Patents by Inventor Eigo Kishimoto
Eigo Kishimoto 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: 11942889Abstract: A first torque calculation unit 114 calculates torque TQ_DC currently generated by a motor 106 based on a DC current DC1. A second torque calculation unit 115 calculates torque TQ_UVW currently generated by the motor 106 based on U-phase, V-phase, and W-phase currents. A torque limit calculation unit 116 calculates a torque limit TQ_LMT1 using a torque limit characteristic map measured in advance based on a current limit DC_LMT1. A torque limit correction unit 117 compares first torque TQ_DC with second torque TQ_UVW to calculate a torque variation degree KP1. Then, the torque limit TQ_LMT1 is corrected using the variation degree KP1 to calculate a torque limit TQ_LMT2. As a result, even if required torque reaches the torque limit, the DC current does not exceed the current limit, and the output of the motor can be fully utilized by approaching the current limit.Type: GrantFiled: December 12, 2019Date of Patent: March 26, 2024Assignee: Hitachi Astemo, Ltd.Inventors: Shinyu Ko, Kohei Myoen, Eigo Kishimoto
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Publication number: 20230155529Abstract: There is provided a synchronous machine control device capable of improving the performance of a motor without complicating a control system. The synchronous machine control device controls a power converter (2) that supplies electric power to a synchronous machine (1). The synchronous machine control device includes a first magnetic flux command computation unit (21) that computes a first magnetic flux command value (?d*, ?q*) from a current command value (Id*, Iq*) of the synchronous machine (1), a magnetic flux estimation unit (23) that estimates a magnetic flux value (?dc, ?qc) of the synchronous machine (1) from a current detection value (Idc, Iqc) of the synchronous machine (1), and a voltage computation unit (19) that creates a voltage command value (Vd*, Vq*) of the power converter such that the first magnetic flux command value (?d*, ?q*) coincides with the magnetic flux value (?dc, ?qc).Type: ApplicationFiled: December 28, 2020Publication date: May 18, 2023Applicant: Hitachi Astemo, Ltd.Inventors: Shun TANIGUCHI, Kazuaki TOBARI, Noriya NAKAO, Toshiyuki AJIMA, Kenichi YOSHIDA, Kentaro MATSUO, Eigo KISHIMOTO
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Publication number: 20220077795Abstract: A first torque calculation unit 114 calculates torque TQ_DC currently generated by a motor 106 based on a DC current DC1. A second torque calculation unit 115 calculates torque TQ_UVW currently generated by the motor 106 based on U-phase, V-phase, and W-phase currents. A torque limit calculation unit 116 calculates a torque limit TQ_LMT1 using a torque limit characteristic map measured in advance based on a current limit DC_LMT1. A torque limit correction unit 117 compares first torque TQ_DC with second torque TQ_UVW to calculate a torque variation degree KP1. Then, the torque limit TQ_LMT1 is corrected using the variation degree KP1 to calculate a torque limit TQ_LMT2. As a result, even if required torque reaches the torque limit, the DC current does not exceed the current limit, and the output of the motor can be fully utilized by approaching the current limit.Type: ApplicationFiled: December 12, 2019Publication date: March 10, 2022Applicant: Hitachi Astemo, Ltd.Inventors: Shinyu KO, Kohei MYOEN, Eigo KISHIMOTO
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Patent number: 10763754Abstract: An object of the present invention is to provide a highly efficient power supply device. A power supply device 1 according to the present invention includes a bidirectional DC-DC converter 3 and an insulated DC-DC converter 4. The bidirectional DC-DC converter 3 receives a main battery 5 and outputs a direct-current link voltage Vlink. The insulated DC-DC converter 4 receives the link voltage Vlink and supplies power to a load 7. The link voltage Vlink, which is an output of the bidirectional DC-DC converter 3, changes according to the output voltage of the insulated DC-DC converter 4.Type: GrantFiled: November 18, 2015Date of Patent: September 1, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takayuki Oouchi, Takae Shimada, Fumihiro Sato, Shintaro Tanaka, Kenji Kubo, Eigo Kishimoto
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Patent number: 10541549Abstract: An object of the present invention is to provide a charging apparatus having high efficiency of charging a battery by inputting an alternating current voltage. A charging apparatus that charges a direct current battery includes a step-down converter unit to which a direct current voltage from a power supply is input and that converts the direct current voltage, and when a voltage of the direct current battery is between a predetermined first voltage smaller than a charge completion voltage of the direct current battery and the charge completion voltage, a variable voltage that increases from the first voltage to the charge completion voltage in accordance with charging of the direct current battery is input to the step-down converter unit.Type: GrantFiled: April 27, 2016Date of Patent: January 21, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Fumihiro Sato, Takae Shimada, Takuya Ishigaki, Takayuki Ouchi, Hiroyuki Shoji, Naoya Takahashi, Eigo Kishimoto
