Patents Assigned to Hitachi Industrial Products, Ltd.
  • Patent number: 11973397
    Abstract: A dynamo-electric machine which inhibits the vibration of a frame and a bearing and has excellent manufacturability. A dynamo-electric machine according to the present invention includes a stator, a rotor including a rotary shaft and being disposed on an inner side in a radial direction of the stator, a bearing for supporting the rotary shaft, an intermediate frame for supporting the stator, and a stator frame for supporting the bearing and the intermediate frame. The stator frame includes pedestals at two end portions in a width direction of a bottom portion of the stator frame. Each of the pedestals includes an upper surface positioned above a bottom surface of the stator frame. The intermediate frame is fixed to upper surfaces of the pedestals.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: April 30, 2024
    Assignee: HITACHI INDUSTRIAL PRODUCTS, LTD.
    Inventors: Takayuki Koyama, Kenichi Sugimoto
  • Patent number: 11598694
    Abstract: The present invention provides an abnormality diagnosis system capable of identifying an abnormality occurrence site in a rotary electric machine by use of output of sensors mounted to a bearing of the rotary electric machine. The abnormality diagnosis system includes: a rotary electric machine that has a main shaft secured to a center of a rotor and supported by a bearing; a vibration sensor that measures a vibration value of the bearing; a speed sensor that measures a rotational speed value of the main shaft; and an abnormality diagnosis apparatus that diagnoses abnormality in the rotary electric machine based on the vibration value and the rotational speed value.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 7, 2023
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Shuhei Ayukawa, Yasushi Hayasaka, Motonobu Iizuka, Takeki Hara, Masaaki Endo, Atsushi Fukunaga
  • Patent number: 11440733
    Abstract: Provided is a picking assistance system that can improve work efficiency. A picking assistance system includes: a plurality of movable shelves configured to be able to accommodate at least one article; and a control device configured to control the movement of each of the shelves. The control device causes a series of processes of moving a sorting shelf selected from the shelves to a work station selected from a plurality of work station and moving articles from a deposit shelf disposed at the selected work station to the sorting shelf by a picking operation to be executed repeatedly while changing the work station until the sorting shelf accommodates prescribed articles.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: September 13, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Masaharu Kondou, Ryota Kamoshida, Hiroshi Yoshitake
  • Patent number: 11387701
    Abstract: A highly reliable rotating electric machine is provided in which the amount of charge discharged by partial discharge can be reduced while the machine is downsized by decreasing the thickness of insulation for coils, and it is possible to prevent paper flapping in coil end portions because of rotating wind produced by rotation of the rotor.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: July 12, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Yuuichirou Yoshitake, Shoichi Maruyama, Yuuki Kasai, Manabu Suzuki
  • Patent number: 11374454
    Abstract: A dynamo-electric machine with discharge reduced in a core slot without relation to a position of a stator coil placed in the core slot is provided. For that purpose, the present invention includes: a stator coil including a coil conductor and a main insulation layer covering a surface of the coil conductor; a core slot containing the stator coil; a first semiconducting layer that is placed between the stator coil and the core slot and is wrapped around and in contact with the main insulation layer; and a second semiconducting layer that is wrapped around the stator coil and in contact with the core slot, with the second semiconducting layer overlaid on the first semiconducting layer. The first semiconducting layer has a surface facing toward the core slot and a release layer is formed on the surface facing toward the core slot. The first semiconducting layer has electric connection with an inner peripheral surface of the core slot via the second semiconducting layer.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: June 28, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Yuuki Kasai, Yuuichirou Yoshitake, Hiroaki Kojima
  • Patent number: 11346364
    Abstract: There is provided a multistage centrifugal fluid machine capable of improving efficiency of an operation for assembling an inner casing to a high pressure side head flange. The multistage centrifugal fluid machine 100 includes a rotor 3 provided with a plurality of impellers (41 to 81) in an axial direction, a cylindrical outer casing 2, and an inner bundle 1 that is fitted with the outer casing 2 to form a flow passage for the working fluid. The inner bundle 1 includes a high pressure side head flange 11, a low pressure side head flange 12, and an inner casing 5 disposed between the high pressure side head flange 11 and the low pressure side head flange 12. The high pressure side head flange 11 and the inner casing 5 are fastened with a first bolt 142 via an elastic body 144.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: May 31, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Hayato Kunishi, Tomohiro Naruse, Takeshi Kazama, Kazuo Takeda, Hiroaki Yoshimura
  • Patent number: 11319967
    Abstract: The present invention provides a centrifugal multistage compressor adapted to inhibit corrosion of an intermediate stage labyrinth. More particularly, the present invention provides a centrifugal multistage compressor adapted to inhibit carbon dioxide corrosion of the intermediate stage labyrinth.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: May 3, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Kohei Nishida, Tomohiro Naruse, Kiyotaka Hiradate
