Patents Assigned to Toshiba Mitsubishi-Electric Industrial Systems Corporation
  • Publication number: 20240226978
    Abstract: A plate crown control device controls tandem rolling equipment based on delivery-side plate crown setting calculation values of stands calculated by setting calculation, mechanical plate crown setting calculation values of the stands, and setting values of bending forces and shift positions of the stands. A processor calculates first learning current values based on differences between mechanical plate crown observation values and mechanical plate crown actual calculation values. The processor prorates first learning values with first learning current values and smoothing gains and updates the first learning values. The processor calculates, in the setting calculation for the next and subsequent materials, setting values of bending forces and shift positions of the stands using mechanical plate crown setting calculation values after correction obtained by adding the first learning values to the mechanical plate crown setting calculation values.
    Type: Application
    Filed: April 20, 2022
    Publication date: July 11, 2024
    Applicant: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Mitsuhiko SANO, Atsushi SUZUKI
  • Publication number: 20240237310
    Abstract: An electric power conversion unit includes a housing, a plurality of fans, a heat sink, and a plurality of semiconductor elements. The fan generates a flow of air at an inside of the housing. The heat sink forms a flow path of the air on an upstream side of a flow route of the air at the inside of the housing. The plurality of semiconductor elements is arranged and aligned along a direction which intersects a flow direction of the air in the heat sink on an element arrangement plane of the heat sink.
    Type: Application
    Filed: June 17, 2022
    Publication date: July 11, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Kenshi NAGUMO
  • Publication number: 20240213888
    Abstract: First to third capacitors (UC1 to UC3) each have an identical shape of a rectangular parallelepiped. The rectangular parallelepiped has a first surface (P1) with a first side and a second side orthogonal to each other, a second surface (P2) with the second side and a third side orthogonal to each other, and a third surface (P3) with the third side and the first side orthogonal to each other. The first side has a length not less than twice and less than three times a length of the third side. The first and second capacitors (UC1, UC2) are arranged such that the first surfaces (P1) thereof are perpendicular to an installation surface (10), the first surfaces (P1) face each other while being spaced apart from each other, and the second surfaces (P2) are horizontal to the installation surface (10).
    Type: Application
    Filed: February 16, 2022
    Publication date: June 27, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yuhei WADA, Jumpei ISOZAKI, Taichiro TSUCHIYA
  • Publication number: 20240213775
    Abstract: A power conversion device includes a major circuit part converting a power of a distributed power source into AC power corresponding to a power system, and a controller controlling an operation of the major circuit part; the controller includes an estimated value calculation part and a reactive power calculation part; the estimated value calculation part calculates an estimated value of a resistance component of a system impedance of the power system, an estimated value of a reactance component of the system impedance, and an estimated value of a voltage value of the infinite bus power system based on an active power value of a connection point to the power system, a reactive power value of the connection point, and a voltage value of the connection point.
    Type: Application
    Filed: March 3, 2022
    Publication date: June 27, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Takashi SHIGEMASA, Hiroyuki KOURA
  • Publication number: 20240204720
    Abstract: A solar power generation system includes solar cell panels, power conversion devices, and a control device; the plurality of power conversion devices convert direct current power supplied from the plurality of solar cell panels into alternating current power corresponding to a power system, the plurality of power conversion devices supply, to the power system, the alternating current power; the control device includes a total output value calculation part, a difference calculation part, and an upper limit command value calculation part, the total output value calculation part is configured to calculate a total active power value indicating a magnitude of currently-outputtable active power from all of the plurality of power conversion devices, the difference calculation part is configured to calculate a difference between a total upper limit command value and the total active power value, and calculate a difference per device of the plurality of power conversion devices.
    Type: Application
    Filed: February 28, 2022
    Publication date: June 20, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Hirokazu KOIKE
  • Publication number: 20240201646
    Abstract: A SCADA web HMI client device comprises a processor and a memory. The memory stores a user access level, image data for an HMI screen, and screen access authority information, all received from a web server. The screen access authority information includes an operation access level of the HMI screen and operation permission/prohibition of the HMI screen by the web browser. The processor draws the HMI screen in an operable state on the web browser in a case where the user access level is greater than or equal to the operation access level and where operation of the HMI screen by the web browser is permitted. The processor draws the HMI screen in an inoperable state on the web browser in a case where the user access level is less than the operation access level or operation of the HMI screen by the web browser is not permitted.
    Type: Application
    Filed: March 30, 2022
    Publication date: June 20, 2024
    Applicant: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Ryo SHIMIZU, Akira NOJIMA, Nobuo SHIMIZU
  • Publication number: 20240204542
    Abstract: A switching device for charging equipment includes a controller that controls the switching of the connections by a switching part, the switching part includes a plurality of first switching elements provided to correspond respectively to the plurality of power supplies; and a plurality of second switching elements located between each of the plurality of first switching elements and each of the plurality of charging stations, the plurality of second switching elements allow direct current power supplied from the plurality of power supplies to be selectively supplied via the plurality of first switching elements to each of the plurality of charging stations, the controller controls the switching of the connections by the switching part by controlling switching of each of the plurality of first switching elements and the plurality of second switching elements.
