Patents by Inventor Atsushi Horikoshi
Atsushi Horikoshi 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: 11935767Abstract: A temperature control device includes: a top plate that supports a substrate; a base plate connected to the top plate so as to form an internal space with the top plate; a thermoelectric module plate arranged in the internal space; a heat exchange plate that is arranged in the internal space and exchanges heat with the thermoelectric module plate; a first coupling member that couples the top plate and the base plate via the thermoelectric module plate and the heat exchange plate and is fixed to each of the top plate and the base plate; and a second coupling member that couples the top plate and the base plate via the thermoelectric module plate and the heat exchange plate, is fixed to the top plate, and is movable relative to the base plate.Type: GrantFiled: October 30, 2019Date of Patent: March 19, 2024Assignee: Kelk Ltd.Inventors: Atsushi Kobayashi, Masato Horikoshi, Hideaki Ohkubo, Wataru Kiyosawa
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Patent number: 9634587Abstract: A motor control apparatus includes a motor current shutoff unit inserted between a multi-phase inverter circuit and a multi-phase electric motor to shut off a current for each of plural phases, the inverter circuit including an arm for each of the plural phases, a redundant arm unit including one or more arms, a connection selecting unit selecting which one of windings of the electric motor is to be connected to each of the one or more arms of the redundant arm unit, an abnormal arm detection unit detecting an abnormality in each of the plural phases of the inverter circuit, and an abnormality control unit shutting off connection between an abnormal arm and the motor when the abnormal arm detection unit detects the abnormal arm, and connecting the one or more arms of the redundant arm unit to a winding of the motor shut off.Type: GrantFiled: December 13, 2013Date of Patent: April 25, 2017Assignee: NSK Ltd.Inventors: Yusuke Kikuchi, Atsushi Horikoshi, Satoshi Ozaki, Yoshihiro Aosaki, Takeshi Senba, Hisayoshi Koiwai, Shigeo Shinohara, Kenji Mori, Masahiro Okutani, Takaaki Sekine
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Publication number: 20160134212Abstract: A motor control apparatus includes a motor current shutoff unit inserted between a multi-phase inverter circuit and a multi-phase electric motor to shut off a current for each of plural phases, the inverter circuit including an arm for each of the plural phases, a redundant arm unit including one or more arms, a connection selecting unit selecting which one of windings of the electric motor is to be connected to each of the one or more arms of the redundant arm unit, an abnormal arm detection unit detecting an abnormality in each of the plural phases of the inverter circuit, and an abnormality control unit shutting off connection between an abnormal arm and the motor when the abnormal arm detection unit detects the abnormal arm, and connecting the one or more arms of the redundant arm unit to a winding of the motor shut off.Type: ApplicationFiled: December 13, 2013Publication date: May 12, 2016Inventors: Yusuke Kikuchi, Atsushi Horikoshi, Satoshi Ozaki, Yoshihiro Aosaki, Takeshi Senba, Hisayoshi Koiwai, Shigeo Shinohara, Kenji Mori, Masahiro Okutani, Takaaki Sekine
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Patent number: 8102138Abstract: A motor control apparatus includes a steering column having inserted therein a steering shaft to which steering torque is transmitted, a reduction gear box coupled to the steering shaft, and an electric motor that transmits a steering assisting force to the steering shaft via a reduction mechanism in the reduction gear box. The electric motor and its control unit including a control board mounted with a control circuit, are provided side by side in the reduction gear box. A connection terminal of the electric motor is electrically connected to the control unit directly. This minimizes a connection distance between the control unit and the electric motor.Type: GrantFiled: April 11, 2007Date of Patent: January 24, 2012Assignee: NSK Ltd.Inventors: Takaaki Sekine, Atsushi Ooshima, Tetsuya Kodama, Seiichi Kobayashi, Yasuhiro Shimizu, Naoki Hyoudou, Shigeru Endo, Atsushi Horikoshi, Keiji Kashimoto, Tamotsu Oumi, Hideaki Kawada, Shigeo Shinohara, Takeshi Senba, Mitsuo Shimoda
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Publication number: 20100084215Abstract: A torque detector capable of achieving reduced size, a method of producing the same and an electric power steering device are provided.Type: ApplicationFiled: October 10, 2007Publication date: April 8, 2010Applicant: NSK Ltd.Inventors: Ikunori Sakatani, Atsushi Horikoshi, Atsuyoshi Asaka, Yasuhiro Kawai, Yusuke Ota
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Publication number: 20090295325Abstract: To provide an electric power steering apparatus in which it is possible to minimize a connection distance between a control unit and an electric motor and surely prevent electric noise from mixing between the control unit and the electric motor as well as to minimize electric resistance and minimize an electric loss by directly connecting the control unit and connection terminals of the electric motor and a torque sensor. A motor control apparatus includes a steering column 3 having inserted therein a steering shaft 2 to which steering torque is transmitted, a reduction gear box 4 coupled to the steering shaft 2, and an electric motor 5 that transmits a steering assisting force to the steering shaft 2 via a reduction mechanism in the reduction gear box 4.Type: ApplicationFiled: April 11, 2007Publication date: December 3, 2009Applicant: NSK Ltd.Inventors: Takaaki Sekine, Atsushi Ooshima, Tetsuya Kodama, Seiichi Kobayashi, Yasuhiro Shimizu, Naoki Hyoudou, Shigeru Endo, Atsushi Horikoshi, Keiji Kashimoto, Tamotsu Oumi, Hideaki Kawada, Shigeo Shinohara, Takeshi Senba, Mitsuo Shimoda
