Patents by Inventor Munenori Yamamoto
Munenori Yamamoto 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: 20240043000Abstract: A target trajectory computation device includes: an in-the-same-path determination unit that determines, on the basis of dividing line information and preceding vehicle information, presence or absence of a preceding vehicle traveling on the same path as a vehicle; and a target-trajectory setting unit that, in a case where a dividing-line-information acquisition unit can acquire dividing line information on only one of a left dividing line and a right dividing line, computes a target trajectory on the basis of the acquired dividing line information on the one dividing line when the in-the-same-path determination unit determines that there is a preceding vehicle traveling on the same path, and omits to compute the target trajectory when it is determined that there is no preceding vehicle traveling on the same path.Type: ApplicationFiled: January 22, 2021Publication date: February 8, 2024Applicant: Mitsubishi Electric CorporationInventors: Yusuke MATSUO, Munenori YAMAMOTO, Hiroyuki KOBAYASHI, Shunsuke NAKAJIMA
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Patent number: 11431273Abstract: To provide a controller for a rotary machine which can simplify a configuration required for checking the shutoff function of the switching device, and an electric power steering apparatus therewith. A controller for a rotary machine performs a high potential side forcible shutoff which forcibly shuts off a high potential side switching device of a diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes positive, or a low potential side forcible shutoff which forcibly shuts off a low potential side switching device of the diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes negative; and determines failure of the device shutoff unit based on a detection value of current or voltage when performing the high potential side forcible shutoff or the low potential side forcible shutoff.Type: GrantFiled: November 14, 2016Date of Patent: August 30, 2022Assignee: Mitsubishi Electric CorporationInventors: Akira Furukawa, Tatsuya Mori, Munenori Yamamoto
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Patent number: 11237021Abstract: Provided are a failure determination device and method for a rotating machine control device, which are capable of detecting failure of a sensor configured to detect a rotational position of a rotating machine while the rotating machine is in operation. A rotation angle estimator calculates a rotation angle estimation value. A relationship between the rotation angle estimation value (?est), and a first angle detection value (?1) and a second angle detection value (?2), which are obtained from output signals of angle sensors configured to detect a rotational position of a rotating machine, is monitored while the rotating machine is in operation. In this manner, failure of the angle sensors, which are configured to detect the rotational position of the rotating machine, can be always detected even while the rotating machine is in operation.Type: GrantFiled: April 28, 2016Date of Patent: February 1, 2022Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Isao Kezobo, Munenori Yamamoto, Akira Furukawa
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Patent number: 11150075Abstract: An angle detection device including: an angle sensor AGSE outputting first and second sine wave signals SINWS1, SINWS2 having phases that are different from each other by 90 degrees in accordance with rotation of a detection target; an angle calculator calculating an angle signal corresponding to a rotation angle of the detection target based on SINWS1 and SINWS2; and an angle sensor AGSE abnormality determiner ASAD determining an abnormality of AGSE based on SINWS1 and SINWS2. The ASAD includes: an amplitude signal calculator calculating an amplitude signal MALS based on a square root of a sum of squares of SINWS1 and SINWS2; a first angle signal ANGS1 calculation processor calculating ANGS1 based on SINWS1 and MALS; a second angle signal ANGS2 calculation processor calculating ANGS2 based on SINWS2 and MALS; and an abnormality determination processor determining the abnormality of AGSE based on an error between ANGS1 and ANGS2.Type: GrantFiled: April 28, 2016Date of Patent: October 19, 2021Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Isao Kezobo, Munenori Yamamoto, Akira Furukawa
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Patent number: 11005405Abstract: When a switching device cutoff failure determination unit determines a failure in a switching device cutoff switching unit, output torque produced based on the first armature winding and output torque produced based on the second armature winding are produced in such a way that the respective directions thereof are opposite to each other.Type: GrantFiled: November 16, 2016Date of Patent: May 11, 2021Assignee: Mitsubishi Electric CorporationInventors: Akira Furukawa, Munenori Yamamoto
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Patent number: 10970147Abstract: An abnormality determination means performs detection of abnormality of one of the pairs of detection means at a normal speed, and performs detection of abnormality of the other of the pairs at a speed not higher than the normal speed, and, when a sign of abnormality of the detection means is detected at the normal speed, a CPU performs switching to the other normal pair and continues control, and the abnormality determination means performs detection of abnormality of the other normal pair at the normal speed, and meanwhile, continues to perform detection of abnormality of the abnormal pair at a speed not higher than the normal speed.Type: GrantFiled: May 24, 2016Date of Patent: April 6, 2021Assignee: Mitsubishi Electric CorporationInventors: Eiji Iwami, Munenori Yamamoto
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Patent number: 10864937Abstract: When detecting an abnormality in a portion related to control of an electric motor, a CPU that calculates a control amount for controlling the electric motor calculates a control amount different from a control amount at a normal time so as to continue the control of the electric motor and changes a threshold value for detecting the abnormality to a value different from a value at a normal time.Type: GrantFiled: March 30, 2017Date of Patent: December 15, 2020Assignee: Mitsubishi Electric CorporationInventors: Munenori Yamamoto, Akihiko Mori, Jun Suzumura
