Patents Assigned to Mitsubishi Electric Corporation
  • Patent number: 11990846
    Abstract: A power conversion apparatus includes a converter circuit converting AC voltage output from an AC power supply into DC voltage. The converter circuit includes unit converters. The power conversion apparatus includes a low current-oriented controller the unit converters to cause current corresponding to a single phase to flow through a current detector, and a high current-oriented controller controlling operation of the unit converters based on a result of comparison between a duty command and a carrier signal, where the duty command is generated based on detection values detected by the current detector and a voltage detector. When the detection value detected by the current detector is less than or equal to a first threshold, the low current-oriented controller is activated, and when the detection value detected by the current detector is greater than the first threshold, the high current-oriented controller is activated.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Motoya Suzuki, Satoru Ichiki, Keisuke Uemura, Koichi Arisawa, Kazunori Hatakeyama
  • Patent number: 11990894
    Abstract: A semiconductor device includes a first switch and a first driver. The first switch selects and outputs one of a power supply potential and a generated potential as a first switch output potential based on a synchronization signal from a transmission circuit and a delayed signal delayed from the synchronization signal. The first driver charges a gate of a bipolar transistor element based on the synchronization signal of the transmission circuit and the first switch output potential.
    Type: Grant
    Filed: June 1, 2022
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Fukudome, Kazuya Hokazono, Mitsutaka Hano, Yuki Terado
  • Patent number: 11991731
    Abstract: Provided are: a sending/receiving unit to receive data frames sent from another wireless station and receivable, the receivable data frames including a first data frame that is a relay target; an interference time storage unit to store an interference time that is a time from when the sending/receiving unit starts receiving each of the data frames to when the sending/receiving unit terminates receiving the data frame; a waiting time determination unit to determine a waiting time on a basis of the interference time; a frame generation unit to generate a second data frame by changing a destination of the first data frame to a data aggregation station that aggregates the data frames or to a wireless station that serves as a relay destination; and a transmission control unit to wait for the waiting time and cause the sending/receiving unit to send the second data frame.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keiko Sameshima, Tetsuya Aoyama, Keijiro Take, Yusuke Kinoshita
  • Patent number: 11990833
    Abstract: Provided is a low-cost noise filter having a noise suppression effect that is not reduced even when a resonance frequency changes according to changes in temperature. A noise filter includes: a noise detection unit which detects a common mode noise; a cancellation signal output unit; an injection unit which injects a cancellation signal; and a grounded capacitor. The cancellation signal output unit includes a filter part which generates the cancellation signal from the common mode noise, and an amplification part which amplifies the cancellation signal. A temperature dependence of a product of an inductance value and a capacitance value of a main circuit portion including the noise detection unit, the injection unit, and the grounded capacitor, and a temperature dependence of a product of an inductance value and a capacitance value of the filter part, are equal to each other.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yasuaki Furusho, Ryota Asakura, Ryosuke Kobayashi, Mamoru Kamikura
  • Patent number: 11990447
    Abstract: A first alignment resin (4) is formed in an annular shape on an electrode (3) of an insulating substrate (1). First plate solder (5) having a thickness thinner than that of the first alignment resin (4) is arranged on the electrode (3) on an inner side of the annular shape of the first alignment resin (4). A semiconductor chip (6) is arranged on the first plate solder (5). The first plate solder (5) is made to melt to bond a lower surface of the semiconductor chip (6) to the electrode (3).
