Patents by Inventor Akira Satake
Akira Satake 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).
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Patent number: 11959527Abstract: In a vibration isolator of the present invention, an orifice passage (24) configured to allow a main liquid chamber (14) and an auxiliary liquid chamber (15) to communicate with each other, a plurality of first communication holes (42a) configured to allow the main liquid chamber and an accommodation chamber (42) to communicate with each other, and a second communication hole (42b) configured to allow the auxiliary liquid chamber and the accommodation chamber to communicate with each other are formed in a partition member (16), a tubular member (21) that protrudes in an axial direction toward an elastic body is formed on a first wall surface (16b) of the partition member in which the first communication holes are opened and which constitutes part of an inner surface of the main liquid chamber, and the plurality of first communication holes are opened in both of an inner portion (16f) of the first wall surface positioned inside the tubular member and an outer portion (16g) of the first wall surface positionedType: GrantFiled: May 10, 2019Date of Patent: April 16, 2024Assignee: Prospira CorporationInventors: Yuki Satake, Rei Mikoshiba, Akira Ueki, Yasuyuki Nagashima
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Patent number: 11953555Abstract: An abnormality diagnosis device includes: a data acquirer to acquire a current waveform and a driving frequency of an electric motor; a storage which stores a combination of a current value of the current waveform and the driving frequency at an identical time by the data acquirer; a data determiner to determine whether or not a current value of the current waveform and the driving frequency as a diagnosis target at an identical time by the data acquisition match the combination stored in the storage; an analyzer to perform frequency analysis for the current waveform determined to be matched by the data determiner, to extract sideband waves, and calculate a spectrum intensity of the sideband waves; and an abnormality diagnosis processor to make a diagnosis that abnormality has occurred, when the spectrum intensity of the sideband waves is equal to or greater than a threshold.Type: GrantFiled: October 24, 2017Date of Patent: April 9, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Makoto Kanemaru, Takuya Ohkubo, Sota Sano, Akira Satake, Satoru Terashima
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Publication number: 20230402942Abstract: A power conversion device comprises: power conversion circuitry for converting DC power into AC power and supplying it into a load according to a switching state quantity defined by combinations among switching parameters of switching devices; a voltage output calculation device for calculating a voltage output value on the power conversion circuitry, based on the switching state quantity; an integration value calculation device for acquiring a voltage reference integration value and a voltage output integration value by integrating a voltage reference value and the calculated voltage output value; a switching update-determination unit for outputting an update signal of the switching state quantity, based on the voltage reference integration value, its allowance value, and the voltage output integration value; and a switching determination table for determining a switching state quantity of the switching devices, based on the voltage reference integration value, the voltage output integration value and the upType: ApplicationFiled: November 18, 2021Publication date: December 14, 2023Applicants: Mitsubishi Electric Corporation, National University Corporation Nagaoka University of TechnologyInventors: Tenjiro HIWATARI, Sota SANO, Akira SATAKE, Kiyoshi OHISHI, Yuki YOKOKURA, Yuto KOBAYASHI
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Publication number: 20230336090Abstract: A power conversion apparatus includes a rectification unit that rectifies a first alternating-current power supplied from a commercial power supply; a capacitor connected to output terminals of the rectification unit; an inverter that is connected across the capacitor, converts power output from the rectification unit and the capacitor into a second alternating-current power and, outputs the second alternating-current power to a load including a motor; and a control unit that performs operation control on the inverter to cause the second alternating-current power that includes a pulsation based on a pulsation of power that flows into the capacitor from the rectification unit to be output from the inverter to the load, to restrain a current that flows into the capacitor.Type: ApplicationFiled: October 26, 2020Publication date: October 19, 2023Inventors: Takaaki TAKAHARA, Koichi ARISAWA, Keisuke UEMURA, Haruka MATSUO, Koyo MATSUZAKI, Kenji TAKAHASHI, Akira SATAKE, Hajime TOYODA
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Patent number: 11626825Abstract: A rotary machine control device includes a voltage application unit that applies a voltage to a rotary machine with three phases, a current detection unit that outputs current information representing information on a current caused to flow to the rotary machine by application of the voltage, a control unit that outputs a voltage command to apply a voltage between each of pairs of the phases of the rotary machine, and an open phase determination unit that performs open phase determination to determine whether an open phase occurs in the rotary machine, by detecting the values of currents flowing between the respective pairs of the phases by monitoring the voltage command and the current information, and by comparing the sum of the values of the currents flowing between the respective pairs of the phases with a predetermined reference value.Type: GrantFiled: July 25, 2019Date of Patent: April 11, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Akane Hongyo, Akira Satake
