Patents by Inventor Arinori Shimada
Arinori Shimada 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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Publication number: 20150357956Abstract: A rotary electric machine control device that controls a rotary electric machine that includes a rotor in which a permanent magnet is disposed so as to provide magnetic saliency, and that performs feedback control on the rotary electric machine on the basis of a deviation between a current command and a feedback current from the rotary electric machine in a d-q-axis vector coordinate system defined by a d-axis which extends in a direction of a magnetic field produced by the permanent magnet and a q-axis which is orthogonal to the d-axis.Type: ApplicationFiled: March 28, 2014Publication date: December 10, 2015Inventors: Arinori SHIMADA, Tatsuya OKUBO, Subrata SAHA
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Patent number: 9106174Abstract: An inverter control section controls the inverter by controlling an armature current in a two-axis orthogonal coordinate system that rotates in synchronization with the rotary electric machine, the armature current being a vector obtained by synthesizing a field current and a drive current extending along respective axes of the orthogonal coordinate system. If it is determined that connection between the DC power source section and the inverter is in a blocked state, the inverter control section executes zero-torque control in which the inverter is controlled such that torque regenerated by the rotary electric machine becomes zero, and executes high-loss control in which the field current is varied so as to increase the armature current while maintaining a torque command provided in the zero-torque control.Type: GrantFiled: June 15, 2012Date of Patent: August 11, 2015Assignee: AISIN AW CO., LTD.Inventors: Takaomi Sekiya, Subrata Saha, Mitsuru Nakamura, Arinori Shimada
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Patent number: 9059653Abstract: A rotating electrical machine control device that applies a high frequency current to a rotating electrical machine including a rotor having saliency, estimates a magnetic pole direction of the rotor on the basis of a high frequency component contained in a voltage command as a response component to the high frequency current, and controls the rotating electrical machine. A high frequency superimposing section sets an estimated d-q axis rotating coordinate system, and a magnetic pole direction adjusting section sets a high frequency coordinate system having a phase difference of the high frequency current command with respect to the estimated d-q axis rotating coordinate system. A steady estimation error correcting section calculates a magnetic flux interference estimation error as an error of the estimated value of the magnetic pole direction which is caused by the d-q axis magnetic flux interference.Type: GrantFiled: October 17, 2012Date of Patent: June 16, 2015Assignee: AISIN AW CO., LTD.Inventors: Arinori Shimada, Subrata Saha
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Patent number: 9018870Abstract: A control device for a rotating electrical machine, which is able to reduce a tracking delay of an actual output torque and actual currents with respect to a fluctuating torque command and fluctuating current commands and to reduce steady state deviations, is obtained. The control device includes a torque current computing unit; an actual current computing unit; a current feedback control unit; and a voltage control unit that controls voltages on the basis of the two-phase voltage commands. The torque command includes a fluctuation cancellation torque command for cancelling transmission torque fluctuations transmitted from the internal combustion engine, and the current feedback control unit includes a harmonic controller that calculates the two-phase voltage commands by using a characteristic of a transfer function corresponding to a periodic function of a frequency of the transmission torque fluctuations.Type: GrantFiled: March 23, 2012Date of Patent: April 28, 2015Assignee: Aisin AW Co., Ltd.Inventors: Hirokazu Kobayashi, Arinori Shimada, Takeshi Aoki, Subrata Saha, Ken Iwatsuki
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Publication number: 20140232304Abstract: Regenerated power fed from a rotary electric machine is immediately reduced where connection between an electric machine and a DC power source is blocked. An inverter control section controls the inverter by controlling an armature current in a two-axis orthogonal coordinate system that rotates in synchronization with the rotary electric machine, the armature current being a vector obtained by synthesizing a field current and a drive current extending along respective axes of the orthogonal coordinate system. If it is determined that connection between the DC power source section and the inverter is in a blocked state, the inverter control section executes zero-torque control in which the inverter is controlled such that torque regenerated by the rotary electric machine becomes zero, and executes high-loss control in which the field current is varied so as to increase the armature current while maintaining a torque command provided in the zero-torque control.Type: ApplicationFiled: June 15, 2012Publication date: August 21, 2014Applicant: AISIN AW CO., LTD.Inventors: Takaomi Sekiya, Subrata Saha, Mitsuru Nakamura, Arinori Shimada
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Patent number: 8812184Abstract: A control device configured with a vibration reduction necessity determination section that determines whether or not a required drive operation point falls within a reduction necessary range, which is prescribed in advance as a range in which it is necessary to reduce torque vibration transferred from the internal combustion engine to the rotary electric machine. A cancellation control execution determination section that determines whether or not torque vibration cancellation control can be executed in the case where it is determined that the required drive operation point falls within the reduction necessary range. An execution control decision section that decides to execute the torque vibration cancellation control in the case where it is determined that the torque vibration cancellation control can be executed and that decides to execute operation point change control in the case where it is determined that the torque vibration cancellation control cannot be executed.Type: GrantFiled: September 21, 2011Date of Patent: August 19, 2014Assignee: Aisin Aw Co., Ltd.Inventors: Yomei Hakumura, Yoichi Tajima, Hirokazu Kobayashi, Arinori Shimada
