Patents by Inventor Katsuhiko Saito

Katsuhiko Saito has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200240695
    Abstract: An ice making device includes an ice tray, an ice separating mechanism which is a mechanism structured to take out ice pieces from the ice tray, a drive part structured to drive the ice separating mechanism, and a frame which supports the ice tray and the drive part. The frame is provided with a water passage part which guides water supplied from an outside to the ice tray, and the frame is attached with a water supply adaptor which is a water passage member separately provided from the water passage part for supplying the water to the water passage part.
    Type: Application
    Filed: January 20, 2020
    Publication date: July 30, 2020
    Applicant: NIDEC SANKYO CORPORATION
    Inventors: Shunji SAITO, Takaji HARATA, Katsuhiko HAYASHI
  • Publication number: 20200103156
    Abstract: To provide an ice maker capable of suppressing damage to a frame. In an ice maker, an ice making tray, and a driving unit structured to cause the ice making tray to perform a flip operation and a twist operation are supported by a frame. With the frame, in an inner wall of a first side plate unit, there are provided a first inner wall portion extending in a first direction along the driving unit, and a second inner wall portion extending in the first direction along the ice making tray on the other side in a second direction with respect to the first inner wall portion, and in a step unit connecting the first inner wall portion and the second inner wall portion, there is provided a cutout serving as a through unit for passing a wire connected to the driving unit.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 2, 2020
    Applicant: NIDEC SANKYO CORPORATION
    Inventors: Shunji SAITO, Katsuhiko HAYASHI
  • Patent number: 10530288
    Abstract: A motor drive apparatus which drives a motor includes inverter modules equal in number to phases of the motor. Each of the inverter modules includes a plurality of switching element pairs. Each of the switching element pairs is defined by two switching elements connected in series. In each of the inverter modules, the plurality of switching element pairs are connected in parallel, and each of resistance values of gate resistors connected to the switching elements is set for the corresponding switching element connected thereto.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: January 7, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Yosuke Shinomoto, Katsuhiko Saito, Norikazu Ito
  • Publication number: 20200003470
    Abstract: An ice making machine is provided and includes: an ice tray, having a water storage recessed part; a drive part for reversing the ice tray around an axial line passing the ice tray between a water storage position and an ice separation position; and a frame, supporting the ice tray and the drive part. The ice tray includes a water receiving part protruded to an outer side in a portion which is moved to a lower side when the ice tray starts to turn to a CCW direction directing from the water storage position to the ice separation position. The frame includes a projected portion located on an upper side with respect to the water receiving part. The projected portion includes a water passage port for passing the water at a position overlapping with the water receiving part when being viewed in a Z-direction.
    Type: Application
    Filed: September 25, 2018
    Publication date: January 2, 2020
    Applicant: NIDEC SANKYO CORPORATION
    Inventors: Akio Ishimizu, Shunji SAITO, Katsuhiko HAYASHI
  • Patent number: 10500863
    Abstract: An inkjet head maintenance mechanism includes: an inkjet head including a nozzle plate with ejection ports arranged in the nozzle plate and configured to eject droplets of ink, and a protection plate stacked on the nozzle plate and having an opening formed at a position corresponding to the ejection ports and exposing the ejection ports to an outside; a cap configured to come into contact with the protection plate and surround the opening of the protection plate; and a controller configured to detect an on-off state of a power supply of an inkjet printer to which the inkjet head is attached and adjust a contact pressure of the cap onto the protection plate depending on the detected on-off state of the power supply.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: December 10, 2019
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Katsuhiko Matsunaga, Mamoru Saito
  • Publication number: 20190341336
    Abstract: A power module apparatus (10) comprises: a power module (100A) comprising a package (110) configured to seal a perimeter of a semiconductor device, and a heat radiator (42) bonded to one surface of the package; a cooling device (30) comprising a coolant passage (33) through which coolant water flows, in which the heat radiator is attached to an opening (35) provided on a way of the coolant passage, wherein the heat radiator (42) of the power module (100A) is attached to the opening (35) of the cooling device (30) so that a height (ha) and a height (hb) are substantially identical to each other. The power module in which the heat radiator is attached to the opening formed at the upper surface portion of the cooling device can also be efficiently cooled, and thereby it becomes possible to reduce degradation due to overheating.
    Type: Application
    Filed: July 15, 2019
    Publication date: November 7, 2019
    Inventors: Katsuhiko YOSHIHARA, Masao SAITO
  • Patent number: 10432131
    Abstract: There are provided the same number of inverter modules as the number of phases of a motor, and an inverter control unit that generates PWM signals used to drive the inverter modules in PWM. Three phase outputs from each of the inverter modules are coupled to form a phase output signal for one phase of the motor while capacitors are mounted between control GNDs of the inverter modules and power GNDs of the inverter modules. Consequently, even if a surge voltage is generated in a GND wiring at the time of a switching operation of switching elements in the inverter modules, the application of the surge voltage to the switching elements can be suppressed.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: October 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Norikazu Ito, Katsuhiko Saito, Shigeo Umehara, Katsuyuki Amano, Masahiro Fukuda
  • Publication number: 20190280637
    Abstract: A motor drive apparatus includes: inverter modules equivalent in number to phases of a motor; and a control unit that generates a PWM signal for driving the inverter modules by using PWM. Each of the inverter modules includes: a plurality of pairs of switching elements, each pair of switching elements including two switching elements connected in series; a drive circuit; and a protection circuit. The plurality of pairs of switching elements is connected in parallel, and power GNDs that are reference terminals of the plurality of pairs of switching elements, a control GND that is a reference terminal of the drive circuit, and a terminal for overcurrent fault input in the protection circuit are independently exposed to the outside. The power GNDs and the control GND are connected to a single point on a printed circuit board by a wiring pattern.
