Patents by Inventor Kazuhisa Takashima
Kazuhisa Takashima 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: 11831209Abstract: Provided are a motor control device including: a motor case including a motor; a housing, which is provided to have a power supply connector mounted thereon and cover an upper portion of the motor case; and a control unit, which is arranged on a side opposite to an output side on an output shaft of the motor in a space formed by the motor case and the housing, and an electric power steering control device. The control unit includes a filter portion, which is arranged in an upper portion of the control unit and is connected to the power supply connector, a control board, which is arranged below the filter portion and has mounted thereon circuit components configured to supply an electric current to the motor, and a shield plate, which is arranged between the filter portion and the control board and is grounded to the motor case.Type: GrantFiled: September 12, 2016Date of Patent: November 28, 2023Assignee: Mitsubishi Electric CorporationInventors: Takanori Ichikawa, Kazuhisa Takashima, Kentaro Urimoto
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Publication number: 20220291572Abstract: The in-vehicle camera comprises a lens barrel; a circuit board on which an image processing circuit is mounted, the image processing circuit performing image processing to recognize a subject from video signals; and a housing which includes an intake vent and an exhaust vent and accommodates therein the circuit board such that the image processing circuit and the lens barrel are away from each other in the left-right direction. The in-vehicle camera is configured such that a ventilation passage connecting the intake vent and an exhaust vent is formed between an inner face on a side of the installation face of the housing and the circuit board in a path that is away from the lens barrel and passes through a region in which the image processing circuit is disposed.Type: ApplicationFiled: September 25, 2019Publication date: September 15, 2022Applicant: Mitsubishi Electric CorporationInventors: Tetsuya OBA, Kazuhisa TAKASHIMA
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Patent number: 10734869Abstract: The present invention is concerning the control device equipped with a motor 2 and a control unit 1 which is coaxial to the motor 2. An upper frame 40 is arranged at a boundary between the motor 2 and the control unit 1. A semiconductor module 35, an intermediate member 50, and a control board 3 are provided in the control unit 1. For assembly of the semiconductor module 35 and the intermediate member 50, a latch portion 35f is provided on one of the semiconductor module 35 and the intermediate member 50, and an engaged portion into which the latch portion 35f locks is provided on the other of the semiconductor module 35 and the intermediate member 50, whereby positioning of the semiconductor module 35 and the intermediate member 50 is achieved.Type: GrantFiled: April 27, 2015Date of Patent: August 4, 2020Assignee: Mitsubishi Electric CorporationInventors: Takahisa Kawaguchi, Kazuhisa Takashima
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Publication number: 20190207488Abstract: Provided are a motor control device including: a motor case including a motor; a housing, which is provided to have a power supply connector mounted thereon and cover an upper portion of the motor case; and a control unit, which is arranged on a side opposite to an output side on an output shaft of the motor in a space formed by the motor case and the housing, and an electric power steering control device. The control unit includes a filter portion, which is arranged in an upper portion of the control unit and is connected to the power supply connector, a control board, which is arranged below the filter portion and has mounted thereon circuit components configured to supply an electric current to the motor, and a shield plate, which is arranged between the filter portion and the control board and is grounded to the motor case.Type: ApplicationFiled: September 12, 2016Publication date: July 4, 2019Applicant: Mitsubishi Electric CorporationInventors: Takanori ICHIKAWA, Kazuhisa TAKASHIMA, Kentaro URIMOTO
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Patent number: 10075036Abstract: The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.Type: GrantFiled: September 20, 2012Date of Patent: September 11, 2018Assignee: Mitsubishi Electric CorporationInventors: Akihiko Morikawa, Kazuhisa Takashima, Toshihiro Matsunaga, Masayuki Miyaoka, Akihiro Yamamura, Hiroki Maeda