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Publication number: 20140145660Abstract: A rotating electrical machine control device that applies a high frequency current to a rotating electrical machine including a rotor having saliency, estimates a magnetic pole direction of the rotor on the basis of a high frequency component contained in a voltage command as a response component to the high frequency current, and controls the rotating electrical machine. A high frequency superimposing section sets an estimated d-q axis rotating coordinate system, and a magnetic pole direction adjusting section sets a high frequency coordinate system having a phase difference of the high frequency current command with respect to the estimated d-q axis rotating coordinate system. A steady estimation error correcting section calculates a magnetic flux interference estimation error as an error of the estimated value of the magnetic pole direction which is caused by the d-q axis magnetic flux interference.Type: ApplicationFiled: October 17, 2012Publication date: May 29, 2014Applicant: Aisin AW Co., Ltd.Inventors: Arinori Shimada, Subrata Saha
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Publication number: 20130307449Abstract: A control device for a rotating electrical machine, which is able to reduce a tracking delay of an actual output torque and actual currents with respect to a fluctuating torque command and fluctuating current commands and to reduce steady state deviations, is obtained. The control device includes a torque current computing unit; an actual current computing unit; a current feedback control unit; and a voltage control unit that controls voltages on the basis of the two-phase voltage commands. The torque command includes a fluctuation cancellation torque command for cancelling transmission torque fluctuations transmitted from the internal combustion engine, and the current feedback control unit includes a harmonic controller that calculates the two-phase voltage commands by using a characteristic of a transfer function corresponding to a periodic function of a frequency of the transmission torque fluctuations.Type: ApplicationFiled: March 23, 2012Publication date: November 21, 2013Applicant: AISIN AW CO., LTD.Inventors: Hirokazu Kobayashi, Arinori Shimada, Takeshi Aoki, Subrata Saha, Ken Iwatsuki
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Patent number: 8497645Abstract: A control device that controls an electric motor drive device is configured with a current control portion that determines a voltage command value, a voltage control portion that generates a switching control signal, and a current control period determining portion. The control device is also configured with a voltage control period determining portion that determines a voltage control period, and a control period setting portion. In the control device, the current control period determining portion determines, according to a target torque, the current control period as a value that increases continuously or stepwise as the target torque decreases. Furthermore, the voltage control period determining portion determines, according to a rotating speed, the voltage control period as a value that increases continuously or stepwise as the rotating speed decreases.Type: GrantFiled: October 22, 2010Date of Patent: July 30, 2013Assignee: Aisin AW Co., Ltd.Inventors: Arinori Shimada, Subrata Saha, Ken Iwatsuki
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Patent number: 8390223Abstract: A control device that controls an electric motor drive device. The control device is configured with a first voltage control section that derives a modulation rate representing a ratio of an effective value of the voltage command values to the DC voltage and a voltage command phase. A second voltage control section generates a control signal for controlling the DC/AC conversion section on the basis of the modulation rate, the voltage command phase, and a magnetic pole position representing a rotational angle of a rotator of the AC electric motor. A computation cycle of the first voltage control section is set to be longer than a computation cycle of the second voltage control section.Type: GrantFiled: August 12, 2010Date of Patent: March 5, 2013Assignee: Aisin AW Co., Ltd.Inventors: Mitsuru Nakamura, Arinori Shimada, Subrata Saha, Ken Iwatsuki, Zhiqian Chen
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Patent number: 8278865Abstract: A control device that controls a plurality of inverters respectively provided corresponding to a plurality of alternating-current electric motors so as to control the plurality of alternating-current electric motors by current feedback. The control device comprises a carrier frequency setting unit that individually selects and sets one of a plurality of carrier frequencies, each of which is a frequency of a carrier for generating switching control signals for the inverter based on a pulse width modulation method, for each of the plurality of inverters, and a switching timing table that specifies a switching timing serving as a permissible timing of switching to a different carrier frequency pair from each of a plurality of carrier frequency pairs each of which is composed of a combination of the carrier frequencies set for each of the plurality of inverters.Type: GrantFiled: August 31, 2010Date of Patent: October 2, 2012Assignee: Aisin AW Co., Ltd.Inventors: Arinori Shimada, Mitsuru Nakamura, Subrata Saha, Ken Iwatsuki
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Patent number: 8232753Abstract: A electric motor drive apparatus comprising a voltage control unit performing voltage control processing that determines alternating-current voltage command values serving as command values of the alternating-current voltages to be supplied to the alternating-current electric motor and generates switching control signals for the inverter; and a control mode selection unit selecting a synchronous control mode in which a cycle of electric angle of the alternating-current electric motor is synchronized with a switching cycle of the inverter, or an asynchronous control mode in which the cycles are not synchronized with each other. Current detection processing is performed to detect currents flowing in coils of the alternating-current electric motor in every standard calculation cycle that is set to a half of a cycle of the carrier.Type: GrantFiled: August 31, 2010Date of Patent: July 31, 2012Assignee: Aisin AW Co., Ltd.Inventors: Arinori Shimada, Mitsuru Nakamura, Subrata Saha, Ken Iwatsuki
