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公开(公告)号：US11581839B2
公开(公告)日：2023-02-14
申请号：US17279589
申请日：2019-01-23
发明人： Akane Hongyo , Akira Satake , Kenji Takahashi
IPC分类号： H02P27/06 , H02P29/024 , H02P25/18 , F25B31/02
摘要： 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.
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公开(公告)号：US10473367B2
公开(公告)日：2019-11-12
申请号：US14891903
申请日：2014-05-21
发明人： Tetsuhide Yokoyama , Yosuke Shinomoto , Shogo Moroe , Akira Satake , Masashi Fujitsuka , Takeshi Mori , Taro Kato , Hideaki Maeyama , Keiko Tada
摘要： 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.
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3.发明授权公开(公告)号：US11594993B2
公开(公告)日：2023-02-28
申请号：US17052574
申请日：2018-07-18
IPC分类号： H02P25/18 , H02P25/022 , H02P25/24 , H02P21/00
摘要： 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.
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公开(公告)号：US11489478B2
公开(公告)日：2022-11-01
申请号：US17287128
申请日：2019-04-23
发明人： Sota Sano , Akira Satake , Shinsaku Kusube
IPC分类号： H02P27/08 , G06N20/00 , H02M7/5395
摘要： 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.
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公开(公告)号：US10411633B2
公开(公告)日：2019-09-10
申请号：US15316920
申请日：2015-03-27
发明人： Yosuke Hachiya , Masato Ito , Hisanori Yamasaki , Akira Satake
摘要： 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 ω0 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 ω0, to the output torque, and the inertia moment computing unit calculates the moment of inertia J on the basis of the estimated speed ω0 and the output torque having the delay characteristic.
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公开(公告)号：US11177757B2
公开(公告)日：2021-11-16
申请号：US16754755
申请日：2017-12-07
申请人： Mitsubishi Electric Corporation , National University Corporation Nagaoka University of Technology
发明人： Sota Sano , Akira Satake , Kiyoshi Ohishi , Yuki Yokokura , Tenjiro Hiwatari
IPC分类号： H02P27/06 , H02P21/22 , H02M7/5387
摘要： 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.
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7.发明授权公开(公告)号：US11953555B2
公开(公告)日：2024-04-09
申请号：US16644168
申请日：2017-10-24
发明人： Makoto Kanemaru , Takuya Ohkubo , Sota Sano , Akira Satake , Satoru Terashima
IPC分类号： G01R31/34 , H02H7/08 , H02P29/024
CPC分类号： G01R31/343 , H02H7/08 , H02P29/027
摘要： 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.
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公开(公告)号：US11626825B2
公开(公告)日：2023-04-11
申请号：US17613954
申请日：2019-07-25
发明人： Akane Hongyo , Akira Satake
摘要： 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.
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