    Type: Application
    Filed: February 25, 2022
    Publication date: June 20, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Xiangguo WANG
  • Publication number: 20240195321
    Abstract: A drive system (1) drives a multi-phase AC motor (2) having a plurality of windings. The drive system (1) includes a first power converter (3U), a second power converter (3V), a first conversion controller (20U), and a second conversion controller (20V). The first power converter (3U) causes a current to flow through a winding of a first phase of the multi-phase AC motor (2). The second power converter (3V) causes a current to flow through a winding of a second phase of the multi-phase AC motor (2). The first conversion controller (20U) decides on either a three-level phase voltage waveform or a five-level phase voltage waveform on the basis of setting information for designating a type of phase voltage waveform and controls the first power converter (3U) so that the decided phase voltage waveform is output from the first power converter (3U).
    Type: Application
    Filed: February 8, 2021
    Publication date: June 13, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Shinya KAWAI, Kenshi TAKAO, Shunsuke TOBAYASHI, Chikara MORITO, Haruyuki YAMAGUCHI
  • Patent number: 12003183
    Abstract: A power conversion device includes: a housing including a floor, a ceiling, a front face; an input circuit part; a power conversion unit; a reactor; an output circuit; and an output terminal. These elements are arranged in a planar direction of the front face so as not to overlap each other. The input circuit part is provided above the floor, the output circuit part is provided below the ceiling and above the input circuit part, and the power conversion unit is provided above the input circuit part between the input circuit part and the output circuit part. The reactor is provided beside or above the power conversion unit between the input circuit part and the output circuit part. The input circuit part, the power conversion unit, the reactor, the output circuit part, and the output terminal are connected in series in this order through metal bus bars.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: June 4, 2024
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yuki Yoshizumi, Nobuhiro Takahashi
  • Publication number: 20240171000
    Abstract: This uninterruptible power supply includes a switch that is turned off while an AC power supply is normal and turned on during power failure, a converter that converts AC power supplied from the AC power supply into DC power to supply resultant DC power to a DC link portion while the AC power supply is normal, and that supplies DC power supplied from a battery through the switch to the DC link portion during power failure, an inverter that converts DC power from the DC link portion into AC power to supply resultant AC power to a load, and a chopper circuit that allows DC power from the DC link portion to be stored in the battery while the AC power supply is normal.
    Type: Application
    Filed: March 8, 2021
    Publication date: May 23, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Ryoji TSURUTA, Tomohiro TANAKA, Hiroshi MASUNAGA
  • Publication number: 20240162829
    Abstract: A power conversion device includes a housing, a door, a power converter, and a movable portion. Housing includes an opening and an internal space. Door is connected to housing. Power converter is disposed in internal space with a gap from housing. Movable portion is disposed in internal space. Movable portion is configured to be detachable with respect to power converter. Door is configured to be switchable between an open state in which opening is open and a closed state in which opening (OP) is closed. Power converter is configured to be grounded via movable portion in the open state of door. Power converter is configured to be disposed with a gap from movable portion in the closed state of door.
    Type: Application
    Filed: April 1, 2021
    Publication date: May 16, 2024
    Applicants: Mitsubishi Electric Corporation, Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Yasushige MUKUNOKI, Takeshi HORIGUCHI, Hiroki SHIGETA
  • Patent number: 11982696
    Abstract: A system includes an orthogonal coordinate signal generator that generates an orthogonal two-phase voltage signal from a three-phase voltage signal of three-phase alternating current power of a power system; and a frequency calculator including an angular frequency calculator calculating an angular frequency of the power system based on the two-phase voltage signal, and an arithmetic unit calculating a system frequency of the power system from the angular frequency. A prediction calculator calculates a predicted value of the angular frequency after a time has elapsed based on the angular frequency and a differential of the angular frequency. In a state in which the phase jump of the power system is not detected, the frequency calculator calculates the system frequency based on the angular frequency. When the phase jump of the power system is detected, the frequency calculator calculates the system frequency based on predicted value for a constant amount of time.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: May 14, 2024
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki Mitsugi, Takashi Shigemasa
  • Patent number: 11973351
    Abstract: A power converter includes a power conversion circuit including a direct-current terminal connected to a solar cell panel, and an alternating-current terminal connected to an alternating-current power system, the power conversion circuit being configured to convert direct-current power generated by the solar cell panel into alternating-current power and to supply the alternating-current power to the alternating-current power system; a current detection unit configured to detect a direct current flowing between the solar cell panel and the power converter; and a control circuit including a power generation mode in which the control circuit controls the power conversion circuit to output active power generated from the direct-current power generated by the solar cell panel to the alternating-current power system, and a reactive power compensation mode in which the control circuit controls the power conversion circuit to output reactive power to the alternating-current power system.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: April 30, 2024
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Tomoya Katsukura, Yoshihiro Tawada
  • Publication number: 20240136941
    Abstract: A power conversion device includes a first relay unit, one or more second relay units, and a safety control unit. The first relay unit includes a first logic processing unit that transmits a response signal supplied from a first power conversion unit and a response signal of a downstream side of its first relay unit to an upstream side. Each of the one or more second relay units includes a second logic processing unit that transmits a response signal transmitted from one second power conversion unit among the one or more second power conversion units and a response signal transmitted from a downstream side of the one second relay unit to an upstream side of the one second relay unit.
