Patents by Inventor Masaya TATEDA

Masaya TATEDA 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: 20210044241
    Abstract: A motor driving device includes an acquisition unit configured to acquire multiple pieces of data in data acquisition periods having different lengths; a selection unit configured to select a piece of data from among the multiple pieces of data, based on timing at which a switching circuit switches switching devices; and a control unit configured to control the switching circuit based on the selected data.
    Type: Application
    Filed: July 31, 2020
    Publication date: February 11, 2021
    Inventors: Masaya Tateda, Yasuyuki Matsumoto
  • Publication number: 20200392963
    Abstract: A fan motor drive device is connected to a fan motor so as to drive the fan motor. The fan motor drive device includes an operation control part configured to control operation of the fan motor and a determination part configured to determine the quality of the fan motor on the basis of an identification signal, which indicates an operation state of the fan motor and is output on the basis of a predetermined operation controlled by the operation control part.
    Type: Application
    Filed: June 4, 2020
    Publication date: December 17, 2020
    Applicant: FANUC CORPORATION
    Inventors: Masaya TATEDA, Kenichi OKUAKI
  • Publication number: 20200227206
    Abstract: A resin molded substrate has at least a pair of terminal through holes for allowing lead terminals of a cylindrical capacitor to be inserted through, and at least one protrusion for supporting a side of a bottom portion of the capacitor so as to space from a front surface of the substrate the side of the bottom portion of the capacitor having the lead terminals inserted through the terminal through holes. The pair of lead terminals at the bottom portion are inserted through the terminal through holes of the resin molded substrate, whereby the capacitor is mounted in an upright state with a solder, so that the protrusion spaces the side of the bottom portion from the front surface of the resin molded substrate.
    Type: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Applicant: FANUC CORPORATION
    Inventors: Yuuki INOUE, Masaya TATEDA
  • Publication number: 20200112273
    Abstract: A motor drive device includes a converter, an inverter, a DC link capacitor, a dynamic braking circuit, current detectors, and an abnormality detector. The dynamic braking circuit includes a resistor and a switch provided between terminals of the motor, and performs braking of the motor by establishing the switch in an open state to disconnect between the terminals of the motor when driving the motor, and short-circuiting the terminals of the motor via the resistor with the switch in a closed state when stopping the motor. The current detectors detect the drive current of the motor. The abnormality detector detects, when driving the motor, abnormality of the dynamic braking circuit on the basis of the slope of the rise or fall of the drive current of the motor detected by the current detectors.
    Type: Application
    Filed: August 29, 2019
    Publication date: April 9, 2020
    Applicant: FANUC CORPORATION
    Inventors: Masaya TATEDA, Yasuyuki MATSUMOTO
  • Patent number: 10587213
    Abstract: A motor drive apparatus includes a converter configured to convert AC power inputted by an AC power supply to DC power and to output the same to a DC link, a DC link capacitor provided for the DC link, an inverter configured to convert the DC power in the DC link to AC power for driving a motor and to output the AC power, a DC voltage detection unit configured to detect a value of DC voltage applied across the DC link capacitor, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, and a leakage current detection unit configured to detect a leakage current caused by driving the motor, based on the value of DC voltage detected by the DC voltage detection unit and the peak value of AC voltage detected by the AC voltage detection unit.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: March 10, 2020
    Assignee: FANUC CORPORATION
    Inventors: Masaya Tateda, Yasuyuki Matsumoto
  • Patent number: 10554165
    Abstract: A motor drive apparatus includes a converter configured to convert AC power of an AC power supply into DC power and outputs the DC power, a DC link unit including capacitors connected in series with each other, an inverter connected in parallel with the DC link unit, and configured to convert the DC power of the DC link unit into AC power for driving a motor, and outputs the AC power, and a short-circuit judgment unit configured to judge that at least one of the capacitors in the DC link unit has shorted in the case where, when the value of a voltage applied to a positive and negative bipolar terminal of the DC link unit is smaller than a first threshold, the value of an input current flowing from the AC power supply into the DC link unit via the converter is larger than a second threshold.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: February 4, 2020
    Assignee: FANUC CORPORATION
    Inventors: Yuuta Gotou, Yasuyuki Matsumoto, Masaya Tateda
  • Publication number: 20190363600
    Abstract: A motor driving device includes N units (N is a natural number equal to or greater than 2) of inverters configured to control N units of motors, respectively, a×N units (a is a natural number) of cables configured to allow connection between the N units of inverters and the N units of motors, respectively, and a PWM signal output unit configured to transmit a PWM signal to the N units of inverters. The N units of inverters and the a×N units of cables are divided into M groups (M?N). The PWM signal output unit outputs the PWM signal for driving at least one inverter belonging to each group of the M groups so that the PWM signals have phase differences shifted by 360 degrees/M among the groups.
