Patents Assigned to Mitsubishi Electric Engineering Company Limited
  • Patent number: 11996769
    Abstract: A noise filter includes: a voltage detector which detects a common mode voltage generated by a power converter; a voltage division circuit which outputs a division voltage obtained by dividing the common mode voltage detected by the voltage detector; a plurality of common mode transformers which superimpose injection voltages each having a polarity opposite to a polarity of the common mode voltage onto an output from or an input to the power converter; and an injection waveform generator which generates, on the basis of the division voltage, output voltages to be outputted to primary sides of the plurality of common mode transformers. The injection waveform generator generates the output voltages such that a difference between the common mode voltage and a total injection voltage obtained by summing the injection voltages to be superimposed by the plurality of common mode transformers is equal to or smaller than an allowable value.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: May 28, 2024
    Assignees: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC ENGINEERING COMPANY, LIMITED
    Inventors: Yuki Fujita, Yasuaki Furusho, Hiroyuki Ichinose
  • Publication number: 20230378868
    Abstract: A noise filter includes: a voltage detector that detects a common-mode voltage; a voltage divider circuit that outputs a divided voltage divided from the common-mode voltage; multiple common-mode transformers that are connected separately to respective power lines of multiline systems connected in parallel relation to each other to an input or output of the power converter, and that superimpose a superimposing voltage having an opposite polarity to the common-mode voltage on each of the power lines of multiline systems; and an injection waveform generator that generates at least one output voltage to be outputted to primary sides of the multiple common-mode transformers, on the basis of the divided voltage. The injection waveform generator generates as the output voltage, a voltage with which a difference between the superimposing voltage to be super-imposed on each of the power lines and the common-mode voltage is within an allowable value.
    Type: Application
    Filed: November 11, 2020
    Publication date: November 23, 2023
    Applicants: Mitsubishi Electric Corporation, Mitsubishi Electric Engineering Company, Limited
    Inventors: Yuki FUJITA, Yasuaki FURUSHO, Hiroyuki ICHINOSE
  • Publication number: 20230179176
    Abstract: A noise filter includes: a voltage detector which detects a common mode voltage generated by a power converter; a voltage division circuit which outputs a division voltage obtained by dividing the common mode voltage detected by the voltage detector; a plurality of common mode transformers which superimpose injection voltages each having a polarity opposite to a polarity of the common mode voltage onto an output from or an input to the power converter; and an injection waveform generator which generates, on the basis of the division voltage, output voltages to be outputted to primary sides of the plurality of common mode transformers. The injection waveform generator generates the output voltages such that a difference between the common mode voltage and a total injection voltage obtained by summing the injection voltages to be superimposed by the plurality of common mode transformers is equal to or smaller than an allowable value.
    Type: Application
    Filed: June 4, 2020
    Publication date: June 8, 2023
    Applicants: Mitsubishi Electric Corporation, Mitsubishi Electric Engineering Company, Limited
    Inventors: Yuki FUJITA, Yasuaki FURUSHO, Hiroyuki ICHINOSE
  • Patent number: 11521794
    Abstract: A conductor (31) wound into a multiple-layered helical shape, and an insulating member (32) provided between layers of the conductor are provided.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 6, 2022
    Assignee: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yoshiyuki Akuzawa, Yuki Ito
  • Patent number: 11496052
    Abstract: An insulated power supply circuit includes a power input circuit including a switching control circuit and a switching element connected to a corresponding winding of a transformer, and power output circuits of two systems each including a regulator connected to a corresponding winding. By the control circuit controlling ON/OFF of the switching element in accordance with an output condition change command signal, which is generated based on a load condition at an output destination of each regulator, a voltage corresponding to an estimated value of a preset excitation level is generated, to thereby change the excitation level of the winding. Each regulator receives an output voltage generated in a corresponding winding in response to the change in excitation level.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: November 8, 2022
    Assignee: Mitsubishi Electric Engineering Company, Limited
    Inventor: Takanori Satake
  • Publication number: 20220334024
    Abstract: A vibration detection device includes an A/D conversion unit for receiving a sine wave signal of an AE wave corresponding to vibration generated in a target machine from an AE sensor that detects the AE wave and converting the received sine wave signal into digital data, an extraction unit for extracting, from the digital data, a data point of a local maximum value for each cycle of the sine wave signal, and an output processing unit for outputting the data point extracted by the extraction unit and cycle data including data points with the number of points which can be recognized as a sine wave and including the data point of a local maximum value so that an output unit visibly outputs the data point and the cycle data.