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Patent number: 11594993Abstract: A controller includes: a connection switch that switches a connection state of a winding of a synchronous motor during a rotating operation of the synchronous motor; a current detector that detects a rotary machine current flowing in the synchronous motor; a position/speed estimator that estimates a magnetic pole position and speed of a rotor; a voltage applicator that applies a voltage to the synchronous motor; and a control circuitry that generates a voltage command given to the voltage applicator on the basis of the magnetic pole position and the speed, and outputs a switching operation command for switching the connection state to the connection switch. The control circuitry generates the voltage command to bring the rotary machine current close to zero before the connection state of the winding is switched.Type: GrantFiled: July 18, 2018Date of Patent: February 28, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Akane Hongyo, Kenji Takahashi, Kazunori Hatakeyama, Akira Satake
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Patent number: 11581839Abstract: A rotary-machine control device includes: a connection switching device switching a connection state of stator windings of a rotary machine; a current detection unit detecting a rotary machine current flowing in the rotary machine; a voltage application unit applying voltage to the rotary machine; a control unit generating a voltage command provided to the voltage application unit and outputting a switching command to switch the connection state to the connection switching device; and an open-phase determination unit determining presence or absence of disconnection in the rotary machine or presence or absence of disconnection of a power distribution line to the rotary machine. During rotation of the rotary machine, the control unit outputs the switching command and the open-phase determination unit determines presence or absence of disconnection.Type: GrantFiled: January 23, 2019Date of Patent: February 14, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Akane Hongyo, Akira Satake, Kenji Takahashi
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Patent number: 11489478Abstract: This power conversion device includes: a current detection unit for detecting current flowing through a rotary electric machine; a switching pattern determination unit for determining a switching pattern on the basis of the detected current, a current prediction value, a current command value, and a current harmonic command value; and a power conversion unit for outputting AC power to the rotary electric machine in accordance with the switching pattern, wherein the switching pattern determination unit determines the switching pattern so that the current value follows the current command value and the current harmonic becomes equal to or smaller than a limit value.Type: GrantFiled: April 23, 2019Date of Patent: November 1, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Sota Sano, Akira Satake, Shinsaku Kusube
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Publication number: 20220231627Abstract: A rotary machine control device includes a voltage application unit that applies a voltage to a rotary machine with three phases, a current detection unit that outputs current information representing information on a current caused to flow to the rotary machine by application of the voltage, a control unit that outputs a voltage command to apply a voltage between each of pairs of the phases of the rotary machine, and an open phase determination unit that performs open phase determination to determine whether an open phase occurs in the rotary machine, by detecting the values of currents flowing between the respective pairs of the phases by monitoring the voltage command and the current information, and by comparing the sum of the values of the currents flowing between the respective pairs of the phases with a predetermined reference value.Type: ApplicationFiled: July 25, 2019Publication date: July 21, 2022Applicant: Mitsubishi Electric CorporationInventors: Akane HONGYO, Akira SATAKE
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Publication number: 20210391817Abstract: This power conversion device includes: a current detection unit for detecting current flowing through a rotary electric machine; a switching pattern determination unit for determining a switching pattern on the basis of the detected current, a current prediction value, a current command value, and a current harmonic command value; and a power conversion unit for outputting AC power to the rotary electric machine in accordance with the switching pattern, wherein the switching pattern determination unit determines the switching pattern so that the current value follows the current command value and the current harmonic becomes equal to or smaller than a limit value.Type: ApplicationFiled: April 23, 2019Publication date: December 16, 2021Applicant: Mitsubishi Electric CorporationInventors: Sota SANO, Akira SATAKE, Shinsaku KUSUBE