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Publication number: 20180123431Abstract: The present invention is concerning the control device equipped with a motor 2 and a control unit 1 which is coaxial to the motor 2. An upper frame 40 is arranged at a boundary between the motor 2 and the control unit 1. A semiconductor module 35, an intermediate member 50, and a control board 3 are provided in the control unit 1. For assembly of the semiconductor module 35 and the intermediate member 50, a latch portion 35f is provided on one of the semiconductor module 35 and the intermediate member 50, and an engaged portion into which the latch portion 35f locks is provided on the other of the semiconductor module 35 and the intermediate member 50, whereby positioning of the semiconductor module 35 and the intermediate member 50 is achieved.Type: ApplicationFiled: April 27, 2015Publication date: May 3, 2018Applicant: Mitsubishi Electric CorporationInventors: Takahisa KAWAGUCHI, Kazuhisa TAKASHIMA
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Patent number: 9899891Abstract: The connection terminal and the power supply terminal are held by a common holding member made of a resin. The power supply terminal includes a press-fitting portion press-fitted into a press-fitted portion of the holding member. The press-fitted portion of the holding member has a shape that is long in a plate width direction of the power supply terminal and short in a plate thickness direction of the power supply terminal. Assuming that a dimension of each of both end portions of the press-fitted portion in the plate width direction of the power supply terminal is defined as L1, a dimension of a center portion of the press-fitted portion is defined as L2, and a plate thickness of the power supply terminal is defined as T, L2<T<L1 is satisfied under a non-press-fitted state.Type: GrantFiled: November 19, 2013Date of Patent: February 20, 2018Assignee: Mitsubishi Electric CorporationInventors: Kazuki Sawada, Kazuhisa Takashima, Hideya Nishikawa, Yusuke Funabiki
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Patent number: 9608493Abstract: In a rotary electric machine including a stator and a rotor, the stator includes: a connected core (1) composed of a plurality of cores in which a first core (1b) and a second core (1c) are paired to connect in a belt shape to be rounded into a substantially cylindrical shape by being folded at a core connecting portion (1d) so as to surround the rotor; a plurality of coils in which a first coil (3f) and a second coil (3g) are paired; and a crossover wire (3c) which connects the winding end (3b) of the first coil (3f) to the winding start (3d) of the second coil (3g). The crossover wire (3c) are arranged on the inner diameter side than the core connecting portion (1d).Type: GrantFiled: September 22, 2010Date of Patent: March 28, 2017Assignee: Mitsubishi Electric CorporationInventors: Hiromu Nonoguchi, Kazuhisa Takashima
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Patent number: 9601950Abstract: A permanent magnet motor (1) is configured such that mN?K is satisfied to an integer m, where the pole number of a rotor (3) is K and the number of divided iron cores (10-12) of a stator (2) is N, and N values of r(?), r(?+360°/N), . . . , r(?+(i?1)×360°/N), . . . , r(?+(N?1)×360°/N) are equal so that the absolute value of the difference between any two of the N values becomes up to a predetermined value, where r(?) is an inner radius defined as, on a plane perpendicular to a rotary shaft (7) of the rotor (3), a distance from the rotary shaft (7) center to a surface of the stator iron core (4) facing the rotor (3) where an angle from a fitting portion (15) of the partial iron core (10) is ? on the perpendicular plane, ? taking 0 to 360°/N.Type: GrantFiled: May 26, 2011Date of Patent: March 21, 2017Assignee: Mitsubishi Electric CorporationInventors: Akihiro Yamamura, Kazuhisa Takashima, Masatsugu Nakano
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Patent number: 9601960Abstract: An electrical machine includes a back-yoke engagement portion including a convex portion for a back yoke portion formed on an outer-diameter surface of a pair of back yoke-side coil retaining pieces and a shoe engagement portion including a convex portion for a shoe portion. By the convex portion for the back yoke portion and the convex portion for the shoe portion, the back yoke-side coil retaining pieces and shoe-side coil retaining pieces are biased toward a stator core.Type: GrantFiled: September 27, 2012Date of Patent: March 21, 2017Assignee: Mitsubishi Electric CorporationInventors: Keiji Hino, Kazuhisa Takashima, Atsushi Ichigozaki, Katsuhiko Sakamoto