    Type: Application
    Filed: April 27, 2016
    Publication date: September 12, 2019
    Inventors: Norikazu ITO, Shigeo UMEHARA, Katsuhiko SAITO, Katsuyuki AMANO, Masahiro FUKUDA
  • Patent number: 10403561
    Abstract: A power module apparatus (10) comprises: a power module (100A) comprising a package (110) configured to seal a perimeter of a semiconductor device, and a heat radiator (42) bonded to one surface of the package; a cooling device (30) comprising a coolant passage (33) through which coolant water flows, in which the heat radiator is attached to an opening (35) provided on a way of the coolant passage, wherein the heat radiator (42) of the power module (100A) is attached to the opening (35) of the cooling device (30) so that a height (ha) and a height (hb) are substantially identical to each other. The power module in which the heat radiator is attached to the opening formed at the upper surface portion of the cooling device can also be efficiently cooled, and thereby it becomes possible to reduce degradation due to overheating.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: September 3, 2019
    Assignee: ROHM CO., LTD.
    Inventors: Katsuhiko Yoshihara, Masao Saito
  • Publication number: 20190264573
    Abstract: An acquisition unit is configured to acquire measurement values of a target device. The measurement values that are acquired include at least a temperature and a flow rate of an input fluid to be input to the target device, and a temperature and a flow rate of an output fluid to be output from the target device. A correction unit is configured to obtain a correction measurement value by which the measurement values are corrected through thermal equilibrium calculations based on the measurement values. A distance calculation unit is configured to calculate a Mahalanobis distance with a factor of the correction measurement value.
    Type: Application
    Filed: May 31, 2017
    Publication date: August 29, 2019
    Inventors: Ichiro NAGANO, Kuniaki AOYAMA, Mayumi SAITO, Shintaro KUMANO, Katsuhiko ABE, Toru TANAKA, Takahiro YAMAUCHI
  • Patent number: 10381244
    Abstract: The power module includes: a first metallic circuit pattern, a semiconductor device disposed on the first metallic circuit pattern; a leadframe electrically connected to the semiconductor device; and a stress buffering layer disposed on an upper surface of the semiconductor device, and capable of buffering a CTE difference between the semiconductor device and the leadframe. The leadframe is connected to the semiconductor device via the stress buffering layer, a CTE of the stress buffering layer is equal to or less than a CTE of the leadframe, and a cross-sectional shape of the stress buffering layer is L-shape. There is provided: the power module capable of realizing miniaturization and large current capacity, and reducing cost thereof by using leadframe structure, and capable of reducing a variation in welding and improving a yield without damaging a semiconductor device; and a fabrication method for such a power module.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: August 13, 2019
    Assignee: ROHM CO., LTD.
    Inventors: Katsuhiko Yoshihara, Masao Saito
  • Publication number: 20190187676
    Abstract: An acquisition unit is configured to acquire measurement values of a target device. A likelihood calculation unit is configured to calculate an occurrence likelihood for each of a plurality of phenomena that are liable to occur to the target device based on the measurement values acquired by the acquisition unit. A table storage unit is configured to store a table in which the plurality of phenomena and occurrence causes of abnormalities of the target device are associated to each other. As estimation unit is configured to estimate the occurrence causes based on the occurrence likelihood and the table.
    Type: Application
    Filed: May 31, 2017
    Publication date: June 20, 2019
    Inventors: Ichiro NAGANO, Kuniaki AOYAMA, Mayumi SAITO, Shintaro KUMANO, Katsuhiko ABE, Toru TANAKA, Takahiro YAMAUCHI
  • Patent number: 10326333
    Abstract: A geared motor may include a first case member, a support member disposed on one side in a motor axial line direction with respect to the first case member and connected with the first case member, a stator in a tube shape disposed between the first case member and the support member, a rotor disposed on an inner side with respect to the stator, a rotor support shaft rotatably supporting the rotor, and a gear train structured to transmit rotation of the rotor. The first case member may be provided with a radial direction positioning part which positions the stator in a radial direction and a first support part for the rotor support shaft which supports an end part on the other side in the motor axial line direction of the rotor support shaft.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: June 18, 2019
    Assignee: NIDEC SANKYO CORPORATION
    Inventors: Shunji Saito, Manabu Sakamoto, Katsuhiko Hayashi
  • Publication number: 20190097563
    Abstract: A motor drive apparatus which drives a motor includes inverter modules equal in number to phases of the motor. Each of the inverter modules includes a plurality of switching element pairs. Each of the switching element pairs is defined by two switching elements connected in series. In each of the inverter modules, the plurality of switching element pairs are connected in parallel, and each of resistance values of gate resistors connected to the switching elements is set for the corresponding switching element connected thereto.