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Patent number: 11177757Abstract: The present invention includes a control amount calculation unit which calculates two or more control amounts each indicating a driving condition of a rotary electric machine on the basis of output current from and a switching state in a power converter; a limitation range-provided command value generation unit which generates limitation range-provided command values relative to command values for the control amounts; and a switching state determination unit which determines a switching state such that each control amount falls within the limitation range of the corresponding limitation range-provided command value. For at least one of the limitation range-provided command values, the limitation range thereof is temporally changed on the basis of the driving condition of the rotary electric machine.Type: GrantFiled: December 7, 2017Date of Patent: November 16, 2021Assignees: MITSUBISHI ELECTRIC CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGYInventors: Sota Sano, Akira Satake, Kiyoshi Ohishi, Yuki Yokokura, Tenjiro Hiwatari
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Publication number: 20210344294Abstract: A rotary-machine control device includes: a connection switching device switching a connection state of stator windings of a rotary machine; a current detection unit detecting a rotary machine current flowing in the rotary machine; a voltage application unit applying voltage to the rotary machine; a control unit generating a voltage command provided to the voltage application unit and outputting a switching command to switch the connection state to the connection switching device; and an open-phase determination unit determining presence or absence of disconnection in the rotary machine or presence or absence of disconnection of a power distribution line to the rotary machine. During rotation of the rotary machine, the control unit outputs the switching command and the open-phase determination unit determines presence or absence of disconnection.Type: ApplicationFiled: January 23, 2019Publication date: November 4, 2021Applicant: Mitsubishi Electric CorporationInventors: Akane HONGYO, Akira SATAKE, Kenji TAKAHASHI
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Publication number: 20210242815Abstract: A controller includes: a connection switch that switches a connection state of a winding of a synchronous motor during a rotating operation of the synchronous motor; a current detector that detects a rotary machine current flowing in the synchronous motor; a position/speed estimator that estimates a magnetic pole position and speed of a rotor; a voltage applicator that applies a voltage to the synchronous motor; and a control circuitry that generates a voltage command given to the voltage applicator on the basis of the magnetic pole position and the speed, and outputs a switching operation command for switching the connection state to the connection switch. The control circuitry generates the voltage command to bring the rotary machine current close to zero before the connection state of the winding is switched.Type: ApplicationFiled: July 18, 2018Publication date: August 5, 2021Applicant: Mitsubishi Electric CorporationInventors: Akane HONGYO, Kenji TAKAHASHI, Kazunori HATAKEYAMA, Akira SATAKE
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Publication number: 20210203261Abstract: The present invention includes a control amount calculation unit which calculates two or more control amounts each indicating a driving condition of a rotary electric machine on the basis of output current from and a switching state in a power converter; a limitation range-provided command value generation unit which generates limitation range-provided command values relative to command values for the control amounts; and a switching state determination unit which determines a switching state such that each control amount falls within the limitation range of the corresponding limitation range-provided command value. For at least one of the limitation range-provided command values, the limitation range thereof is temporally changed on the basis of the driving condition of the rotary electric machine.Type: ApplicationFiled: December 7, 2017Publication date: July 1, 2021Applicants: Mitsubishi Electric Corporation, National University Corporation Nagaoka University of TechnologyInventors: Sota SANO, Akira SATAKE, Kiyoshi OHISHI, Yuki YOKOKURA, Tenjiro HIWATARI
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Publication number: 20200217895Abstract: An abnormality diagnosis device includes: a data acquirer to acquire a current waveform and a driving frequency of an electric motor; a storage which stores a combination of a current value of the current waveform and the driving frequency at an identical time by the data acquirer; a data determiner to determine whether or not a current value of the current waveform and the driving frequency as a diagnosis target at an identical time by the data acquisition match the combination stored in the storage; an analyzer to perform frequency analysis for the current waveform determined to be matched by the data determiner, to extract sideband waves, and calculate a spectrum intensity of the sideband waves; and an abnormality diagnosis processor to make a diagnosis that abnormality has occurred, when the spectrum intensity of the sideband waves is equal to or greater than a threshold.Type: ApplicationFiled: October 24, 2017Publication date: July 9, 2020Applicant: Mitsubishi Electric CorporationInventors: Makoto KANEMARU, Takuya OHKUBO, Sota SANO, Akira SATAKE, Satoru TERASHIMA