    Type: Application
    Filed: July 13, 2021
    Publication date: April 25, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Chikara MORITO, Shunsuke TOBAYASHI
  • Patent number: 11967894
    Abstract: A power converter includes: plural inverter units connected in parallel to a DC power supply, including a storage battery, on a DC side and a DC fuse in each of current paths between the DC power supply and the inverter units, the DC fuse configured to, when a short-circuit failure occurs in any of the inverter units, be blown in the current path between the DC power supply and the inverter unit having the short-circuit failure. The number of the inverter units is a number with which a condition that, when the DC fuse between the DC power supply and the inverter unit having the short-circuit failure is blown, none of a plurality of the DC fuses between the DC power supply and a plurality of other inverter units that do not have the short-circuit failure are blown is satisfied.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: April 23, 2024
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Yoshinori Tsuruma
  • Patent number: 11965917
    Abstract: A power measurement device includes: a first three-phase to two-phase converter converting a three-phase voltage signal of three-phase AC power into a two-phase voltage signal; a second three-phase to two-phase converter converting a three-phase current signal of the three-phase AC power into a two-phase current signal; an instantaneous power calculator calculating an instantaneous value of active power of the three-phase AC power and an instantaneous value of reactive power of the three-phase AC power based on the two-phase voltage signal and the two-phase current signal; a first moving average calculator calculating multiple active power average values of different moving average data quantities; a second moving average calculator calculating multiple reactive power average values of different moving average data quantities; and calculators that calculate average active powers corresponding to a frequency of the three-phase AC power, and the reactive power corresponding to the frequency of the three-phase A
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: April 23, 2024
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki Mitsugi, Takashi Shigemasa
  • Publication number: 20240128764
    Abstract: A power supply system for an independent system includes a plurality of power supply devices, a plurality of power conversion devices, and a control device, the plurality of power conversion devices are connected in parallel to the independent system, the plurality of power conversion devices are voltage source voltage-controlled, the plurality of power conversion devices convert power supplied from the plurality of power supply devices into alternating current power corresponding to the independent system, the plurality of power conversion devices supply the alternating current power after the conversion to the independent system, the control device controls conversion operations of the power of the plurality of power conversion devices, the control device calculates a plurality of active power command values of the plurality of power conversion devices according to active power required by the independent system, and calculates a plurality of reactive power command values.
    Type: Application
    Filed: February 17, 2022
    Publication date: April 18, 2024
    Applicant: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventor: Yasuaki MITSUGI
  • Publication number: 20240120865
    Abstract: A drive system according to an aspect of the embodiment includes a first phase estimation unit, a second phase estimation unit, a state determination unit, and a drive control unit. The first phase estimation unit generates a first phase obtained by estimating a phase of a rotor on the basis of an initial phase at a startup stage of the synchronous motor. The second phase estimation unit generates a second phase obtained by estimating the phase of the rotating rotor on the basis of the operation state of the synchronous motor. The state determination unit determines the operation state of the synchronous motor. The drive control unit controls the driving of the synchronous motor by using any one of the first phase and the second phase according to the determination result of the operation state of the synchronous motor.
    Type: Application
    Filed: October 29, 2021
    Publication date: April 11, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Takumi ITO
  • Publication number: 20240120769
    Abstract: In the present uninterruptible power supply apparatus, in a switching period in which a bypass power feed mode is switched to an inverter power feed mode, a semiconductor switch is turned on, a first electromagnetic contactor is turned off, a second electromagnetic contactor is turned on and, in this state, an inverter is activated to start a lap power feed mode, and the semiconductor switch is turned off to end the lap power feed mode. Accordingly, the lap power feed mode can be completed in a short time to reduce an increase of a terminal-to-terminal voltage of a capacitor and thereby prevent the terminal-to-terminal voltage of the capacitor from exceeding an upper limit voltage.
    Type: Application
    Filed: January 29, 2021
    Publication date: April 11, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Masamichi KANO, Hidenobu TAJIMA, Yousuke HAYASHI
  • Publication number: 20240120842
    Abstract: A drive equipment includes a transformer, a power converter, and a control system. The transformer is configured with a primary winding and a secondary winding, and a winding of an electric motor is connected to the secondary winding. The power converter causes a current to flow through the primary winding of the transformer. The control system performs constant current control on the power converter during a period of a first stage after startup of the electric motor is instructed, to reduce a variation in a current flowing through the primary winding of the transformer, and controls the power converter through variable voltage variable frequency control of the electric motor in a second stage after the first stage.
    Type: Application
    Filed: June 10, 2021
    Publication date: April 11, 2024
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Mostafa MAMUN, Akihiko KUROIWA