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventor: Isao Oshima
  • Patent number: 11990990
    Abstract: A relay device includes a plurality of physical ports (111-1 to 111-N) that receive frames, and a layer-2 protocol processing unit (113) that transfers the frame received by one of the physical ports (111-1 to 111-N) from at least one of the physical ports (111-1 to 111-N). The layer-2 protocol processing unit (113) has a filtering function for blocking frames other than a clock-time synchronization frame during transfer involving a port selected from the plurality of physical ports (111-1 to 111-N) as a port that relays only the clock-time synchronization frame used for synchronizing clock time.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Toshiyuki Nakayasu, Sachiko Taniguchi, Ryusuke Kawate
  • Patent number: 11991206
    Abstract: A combination identification unit (27) identifies combinations of one or more components which constitute a target system and in each of which an intrusion detection system that detects unauthorized access can be installed. A combination reduction unit (28) extracts, from the combinations identified by the combination identification unit, a combination that satisfies an installation condition accepted by an installation condition input unit (22) and can detect unauthorized communications indicated by attack information accepted by an attack information input unit (24) at a rate higher than or equal to a threshold.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takeshi Asai, Kiyoto Kawauchi
  • Patent number: 11990807
    Abstract: In the electric rotating machine, a crank portion that is displaced in a radial direction of an armature iron core is provided in an apex portion of a coil end portion; a first oblique side that slants with respect to an axis-direction endface of the armature iron core connects a first coil conductor portion with the crank portion; a second oblique side that slants with respect to the axis-direction endface of the armature iron core connects a second coil conductor portion with the crank portion; at least one of the first oblique side and the second oblique side has an inflection point, before being connected with the crank portion, that functions as a base point of a bending portion that is bent toward a radially outside of the armature iron core.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hironori Tsuiki, Jumpei Yasutomi
  • Patent number: 11988566
    Abstract: A pulling detection device includes: a base in which, on a foundation portion, a first wall portion, a projection, and a second wall portion are provided; a movable rod including a switch operation body and a pulling rod, the switch operation body having a first wall portion opposed surface, a projection opposed surface, and a second wall portion opposed surface, the pulling rod extending from the second wall portion opposed surface, while movement of the movable rod toward one side is restricted by contact between the first wall portion and the first wall portion opposed surface and movement of the movable rod toward another side is restricted by contact between the projection and the projection opposed surface; an elastic body provided between the second wall portion opposed surface and the second wall portion; a first switch which operates by contact/separation; and a second switch which operates by contact/separation.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Naoya Kadota, Kota Yano, Yoshihiro Morimoto, Daisuke Mizuno, Yasuki Hattori
  • Patent number: 11990878
    Abstract: A differential amplifying unit includes a first input transistor and a second input transistor forming a differential pair, and a first tail current source and a second tail current source. An output stage includes a first output transistor and a second output transistor that can be driven by an output of the differential amplifying unit. A controller performs control such that during startup, a load is driven by the first tail current source and the first output transistor, and such that after startup, the load is driven by the first tail current source, the second tail current source, the first output transistor, and the second output transistor.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Tomokazu Kojima
  • Patent number: 11988688
    Abstract: A voltage dividing device includes: a plurality of resistive voltage dividing boards each being a plate-like board having a front face, the board having a plurality of conductor patterns arranged on the front face, the conductor patterns being connected in series with one another through capacitors and resistors connected in parallel on the front face of the board. The resistive voltage dividing boards are connected in series with one another through connecting members, and adjacent ones of the resistive voltage dividing boards are arranged so that a rear face of one of the adjacent resistive voltage dividing boards and a front face of the other resistive voltage dividing board face each other and that the conductor patterns arranged on the front face of the one resistive voltage dividing board are disposed oppositely from the conductor patterns arranged on the front face of the other resistive voltage dividing board.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuya Yamashita, Fumihito Izawa, Seiiyu Ishimoto, Masato Achihara
  • Patent number: 11987275
    Abstract: A train control system includes: an image information conversion device that is mounted on a train and outputs first image information obtained by adding train information to image information imaged by an imaging device capable of capturing an area in front of the train; and an obstacle detection device that is installed on the ground and includes: an image information storage unit that records the first image information output from the image information conversion device; an image information comparison unit that compares the first image information with second image information recorded in the image information storage unit; and an image information result output unit that outputs a result from the image information comparison unit.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Patent number: 11987233
    Abstract: A route generation device includes: a steering loaded state input unit to which a steering loaded state of a vehicle is inputted; a parking slot position input unit to which a position of a parking slot near the vehicle is inputted; a vehicle position input unit to which a position of the vehicle is inputted; a number-of-times-of-static-steering upper limit calculation unit configured to calculate, on the basis of the steering loaded state, a number-of-times-of-static-steering upper limit value up to which static steering of the vehicle can be performed between the position of the vehicle and the position of the parking slot; and a guidance route generation unit configured to generate a guidance route for guiding the vehicle to the parking slot, on the basis of the position of the vehicle, the position of the parking slot, and the number-of-times-of-static-steering upper limit value.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenta Katsu, Takashi Matsumoto, Takahisa Aoyagi, Masataka Shirozono, Hiroshi Yamada