  • Patent number: 11280223
    Abstract: A bolt fastening structure has an upper flange and a lower flange of a casing to which inner pressure is applied, the upper flange and the lower flange defining an abutting interface therebetween; a bolt hole formed through the abutting interface; and a counterbored portion formed asymmetric about a bolt hole center. The abutting interface includes a first region extending from a bolt hole inner side edge to an upper and lower flanges inner edge and being a region where the upper flange and the lower flange are in surface-to-surface contact with each other; and a partial contact region extending from a bolt hole outer side edge to an upper and lower flanges outer edge and being a region where the upper flange and the lower flange are partially in surface-to-surface contact with each other. In the partial contact region, the upper flange and the lower flange are in surface-to-surface contact with each other in a second region, and the first region is larger than the second region.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: March 22, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Youhei Tanno, Takeshi Kazama, Ryuhei Tsukahara, Taiji Hashimoto, Tomohiro Naruse
  • Patent number: 11255377
    Abstract: A tilting-pad-type journal bearing includes a rotary shaft, a plurality of tilting pads, a housing, a fixing structure, an oil inlet, and side plates. The plurality of tilting pads support the rotary shaft in a radial direction. The housing accommodates the plurality of tilting pads inside. The fixing structure fixes a circumferential relative position with respect to the housing while allowing the tilting pads to swing. The oil inlet supplies lubricating oil between the tilting pads and the rotary shaft. The side plates are provided on both sides of the housing in a rotational-axis direction.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: February 22, 2022
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Isao Hagiya, Naohiko Takahashi, Jun Ichimura
  • Patent number: 11204062
    Abstract: A tilting pad journal bearing is arranged such that a circumferential relative position of an opening portion of an oil feeding hole to supply lubricant oil to a sliding portion of a bearing pad with respect to the bearing pad differs depending on the position of each bearing pad. For a bearing pad under a rotary shaft which supports the load of the rotary shaft, the circumferential position of an opening portion of an oil feeding hole with respect to the bearing pad is set toward an upstream side of a space between pads in a rotating direction of the rotary shaft. For a bearing pad above the rotary shaft, the circumferential position of an opening portion of an oil feeding hole with respect to the bearing pad is set toward a downstream side of a space between pads in the rotating direction of the rotary shaft.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: December 21, 2021
    Assignee: HITACHI INDUSTRIAL PRODUCTS, LTD.
    Inventors: Makoto Hemmi, Naohiko Takahashi, Jun Ichimura, Motoki Sato
  • Patent number: 11164274
    Abstract: An article conveyance system includes: a processor; and a storage device accessed by the processor, in which the processor calculates a conveyance time until a conveyance device conveys a shelf being a target for work of taking out or storing an article to a work place where the work on the shelf is performed and a work time until work scheduled to be performed at the work place is ended; and the processor determines whether or not to add an instruction to cause the conveyance device to convey the shelf to the work place based on a difference between the conveyance time and the work time.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: November 2, 2021
    Assignee: HITACHI INDUSTRIAL PRODUCTS, LTD.
    Inventors: Hiroshi Yoshitake, Ryota Kamoshida, Yoshikazu Nagashima, Masaharu Kondou
  • Patent number: 11152870
    Abstract: A power conversion device that suppresses voltage pulsation of a capacitor of a power converter with respect to a control target whose effective power is to be controlled is provided. The power conversion device includes a plurality of power conversion cells that are connected to each other, and convert a primary-side system voltage into a secondary-side system voltage, a capacitor that is connected to each of the plurality of power conversion cells, and a power conversion cell driver that drives the power conversion cells to add a 3N order higher-harmonic-wave voltage of each of alternating voltages of the plurality of power conversion cells to the each of alternating voltages, and output a voltage made by adding the each of alternating voltages and the 3N order higher-harmonic-wave voltage, when N is a natural number.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: October 19, 2021
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Kimihisa Furukawa, Akihiko Kanouda, Yuuichi Mabuchi, Hiroyuki Shoji, Takae Shimada, Mitsuhiro Kadota, Mizuki Nakahara
  • Patent number: 11108334
    Abstract: Provided is a power conversion device which can be configured inexpensively and in which initial charging can be performed quickly. Accordingly, the power conversion device is provided with: a power conversion device cell having a first converter for converting a first AC voltage to a first DC voltage, a second converter for converting the first DC voltage to another voltage, and a first capacitor charged by the first DC voltage; and a control circuit for allowing charging of the first capacitor while changing the operational state of the first converter in accordance with the first DC voltage.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: August 31, 2021
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Mizuki Nakahara, Takae Shimada, Kimihisa Furukawa, Mitsuhiro Kadota
  • Patent number: 11075570