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Patent number: 10461553Abstract: Provided is a power source device having a high efficiency. A power source device 1 includes an insulated AC-DC converter 2 which receives a voltage of an AC power source 10 and outputs a link voltage Vlink, a bidirectional DC-DC converter 3 which receives the link voltage Vlink to charge a main battery 5, an insulated DC-DC converter 4 which receives the link voltage Vlink to supply power to a load 7, an operation mode in which the power is supplied from the AC power source 10 to the main battery 5, and an operation mode in which the power is supplied from the main battery 5 to the load 7.Type: GrantFiled: March 16, 2015Date of Patent: October 29, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takae Shimada, Hiroyuki Shoji, Takayuki Oouchi, Fumihiro Sato, Kenji Kubo, Eigo Kishimoto
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Publication number: 20180166903Abstract: An object of the present invention is to provide a charging apparatus having high efficiency of charging a battery by inputting an alternating current voltage. A charging apparatus that charges a direct current battery includes a step-down converter unit to which a direct current voltage from a power supply is input and that converts the direct current voltage, and when a voltage of the direct current battery is between a predetermined first voltage smaller than a charge completion voltage of the direct current battery and the charge completion voltage, a variable voltage that increases from the first voltage to the charge completion voltage in accordance with charging of the direct current battery is input to the step-down converter unit.Type: ApplicationFiled: April 27, 2016Publication date: June 14, 2018Inventors: Fumihiro SATO, Takae SHIMADA, Takuya ISHIGAKI, Takayuki OUCHI, Hiroyuki SHOJI, Naoya TAKAHASHI, Eigo KISHIMOTO
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Publication number: 20170358987Abstract: An object of the present invention is to provide a highly efficient power supply device. A power supply device 1 according to the present invention includes a bidirectional DC-DC converter 3 and an insulated DC-DC converter 4. The bidirectional DC-DC converter 3 receives a main battery 5 and outputs a direct-current link voltage Vlink. The insulated DC-DC converter 4 receives the link voltage Vlink and supplies power to a load 7. The link voltage Vlink, which is an output of the bidirectional DC-DC converter 3, changes according to the output voltage of the insulated DC-DC converter 4.Type: ApplicationFiled: November 18, 2015Publication date: December 14, 2017Applicant: Hitachi Automotive Systems, Ltd.Inventors: Takayuki OOUCHI, Takae SHIMADA, Fumihiro SATO, Shintaro TANAKA, Kenji KUBO, Eigo KISHIMOTO
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Publication number: 20170117731Abstract: Provided is a power source device having a high efficiency. A power source device 1 includes an insulated AC-DC converter 2 which receives a voltage of an AC power source 10 and outputs a link voltage Vlink, a bidirectional DC-DC converter 3 which receives the link voltage Vlink to charge a main battery 5, an insulated DC-DC converter 4 which receives the link voltage Vlink to supply power to a load 7, an operation mode in which the power is supplied from the AC power source 10 to the main battery 5, and an operation mode in which the power is supplied from the main battery 5 to the load 7.Type: ApplicationFiled: March 16, 2015Publication date: April 27, 2017Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takae SHIMADA, Hiroyuki SHOJI, Takayuki OOUCHI, Fumihiro SATO, Kenji KUBO, Eigo KISHIMOTO
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Publication number: 20090091189Abstract: The invention is to provide an uninterruptible power supply that is able to response to diverse output specifications of DC power source units while avoiding increase of numbers of models. DC power source units 30-1 and 30-2 are placed in a container different from other container that contains an AC power source unit 20 and the AC power source unit and the DC power source unit are detachable. Further, the DC power source units 30-1 and 30-2 is provided with a setting unit that sets a condition for starting power supply in response to outside operation.Type: ApplicationFiled: October 2, 2008Publication date: April 9, 2009Inventors: Kouichi Soeda, Kouji Okano, Eigo Kishimoto, Takeshi Hashimoto