  • Patent number: 11987170
    Abstract: A gear shift adjusting mechanism includes: an adjustment unit including a first slider; an adjustment target module including a second slider; and a switch unit including a first rotation shaft and a link member supported rotatably with respect to a fixing member about the first rotation shaft. The link member includes a first engaged part that is engaged with a first engaging part of the first slider and a second engaged part that is engaged with a second engaging part of the second slider. The switch unit moves at least one of the first rotation shaft, the first engaging part, or the second engaging part so that at least one of a first distance between the first rotation shaft and the first engaging part or a second distance between the first rotation shaft and the second engaging part is changed.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takeshi Inatani, Muneharu Kuwata
  • Patent number: 11987498
    Abstract: This gas production system includes: a gas production device having a reactor forming a flow path for a treatment target gas, a first electrode and a second electrode to which voltage is applied, and a catalyst layer provided in the flow path and containing a catalyst; voltage generation means for generating voltage to be applied to the first electrode and the second electrode; and gas supply means for supplying the treatment target gas to the gas production device. The voltage generation means has frequency setting means for setting the frequency of the voltage in accordance with the treatment target gas, plasma generated between the first electrode and the second electrode is applied to the catalyst layer, and the treatment target gas is reformed to obtain a product gas.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: May 21, 2024
    Assignees: MITSUBISHI ELECTRIC CORPORATION, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Kyohei Aketagawa, Isamu Hirashiki, Tomohiro Nozaki, Kenta Sakata
  • Patent number: 11988419
    Abstract: A refrigerant circuit includes a compressor, a high-pressure side heat exchanger, a decompressor, and a low-pressure side heat exchanger, which are annularly interconnected by a refrigerant pipe, and is configured to circulate refrigerant. The refrigerant circuit performs an oil recovery operation based on an operation history of the compressor during a normal operation of the refrigerant circuit and an amount of oil in the compressor detected by an oil depletion sensor.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: May 21, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Ishiyama, Yusuke Shimazu
  • Publication number: 20240159474
    Abstract: A heat exchanger includes a plurality of flat heat-transfer tubes and a corrugated fin placed between the plurality of flat heat-transfer tubes. Louvers in fin sections of the corrugated fin are divided into a first louver group formed further upstream in a direction of flow of air than a drain slit in the corrugated fin and a second louver group formed further downstream in the direction of flow of air than the drain slit. Plate portions of the first louver group and plate portions of the second louver group are inclined to a flat-plate portion in the fin sections and inclined in respective directions that are opposite to each other. The drain slit includes a plurality of drain slits formed between the first louver group and the second louver group at an interval in the direction of flow of air.
    Type: Application
    Filed: February 17, 2022
    Publication date: May 16, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoji ONAKA, Rihito ADACHI, Nanami KISHIDA, Taisaku GOMYO, Tetsuji SAIKUSA, Yuki NAKAO, Atsushi KIBE, Hiroyuki MORIMOTO
  • Publication number: 20240157975
    Abstract: An autonomous driving integrated control system includes multiple roadside monitoring devices and an autonomous driving device, wherein the multiple roadside monitoring devices each have a sensor and a transmitter that transmits information of a detected object, and wherein the autonomous driving device has: a receiver unit; a vehicle abnormal state detection unit; an escape route generation unit that generates, per each of the roadside monitoring devices, intersection escape routes for escaping from the intersection; a selection unit that compares the thus-generated intersection escape routes with each other in terms of their collision-avoidance levels, to thereby make selections; a travelable distance calculation unit that calculates an abnormal-time travelable distance; a vehicle control unit that, when an abnormal state of the vehicle is detected, causes the vehicle to travel along a high-level intersection escape route corresponding to the abnormal-time travelable distance; and a vehicle operation unit.
    Type: Application
    Filed: August 28, 2023
    Publication date: May 16, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Michitoshi AZUMA, Kohei MORI, Toru HIGUCHI, Hiroshi YAMADA
  • Publication number: 20240157567
    Abstract: This picking system comprises: a workpiece posture calculator that calculates postures of workpieces from captured image data acquired from an imager, selects a workpiece to be picked, and determines a gripping position and an angle; a robot that grips and takes out the selected workpiece, on the basis of the determination by the workpiece posture calculator; a posture changing device that changes the posture of a grasped member; and a controller that, when the gripping position and the angle that are determined deviate from a gripping position and an angle that are set, causes the posture changing device instead to hold the workpiece gripped by the robot, and rotate the workpiece, and then causes the robot to grip again the workpiece so that the gripping position and the angle match the gripping position and the angle that are set.
    Type: Application
    Filed: March 31, 2022
    Publication date: May 16, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masaya KAWAI, Takehiro MAEDA
  • Publication number: 20240159479
    Abstract: A heat exchanger includes a distributor; a plurality of heat-transfer tubes; and a refrigerant inflow pipe. The plurality of heat-transfer tubes connected to the distributor stick out into an internal space of the distributor such that when the plurality of heat-transfer tubes and a part defined as the internal space are projected on a plane perpendicular to an axial direction of the distributor, the plurality of heat-transfer tubes occupies one-half or greater of the part defined as the internal space. The distributor includes an orifice plate and dividing the internal space. The orifice plate is located above the lowest one of the plurality of heat-transfer tubes in the internal space. The orifice plate has an orifice through which the upper and lower spaces communicate with each other.
    Type: Application
    Filed: April 6, 2021
    Publication date: May 16, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Rihito ADACHI, Yoji ONAKA, Ryota AKAIWA, Yohei KATO, Yuta SATO