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Patent number: 9391486Abstract: An electric power steering electric motor apparatus includes: an electric motor including: a motor housing; a stator; a rotor; and a power supplying portion that supplies electric power to the stator; and a controlling unit including: a driving circuit that supplies electric power to the electric motor; a connecting portion; a controlling circuit; and a case that covers the driving circuit and the controlling circuit, the electric motor and the controlling unit being mounted coaxially onto a gear housing that reduces rotational speed of the electric motor so as to position the controlling unit on a side near the gear housing, and the connecting portion being connected to the power supplying portion inside the case through an opening portion formed on the case, and being positioned and held by an insulating member so as to be insulated from the case and the motor housing.Type: GrantFiled: May 30, 2011Date of Patent: July 12, 2016Assignee: Mitsubishi Electric CorporationInventors: Atsushi Sakaue, Yoshihito Asao, Satoru Akutsu, Isao Sonoda, Kazuhisa Takashima
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Patent number: 9350204Abstract: A compact, light permanent magnet motor with low torque pulsations is obtained by reducing a cogging torque resulting from variations at the end of a rotor, such as an error in attachment position and a variation in magnet characteristic of the permanent magnets. A permanent magnet rotating electrical machine includes a rotor and a stator, a stator core provided with slots in which to store an armature winding wire wound around the teeth, and supplemental grooves provided to the teeth in portions opposing the rotor in an axial direction of the stator core. The supplemental grooves are provided to the stator in a part in the axial direction of the stator core, and that let P be the number of the magnetic poles (the number of poles) and S be the number of the slots (the number of slots), then a relation, 0.75<S/P<1.5, is established.Type: GrantFiled: November 24, 2009Date of Patent: May 24, 2016Assignee: Mitsubishi Electric CorporationInventors: Masatsugu Nakano, Toshihiro Matsunaga, Kazuhisa Takashima, Satoru Akutsu, Yusuke Morita
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Publication number: 20160079825Abstract: The connection terminal and the power supply terminal are held by a common holding member made of a resin. The power supply terminal includes a press-fitting portion press-fitted into a press-fitted portion of the holding member. The press-fitted portion of the holding member has a shape that is long in a plate width direction of the power supply terminal and short in a plate thickness direction of the power supply terminal. Assuming that a dimension of each of both end portions of the press-fitted portion in the plate width direction of the power supply terminal is defined as L1, a dimension of a center portion of the press-fitted portion is defined as L2, and a plate thickness of the power supply terminal is defined as T, L2<T<L1 is satisfied under a non-press-fitted state.Type: ApplicationFiled: November 19, 2013Publication date: March 17, 2016Applicant: Mitsubishi Electric CorporationInventors: Kazuki SAWADA, Kazuhisa TAKASHIMA, Hideya NISHIKAWA, Yusuke FUNABIKI
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Patent number: 9184637Abstract: A rotor of a rotary electric machine according to the present invention includes: a rotor core arranged on the outer circumferential side of a rotor shaft; and a plurality of magnetic poles fixed to the rotor core and circumferentially arranged on the rotor core, the rotor including a non-magnetic ring attached by insertion to the outer circumference of the plurality of the magnetic poles and having a substantially polygonal shape in outer circumferential shape. The non-magnetic ring is configured such that the inner circumferential length L of the non-magnetic ring before assembly with respect to the length of an envelope L0 of tangent lines each between the outer circumferential surface of the magnetic pole and the outer circumferential surface of the adjacent magnetic pole is set to L?L0. An object is to obtain the rotor of the rotary electric machine capable of achieving reduction in size and cost.Type: GrantFiled: June 10, 2010Date of Patent: November 10, 2015Assignee: Mitsubishi Electric CorporationInventors: Akihiro Yamamura, Kazuhisa Takashima, Hidechika Fujii, Masayuki Miyaoka, Satoru Akutsu