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Patent number: 10797620Abstract: A control unit includes: control command generation means for generating a first control command and a second control command that specifies currents to flow through a first winding set and second winding set respectively; voltage calculation means for calculating a first voltage command from the first control command and calculating a second voltage command from the second control command; and first voltage application means and second voltage application means for applying voltages to the first winding set and the second winding set of a rotating machine on the basis of the first voltage command and the second voltage command, wherein discharge control for electric charge of a smoothing capacitor is performed while torque generated by current flowing from the smoothing capacitor to the first winding set and torque generated by current flowing from the capacitor to the second winding set are cancelled out with each other.Type: GrantFiled: August 24, 2016Date of Patent: October 6, 2020Assignee: Mitsubishi Electric CorporationInventors: Akira Furukawa, Munenori Yamamoto
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Publication number: 20200300601Abstract: An angle detection device including: an angle sensor AGSE outputting first and second sine wave signals SINWS1, SINWS2 having phases that are different from each other by 90 degrees in accordance with rotation of a detection target; an angle calculator calculating an angle signal corresponding to a rotation angle of the detection target based on SINWS1 and SINWS2; and an angle sensor AGSE abnormality determiner ASAD determining an abnormality of AGSE based on SINWS1 and SINWS2. The ASAD includes: an amplitude signal calculator calculating an amplitude signal MALS based on a square root of a sum of squares of SINWS1 and SINWS2; a first angle signal ANGS1 calculation processor calculating ANGS1 based on SINWS1 and MALS; a second angle signal ANGS2 calculation processor calculating ANGS2 based on SINWS2 and MALS; and an abnormality determination processor determining the abnormality of AGSE based on an error between ANGS1 and ANGS2.Type: ApplicationFiled: April 28, 2016Publication date: September 24, 2020Applicant: Mitsubishi Electric CorporationInventors: Tatsuya MORI, Isao KEZOBO, Munenori YAMAMOTO, Akira FURUKAWA
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Publication number: 20200300671Abstract: Provided are a failure determination device and method for a rotating machine control device, which are capable of detecting failure of a sensor configured to detect a rotational position of a rotating machine while the rotating machine is in operation. A rotation angle estimator calculates a rotation angle estimation value. A relationship between the rotation angle estimation value (?est), and a first angle detection value (?1) and a second angle detection value (?2), which are obtained from output signals of angle sensors configured to detect a rotational position of a rotating machine, is monitored while the rotating machine is in operation. In this manner, failure of the angle sensors, which are configured to detect the rotational position of the rotating machine, can be always detected even while the rotating machine is in operation.Type: ApplicationFiled: April 28, 2016Publication date: September 24, 2020Applicant: Mitsubishi Electric CorporationInventors: Tatsuya MORI, Isao KEZOBO, Munenori YAMAMOTO, Akira FURUKAWA
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Patent number: 10703404Abstract: In an electric power steering device, if a semiconductor switching element is used between a battery and a bridge circuit for opening and closing a current path, this arises a problem of generation of heat by an ON resistance; for this reason, a current flowing through the semiconductor switching element is limited if a difference between the gate voltage and the source voltage of the semiconductor switching element is smaller than or equal to a predetermined value.Type: GrantFiled: April 13, 2015Date of Patent: July 7, 2020Assignee: Mitsubishi Electric CorporationInventors: Munenori Yamamoto, Hiroshi Nishimura
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Failure determination device for angle detector of rotating machine and failure determination method
Patent number: 10666170Abstract: A failure determination device for an angle detector for a rotating machine, including: an angle detector, which includes n pole pairs (n>m), and outputs sine and cosine wave-signals in accordance with a rotational position of a rotating machine including a multi-phase winding and m pole pairs (m?2); and a failure determiner for detecting failure of the detector based on signals from the detector. The detector outputs first and second sine-wave-signals having 180° phases different, and first and second cosine-wave-signals having 180° phases different. The failure determiner determines malfunction of the detector when the failure is determined with use of at least one of: failure determination using a sum of the first and second sine-wave-signals and a sum of the first and second cosine-wave-signals; or failure determination using a sum of squares or a square root of a sum of squares of the sine-wave-signal and the cosine-wave-signal.Type: GrantFiled: April 28, 2016Date of Patent: May 26, 2020Assignee: Mitsubishi Electric CorporationInventors: Akira Furukawa, Yu Kawano, Munenori Yamamoto -
Publication number: 20200055542Abstract: When detecting an abnormality in a portion related to control of an electric motor, a CPU that calculates a control amount for controlling the electric motor calculates a control amount different from a control amount at a normal time so as to continue the control of the electric motor and changes a threshold value for detecting the abnormality to a value different from a value at a normal time.Type: ApplicationFiled: March 30, 2017Publication date: February 20, 2020Applicant: Mitsubishi Electric CorporationInventors: Munenori YAMAMOTO, Akihiko MORI, Jun SUZUMURA