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Patent number: 7382295Abstract: Since an abnormality is judged by executing a square calculating process with respect to sin ? and cos ? for detecting an abnormality in an angular resolver, a processing time is elongated, and a burden to a CPU is great. Since the invention prepares a map which can judge whether the combination of sin ? and cos ? is normal or abnormal, and judges by mapping the combination of the detected sin ? and cos ?, a process can be easily executed, a processing speed is high, and a burden to the CPU can be reduced. Further, an assist can be maintained by controlling a motor by a rectangular wave current by detecting a rotation angle signal at low resolution level, such as Hall sensors arranged around the motor.Type: GrantFiled: November 1, 2004Date of Patent: June 3, 2008Assignees: NSK Ltd., NSK Steering Systems Co., Ltd.Inventors: Tetsuro Otsuka, Atsushi Horikoshi, Yuho Aoki
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Patent number: 7343254Abstract: In a resolver digital converter comprising a resolver, a resolver digital conversion part, and an excitation signal generation part, the resolver digital converter for inputting an excitation signal generated in the excitation signal generation part to the resolver and inputting resolver signals outputted from the resolver to the resolver digital conversion part, a locus in which amplitude of a sine component signal among the resolver signals sin(?), cos(?) outputted from the resolver is plotted as the ordinate axis and amplitude of a cosine component signal is plotted as the abscissa axis is approximated by a polygon and when the locus matches with sides of the approximated polygon, it is determined that the resolver is in a normal state and when the locus does not match, it is determined that the resolver is in a failure state.Type: GrantFiled: April 21, 2005Date of Patent: March 11, 2008Assignees: NSK Ltd., NSK Steering Systems Co., Ltd.Inventors: Tetsuro Otsuka, Atsushi Horikoshi, Nobuyasu Kanekawa, Shoji Sasaki
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Publication number: 20070146169Abstract: Since an abnormality is judged by executing a square calculating process with respect to sin ? and cos ? for detecting an abnormality in an angular resolver, a processing time is elongated, and a burden to a CPU is great. Since the invention prepares a map which can judge whether the combination of sin ? and cos ? is normal or abnormal, and judges by mapping the combination of the detected sin ? and cos ?, a process can be easily executed, a processing speed is high, and a burden to the CPU can be reduced. Further, an assist can be maintained by controlling a motor by a rectangular wave current by detecting a rotation angle signal at low resolution level, such as Hall sensors arranged around the motor.Type: ApplicationFiled: November 1, 2004Publication date: June 28, 2007Inventors: Tetsuro Otsuka, Atsushi Horikoshi, Yuho Aoki
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Patent number: 7042119Abstract: A linear motor includes a row of permanent magnets fixed at a position above a stator, and a plurality of magnetic pole members fixed at a position below a movable member. The row of permanent magnets is formed from N poles and S poles alternately arranged at given intervals. The plurality of magnetic pole members extend toward the row of permanent magnets and in a vertical direction and have the same height. The extremities of the magnetic pole members oppose the row of permanent magnets via an air gap. The magnetic pole members are coated with insulators, and a former-wound coil is fitted around the insulator. The part of the magnetic pole member coated with the insulator, except for the extremity thereof, is made thin by the amount corresponding to the thickness of the insulator.Type: GrantFiled: February 17, 2005Date of Patent: May 9, 2006Assignee: NSK Ltd.Inventors: Masahiro Miyashita, Atsushi Horikoshi
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Publication number: 20060066270Abstract: A controller for a motor to be mounted on a vehicle includes a boosting circuit 2 for raising the voltage of a battery that is disposed near the battery 1, a motor driving circuit 4 disposed near the motor 3 to be mounted on the vehicle for controlling the motor 3 to be mounted on the vehicle to be driven in accordance with boosted voltage outputted from the boosting circuit and a communication unit 5 disposed between the boosting circuit 2 and the motor driving circuit 4.Type: ApplicationFiled: September 22, 2005Publication date: March 30, 2006Inventors: Shin Kumagai, Shigeru Endo, Atsushi Horikoshi, Kazunobu Nagai, Masahiro Kuroda
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Publication number: 20050252272Abstract: In a resolver digital converter comprising a resolver, a resolver digital conversion part, and an excitation signal generation part, the resolver digital converter for inputting an excitation signal generated in the excitation signal generation part to the resolver and inputting resolver signals outputted from the resolver to the resolver digital conversion part, a locus in which amplitude of a sine component signal among the resolver signals sin(?), cos(?) outputted from the resolver is plotted as the ordinate axis and amplitude of a cosine component signal is plotted as the abscissa axis is approximated by a polygon and when the locus matches with sides of the approximated polygon, it is determined that the resolver is in a normal state and when the locus does not match, it is determined that the resolver is in a failure state.Type: ApplicationFiled: April 21, 2005Publication date: November 17, 2005Inventors: Tetsuro Otsuka, Atsushi Horikoshi, Nobuyasu Kanekawa, Shoji Sasaki