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Publication number: 20120078456Abstract: A control device configured with a vibration reduction necessity determination section that determines whether or not a required drive operation point falls within a reduction necessary range, which is prescribed in advance as a range in which it is necessary to reduce torque vibration transferred from the internal combustion engine to the rotary electric machine. A cancellation control execution determination section that determines whether or not torque vibration cancellation control can be executed in the case where it is determined that the required drive operation point falls within the reduction necessary range. An execution control decision section that decides to execute the torque vibration cancellation control in the case where it is determined that the torque vibration cancellation control can be executed and that decides to execute operation point change control in the case where it is determined that the torque vibration cancellation control cannot be executed.Type: ApplicationFiled: September 21, 2011Publication date: March 29, 2012Applicant: AISIN AW CO., LTD.Inventors: Yomei HAKUMURA, Yoichi TAJIMA, Hirokazu KOBAYASHI, Arinori SHIMADA
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Publication number: 20120032620Abstract: A control device that controls for an electric motor drive device including a DC/AC conversion section that converts a DC voltage into an AC voltage to supply the AC voltage to an AC electric motor. The control device is configured with a computation cycle setting section that sets a computation cycle of the control signal generation section to a first cycle, which is N times (N is an integer of 1 or more) a reference computation cycle that is set to half a carrier cycle, and that sets a computation cycle of the voltage command value determination section to a second cycle, which is M times (M is an integer of 2 or more) the first cycle, in the case where the control mode determined by the control mode determination section is the pulse width modulation control mode.Type: ApplicationFiled: June 28, 2011Publication date: February 9, 2012Applicant: AISIN AW CO., LTD.Inventors: Arinori SHIMADA, Subrata SAHA, Ken IWATSUKI
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Publication number: 20110127933Abstract: A control device that controls an electric motor drive device is configured with a current control portion that determines a voltage command value, a voltage control portion that generates a switching control signal, and a current control period determining portion. The control device is also configured with a voltage control period determining portion that determines a voltage control period, and a control period setting portion. In the control device, the current control period determining portion determines, according to a target torque, the current control period as a value that increases continuously or stepwise as the target torque decreases. Furthermore, the voltage control period determining portion determines, according to a rotating speed, the voltage control period as a value that increases continuously or stepwise as the rotating speed decreases.Type: ApplicationFiled: October 22, 2010Publication date: June 2, 2011Applicant: AISIN AW CO., LTD.Inventors: Arinori SHIMADA, Subrata SAHA, Ken IWATSUKI
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Publication number: 20110080125Abstract: A electric motor drive apparatus comprising a voltage control unit performing voltage control processing that determines alternating-current voltage command values serving as command values of the alternating-current voltages to be supplied to the alternating-current electric motor and generates switching control signals for the inverter; and a control mode selection unit selecting a synchronous control mode in which a cycle of electric angle of the alternating-current electric motor is synchronized with a switching cycle of the inverter, or an asynchronous control mode in which the cycles are not synchronized with each other. Current detection processing is performed to detect currents flowing in coils of the alternating-current electric motor in every standard calculation cycle that is set to a half of a cycle of the carrier.Type: ApplicationFiled: August 31, 2010Publication date: April 7, 2011Applicant: AISIN AW CO., LTD.Inventors: Arinori SHIMADA, Mitsuru Nakamura, Subrata Saha, Ken Iwatsuki
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Publication number: 20110080131Abstract: A control device that controls a plurality of inverters respectively provided corresponding to a plurality of alternating-current electric motors so as to control the plurality of alternating-current electric motors by current feedback. The control device comprises a carrier frequency setting unit that individually selects and sets one of a plurality of carrier frequencies, each of which is a frequency of a carrier for generating switching control signals for the inverter based on a pulse width modulation method, for each of the plurality of inverters, and a switching timing table that specifies a switching timing serving as a permissible timing of switching to a different carrier frequency pair from each of a plurality of carrier frequency pairs each of which is composed of a combination of the carrier frequencies set for each of the plurality of inverters.Type: ApplicationFiled: August 31, 2010Publication date: April 7, 2011Applicant: AISIN AW CO., LTD.Inventors: Arinori SHIMADA, Mitsuru Nakamura, Subrata Saha, Ken Iwatsuki
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Publication number: 20110074320Abstract: A control device that controls an electric motor drive device. The control device is configured with a first voltage control section that derives a modulation rate representing a ratio of an effective value of the voltage command values to the DC voltage and a voltage command phase. A second voltage control section generates a control signal for controlling the DC/AC conversion section on the basis of the modulation rate, the voltage command phase, and a magnetic pole position representing a rotational angle of a rotator of the AC electric motor. A computation cycle of the first voltage control section is set to be longer than a computation cycle of the second voltage control section.Type: ApplicationFiled: August 12, 2010Publication date: March 31, 2011Applicant: AISIN AW CO., LTD.Inventors: Mitsuru NAKAMURA, Arinori Shimada, Subrata Saha, Ken Iwatsuki, Zhiqian Chen