Patents by Inventor Tomoaki Shigeta
Tomoaki Shigeta 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: 11223313Abstract: A device according to an embodiment includes an inverter main circuit; a detector configured to detect a current of an output line of the inverter main circuit; a starting time controller comprising a rotational phase angle estimator configured to calculate, based on a current response value detected by the detector, a value corresponding to a rotational phase angle of a motor connected to the inverter main circuit in a stationary reference frame, and a rotational speed estimator configured to calculate a value corresponding to a rotational speed of the motor by using the value corresponding to the rotational phase angle when the inverter main circuit is started; and a regular time controller configured to calculate, with the value corresponding to the rotational speed as an initial value, an estimated rotational phase angle of the motor in a rotating reference frame.Type: GrantFiled: March 27, 2019Date of Patent: January 11, 2022Assignees: Toshiba Infrastructure Systems & Solutions Corporation, Toshiba Industrial Products and Systems CorporationInventors: Shun Taniguchi, Kazuya Yasui, Tomoaki Shigeta
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Publication number: 20210221879Abstract: The present invention is directed to providing a monoclonal antibody having high selectivity and affinity for AGEs, particularly, AGEs derived from glyceraldehyde or AGEs derived from glycolaldehyde, and an analysis method utilizing the same. Another object of the present invention is to provide methods for diagnosing, treating and preventing a disease using the monoclonal antibody.Type: ApplicationFiled: August 30, 2019Publication date: July 22, 2021Inventors: Tetsuro YAMAMOTO, Shota TSUCHIDA, Tomoaki SHIGETA, Kazumi SASAMOTO, Mami CHIRIFU
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Patent number: 10833613Abstract: An inverter control apparatus and a motor drive system includes an inverter main circuit that drives a synchronous motor; an electric-current detector that detects an electric current flowing between the inverter main circuit and the synchronous motor; a command generator that generates an electric-current command value of an output electric current that is output from the inverter main circuit to the synchronous motor, in accordance with a torque command that is supplied externally; and an electric-current controller that generates a voltage command value for the inverter main circuit so that the electric-current command value and a detected electric-current value detected in the electric-current detector are equal to each other. The command generator generates the electric-current command value so that a fundamental wave current that is equal to or greater than a threshold is supplied to the synchronous motor, in driving the inverter main circuit.Type: GrantFiled: March 4, 2019Date of Patent: November 10, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tomoaki Shigeta, Shun Taniguchi, Kazuya Yasui
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Patent number: 10742151Abstract: A device according to an embodiment includes an circuit; a detector for detecting a current response output from the circuit; a vector converter for converting the current response into a d-axis current and a q-axis current by using a rotational phase angle of a motor connected to the circuit; a calculator for calculating, based on a torque command and a current phase angle command, a current amplitude command of the current response output from the circuit; a dq-axes converter for calculating a d-axis current command and a q-axis current command from the current amplitude command and the current phase angle command; and a controller for calculating a voltage command so that the d-axis current command and the q-axis current command are equal to the d-axis current and the q-axis current.Type: GrantFiled: March 5, 2019Date of Patent: August 11, 2020Assignees: Toshiba Infrastructure Systems & Solutions Corporation, Toshiba Industrial Products and Systems CorporationInventors: Shun Taniguchi, Kazuya Yasui, Tomoaki Shigeta
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Patent number: 10637381Abstract: A device according to an embodiment including a command generator that generates a current command value; a detector that detects a current value to be outputted from an inverter to an motor; a generator that generates a gate command to the inverter, and obtains an output voltage target vector of the inverter based on the gate command; an estimator that obtains a rotary phase angle estimated value of the motor based on the detected current value and the output voltage target vector; and a polarity determination part that, with supply of a current in synchronism with a rotor frequency of the motor, performs determination of a magnet magnetic pole using a generated magnetic flux or voltage in synchronism with the generated rotor frequency or both of them, and outputs a correction value for the rotary phase angle estimated value based on a result of the determination.Type: GrantFiled: February 21, 2019Date of Patent: April 28, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tomoaki Shigeta, Shun Taniguchi, Kentaro Suzuki, Kazuaki Yuuki
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Patent number: 10498277Abstract: A drive system of an embodiment includes an inverter for driving an electric motor; a detector that detects an electric current value output from the inverter; command generators that generate an electric current command value corresponding to an electric current to be supplied to the electric motor and a gate command of the inverter so that the electric current command value matches the electric current value; calculators that calculate an voltage target vector of the inverter and a rotation phase estimation value of the electric motor based on the electric current value and the voltage target vector, in an initial estimation of when activating the inverter. The electric current command value in the initial estimation is a value to supply an electric current for magnetically saturating a rotor of the electric motor, and a dynamic inductance of the electric motor used for calculating the rotation phase estimation value is a value of when the rotor of the electric motor is magnetically saturated.Type: GrantFiled: February 26, 2018Date of Patent: December 3, 2019Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tomoaki Shigeta, Shun Taniguchi, Kentaro Suzuki, Kazuaki Yuuki