    Type: Application
    Filed: May 3, 2019
    Publication date: November 28, 2019
    Applicant: FANUC CORPORATION
    Inventors: Yasuyuki MATSUMOTO, Masaya TATEDA, Keitarou INAGAKI
  • Patent number: 10425031
    Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: September 24, 2019
    Assignee: FANUC CORPORATION
    Inventors: Hiroyasu Satou, Masaya Tateda, Youichirou Ooi, Akira Hirai, Kiichi Inaba
  • Patent number: 10401415
    Abstract: A motor drive apparatus includes a converter, a DC link capacitor, a plurality of inverters, a diagnosis command unit configured to give a command to one of the plurality of inverters to perform power conversion, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, a DC voltage detection unit configured to detect a value of DC voltage across the DC link capacitor, a calculation unit to calculate a difference between the value of DC voltage and the peak value of AC voltage, a storage unit configured to store the difference in association with the inverters, and a leakage current determination unit configured to determine that the inverter associated with the largest of the differences stored in the storage unit is the inverter that has caused the largest leakage current.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: September 3, 2019
    Assignee: FANUC CORPORATION
    Inventors: Masaya Tateda, Yasuyuki Matsumoto
  • Publication number: 20190244779
    Abstract: There are provided a driving control portion configured to output a closing command for bringing a contact to a closed state to a first driving portion, and also to output to the first driving portion an opening command for bringing the contact to an open state and the closing command in an alternate and repeated manner until the current runs through the contact; a number-of-retries obtaining portion configured to obtain, as a number of retries, the number of times that the driving control portion repeated the opening command and the closing command until the current runs through the contact after the driving control portion outputted the closing command to the first driving portion; and a usable period estimating portion configured to estimate a usable period from the present time of a first relay in accordance with the number of retries.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Applicant: FANUC CORPORATION
    Inventors: Hirokazu Nagai, Masaya Tateda, Yasuyuki Matsumoto
  • Publication number: 20190245474
    Abstract: A motor drive apparatus includes a converter configured to convert AC power of an AC power supply into DC power and outputs the DC power, a DC link unit including capacitors connected in series with each other, an inverter connected in parallel with the DC link unit, and configured to convert the DC power of the DC link unit into AC power for driving a motor, and outputs the AC power, and a short-circuit judgment unit configured to judge that at least one of the capacitors in the DC link unit has shorted in the case where, when the value of a voltage applied to a positive and negative bipolar terminal of the DC link unit is smaller than a first threshold, the value of an input current flowing from the AC power supply into the DC link unit via the converter is larger than a second threshold.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Inventors: Yuuta GOTOU, Yasuyuki MATSUMOTO, Masaya TATEDA
  • Publication number: 20190157002
    Abstract: A resin molded substrate has at least a pair of terminal through holes for allowing lead terminals of a cylindrical capacitor to be inserted through, and at least one protrusion for supporting a side of a bottom portion of the capacitor so as to space from a front surface of the substrate the side of the bottom portion of the capacitor having the lead terminals inserted through the terminal through holes. The pair of lead terminals at the bottom portion are inserted through the terminal through holes of the resin molded substrate, whereby the capacitor is mounted in an upright state with a solder, so that the protrusion spaces the side of the bottom portion from the front surface of the resin molded substrate.
    Type: Application
    Filed: September 20, 2018
    Publication date: May 23, 2019
    Applicant: FANUC CORPORATION
    Inventors: Yuuki INOUE, Masaya TATEDA
  • Publication number: 20180351494
    Abstract: A motor drive apparatus includes a converter configured to convert AC power inputted by an AC power supply to DC power and to output the same to a DC link, a DC link capacitor provided for the DC link, an inverter configured to convert the DC power in the DC link to AC power for driving a motor and to output the AC power, a DC voltage detection unit configured to detect a value of DC voltage applied across the DC link capacitor, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, and a leakage current detection unit configured to detect a leakage current caused by driving the motor, based on the value of DC voltage detected by the DC voltage detection unit and the peak value of AC voltage detected by the AC voltage detection unit.