    Abstract: There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as ?0, a relationship of ws>?0×I1×Tr/0.6 is met.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: July 27, 2021
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Kazuo Nishihama, Masanori Sawahata, Takayuki Koyama, Makoto Imura, Yuuichirou Yoshitake, Kenichi Sugimoto, Kengo Ueda
  • Patent number: 10965184
    Abstract: A rotary electric machine of the present invention includes: a stator; a rotor placed on an inner diameter side of the stator through an air gap and fixed to a rotating shaft; a stator frame supporting the stator; a casing storing the stator and the rotor; an outer fan fixed to the rotating shaft; a heat exchanger installed above the casing for heat exchange between outside air taken through the outer fan and internal air to remove heat; and an outer fan duct installed on an end portion of the casing in an axial direction, provided with the outer fan in an inside of the outer fan duct, and formed with a ventilation path through which the outside air is delivered to the heat exchanger. A plate-shaped member has at least a curved surface portion. The plate-shaped member forms the ventilation path of the outer fan duct.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 30, 2021
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Misato Sato, Takeshi Mori, Kenichi Sugimoto, Takayuki Koyama
  • Patent number: 10840015
    Abstract: In some examples, a rotatable transformer includes a first core half mounted on a rotor and a second core half mounted on a stator. Each core half may include a first element having a ring shape and constructed of a laminated sheet material layered in a radial direction from an axis of rotation of the rotor, and a second element having a ring shape and constructed of a laminated sheet material layered in a direction of the axis of rotation. The second element may be positioned adjacent to the first element and at angle thereto, and a coil winding may be located in an area of the angle formed by the first element and the second element. The first core half and the second core half may be positioned adjacent to each other with a gap there between. The gap may be conical about the axis of rotation.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: November 17, 2020
    Assignee: HITACHI INDUSTRIAL PRODUCTS, LTD.
    Inventor: Michael J. Lubas
  • Patent number: 10793353
    Abstract: An article conveyance system includes a controller and a conveyance device. The controller includes: a storage section storing information concerning a position of a housing section stored in a shelf; a housing-section retrieving section retrieving, based on the information concerning the position of the housing section, housing positions of a plurality of the housing sections, which are picking targets, in the shelf; a route generating section generating a route that makes rounds of positions of the housing sections retrieved by the housing-section retrieving section; and a transmitting section transmitting information concerning the generated route and the housing positions of the housing sections to the conveyance device.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: October 6, 2020
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Koichi Nakano, Yoriko Kazama, Junichi Kimura, Hiroshi Yoshitake
  • Patent number: 10797565
    Abstract: A motor with an inner fan includes a rotor rotating with a shaft, a stator opposing the outer peripheral surface of the rotor, an end ring connected to the rotor, stator wiring connected to the stator, a fan rotating with the shaft through a sleeve, a fan guide opposing the tip end of the blade outer periphery of the fan, and a frame storing the rotor, the stator, the fan, the fan guide, the end ring, and the stator wiring. The rotor includes an axial duct penetrating the rotor in the axial direction of the rotor and a radial duct communicating with the axial duct and penetrating the rotor radially from the inside to the outside of the rotor. The fan is an inner fan arranged inside the frame, the inner fan is of a diagonal flow type, and the discharge direction of the inner fan is the inward direction.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: October 6, 2020
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Isao Hagiya, Misato Sato, Takayuki Koyama, Kenichi Sugimoto
  • Patent number: 10788833
    Abstract: Provided is a transport system in which a worker performs maintenance work on a shelf in a maintenance area within a warehouse in which a vehicle area where a transport vehicle travels and the maintenance area where the worker performs the maintenance work are formed separately. A safety device permits an entry of the worker into the maintenance area after the transport vehicle transporting the shelf takes the shelf down within the maintenance area in accordance with a travel instruction from a service device and then the transport vehicle within the maintenance area exits to the vehicle area.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: September 29, 2020
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Manabu Fujii, Tsutomu Ito, Daisuke Noguchi, Jingpeng Xu, Kunihiko Aoki
  • Publication number: 20200273132
    Abstract: An article conveyance system includes: a processor; and a storage device accessed by the processor, in which the processor calculates a conveyance time until a conveyance device conveys a shelf being a target for work of taking out or storing an article to a work place where the work on the shelf is performed and a work time until work scheduled to be performed at the work place is ended; and the processor determines whether or not to add an instruction to cause the conveyance device to convey the shelf to the work place based on a difference between the conveyance time and the work time.
    Type: Application
    Filed: February 6, 2020
    Publication date: August 27, 2020
    Applicant: HITACHI INDUSTRIAL PRODUCTS, LTD.
    Inventors: Hiroshi YOSHITAKE, Ryota KAMOSHIDA, Yoshikazu NAGASHIMA, Masaharu KONDOU