    Type: Application
    Filed: September 10, 2020
    Publication date: October 20, 2022
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventors: Shinji SHINOHARA, Teru HATANO, Hisato FUJIWARA, Shinya ISHIGAMI
  • Publication number: 20220302769
    Abstract: A wireless power transmission device includes a transmission power supply circuit outputting sinusoidal power, and a resonance type transmission antenna transmitting sinusoidal power. A wireless power reception device includes a resonance type reception antenna receiving sinusoidal power, and a reception power supply circuit including a rectifier circuit rectifying and smoothing sinusoidal power, and a waveform control circuit provided between the reception antenna and the rectifier circuit. The waveform control circuit passes sinusoidal power and attenuates harmonic components included in non-sinusoidal power generated by a rectifying operation of the rectifier circuit.
    Type: Application
    Filed: July 27, 2020
    Publication date: September 22, 2022
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventor: Kiyohide SAKAI
  • Patent number: 11406871
    Abstract: An ergometer according to this invention comprises pedals rotated by an exerciser, a motor connected to the pedals, and a control device connected to the motor in order to control an operation of the motor, wherein a control mode of the control device for controlling the motor can be switched between a concentric contraction exercise mode, in which the motor is caused to function as a load while the pedals are rotated by the exerciser, and an eccentric contraction exercise mode, in which the motor rotates the pedals so that the exerciser is forced to resist the rotation of the pedals.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 9, 2022
    Assignee: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yuichi Kimura, Isao Mizukura, Kazunori Nosaka
  • Publication number: 20220202331
    Abstract: Provided is an exercise load control device including: a patient information input unit configured to input patient information which indicates whether a patient using an exercise therapy apparatus is an atrial fibrillation patient; a heart rate information acquisition unit configured to acquire heart rate information which indicates a heart rate of the patient using the exercise therapy apparatus; and a load control unit configured to control a magnitude of a load to be applied by the exercise therapy apparatus to the patient, based on the patient information input by the patient information input unit and the heart rate information acquired by the heart rate information acquisition unit.
    Type: Application
    Filed: May 27, 2019
    Publication date: June 30, 2022
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yuichi KIMURA, Isao MIZUKURA
  • Patent number: 11324404
    Abstract: A kinesitherapy apparatus includes a measuring instrument, a pedaled rotational mechanism, a rotating electrical machine configured to apply an assist load, which is a regenerative load or a power running load, to the pedaled rotational mechanism, and a motion control device. The motion control device performs power running operation of the rotating electrical machine so that a minus assist load is generated in a warm-up period. In a ramp loading period following the warm-up period, the motion control device raises the assist load from the minus assist load, and calculates an anaerobic threshold based on time-series data of oxygen uptake and carbon dioxide emission that are obtained via the measuring instrument.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: May 10, 2022
    Assignee: MITSUBISHI ELECTRIC ENGINEERING COMPANY, LIMITED
    Inventors: Isao Mizukura, Tomohiko Kisaka
  • Publication number: 20220109329
    Abstract: The battery pack includes a housing for storing a battery cell, a power receiving coil that is provided to extend on a plurality of inner faces of the housing, and receives power from the power feeding coil of a power supply device in a non-contact manner by magnetically resonating with a power feeding coil, and a charging circuit stored in the housing and supplying the power received by the power receiving coil to the battery cell.
    Type: Application
    Filed: August 25, 2020
    Publication date: April 7, 2022
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventor: Kiyohide SAKAI
  • Publication number: 20220094234
    Abstract: An AC electric motor drive system includes a power supply transformer connected to an AC power supply and insulating an AC power supply side and a load side; an AC electric motor; a power converter which converts AC voltage outputted from the power supply transformer to output AC voltage, and which outputs the output AC voltage to the AC electric motor; and a capacitive component having one end connected to the load side of the power supply transformer, and another end grounded.
    Type: Application
    Filed: March 24, 2020
    Publication date: March 24, 2022
    Applicants: Mitsubishi Electric Corporation, Mitsubishi Electric Engineering Company Limited
    Inventors: Masayuki OISHI, Kazuyoshi WATABU, Yuki FUJITA, Hiroyuki ICHINOSE
  • Publication number: 20210268335
    Abstract: Provided is an exercise therapy device capable of more appropriately adjusting a load on an exercising person. An exercise therapy device (10) includes torque detection means (13) and control means (12). The torque detection means (13) is configured to detect a torque applied to a rotation portion (11). The control means (12) is configured to execute processing for changing a motion speed of the rotation portion (11) based on a force reference and the detected torque.
