Patents by Inventor Kaname Sasaki
Kaname Sasaki 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: 10903736Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: GrantFiled: July 22, 2019Date of Patent: January 26, 2021Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Youhei Nishizawa, Kaname Sasaki, Yutaka Okubo, Yuki Fujita
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Publication number: 20200007026Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: ApplicationFiled: July 22, 2019Publication date: January 2, 2020Applicant: Hitachi Automotive Systems, Ltd.Inventors: Youhei NISHIZAWA, Kaname SASAKI, Yutaka OKUBO, Yuki FUJITA
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Patent number: 10461656Abstract: An object of the invention is to provide a power conversion device which secures insulation and is miniaturized still more without being affected by electromagnetic noises. A power conversion device according to the invention includes a power semiconductor module which converts a DC current into an AC current and includes a DC positive terminal and a DC negative terminal, and a resin cover portion which includes an insulating portion disposed between the DC positive terminal and the DC negative terminal. The cover portion holds a metal member which covers the DC positive terminal and the DC negative terminal.Type: GrantFiled: September 18, 2015Date of Patent: October 29, 2019Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yutaka Okubo, Kaname Sasaki, Satoru Shigeta, Kenichirou Nakajima
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Patent number: 10404156Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: GrantFiled: December 6, 2018Date of Patent: September 3, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Youhei Nishizawa, Kaname Sasaki, Yutaka Okubo, Yuki Fujita
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Publication number: 20190109532Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: ApplicationFiled: December 6, 2018Publication date: April 11, 2019Applicant: Hitachi Automotive Systems, Ltd.Inventors: Youhei NISHIZAWA, Kaname SASAKI, Yutaka OKUBO, Yuki FUJITA
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Patent number: 10181783Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: GrantFiled: January 2, 2018Date of Patent: January 15, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Youhei Nishizawa, Kaname Sasaki, Yutaka Okubo, Yuki Fujita
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Publication number: 20180123445Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: ApplicationFiled: January 2, 2018Publication date: May 3, 2018Applicant: Hitachi Automotive Systems, Ltd.Inventors: Youhei NISHIZAWA, Kaname SASAKI, Yutaka OKUBO, Yuki FUJITA
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Patent number: 9893603Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: GrantFiled: May 11, 2015Date of Patent: February 13, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Youhei Nishizawa, Kaname Sasaki, Yutaka Okubo, Yuki Fujita
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Patent number: 9831799Abstract: A power converter device includes first through third semiconductor modules provided for phases of a three-phase inverter circuit, and incorporating upper and lower arms series circuit, and a flow path forming cabinet in a rectangular prism shape having an electric equipment containing space and a coolant flow path formed to surround the electric equipment containing space, the coolant flow path includes a first flow path provided along a first side face of the flow path forming cabinet, a second flow path provided along a second side face contiguous to one side of the first side face and connected to one end of the first flow path, and a third flow path provided along a third side face contiguous to other side of the first side face and connected to other end of the first flow path.Type: GrantFiled: June 21, 2011Date of Patent: November 28, 2017Assignee: Hitachi Automotive-Systems, Ltd.Inventors: Shuichi Shinohara, Kenichiro Nakajima, Kaname Sasaki
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Publication number: 20170222570Abstract: An object of the invention is to provide a power conversion device which secures insulation and is miniaturized still more without being affected by electromagnetic noises. A power conversion device according to the invention includes a power semiconductor module which converts a DC current into an AC current and includes a DC positive terminal and a DC negative terminal, and a resin cover portion which includes an insulating portion disposed between the DC positive terminal and the DC negative terminal. The cover portion holds a metal member which covers the DC positive terminal and the DC negative terminal.Type: ApplicationFiled: September 18, 2015Publication date: August 3, 2017Inventors: Yutaka OKUBO, Kaname SASAKI, Satoru SHIGETA, Kenichirou NAKAJIMA
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Patent number: 9667040Abstract: Inductance is reduced while high insulation reliability between positive and negative electrodes of a DC bus bar is ensured. The DC bus bar 801a (801b) is held; the bus bar 801a (801b) is fixed by an insulating member 802a (802b) having an insulating property, with one surface 14 (15) of the bus bar 801a (801b) exposed; the bus bar 801a is arranged such that the surface 14 of the bus bar 801a faces the surface 15 of the second bus bar 801b; an insulating sheet 803 is held between the bus bar 801a and the bus bar 801b; the first insulating member 802a has a projecting part 804a projecting toward the second insulating member 802b; and the projecting part 804a has, at an end part thereof, an abutting surface 13 in contact with the second insulating member 802b.Type: GrantFiled: September 24, 2014Date of Patent: May 30, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yuki Fujita, Kaname Sasaki, Kenichirou Nakajima
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Publication number: 20170063218Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.Type: ApplicationFiled: May 11, 2015Publication date: March 2, 2017Applicant: Hitachi Automotive Systems, Ltd.Inventors: Youhei NISHIZAWA, Kaname SASAKI, Yutaka OKUBO, Yuki FUJITA
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Patent number: 9526194Abstract: A power conversion device includes a power semiconductor module that converts DC current into AC current, a capacitor for smoothing DC power, a first flow conduit defining member for defining a first flow conduit and for defining a first storage space in which the power semiconductor module is housed, and a second flow conduit defining member for defining a second flow conduit and for defining a second storage space in which the capacitor is housed. A first space, in which a vehicle component that is different from the power conversion device is disposed, is defined in a space to the side of the first flow conduit defining member and below the second flow conduit defining member.Type: GrantFiled: October 2, 2013Date of Patent: December 20, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yuki Fujita, Kenichiro Nakajima, Kaname Sasaki
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Publication number: 20160268782Abstract: Inductance is reduced while high insulation reliability between positive and negative electrodes of a DC bus bar is ensured. The DC bus bar 801a (801b) is held; the bus bar 801a (801b) is fixed by an insulating member 802a (802b) having an insulating property, with one surface 14 (15) of the bus bar 801a (801b) exposed; the bus bar 801a is arranged such that the surface 14 of the bus bar 801a faces the surface 15 of the second bus bar 801b; an insulating sheet 803 is held between the bus bar 801a and the bus bar 801b; the first insulating member 802a has a projecting part 804a projecting toward the second insulating member 802b; and the projecting part 804a has, at an end part thereof, an abutting surface 13 in contact with the second insulating member 802b.Type: ApplicationFiled: September 24, 2014Publication date: September 15, 2016Inventors: Yuki FUJITA, Kaname SASAKI, Kenichirou NAKAJIMA
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Publication number: 20150245535Abstract: A power conversion device that can be made smaller without degradation of its cooling performance is provided. This power conversion device includes a power semiconductor module that converts DC current into AC current, a capacitor for smoothing DC power, a first flow conduit defining member for defining a first flow conduit and for defining a first storage space in which the power semiconductor module is housed, and a second flow conduit defining member for defining a second flow conduit and for defining a second storage space in which the capacitor is housed.Type: ApplicationFiled: October 2, 2013Publication date: August 27, 2015Inventors: Yuki Fujita, Kenichiro Nakajima, Kaname Sasaki
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Publication number: 20140140119Abstract: A power inverter includes a plurality of power modules; a first casing housing the power modules and a cooling path in which a coolant flows is formed; a plurality of AC busbars connected to AC terminals of the power modules; a holding member, in which a positioning pin protruding to an upper side in a direction opposite to the first casing is formed, that maintains the AC busbars and is fixed to the first casing; a current sensor module including a plurality of current sensors detecting the AC currents of the AC busbars; a frame body for maintaining the current sensors, and a lead terminal protruding from the frame body to the upper side; and a driver circuit board, in which a through-hole used for the lead terminal and a board positioning through-hole are formed, arranged on the upper side of the frame body arranged on the holding member.Type: ApplicationFiled: July 9, 2012Publication date: May 22, 2014Applicant: Hitachi Automotive Systems, Ltd.Inventors: Shuichi Shinohara, Kenichiro Nakajima, Kaname Sasaki
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Publication number: 20130128643Abstract: A power converter device includes first through third semiconductor modules provided for phases of a three-phase inverter circuit, and incorporating upper and lower arms series circuit, and a flow path forming cabinet in a rectangular prism shape having an electric equipment containing space and a coolant flow path formed to surround the electric equipment containing space, the coolant flow path includes a first flow path provided along a first side face of the flow path forming cabinet, a second flow path provided along a second side face contiguous to one side of the first side face and connected to one end of the first flow path, and a third flow path provided along a third side face contiguous to other side of the first side face and connected to other end of the first flow path.Type: ApplicationFiled: June 21, 2011Publication date: May 23, 2013Applicant: Hitachi Automotive Systems, Ltd.Inventors: Shuichi Shinohara, Kenichiro Nakajima, Kaname Sasaki
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Patent number: 7254211Abstract: An apparatus for performing computed tomography having a radiation source and at least one radiation detector spaced from the radiation source and which generates an output signal representative of the strength of the received radiation from the radiation source. A part support for holding a plurality of parts is positioned in between the radiation source and the detectors. The part support is rotatably mounted about an axis generally perpendicular to a vector between the radiation source and the detectors so that, upon rotation of the part support, the radiation detectors generate an output signal corresponding to the internal structure of parts supported on the part support. A computer system receives the output signals from the detectors and, under program control, generates a report of the internal structure of the parts on the part support.Type: GrantFiled: September 14, 2004Date of Patent: August 7, 2007Assignee: Hitachi, Ltd.Inventors: Frank Hunt, Kaname Sasaki, Shigeru Oho
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Publication number: 20060056577Abstract: An apparatus for performing computed tomography having a radiation source and at least one radiation detector spaced from the radiation source and which generates an output signal representative of the strength of the received radiation from the radiation source. A part support for holding a plurality of parts is positioned in between the radiation source and the detectors. The part support is rotatably mounted about an axis generally perpendicular to a vector between the radiation source and the detectors so that, upon rotation of the part support, the radiation detectors generate an output signal corresponding to the internal structure of parts supported on the part support. A computer system receives the output signals from the detectors and, under program control, generates a report of the internal structure of the parts on the part support.Type: ApplicationFiled: September 14, 2004Publication date: March 16, 2006Inventors: Frank Hunt, Kaname Sasaki, Shigeru Oho
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Patent number: 6889516Abstract: A cooling system for a motor is prevented from exhibiting a thermal fatigue failure due to a temperature cycle. The operation or stopping of the cooling motor fan 6 of the forced cooling system is controlled using the difference between the temperature thereof and the operation start temperature Tis of the power converter 3. Thus expansion of the temperature range is suppressed.Type: GrantFiled: July 24, 2003Date of Patent: May 10, 2005Assignee: Hitachi, Ltd.Inventors: Kaname Sasaki, Hiroaki Doi, Haruki Hamada, Masaaki Hayashi, Ryuichi Saito