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Patent number: 9172278Abstract: Not less than two regions different in magnetic circuit design are provided in a rotational axis direction of the rotor (30), the regions being different by changing a cross-sectional shape in the rotational axis direction in a cross-section perpendicular to a rotational shaft (10) of the rotor (30) having the permanent magnets (1) and the rotor core (2); the supplemental grooves (5) are provided in axial partial regions of each of the teeth (7) of the stator core (3); and the region in which the supplemental groove (5) is provided is each partial region for each region facing a region same in magnetic circuit design of the rotor (30). This enables to reduce cogging torque generated by variations on the rotor side.Type: GrantFiled: September 6, 2010Date of Patent: October 27, 2015Assignee: Mitsubishi Electric CorporationInventors: Masatsugu Nakano, Toshihiro Matsunaga, Yusuke Morita, Misa Nakayama, Kazuhisa Takashima, Satoru Akutsu
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Publication number: 20150263571Abstract: Not less than two regions different in magnetic circuit design are provided in a rotational axis direction of the rotor (30), the regions being different by changing a cross-sectional shape in the rotational axis direction in a cross-section perpendicular to a rotational shaft (10) of the rotor (30) having the permanent magnets (1) and the rotor core (2); the supplemental grooves (5) are provided in axial partial regions of each of the teeth (7) of the stator core (3); and the region in which the supplemental groove (5) is provided is each partial region for each region facing a region same in magnetic circuit design of the rotor (30). This enables to reduce cogging torque generated by variations on the rotor side.Type: ApplicationFiled: May 29, 2015Publication date: September 17, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masatsugu NAKANO, Toshihiro MATSUNAGA, Yusuke MORITA, Misa NAKAYAMA, Kazuhisa TAKASHIMA, Satoru AKUTSU
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Patent number: 9054563Abstract: A motor for an electric power steering device, includes: a housing side bearing which is placed on the output side of a shaft of a rotor placed in a frame, and is supported by a housing connected to the frame; and a frame side bearing which is placed on the opposite output side of the shaft of the rotor, and is composed of an outer ring and an inner ring supported by the frame.Type: GrantFiled: February 9, 2011Date of Patent: June 9, 2015Assignee: Mitsubishi Electric CorporationInventors: Toshihiro Matsunaga, Yoshihito Asao, Satoru Akutsu, Kazuhisa Takashima
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Patent number: 9035505Abstract: Provided is a motor for an electric power steering apparatus, in which vibrations and noises are suppressed. The motor for an electric power steering apparatus includes: a motor section (1) for outputting an assist torque to a handle of a vehicle; and a controller (2) for controlling driving of the motor section (1). The motor section (1) includes: a rotor (14, 14A) having P poles; and a stator (15, 15A) provided so as to surround the rotor (14, 14A), the stator including: a stator core (23) provided with n slots formed thereon and housed in a frame (4); and three-phase stator windings (25) wound around the slots (22). The controller (2) is provided between a boss (18) and the motor section (1) so as to surround the output shaft (12).Type: GrantFiled: October 6, 2010Date of Patent: May 19, 2015Assignee: Mitsubishi Electric CorporationInventors: Satoru Akutsu, Kazuhisa Takashima, Yoshihito Asao
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Publication number: 20150048711Abstract: An electrical machine includes a back-yoke engagement portion including a convex portion for a back yoke portion formed on an outer-diameter surface of a pair of back yoke-side coil retaining pieces and a shoe engagement portion including a convex portion for a shoe portion. By the convex portion for the back yoke portion and the convex portion for the shoe portion, the back yoke-side coil retaining pieces and shoe-side coil retaining pieces are biased toward a stator core.Type: ApplicationFiled: September 27, 2012Publication date: February 19, 2015Applicant: Mitsubishi Electric CorporationInventors: Keiji Hino, Kazuhisa Takashima, Atsushi Ichigozaki, Katsuhiko Sakamoto
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Publication number: 20140265699Abstract: The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.Type: ApplicationFiled: September 20, 2012Publication date: September 18, 2014Applicant: Mitsubishi Electric CorporationInventors: Akihiko Morikawa, Kazuhisa Takashima, Toshihiro Matsunaga, Masayuki Miyaoka, Akihiro Yamamura, Hiroki Maeda