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Publication number: 20190280629Abstract: A control unit includes: control command generation means for generating a first control command and a second control command that specifies currents to flow through a first winding set and second winding set respectively; voltage calculation means for calculating a first voltage command from the first control command and calculating a second voltage command from the second control command; and first voltage application means and second voltage application means for applying voltages to the first winding set and the second winding set of a rotating machine on the basis of the first voltage command and the second voltage command, wherein discharge control for electric charge of a smoothing capacitor is performed while torque generated by current flowing from the smoothing capacitor to the first winding set and torque generated by current flowing from the capacitor to the second winding set are cancelled out with each other.Type: ApplicationFiled: August 24, 2016Publication date: September 12, 2019Applicant: Mitsubishi Electric CorporationInventors: Akira FURUKAWA, Munenori YAMAMOTO
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Publication number: 20190267925Abstract: When a switching device cutoff failure determination unit determines a failure in a switching device cutoff switching unit, output torque produced based on the first armature winding and output torque produced based on the second armature winding are produced in such a way that the respective directions thereof are opposite to each other.Type: ApplicationFiled: November 16, 2016Publication date: August 29, 2019Applicant: Mitsubishi Electric CorporationInventors: Akira FURUKAWA, Munenori YAMAMOTO
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Publication number: 20190260327Abstract: To provide a controller for a rotary machine which can simplify a configuration required for checking the shutoff function of the switching device, and an electric power steering apparatus therewith. A controller for a rotary machine performs a high potential side forcible shutoff which forcibly shuts off a high potential side switching device of a diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes positive, or a low potential side forcible shutoff which forcibly shuts off a low potential side switching device of the diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes negative; and determines failure of the device shutoff unit based on a detection value of current or voltage when performing the high potential side forcible shutoff or the low potential side forcible shutoff.Type: ApplicationFiled: November 14, 2016Publication date: August 22, 2019Applicant: Mitsubishi Electric CorporationInventors: Akira FURUKAWA, Tatsuya MORI, Munenori YAMAMOTO
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Publication number: 20190073256Abstract: An abnormality determination means performs detection of abnormality of one of the pairs of detection means at a normal speed, and performs detection of abnormality of the other of the pairs at a speed not higher than the normal speed, and, when a sign of abnormality of the detection means is detected at the normal speed, a CPU performs switching to the other normal pair and continues control, and the abnormality determination means performs detection of abnormality of the other normal pair at the normal speed, and meanwhile, continues to perform detection of abnormality of the abnormal pair at a speed not higher than the normal speed.Type: ApplicationFiled: May 24, 2016Publication date: March 7, 2019Applicant: Mitsubishi Electric CorporationInventors: Eiji IWAMI, Munenori YAMAMOTO
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FAILURE DETERMINATION DEVICE FOR ANGLE DETECTOR OF ROTATING MACHINE AND FAILURE DETERMINATION METHOD
Publication number: 20190074780Abstract: A failure determination device for an angle detector for a rotating machine, including: an angle detector, which includes n pole pairs (n>m), and outputs sine and cosine wave-signals in accordance with a rotational position of a rotating machine including a multi-phase winding and m pole pairs (m?2); and a failure determiner for detecting failure of the detector based on signals from the detector. The detector outputs first and second sine-wave-signals having 180° phases different, and first and second cosine-wave-signals having 180° phases different. The failure determiner determines malfunction of the detector when the failure is determined with use of at least one of: failure determination using a sum of the first and second sine-wave-signals and a sum of the first and second cosine-wave-signals; or failure determination using a sum of squares or a square root of a sum of squares of the sine-wave-signal and the cosine-wave-signal.Type: ApplicationFiled: April 28, 2016Publication date: March 7, 2019Applicant: Mitsubishi Electric CorporationInventors: Akira FURUKAWA, Yu KAWANO, Munenori YAMAMOTO -
Patent number: 10071761Abstract: A first-stage phase compensator, a second-stage phase compensator, and a third-stage phase compensator are configured in such a way that a frequency at which a phase calculated through the transfer function of the first-stage phase compensator becomes maximal and a frequency at which a phase calculated through a transfer function of the first-stage phase compensator and the third-stage phase compensator becomes maximal coincide with each other; a motor for generating assist torque is controlled, based on a torque signal to which the first-stage phase compensator, the second-stage phase compensator, and the third-stage phase compensator have applied phase compensation.Type: GrantFiled: April 21, 2014Date of Patent: September 11, 2018Assignee: Mitsubishi Electric CorporationInventors: Munenori Yamamoto, Tomoya Iida, Yosuke Ayukawa
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Publication number: 20180037252Abstract: In an electric power steering device, if a semiconductor switching element is used between a battery and a bridge circuit for opening and closing a current path, this arises a problem of generation of heat by an ON resistance; for this reason, a current flowing through the semiconductor switching element is limited if a difference between the gate voltage and the source voltage of the semiconductor switching element is smaller than or equal to a predetermined value.Type: ApplicationFiled: April 13, 2015Publication date: February 8, 2018Applicant: Mitsubishi Electric CorporationInventors: Munenori YAMAMOTO, Hiroshi NISHIMURA