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Publication number: 20190222158Abstract: A device according to an embodiment includes an inverter main circuit; a detector configured to detect a current of an output line of the inverter main circuit; a starting time controller comprising a rotational phase angle estimator configured to calculate, based on a current response value detected by the detector, a value corresponding to a rotational phase angle of a motor connected to the inverter main circuit in a stationary reference frame, and a rotational speed estimator configured to calculate a value corresponding to a rotational speed of the motor by using the value corresponding to the rotational phase angle when the inverter main circuit is started; and a regular time controller configured to calculate, with the value corresponding to the rotational speed as an initial value, an estimated rotational phase angle of the motor in a rotating reference frame.Type: ApplicationFiled: March 27, 2019Publication date: July 18, 2019Inventors: Shun Taniguchi, Kazuya Yasui, Tomoaki Shigeta
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Publication number: 20190199260Abstract: A device according to an embodiment includes an circuit; a detector for detecting a current response output from the circuit; a vector converter for converting the current response into a d-axis current and a q-axis current by using a rotational phase angle of a motor connected to the circuit; a calculator for calculating, based on a torque command and a current phase angle command, a current amplitude command of the current response output from the circuit; a dq-axes converter for calculating a d-axis current command and a q-axis current command from the current amplitude command and the current phase angle command; and a controller for calculating a voltage command so that the d-axis current command and the q-axis current command are equal to the d-axis current and the q-axis current.Type: ApplicationFiled: March 5, 2019Publication date: June 27, 2019Inventors: Shun Taniguchi, Kazuya Yasui, Tomoaki Shigeta
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Publication number: 20190199253Abstract: An inverter control apparatus and a motor drive system includes an inverter main circuit that drives a synchronous motor; an electric-current detector that detects an electric current flowing between the inverter main circuit and the synchronous motor; a command generator that generates an electric-current command value of an output electric current that is output from the inverter main circuit to the synchronous motor, in accordance with a torque command that is supplied externally; and an electric-current controller that generates a voltage command value for the inverter main circuit so that the electric-current command value and a detected electric-current value detected in the electric-current detector are equal to each other. The command generator generates the electric-current command value so that a fundamental wave current that is equal to or greater than a threshold is supplied to the synchronous motor, in driving the inverter main circuit.Type: ApplicationFiled: March 4, 2019Publication date: June 27, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tomoaki SHIGETA, Shun TANIGUCHI, Kazuya YASUI
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Publication number: 20190190421Abstract: A device according to an embodiment including a command generator that generates a current command value; a detector that detects a current value to be outputted from an inverter to an motor; a generator that generates a gate command to the inverter, and obtains an output voltage target vector of the inverter based on the gate command; an estimator that obtains a rotary phase angle estimated value of the motor based on the detected current value and the output voltage target vector; and a polarity determination part that, with supply of a current in synchronism with a rotor frequency of the motor, performs determination of a magnet magnetic pole using a generated magnetic flux or voltage in synchronism with the generated rotor frequency or both of them, and outputs a correction value for the rotary phase angle estimated value based on a result of the determination.Type: ApplicationFiled: February 21, 2019Publication date: June 20, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tomoaki SHIGETA, Shun Taniguchi, Kentaro Suzuki, Kazuaki Yuuki
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Patent number: 10158305Abstract: An inverter controller according to an embodiment has an inverter main circuit, current detectors, a current command value calculator, a voltage command value calculator and an estimator. The inverter main circuit is capable of being electrically connected to a rotary drive target. The current detectors detect current values output from the inverter main circuit. The current command value calculator calculates current command values with which an output voltage output from the inverter main circuit becomes equal to or more than a target value. The voltage command value calculator calculates voltage command values with which the current values become equal to the current command values. The estimator calculates an estimated rotational phase angle of the rotary drive target, based on the voltage command values and the current values.Type: GrantFiled: June 28, 2017Date of Patent: December 18, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shun Taniguchi, Kazuaki Yuuki, Kentaro Suzuki, Tomoaki Shigeta