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Patent number: 10473367Abstract: A heat pump apparatus, including: a two-cylinder compressor including: an electric motor; two compression units to be driven by the electric motor, the two-cylinder compressor being structured to switch between two operation modes including single operation in which one of the compression units is brought into a non-compression state, and parallel operation in which both the compression units are brought into a compression state; an inverter drive control device supplying drive power to the electric motor of the two-cylinder compressor; an operation mode detecting-determining unit determining a current operation mode based on an electric signal acquired from the inverter drive control device; and a capacity control device determining a rotating frequency of the electric motor so that a temperature of a target object is brought close to a set value, to thereby control the inverter drive control device based on a result of determination of the operation mode detecting-determining unit.Type: GrantFiled: May 21, 2014Date of Patent: November 12, 2019Assignee: Mitsubishi Electric CorporationInventors: Tetsuhide Yokoyama, Yosuke Shinomoto, Shogo Moroe, Akira Satake, Masashi Fujitsuka, Takeshi Mori, Taro Kato, Hideaki Maeyama, Keiko Tada
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Patent number: 10411633Abstract: A control device for an AC rotating machine includes: a current detection unit; a command generation unit for generating a voltage command, using a moment of inertia J; a speed estimation unit for calculating an estimated speed ?0 on the basis of the voltage command and detected current; an output torque computing unit for calculating output torque on the basis of the detected current; and an inertia moment computing unit for calculating the moment of inertia J. The output torque computing unit gives a delay characteristic corresponding to an estimation delay of the estimated speed ?0, to the output torque, and the inertia moment computing unit calculates the moment of inertia J on the basis of the estimated speed ?0 and the output torque having the delay characteristic.Type: GrantFiled: March 27, 2015Date of Patent: September 10, 2019Assignee: Mitsubishi Electric CorporationInventors: Yosuke Hachiya, Masato Ito, Hisanori Yamasaki, Akira Satake
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Patent number: 10236818Abstract: A drive control apparatus for multiple-winding motor includes: a modulation rate phase command generation unit which calculates currents of first and second inverters for driving a multiple-winding three-phase motor and generates a modulation rate command and a phase command for equalizing the currents; a pulse number determination unit which determines the number of pulses per half cycle on the basis of a frequency command; a pattern table for storing switching patterns; and gate signal generators which control the first and second inverters, using an optimal switching pattern based on the number of pulses, wherein the modulation rate phase command generation unit performs control for equalizing currents of the first and second inverters, and the phase or frequency at which the control is performed is changed in accordance with any of the number of pulses, the modulation rate, the frequency command, and the switching pattern.Type: GrantFiled: October 15, 2014Date of Patent: March 19, 2019Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keiko Tada, Yuriko Okamoto, Akira Satake, Hiromitsu Suzuki, Masahiko Tsukakoshi, Ritaka Nakamura, Masashi Nakamura
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Patent number: 10103674Abstract: In a drive control apparatus for a multiple-winding motor including a power converter for driving a winding group per each winding group of a multiple-winding motor having a plurality sets of winding groups, a compensation amount calculator obtains, by using a signal of a first controller controlling a first power converter driving a first winding group among the winding groups, a compensation amount for compensating a signal of an other controller controlling an other power converter other than the first power converter, based on the compensation amount obtained by the compensation amount calculator. A signal of the other controller is compensated to control the other power converter, and the first power converter is controlled without compensating a signal of a first controller.Type: GrantFiled: November 20, 2014Date of Patent: October 16, 2018Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yuriko Okamoto, Akira Satake, Hiromitsu Suzuki, Masahiko Tsukakoshi, Ritaka Nakamura
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Publication number: 20170310264Abstract: In a drive control apparatus for a multiple-winding motor including a power converter for driving a winding group per each winding group of a multiple-winding motor having a plurality sets of winding groups, a compensation amount calculator obtains, by using a signal of a first controller controlling a first power converter driving a first winding group among the winding groups, a compensation amount for compensating a signal of an other controller controlling an other power converter other than the first power converter, based on the compensation amount obtained by the compensation amount calculator. A signal of the other controller is compensated to control the other power converter, and the first power converter is controlled without compensating a signal of a first controller.Type: ApplicationFiled: November 20, 2014Publication date: October 26, 2017Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yuriko OKAMOTO, Akira SATAKE, Hiromitsu SUZUKI, Masahiko TSUKAKOSHI, Ritaka NAKAMURA