Patents by Inventor Shigeyuki Yoshihara
Shigeyuki Yoshihara 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: 9896822Abstract: A hybrid construction machine which can improve temperature control efficiency of an electrical storage device. It includes an engine 1, an assisting electricity generation motor 2 which performs assistance of power for the engine 1 and electricity generation and an electrical storage device 8 which performs transfer of electric power with this assisting electricity generation motor 2. The electrical storage device 8 includes a plurality of battery cells 200, a housing 220 which covers the plurality of battery cells 200 in a state of leaving them separated, a cooling plate 203 which is attached to this housing 220 and performs heat exchange with the plurality of battery cells 200, and a projection 214 which is interposed between the housing 220 and the cooling plate 203 and hinders heat transfer between the housing 220 and the cooling plate 203.Type: GrantFiled: January 19, 2015Date of Patent: February 20, 2018Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Ryuji Kohno, Ken Takeuchi, Shigeyuki Yoshihara
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Patent number: 9828749Abstract: To provide a hybrid wheel loader capable of reliably detecting a short-circuited state of a synchronous generator driven by a drive source. The present invention is provided with an MG 4 being a synchronous generator driven as an electric generator by an engine and operated as a motor by the electric power supplied from an electrical storage device 9, an MG inverter 5 having a motor current sensor 5d for detecting motor current flowing through the MG 4 and semiconductor switches 5a, 5b, and an HCU 10 for detecting a short-circuited state of the MG 4, wherein the HCU 10 determines that the MG 4 is in a short-circuited state when the semiconductor switches 5a, 5b of the MG inverter 5 are in an OFF state at gates and when the motor current detected by the motor current sensor 5d is equal to or greater than a specified threshold value.Type: GrantFiled: February 27, 2015Date of Patent: November 28, 2017Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Tomonori Takada, Shigeyuki Yoshihara, Toshihiko Ishida, Nobuyoshi Takahashi, Naoya Kawakami
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Patent number: 9731624Abstract: An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver circuit the PWM signal for controlling the driving of the motor, a parking brake, and a parking brake condition detector that detects the condition of the parking brake. When it is detected that the parking brake has been operated, the pre-driver circuit cuts off the output of the gate signal or the input of the PWM signal to the pre-driver circuit.Type: GrantFiled: September 15, 2016Date of Patent: August 15, 2017Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Yuichiro Morita, Shigeyuki Yoshihara, Kazuo Ishida, Noritaka Ito, Hirofumi Shimada
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Patent number: 9611624Abstract: An electric power storage device (19) disposed on a revolving frame (6) located closer to an upstream side in a flow direction of cooling air (F) than a heat exchanger (18) is provided on an upper revolving structure (4). The electric power storage device (19) has a box-shaped casing (20) forming an outer wall and a battery module (29) provided in the casing (20) and accommodating an electrolyte. An electrolyte discharge pipe (30) for discharging an electrolyte mist and/or electrolyte injected out of the battery module (29) at abnormality of the battery module (29) to an outside of the upper revolving structure (4) is provided on the casing (20).Type: GrantFiled: May 13, 2015Date of Patent: April 4, 2017Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Ken Takeuchi, Shinichiro Yoshida, Itaru Naya, Shigeyuki Yoshihara
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Publication number: 20170001539Abstract: An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver circuit the PWM signal for controlling the driving of the motor, a parking brake, and a parking brake condition detector that detects the condition of the parking brake. When it is detected that the parking brake has been operated, the pre-driver circuit cuts off the output of the gate signal or the input of the PWM signal to the pre-driver circuit.Type: ApplicationFiled: September 15, 2016Publication date: January 5, 2017Inventors: Yuichiro MORITA, Shigeyuki YOSHIHARA, Kazuo ISHIDA, Noritaka ITO, Hirofumi SHIMADA
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Patent number: 9457688Abstract: An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver circuit the PWM signal for controlling the driving of the motor, a parking brake, and a parking brake condition detector that detects the condition of the parking brake. When it is detected that the parking brake has been operated, the pre-driver circuit cuts off the output of the gate signal or the input of the PWM signal to the pre-driver circuit.Type: GrantFiled: September 6, 2013Date of Patent: October 4, 2016Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Yuichiro Morita, Shigeyuki Yoshihara, Kazuo Ishida, Noritaka Ito, Hirofumi Shimada
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Publication number: 20160222631Abstract: Provided is a hybrid construction machine which can improve temperature control efficiency of an electrical storage device. It includes an engine 1, an assisting electricity generation motor 2 which performs assistance of power for the engine 1 and electricity generation and an electrical storage device 8 which performs transfer of electric power with this assisting electricity generation motor 2. The electrical storage device 8 includes a plurality of battery cells 200, a housing 220 which covers the plurality of battery cells 200 in a state of leaving them separated, a cooling plate 203 which is attached to this housing 220 and performs heat exchange with the plurality of battery cells 200, and a projection 214 which is interposed between the housing 220 and the cooling plate 203 and hinders heat transfer between the housing 220 and the cooling plate 203.Type: ApplicationFiled: January 19, 2015Publication date: August 4, 2016Inventors: Ryuji KOHNO, Ken TAKEUCHI, Shigeyuki YOSHIHARA
