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公开(公告)号：US12143038B2
公开(公告)日：2024-11-12
申请号：US18073190
申请日：2022-12-01
Inventor： Tetsuya Matsuyama , Yuya Tanaka
Abstract: A rotary machine control device includes: a magnetization characteristics determiner that determines a magnet phase of a magnet flux based on an estimated magnetic flux and a detection current, and determines a qm-axis magnetic flux of the estimated magnetic flux, a qm-axis current of the detection current, and a harmonic component of a magnet phase using a dm-qm coordinate system with a dm axis representing the magnet phase and a qm axis representing a phase shifted by 90 degrees from the magnet phase; a ripple compensation determiner that determines a ripple compensation phase using a ripple compensation torque obtained based on the qm-axis current and the harmonic component; a command phase determiner that determines a command phase based on the ripple compensation phase and a torque command; and a command magnetic flux generator that generates a command magnetic flux based on a command amplitude and the command phase.
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公开(公告)号：US09964000B2
公开(公告)日：2018-05-08
申请号：US14675874
申请日：2015-04-01
Inventor： Takumi Hikichi , Osao Kido , Atsuo Okaichi , Noriyoshi Nishiyama , Yoshio Tomigashi , Masaaki Konoto , Osamu Kosuda , Subaru Matsumoto , Tetsuya Matsuyama
Abstract: A combined heat and power system according the present disclosure includes a Rankine cycle apparatus including an evaporator that heats a working fluid by heat exchange between the working fluid and a heat source medium, an expansion machine that converts expansion power of the working fluid into rotational power, and a condenser that cools the working fluid by heat exchange between the working fluid and a heat medium, and a thermal circuit for using the heat medium heated by the condenser. An expansion volume ratio of the expansion machine is equal to or less than an expansion ratio in a theoretical Rankine cycle determined based on a state of a temperature and a pressure of the working fluid at a discharge port of the expansion machine and a state of a temperature and a pressure of the working fluid at a suction port of the expansion machine.
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公开(公告)号：US09735635B2
公开(公告)日：2017-08-15
申请号：US14556165
申请日：2014-11-30
Inventor： Noriyoshi Nishiyama , Osao Kido , Atsuo Okaichi , Takumi Hikichi , Yoshio Tomigashi , Tetsuya Matsuyama , Masaaki Konoto , Osamu Kosuda , Subaru Matsumoto
Abstract: A permanent magnet synchronous machine includes a rotor including a core body and an overhang protruding further in an axial direction than a core of a stator. An end surface of the core body includes an N-region disposed on a north pole and an S-region disposed on a south pole. The overhang includes first permanent magnets arranged along an outer edge of the end surface with distances therebetween and a plurality of second permanent magnets disposed on the end surface and adjacent to the first permanent magnets. The first permanent magnets include at least one of a permanent magnet comprising a north pole facing the N-region and a permanent magnet comprising a south pole facing the S-region. The second permanent magnets are provided in the configuration which causes the second permanent magnets to generate a magnetic flux extending from the S-region toward the N-region.
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Patent Agency Ranking
公开(公告)号：US10560042B2
公开(公告)日：2020-02-11
申请号：US15398802
申请日：2017-01-05
Inventor： Tetsuya Matsuyama , Junki Yoshimoto
IPC: H02P3/14 , F04D17/10 , F04D25/06 , F04D25/16 , F04D27/00 , F04D29/053 , F04D29/056 , F04D29/063 , F04D29/28 , H02P5/74
Abstract: A turbocompressor apparatus includes a turbocompressor including a compressor motor, a lubrication pump including a pump motor, a converter that performs electric power conversion between a voltage of a power source and a direct-current voltage of a direct-current voltage unit in a case where electric power is being supplied from the power source to the turbocompressor apparatus; a first inverter that performs electric power conversion between the direct-current voltage and a first alternating-current voltage vector of the compressor motor; and a second inverter that performs electric power conversion between the direct-current voltage and a second alternating-current voltage vector of the pump motor. The compressor motor generates regenerative electric power by regenerative driving and the pump motor is driven by the regenerative electric power in a case where supply of electric power from the power source to the converter is being cut off.
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公开(公告)号：US11837982B2
公开(公告)日：2023-12-05
申请号：US17724308
申请日：2022-04-19
Inventor： Yuya Tanaka , Tetsuya Matsuyama
IPC: H02P23/14 , H02P25/022
CPC classification number: H02P23/14 , H02P25/022
Abstract: A rotary machine control device includes: a flux estimator that estimates a rotary machine flux; a command amplitude specifier that generates a command amplitude that is an amplitude of a command flux, by executing feedback control using a product of an estimated flux or an estimated magnet flux and a detected current; a command flux specifier that generates the command flux using the command amplitude; and a switcher that controls switching from a current synchronous operation to a flux control operation. When the switcher controls switching to the flux control operation, the flux estimator gives, to the feedback control, an amplitude of the estimated flux estimated before switching to the flux control operation, as an initial value of the command amplitude immediately after switching to the flux control operation.
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公开(公告)号：US09774223B2
公开(公告)日：2017-09-26
申请号：US14556165
申请日：2014-11-30
Inventor： Noriyoshi Nishiyama , Osao Kido , Atsuo Okaichi , Takumi Hikichi , Yoshio Tomigashi , Tetsuya Matsuyama , Masaaki Konoto , Osamu Kosuda , Subaru Matsumoto
CPC classification number: H02K1/278 , H02K1/2766 , H02K1/2786 , H02K21/14
Abstract: A permanent magnet synchronous machine includes a rotor including a core body and an overhang protruding further in an axial direction than a core of a stator. An end surface of the core body includes an N-region disposed on a north pole and an S-region disposed on a south pole. The overhang includes first permanent magnets arranged along an outer edge of the end surface with distances therebetween and a plurality of second permanent magnets disposed on the end surface and adjacent to the first permanent magnets. The first permanent magnets include at least one of a permanent magnet comprising a north pole facing the N-region and a permanent magnet comprising a south pole facing the S-region. The second permanent magnets are provided in the configuration which causes the second permanent magnets to generate a magnetic flux extending from the S-region toward the N-region.
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公开(公告)号：US10161684B2
公开(公告)日：2018-12-25
申请号：US15635486
申请日：2017-06-28
Inventor： Osamu Kosuda , Osao Kido , Atsuo Okaichi , Takumi Hikichi , Masaaki Konoto , Noriyoshi Nishiyama , Yoshio Tomigashi , Tetsuya Matsuyama
Abstract: An air cooling unit is an air cooling unit used in a Rankine cycle system and includes an expander and a condenser. The expander recovers energy from a working fluid by expanding the working fluid. The condenser cools the working fluid using air. The air cooling unit includes a heat-transfer reducer that reduces heat transfer between the expander and an air path.
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公开(公告)号：US09702263B2
公开(公告)日：2017-07-11
申请号：US14635307
申请日：2015-03-02
Inventor： Atsuo Okaichi , Osao Kido , Takumi Hikichi , Osamu Kosuda , Noriyoshi Nishiyama , Yoshio Tomigashi , Masaaki Konoto , Subaru Matsumoto , Tetsuya Matsuyama
CPC classification number: F01D17/085 , F01K9/003 , F01K13/02 , F01K25/08 , F05D2210/12 , F05D2220/31 , F05D2270/303 , F22B1/18 , Y02E20/14
Abstract: A Rankine cycle device in the present disclosure includes an evaporator as a heater, an expander, a cooler, a first temperature sensor, a second temperature sensor, and a control device. The first temperature sensor detects a temperature of the working fluid flowing from an outlet of the heater to an inlet of the expander in the circuit of the working fluid. The second temperature sensor detects a temperature of the working fluid flowing from an outlet of the expander to an inlet of the cooler. The controller controls a number of rotation of the expander based on a difference between a detected temperature of the first temperature sensor and a detected temperature of the second temperature sensor.
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