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Publication number: 20050151428Abstract: A linear motor includes a row of permanent magnets fixed at a position above a stator, and a plurality of magnetic pole members fixed at a position below a movable member. The row of permanent magnets is formed from N poles and S poles alternately arranged at given intervals. The plurality of magnetic pole members extend toward the row of permanent magnets and in a vertical direction and have the same height. The extremities of the magnetic pole members oppose the row of permanent magnets via an air gap. The magnetic pole members are coated with insulators, and a former-wound coil is fitted around the insulator. The part of the magnetic pole member coated with the insulator, except for the extremity thereof, is made thin by the amount corresponding to the thickness of the insulator.Type: ApplicationFiled: February 17, 2005Publication date: July 14, 2005Inventors: Masahiro Miyashita, Atsushi Horikoshi
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Patent number: 6876106Abstract: A linear motor includes a row of permanent magnets fixed at a position above a stator, and a plurality of magnetic pole members fixed at a position below a movable member. The row of permanent magnets is formed from N poles and S poles alternately arranged at given intervals. The plurality of magnetic pole members extend toward the row of permanent magnets and in a vertical direction and have the same height. The extremities of the magnetic pole members oppose the row of permanent magnets via an air gap. The magnetic pole members are coated with insulators, and a former-wound coil is fitted around the insulator. The part of the magnetic pole member coated with the insulator, except for the extremity thereof, is made thin by the amount corresponding to the thickness of the insulator.Type: GrantFiled: June 2, 2003Date of Patent: April 5, 2005Assignee: NSK Ltd.Inventors: Masahiro Miyashita, Atsushi Horikoshi
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Publication number: 20030230940Abstract: A linear motor includes a row of permanent magnets fixed at a position above a stator, and a plurality of magnetic pole members fixed at a position below a movable member. The row of permanent magnets is formed from N poles and S poles alternately arranged at given intervals. The plurality of magnetic pole members extend toward the row of permanent magnets and in a vertical direction and have the same height. The extremities of the magnetic pole members oppose the row of permanent magnets via an air gap. The magnetic pole members are coated with insulators, and a former-wound coil is fitted around the insulator. The part of the magnetic pole member coated with the insulator, except for the extremity thereof, is made thin by the amount corresponding to the thickness of the insulator.Type: ApplicationFiled: June 2, 2003Publication date: December 18, 2003Applicant: NSK LTD.Inventors: Masahiro Miyashita, Atsushi Horikoshi
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Patent number: 5914548Abstract: A sealed actuator includes a motor stator having rotation-drive magnetic poles; a motor rotor arranged so as to confront magnetic pole surfaces of the motor stator while interposing a small distance therebetween and rotatably supported through roller bearings; and displacement detecting means for measuring displacement of the motor rotor. A partition wall made of a nonmagnetic metal is disposed in a clearance between the motor stator and the motor rotor, so that the inner space where the motor stator is disposed is hermetically covered. The bearings are disposed at both sides of the partition wall in the axial direction so that the load applied to the bearings are directly received by a housing. At least a part of the partition wall is reinforced by reinforcing members and a mold agent is charged into the space on the motor stator side.Type: GrantFiled: December 27, 1996Date of Patent: June 22, 1999Assignee: NSK Ltd.Inventors: Hayao Watanabe, Atsushi Horikoshi
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Patent number: RE39748Abstract: A sealed actuator includes a motor stator having rotation-drive magnetic poles; a motor rotor arranged so as to confront magnetic pole surfaces of the motor stator while interposing a small distance therebetween and rotatably supported through roller bearings; and displacement detecting means for measuring displacement of the motor rotor. A partition wall made of a nonmagnetic metal is disposed in a clearance between the motor stator and the motor rotor, so that the inner space where the motor stator is disposed is hermetically covered. The bearings are disposed at both sides of the partition wall in the axial direction so that the load applied to the bearings are directly received by a housing. At least a part of the partition wall is reinforced by reinforcing members and a mold agent is charged into the space on the motor stator side.Type: GrantFiled: June 22, 2001Date of Patent: July 31, 2007Assignee: NSK, Ltd.Inventors: Hayao Watanabe, Atsushi Horikoshi