    Type: Application
    Filed: August 3, 2018
    Publication date: September 2, 2021
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventor: Isao MIZUKURA
  • Patent number: 11044023
    Abstract: A carrier wave generating unit for generating a carrier wave signal; a modulating unit for generating a modulated wave signal by performing amplitude modulation on the carrier wave signal generated by the carrier wave generating unit with an audio signal; an adding unit for adding the carrier wave signal generated by the carrier wave generating unit and the modulated wave signal generated by the modulating unit to generate a signal; an ultrasonic emitter for emitting the signal generated by the adding unit, and an ultrasonic emitter arranged on the central axis of the ultrasonic emitter and ahead of the emitting surface of the ultrasonic emitter, for emitting the carrier wave signal generated by the carrier wave generating unit in the same direction as the emitting direction of the ultrasonic emitter are included, wherein the phase of the carrier wave signal emitted by the ultrasonic emitter is opposite to that of the carrier wave signal included in the signal emitted by the ultrasonic emitter.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: June 22, 2021
    Assignee: Mitsubishi Electric Engineering Company, Limited
    Inventor: Shunji Yoshida
  • Publication number: 20210128983
    Abstract: An ergometer according to this invention comprises pedals rotated by an exerciser, a motor connected to the pedals, and a control device connected to the motor in order to control an operation of the motor, wherein a control mode of the control device for controlling the motor can be switched between a concentric contraction exercise mode, in which the motor is caused to function as a load while the pedals are rotated by the exerciser, and an eccentric contraction exercise mode, in which the motor rotates the pedals so that the exerciser is forced to resist the rotation of the pedals.
    Type: Application
    Filed: April 26, 2017
    Publication date: May 6, 2021
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yuichi KIMURA, Isao MIZUKURA, Kazunori NOSAKA
  • Patent number: 10910885
    Abstract: There are included: a switching parameter detecting unit (21) that detects a switching voltage of a switching element (Q1); and an abnormality detecting unit (a first comparing unit (264a) and an abnormality determining unit (265)) that detects an abnormality caused by foreign matter, on the basis of a result of the detection by the switching parameter detecting unit (21).
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: February 2, 2021
    Assignee: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yoshiyuki Akuzawa, Hirokazu Suzuki
  • Publication number: 20210021196
    Abstract: An insulated power supply circuit includes a power input circuit including a switching control circuit and a switching element connected to a corresponding winding of a transformer, and power output circuits of two systems each including a regulator connected to a corresponding winding. By the control circuit controlling ON/OFF of the switching element in accordance with an output condition change command signal, which is generated based on a load condition at an output destination of each regulator, a voltage corresponding to an estimated value of a preset excitation level is generated, to thereby change the excitation level of the winding. Each regulator receives an output voltage generated in a corresponding winding in response to the change in excitation level.
    Type: Application
    Filed: April 19, 2018
    Publication date: January 21, 2021
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventor: Takanori SATAKE
  • Publication number: 20200195052
    Abstract: Disclosed is a resonance-type power reception device including a DC-DC converter (7) having an input terminal connected to a line (10), a switching circuit (5) for connecting or disconnecting a line (9) to which power is inputted to or from the line (10), and a switch control unit (6) for causing the switching circuit (5) to connect the line (9) to the line (10) after a voltage (V1) exceeds a threshold voltage (Vin(th)).
    Type: Application
    Filed: April 24, 2017
    Publication date: June 18, 2020
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yoshiyuki AKUZAWA, Yuki ITO
  • Publication number: 20190393966
    Abstract: There are included a carrier wave generating unit (4) that generates a carrier wave signal; a modulating unit (6) that generates a modulated wave signal obtained by amplitude-modulating the carrier wave signal generated by the carrier wave generating unit (4) using an audio signal; an absolute value converting unit (7) that converts the audio signal into an absolute value; an exponentially weighted moving average unit (8) that performs an exponentially weighted moving average process on the audio signal converted by the absolute value converting unit (7), using an audio signal obtained one sampling period ago, to estimate a sound pressure level of the audio signal; and a multiplying unit (10) that multiplies the carrier wave signal generated by the carrier wave generating unit (4) by the sound pressure level estimated by the exponentially weighted moving average unit (8).
    Type: Application
    Filed: February 1, 2017
    Publication date: December 26, 2019
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventor: Shunji YOSHIDA
  • Publication number: 20190371521
    Abstract: A conductor (31) wound into a multiple-layered helical shape, and an insulating member (32) provided between layers of the conductor are provided.
    Type: Application
    Filed: March 10, 2017
    Publication date: December 5, 2019
    Applicant: Mitsubishi Electric Engineering Company, Limited
    Inventors: Yoshiyuki AKUZAWA, Yuki ITO