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Publication number: 20160194855Abstract: To provide a hybrid wheel loader capable of reliably detecting a short-circuited state of a synchronous generator driven by a drive source. The present invention is provided with an MG 4 being a synchronous generator driven as an electric generator by an engine and operated as a motor by the electric power supplied from an electrical storage device 9, an MG inverter 5 having a motor current sensor 5d for detecting motor current flowing through the MG 4 and semiconductor switches 5a, 5b, and an HCU 10 for detecting a short-circuited state of the MG 4, wherein the HCU 10 determines that the MG 4 is in a short-circuited state when the semiconductor switches 5a, 5b of the MG inverter 5 are in an OFF state at gates and when the motor current detected by the motor current sensor 5d is equal to or greater than a specified threshold value.Type: ApplicationFiled: February 27, 2015Publication date: July 7, 2016Inventors: Tomonori TAKADA, Shigeyuki YOSHIHARA, Toshihiko ISHIDA, Nobuyoshi TAKAHASHI, Naoya KAWAKAMI
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Publication number: 20150345110Abstract: An electric power storage device (19) disposed on a revolving frame (6) located closer to an upstream side in a flow direction of cooling air (F) than a heat exchanger (18) is provided on an upper revolving structure (4). The electric power storage device (19) has a box-shaped casing (20) forming an outer wall and a battery module (29) provided in the casing (20) and accommodating an electrolyte. An electrolyte discharge pipe (30) for discharging an electrolyte mist and/or electrolyte injected out of the battery module (29) at abnormality of the battery module (29) to an outside of the upper revolving structure (4) is provided on the casing (20).Type: ApplicationFiled: May 13, 2015Publication date: December 3, 2015Inventors: Ken TAKEUCHI, Shinichiro YOSHIDA, Itaru NAYA, Shigeyuki YOSHIHARA
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Publication number: 20150224895Abstract: An electric driving wheel type work vehicle has a traveling motor 21, an inverter 313 for supplying the motor with three-phase power converted from DC power, a pre-driver circuit 312 for supplying a gate signal 316 to the inverter 313 on the basis of an input PWM signal, a controller 311 for outputting to the pre-driver circuit the PWM signal 315 for controlling the driving of the motor 21, parking brake means 10, and parking brake condition detection means 12 that detects the condition of the parking brake means 10. When the parking brake condition detection means 12 detects the parking brake means 10 has been operated, the pre-driver circuit 312 cuts off the output of the gate signal 316, or the input of the PWM to the pre-driver circuit 312 is cut off.Type: ApplicationFiled: September 6, 2013Publication date: August 13, 2015Inventors: Yuichiro Morita, Shigeyuki Yoshihara, Kazuo Ishida, Noritaka Ito, Hirofumi Shimada
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Patent number: 8912756Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: GrantFiled: December 26, 2012Date of Patent: December 16, 2014Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Publication number: 20140340042Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: ApplicationFiled: December 26, 2012Publication date: November 20, 2014Applicant: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko EMORI, Shigeyuki YOSHIHARA, Kazuyoshi SASAZAWA, Tatsuo HORIBA, Akihiko KUDO
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Patent number: 8884584Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: GrantFiled: December 26, 2012Date of Patent: November 11, 2014Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Patent number: 8791668Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: GrantFiled: December 21, 2012Date of Patent: July 29, 2014Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Patent number: 8786256Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: GrantFiled: December 21, 2012Date of Patent: July 22, 2014Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Patent number: 8547041Abstract: A power conversion device comprises a power conversion unit of a three phase full bridge type including upper arm switching devices and lower arm switching devices, and a controller that outputs drive signals to these switching devices. This power conversion device forms alternately a first interval in which the upper arm switching devices and the lower arm switching devices are switched to ON for different phases, and a second interval in which, for all phases, either the upper arm switching devices or the lower arm switching devices are switched to ON, according to electrical angle.Type: GrantFiled: July 29, 2010Date of Patent: October 1, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kimihisa Furukawa, Hideki Miyazaki, Shigeyuki Yoshihara, Yuichiro Takamune
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Publication number: 20130214740Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: ApplicationFiled: December 21, 2012Publication date: August 22, 2013Applicant: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko EMORI, Shigeyuki YOSHIHARA, Kazuyoshi SASAZAWA, Tatsuo HORIBA, Akihiko KUDO
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Publication number: 20130207609Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: ApplicationFiled: December 26, 2012Publication date: August 15, 2013Applicant: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko EMORI, Shigeyuki YOSHIHARA, Kazuyoshi SASAZAWA, Tatsuo HORIBA, Akihiko KUDO
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Publication number: 20130119936Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: ApplicationFiled: December 26, 2012Publication date: May 16, 2013Applicant: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko EMORI, Shigeyuki YOSHIHARA, Kazuyoshi SASAZAWA, Tatsuo HORIBA, Akihiko KUDO
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Patent number: 8339099Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: GrantFiled: March 31, 2009Date of Patent: December 25, 2012Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo