Patents by Inventor Atsuo Nishihara
Atsuo Nishihara 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).
-
Patent number: 8072760Abstract: Water paths for feeding a coolant water through a power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by a base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.Type: GrantFiled: April 14, 2010Date of Patent: December 6, 2011Assignee: Hitachi, Ltd.Inventors: Takeshi Matsuo, Haruki Hamada, Atsuo Nishihara, Masanori Musou
-
Patent number: 7983044Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: GrantFiled: January 8, 2010Date of Patent: July 19, 2011Assignee: Hitachi, Ltd.Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
-
Patent number: 7957145Abstract: An electric power converter for a vehicle, including a semiconductor element from which a motor drive current is output, a drive circuit that drives the semiconductor element, a control circuit that controls the drive circuit, a capacitor that smooths a DC current to be input to the semiconductor element, a container housing the semiconductor element, the drive circuit, the control circuit and the capacitor, a refrigerant retained in a state of vapor-liquid two-phase equilibrium within the container, and a heat exchanger unit that condenses the refrigerant in a vapor phase to be a liquid phase and exchanges heat with outside, wherein the semiconductor element, the drive circuit, the control circuit and the capacitor are disposed in a positional arrangement that will leave the semiconductor element, the drive circuit, the control circuit and the capacitor immersed in the refrigerant as the electric power converter is installed in the vehicle, and the heat exchanger unit is disposed at a side of a wall of the cType: GrantFiled: August 17, 2010Date of Patent: June 7, 2011Assignee: Hitachi, Ltd.Inventors: Osamu Suzuki, Sunao Funakoshi, Keisuke Horiuchi, Atsuo Nishihara, Yosuke Yasuda
-
Publication number: 20110049976Abstract: An electric power converter for a vehicle, including a semiconductor element from which a motor drive current is output, a drive circuit that drives the semiconductor element, a control circuit that controls the drive circuit, a capacitor that smooths a DC current to be input to the semiconductor element, a container housing the semiconductor element, the drive circuit, the control circuit and the capacitor, a refrigerant retained in a state of vapor-liquid two-phase equilibrium within the container, and a heat exchanger unit that condenses the refrigerant in a vapor phase to be a liquid phase and exchanges heat with outside, wherein the semiconductor element, the drive circuit, the control circuit and the capacitor are disposed in a positional arrangement that will leave the semiconductor element, the drive circuit, the control circuit and the capacitor immersed in the refrigerant as the electric power converter is installed in the vehicle, and the heat exchanger unit is disposed at a side of a wall of the cType: ApplicationFiled: August 17, 2010Publication date: March 3, 2011Applicant: Hitachi, Ltd.Inventors: Osamu SUZUKI, Sunao Funakoshi, Keisuke Horiuchi, Atsuo Nishihara, Yosuke Yasuda
-
Publication number: 20110032676Abstract: Water paths for feeding a coolant water through a power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by a base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.Type: ApplicationFiled: April 14, 2010Publication date: February 10, 2011Inventors: Takeshi MATSUO, Haruki Hamada, Atsuo Nishihara, Masanori Musou
-
Publication number: 20100208427Abstract: A semiconductor power module includes an insulated substrate mounting with a plurality of power semiconductor devices and a heat sink for radiating a heat generated from the plurality of power semiconductor devices, wherein the heat sink is integrally molded with a plurality of radiation fins on one surface of a planate base by forging work such that a metallic material filled into a female die of a predetermined shape is pressed by a male die of a predetermined shape, and the heat sink and the insulated substrate are bonded in metallic bonding with another surface opposite of one surface on which the radiation fins are formed with the base of the heat sink.Type: ApplicationFiled: February 17, 2010Publication date: August 19, 2010Inventors: Keisuke Horiuchi, Atsuo Nishihara, Hiroshi Hozoji, Michiaki Hiyoshi, Takehide Yokozuka
-
Publication number: 20100139997Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: ApplicationFiled: January 8, 2010Publication date: June 10, 2010Applicant: HITACHI, LTD.Inventors: Takayoshi NAKAMURA, Akihiro TAMBA, Ryuichi SAITO, Atsuo NISHIHARA
-
Patent number: 7710721Abstract: Water paths for feeding a coolant water through a power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by a base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.Type: GrantFiled: October 17, 2006Date of Patent: May 4, 2010Assignee: Hitachi, Ltd.Inventors: Takeshi Matsuo, Haruki Hamada, Atsuo Nishihara, Masanori Musou
-
Patent number: 7660122Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: GrantFiled: June 20, 2007Date of Patent: February 9, 2010Assignee: Hitachi, Ltd.Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
-
Patent number: 7516777Abstract: In an electronic apparatus having a heat-generating element therein, a cooling jacket 100 for transmitting heat generated from the heat-generating element 200 into to a liquid coolant flowing therein, comprises: a cover 130 building up a heat transfer surface to be in contact with a surface of the heat-generating element; a passage 110 for the liquid coolant, which is formed neighboring with the heat transfer surface and wound round in a “S”-like manner within an inside of a main body 120 of the cooling jacket; and an inlet 111 and an outlet 112 attached at both ends of the flow passage of the liquid coolant, and further a dispersion member 150 is disposed in the flow passage, being built up by gathering a plural number of members, each of which has a “U”-like cross-section of an aspect ratio from 10 to 20, thereby diffusing the liquid coolant therein, so as to transfer the heat from the heat-generating element thereto with high efficiency, and thereby enabling to cool down the heat-generating element, fully,Type: GrantFiled: March 31, 2006Date of Patent: April 14, 2009Assignee: Hitachi, Ltd.Inventors: Shuichi Terakado, Atsuo Nishihara, Shigeo Ohashi, Rintaro Minamitani, Takashi Naganawa
-
Publication number: 20070253164Abstract: Water paths for feeding a coolant water through a power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by a base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.Type: ApplicationFiled: October 17, 2006Publication date: November 1, 2007Inventors: Takeshi Matsuo, Haruki Hamada, Atsuo Nishihara, Masanori Musou
-
Publication number: 20070242435Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: ApplicationFiled: June 20, 2007Publication date: October 18, 2007Applicant: HITACHI, LTD.Inventors: Takayoshi NAKAMURA, Akihiro TAMBA, Ryuichi SAITO, Atsuo NISHIHARA
-
Patent number: 7252167Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: GrantFiled: June 29, 2006Date of Patent: August 7, 2007Assignee: Hitachi, Ltd.Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
-
Publication number: 20060243504Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: ApplicationFiled: June 29, 2006Publication date: November 2, 2006Applicant: HITACHI, LTD.Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
-
Publication number: 20060219388Abstract: In an electronic apparatus having a heat-generating element therein, a cooling jacket 100 for transmitting heat generated from the heat-generating element 200 into to a liquid coolant flowing therein, comprises: a cover 130 building up a heat transfer surface to be in contact with a surface of the heat-generating element; a passage 110 for the liquid coolant, which is formed neighboring with the heat transfer surface and wound round in a “S”-like manner within an inside of a main body 120 of the cooling jacket; and an inlet 111 and an outlet 112 attached at both ends of the flow passage of the liquid coolant, and further a dispersion member 150 is disposed in the flow passage, being built up by gathering a plural number of members, each of which has a “U”-like cross-section of an aspect ratio from 10 to 20, thereby diffusing the liquid coolant therein, so as to transfer the heat from the heat-generating element thereto with high efficiency, and thereby enabling to cool down the heat-generating element, fully,Type: ApplicationFiled: March 31, 2006Publication date: October 5, 2006Inventors: Shuichi Terakado, Atsuo Nishihara, Shigeo Ohashi, Rintaro Minamitani, Takashi Naganawa
-
Patent number: 7090044Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: GrantFiled: March 19, 2004Date of Patent: August 15, 2006Assignee: Hitachi, Ltd.Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
-
Patent number: 6978856Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.Type: GrantFiled: April 17, 2003Date of Patent: December 27, 2005Assignee: Hitachi, Ltd.Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
-
Publication number: 20050178526Abstract: In a cooling system of liquid type, dissolving a problem upon starting when applying a centrifugal pump therein, and being freely applicable into various kinds of electronic apparatuses, easily, for cooling a CPU in need of cooling thereof, which is mounted within a housing 100, the system comprises: a cooling jacket 50, a radiator 60 and a circulation pump, wherein the circulation pump is built up with a centrifugal pump, in which a rotor 730 having a plural number of blades formed in a centrifugal manner, a pump chamber 741 receiving the rotor in an inside thereof, and a field coil 712 of an electric motor for driving the rotor rotationally are formed into one body, and the pump chamber is disposed to located below the electric motor, thereby achieving the structure so that a liquid coolant fills up the pump chamber when stopping, in spite of the disposition of the circulation pump, thereby dissolving the problem of idling when starting.Type: ApplicationFiled: March 5, 2004Publication date: August 18, 2005Inventors: Takashi Naganawa, Rintaro Minamitani, Shigeo Ohashi, Atsuo Nishihara
-
Publication number: 20050180107Abstract: For providing an electronic apparatus, having a cooling system therein, for enabling cooling operation of a CPU 200, which is mounted within a housing 100 of the apparatus and needs cooling thereof, the cooling system for cooling the CPU has a cooling jacket 50, a radiator 60, and a circulation pump 70, wherein conduits for conducting the liquid coolant into the cooling jacket are made from a metal-made tube, and the tubes are formed into spiral-like in the configuration, or bellows are formed on the way thereof, to be freely disposable within the housing, thereby causing no obstacle in the operations when assembling the apparatus and/or making maintenance thereon.Type: ApplicationFiled: September 3, 2004Publication date: August 18, 2005Inventors: Takashi Naganawa, Rintaro Minamitani, Shigeo Ohashi, Atsuo Nishihara
-
Patent number: D556686Type: GrantFiled: October 20, 2006Date of Patent: December 4, 2007Assignee: Hitachi, Ltd.Inventors: Takeshi Matsuo, Haruki Hamada, Atsuo Nishihara, Masanori Musou