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Publication number: 20180191285Abstract: A drive system of an embodiment includes an inverter for driving an electric motor; a detector that detects an electric current value output from the inverter; command generators that generate an electric current command value corresponding to an electric current to be supplied to the electric motor and a gate command of the inverter so that the electric current command value matches the electric current value; calculators that calculate an voltage target vector of the inverter and a rotation phase estimation value of the electric motor based on the electric current value and the voltage target vector, in an initial estimation of when activating the inverter. The electric current command value in the initial estimation is a value to supply an electric current for magnetically saturating a rotor of the electric motor, and a dynamic inductance of the electric motor used for calculating the rotation phase estimation value is a value of when the rotor of the electric motor is magnetically saturated.Type: ApplicationFiled: February 26, 2018Publication date: July 5, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tomoaki SHIGETA, Shun TANIGUCHI, Kentaro SUZUKI, Kazuaki YUUKI
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Publication number: 20170317623Abstract: An inverter controller according to an embodiment has an inverter main circuit, current detectors, a current command value calculator, a voltage command value calculator and an estimator. The inverter main circuit is capable of being electrically connected to a rotary drive target. The current detectors detect current values output from the inverter main circuit. The current command value calculator calculates current command values with which an output voltage output from the inverter main circuit becomes equal to or more than a target value. The voltage command value calculator calculates voltage command values with which the current values become equal to the current command values. The estimator calculates an estimated rotational phase angle of the rotary drive target, based on the voltage command values and the current values.Type: ApplicationFiled: June 28, 2017Publication date: November 2, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shun TANIGUCHI, Kazuaki YUUKI, Kentaro SUZUKI, Tomoaki SHIGETA
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Publication number: 20170264227Abstract: An inverter control device according to an embodiment includes an inverter main circuit, a current instruction generator, a voltage instruction generator, an estimator, a high-frequency wave superimposer. The inverter main circuit is electrically connectable to a predetermined rotational drive target. The current instruction generator generates a current instruction. The voltage instruction generator generates a voltage instruction causing a current output from the inverter main circuit to be equal to the current instruction. The estimator calculates an estimation rotational phase angle of the rotational drive target. The high-frequency wave superimposer superimposes a high-frequency wave on the current instruction or the voltage instruction according to a relation between a feature amount of the rotational drive target and a threshold.Type: ApplicationFiled: May 26, 2017Publication date: September 14, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tomoaki SHIGETA, Shun TANIGUCHI, Kentaro SUZUKI, Kazuaki YUUKI
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Patent number: 6820983Abstract: A dichroic prism 10 according to the present invention comprises first to fourth right angle prisms 12, 14, 16 and 18 respectively having first side faces 28, 34, 40 and 46, and second side faces 30, 36, 42 and 48, the side faces being arranged perpendicular to each other. A second bonded face 22 and a fourth bonded face 26, each having a dichroic film for a second color light, are arranged on the same plane. The first bonded face 20 and a third bonded face 26, each having the dichroic film for a first color light, are deviated by a predetermined distance. The distance of this deviation is adjusted so that an image formed by the light having reference image information corresponds to the image of the reference image information. The light is made incident on and reflected by the first bonded face and the third bonded face. Therefore, an appropriate image quality can be obtained without depending on a right angle precision.Type: GrantFiled: October 30, 2003Date of Patent: November 23, 2004Assignee: Fuji Photo Optical Co., Ltd.Inventors: Satoru Kawaai, Tomoaki Shigeta, Kouichirou Monma
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Publication number: 20040119948Abstract: A dichroic prism 10 according to the present invention comprises first to fourth right angle prisms 12, 14, 16 and 18 respectively having first side faces 28, 34, 40 and 46, and second side faces 30, 36, 42 and 48, the side faces being arranged perpendicular to each other. A second bonded face 22 and a fourth bonded face 26, each having a dichroic film for a second color light, are arranged on the same plane. The first bonded face 20 and a third bonded face 26, each having the dichroic film for a first color light, are deviated by a predetermined distance. The distance of this deviation is adjusted so that an image formed by the light having reference image information corresponds to the image of the reference image information. The light is made incident on and reflected by the first bonded face and the third bonded face. Therefore, an appropriate image quality can be obtained without depending on a right angle precision.Type: ApplicationFiled: October 30, 2003Publication date: June 24, 2004Applicant: Fuji Photo Optical Co., Ltd.Inventors: Satoru Kawaai, Tomoaki Shigeta, Kouichirou Monma