal rotating body, and a pressing mechanism for increasing pressure to press the brush against the metal rotating body when contact failure occurs between the metal rotating body and the brush.

Abstract translation: 本发明提供一种能够保持刷子与金属旋转体之间良好的接触状态的旋转机械。 本发明的旋转机械包括定子，定子包括定子绕组，转子包括转子绕组，并且与定子间隔可旋转地设置有与转子绕组电连接的金属旋转体，与金属接触的刷子 旋转体和用于在金属旋转体和刷子之间发生接触不良时增加压力以将刷子压靠在金属旋转体上的按压机构。

公开(公告)号：US20140118746A1

公开(公告)日：2014-05-01

申请号：US14065531

申请日：2013-10-29

Applicant: HITACHI, LTD.

Inventor： Norihito YANAGITA ,  Tatsuro KATO ,  Takeshi IWATA

IPC: G01N21/55

CPC classification number: G01N21/55 ,  G01N21/314 ,  G01N21/8422 ,  G01N2021/8427 ,  G01N2021/945 ,  G01N2201/0618 ,  H02K11/20 ,  H02K13/00

Abstract: Disclosed are equipment and method for diagnosing the sliding condition of a rotating electrical machine that make it possible to achieve early detection of abnormal sliding with a simple configuration containing flexibly arranged elements and reduce the downtime and maintenance cost of the rotating electrical machine. The equipment for diagnosing the sliding condition of a rotating electrical machine includes a light source that emits light onto the sliding surface of a collecting brush relative to the surface of a rotating body of the rotating electrical machine, a light-receiving section that receives the light reflected from the sliding surface, and a determination section that processes a signal from the light-receiving section. The determination section detects an increase in a specific wavelength component of the reflected light to determine whether the sliding condition of the rotating body surface of the rotating electrical machine is abnormal.

Abstract translation: 公开了用于诊断旋转电机的滑动状态的设备和方法，其能够以包含灵活布置的元件的简单配置来实现异常滑动的早期检测，并且减少了旋转电机的停机时间和维护成本。 用于诊断旋转电机的滑动状态的设备包括：相对于旋转电机的旋转体的表面将光发射到集电刷的滑动面上的光源;受光部，其接收光 从滑动面反射的判定部和处理来自受光部的信号的判定部。 确定部分检测反射光的特定波长分量的增加，以确定旋转电机的旋转体表面的滑动状态是否异常。