    Type: Application
    Filed: September 4, 2015
    Publication date: March 28, 2019
    Inventors: Takuya SHIMOMUGI, Yosuke SHINOMOTO, Katsuhiko SAITO, Norikazu ITO
  • Patent number: 10208992
    Abstract: A cooling-abnormality detecting system in which a heat generating component and a cooling component contact each other via a contact section, and the cooling component cools the heat generating component. The cooling-abnormality detecting system includes: a heat-generating-component-temperature detecting sensor, a heat-generating-component-power-consumption detecting sensor, a cooling-component-temperature detecting sensor, and a processor that calculates a heat resistance value of the contact section between the heat generating component and the cooling component and determines the presence or absence of an abnormality in the contact section.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: February 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryuji Momose, Katsuhiko Saito
  • Publication number: 20190044469
    Abstract: There are provided the same number of inverter modules as the number of phases of a motor, and an inverter control unit that generates PWM signals used to drive the inverter modules in PWM. Three phase outputs from each of the inverter modules are coupled to form a phase output signal for one phase of the motor while capacitors are mounted between control GNDs of the inverter modules and power GNDs of the inverter modules. Consequently, even if a surge voltage is generated in a GND wiring at the time of a switching operation of switching elements in the inverter modules, the application of the surge voltage to the switching elements can be suppressed.
    Type: Application
    Filed: April 27, 2016
    Publication date: February 7, 2019
    Inventors: Norikazu ITO, Katsuhiko SAITO, Shigeo UMEHARA, Katsuyuki AMANO, Masahiro FUKUDA
  • Publication number: 20160091234
    Abstract: A cooling-abnormality detecting system includes: a heat generating component; a heat-generating-component-temperature detecting unit, which is heat-generating-component-temperature detecting apparatus; a heat-generating-component-power-consumption detecting unit, which is heat-generating-component-power-consumption detecting apparatus; a cooling component that comes into contact with the heat generating component via a contact section and performs heat radiation from the heat generating component; a cooling-component-temperature detecting unit, which is cooling-component-temperature detecting apparatus; and a heat-resistance calculating unit, which is heat-resistance calculating apparatus for calculating a heat resistance value ?HC of the contact section between the heat generating component and the cooling component.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 31, 2016
    Inventors: Ryuji MOMOSE, Katsuhiko SAITO
  • Patent number: 9136757
    Abstract: A power converter includes step-up means for varying a voltage applied by a power supply to a predetermined voltage, commutating means for performing a commutation operation for allowing a current flowing through the step-up means to flow through a second path, smoothing means for smoothing a voltage related to outputs of the step-up means and the commutating means to produce power and supplying the power to a load side, and control means for performing control related to voltage varying, such as stepping up, by the step-up means and controlling the commutation operation of the commutating means on the basis of at least one of a voltage and a current related to the step-up means.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: September 15, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Arisawa, Takuya Shimomugi, Yosuke Shinomoto, Masato Handa, Mitsuo Kashima, Shigeo Umehara, Katsuhiko Saito, Norikazu Ito, Hitoshi Tanifuji, Makoto Tanikawa, Tomomi Higashikawa
  • Patent number: 8941347
    Abstract: A converter control device comprises: a voltage-zero-cross detection unit detecting zero cross of the alternate-current voltage and outputting a voltage zero-cross signal; a power-source-current detection unit detecting a power source current of the alternate-current power source; a bus-line-voltage detection unit detecting a bus-line voltage between terminals of the smoothing capacitor; a PWM-signal generation unit generating a PWM-signal for on/off-controlling the switching unit, based on the power-source current, the bus-line voltage and a bus-line-voltage command value as a target voltage of the bus-line voltage; a power-source voltage-state detection unit detecting a signal state of the alternate-current voltage based on the voltage zero-cross signal; and a fundamental-switching-frequency selection unit selecting a fundamental switching frequency of the PWM-signal based on the signal state of the alternate-current voltage.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: January 27, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yu Otorii, Katsuhiko Saito, Masahiro Fukuda
  • Patent number: 8937821
    Abstract: A DC power supply apparatus comprising: a rectifying circuit including, a first rectifying portion, a second rectifying portion, a third rectifying portion and a fourth rectifying portion; a current detection portion; a first switching portion; and a second switching portion; wherein each of the first rectifying portion cooperatively operating with the first switching portion and the second rectifying portion cooperatively operating with the second switching portion is a semiconductor element which is formed by using a Schottky junction formed between silicon carbide or gallium nitride and metal and has a withstanding voltage property with respect to a voltage of an AC power supply.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: January 20, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Katsuyuki Amano, Daisuke Suzuki, Katsuhiko Saito