    Type: Application
    Filed: May 17, 2018
    Publication date: December 6, 2018
    Applicant: FANUC CORPORATION
    Inventors: Masaya Tateda, Yasuyuki Matsumoto
  • Publication number: 20180348284
    Abstract: A motor drive apparatus includes a converter, a DC link capacitor, a plurality of inverters, a diagnosis command unit configured to give a command to one of the plurality of inverters to perform power conversion, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, a DC voltage detection unit configured to detect a value of DC voltage across the DC link capacitor, a calculation unit to calculate a difference between the value of DC voltage and the peak value of AC voltage, a storage unit configured to store the difference in association with the inverters, and a leakage current determination unit configured to determine that the inverter associated with the largest of the differences stored in the storage unit is the inverter that has caused the largest leakage current.
    Type: Application
    Filed: May 17, 2018
    Publication date: December 6, 2018
    Applicant: FANUC CORPORATION
    Inventors: Masaya Tateda, Yasuyuki Matsumoto
  • Patent number: 10090795
    Abstract: A motor drive according to the present invention includes an inverter, a motor rotational speed obtaining unit, a motor inertia information storage unit, a motor rotational energy calculator, a dynamic braking circuit, a tolerance information storage unit for storing the tolerances of resistors of the dynamic braking circuit, a power element operation unit, a dynamic braking circuit operation unit, and a tolerance comparator for performing a comparison between the rotational energy of a motor and the tolerance of the dynamic braking circuit. When the rotational energy exceeds the tolerance, power elements of one of arms are turned on, while power elements of the other arm are turned off, without actuating the dynamic braking circuit. When the rotational energy is equal to or less than the tolerance, the dynamic braking circuit is actuated, and the power elements of the one of the arms are turned off.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: October 2, 2018
    Assignee: FANUC CORPORATION
    Inventor: Masaya Tateda
  • Patent number: 10050357
    Abstract: A connection member includes: a first short bar whose one end is attached to a first terminal block; a second short bar which extends in a longitudinal direction of the first short bar and whose one end is attached to a second terminal block, at least part of the other end of the second short bar overlapping the first short bar; and a guide member which is attached to an overlapping part of the first short bar and the second short bar and which allows the second short bar to move relative to the first short bar in the longitudinal direction while maintaining surface contact between the first short bar and the second short bar at the overlapping part.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: August 14, 2018
    Assignee: FANUC CORPORATION
    Inventors: Masaya Tateda, Yuuta Satou, Kaname Matsumoto
  • Publication number: 20180138608
    Abstract: A connection member includes: a first short bar whose one end is attached to a first terminal block; a second short bar which extends in a longitudinal direction of the first short bar and whose one end is attached to a second terminal block, at least part of the other end of the second short bar overlapping the first short bar; and a guide member which is attached to an overlapping part of the first short bar and the second short bar and which allows the second short bar to move relative to the first short bar in the longitudinal direction while maintaining surface contact between the first short bar and the second short bar at the overlapping part.
    Type: Application
    Filed: November 8, 2017
    Publication date: May 17, 2018
    Applicant: FANUC CORPORATION
    Inventors: Masaya TATEDA, Yuuta SATOU, Kaname MATSUMOTO
  • Publication number: 20180091083
    Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Applicant: FANUC CORPORATION
    Inventors: Hiroyasu Satou, Masaya Tateda, Youichirou Ooi, Akira Hirai, Kiichi Inaba
  • Patent number: 9899954
    Abstract: A motor drive apparatus according to the present invention comprises: an electric shunt which shunts a current flowing through a power line connected to a motor; a first current detection unit and a second detection unit, each disposed on either side of a node shunted by the electric shunt, for detecting the current flowing through the power line; a shunt commanding unit which gives a shunt command to the electric shunt to effect shunting of the current; and a determining unit which determines the presence or absence of a fault in the electric shunt, based on the shunt command and on current values detected by the first current detection unit and the second detection unit.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: February 20, 2018
    Assignee: FANUC CORPORATION
    Inventors: Masaya Tateda, Youichirou Ooi, Akira Hirai, Kiichi Inaba
  • Patent number: 9846190
    Abstract: A motor drive device includes a power source unit rectifying AC voltage to DC voltage and to smooth the DC voltage by a capacitor, a motor drive amplification, a power source voltage measurement unit, an insulation resistance deterioration detection unit having a contact unit connecting one end of the capacitor to the ground and a current detection unit provided between the other end of the capacitor and a motor coil, and detecting a deterioration in an insulation resistance of the motor based on a detected signal obtained from a closed circuit formed by the contact unit, the capacitor, the motor coil, and the ground by using the current detection unit, and a failure detection unit detecting a failure in the insulation resistance deterioration detection unit based on the detected signal in the insulation resistance deterioration detection unit and a voltage value measured by the power source voltage measurement unit.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: December 19, 2017
    Assignee: FANUC CORPORATION
    Inventors: Masaya Tateda, Hiroyasu Sato, Akira Hirai