Patents by Inventor Nakaba Kataoka
Nakaba Kataoka 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: 11522405Abstract: A motor for a driving device includes a rotor rotatable around a central axis, a stator facing the rotor, a busbar electrically connected to the stator, a busbar support to hold the busbar, a terminal bar including a first end electrically connected to the busbar, the terminal bar including a connection terminal at a second end and that is to be electrically connected to the driving device, and a seal to be attached to the driving device and located between the busbar and the connection terminal. The seal portion includes a through-hole into which the terminal bar is press-fitted.Type: GrantFiled: April 15, 2020Date of Patent: December 6, 2022Assignee: NIDEC CORPORATIONInventors: Hiroshi Sambuichi, Nakaba Kataoka
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Patent number: 10763723Abstract: A motor for a driving device includes: a rotor rotatable around a central axis, a stator facing the rotor, a busbar electrically connected to the stator, a busbar support to hold the busbar, a terminal bar including a first end electrically connected to the busbar, the terminal bar including a connection terminal at a second end and that is to be electrically connected to the driving device, and a seal to be attached to the driving device and located between the busbar and the connection terminal. The seal portion includes a through-hole into which the terminal bar is press-fitted.Type: GrantFiled: July 20, 2017Date of Patent: September 1, 2020Assignees: NIDEC CORPORATION, ZF AUTOMOTIVE GERMANY GMBH, ZF AUTOMOTIVE UK LIMITEDInventors: Hiroshi Sambuichi, Nakaba Kataoka, Jochen Scherbart, Guy Healey
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Publication number: 20200244141Abstract: A motor for a driving device includes a rotor rotatable around a central axis, a stator facing the rotor, a busbar electrically connected to the stator, a busbar support to hold the busbar, a terminal bar including a first end electrically connected to the busbar, the terminal bar including a connection terminal at a second end and that is to be electrically connected to the driving device, and a seal to be attached to the driving device and located between the busbar and the connection terminal. The seal portion includes a through-hole into which the terminal bar is press-fitted.Type: ApplicationFiled: April 15, 2020Publication date: July 30, 2020Inventors: Hiroshi SAMBUICHI, Nakaba KATAOKA
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Publication number: 20190229577Abstract: A motor for a driving device includes: a rotor rotatable around a central axis, a stator facing the rotor, a busbar electrically connected to the stator, a busbar support to hold the busbar, a terminal bar including a first end electrically connected to the busbar, the terminal bar including a connection terminal at a second end and that is to be electrically connected to the driving device, and a seal to be attached to the driving device and located between the busbar and the connection terminal. The seal portion includes a through-hole into which the terminal bar is press-fitted.Type: ApplicationFiled: July 20, 2017Publication date: July 25, 2019Inventors: Hiroshi SAMBUICHI, Nakaba KATAOKA
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Patent number: 8138644Abstract: A motor includes a plurality of bus wires of a common phase which are put together before being guided in a common passage to minimize the space arranged to guide the bus wires. Also, the bus wires of a common phase are easily insulated from those of different phases, and an axial height of the motor is reduced. Further, a radial width necessary to guide the bus wires is reduced, and an axial height of the motor including a sensor portion which detects a rotary position of the motor is reduced. Also, the bus wires are easily extended from the armature, and an amount of work required to connect the bus wires and the terminals is reduced. Furthermore, the connection terminal portion does not interfere with the bus wires when they are being guided.Type: GrantFiled: July 28, 2008Date of Patent: March 20, 2012Assignee: Nidec CorporationInventors: Nakaba Kataoka, Motofumi Otsuji, Yoshiaki Yamashita
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Publication number: 20110018384Abstract: In a motor, a raised portion arranged to project toward a rotor magnet is provided on an opposed surface of each tooth portion. This raised portion provided on an opposed surface of each tooth portion. This raised portion is provided at a substantial middle of the opposed surface in a circumferential direction. This allows a waveform of a cogging torque generated by the raised portions and a fundamental of a waveform of a cogging torque generated by slot openings to be substantially in opposite phases. Cogging torque generated by the slot openings can be thereby reduced, because of the cogging torque generated by the raised portion.Type: ApplicationFiled: March 26, 2009Publication date: January 27, 2011Applicant: NIDEC CORPORATIONInventors: Takashi Kenjo, Nakaba Kataoka, Yoshihiro Uchitani, Yoshiaki Yamashita
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Publication number: 20110018376Abstract: A technique and structure for establishing a sufficient electrical connection between an armature and a power supply of a motor even for use in severe working environments through at least one busbar is such that each of the at least one busbar is connected a conductor wire arranged to supply a drive current to the armature of the motor. The structure includes a terminal plate having a through hole defined therein to allow the conductor wire to pass therethrough, and a terminal wall arranged to rise above the terminal plate from a periphery of the through hole.Type: ApplicationFiled: March 12, 2009Publication date: January 27, 2011Applicant: NIDEC CORPORATIONInventors: Nakaba Kataoka, Keita Nakanishi
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Patent number: 7868504Abstract: A resolver rotor for a variable reluctance resolver includes a plurality of axially stacked rotor pieces. The rotor pieces are jointly fitted into one body. In the fitting of the rotor pieces, deformed portions are provided between a center of the radial thickness of the resolver rotor and a side surface thereof which is opposite to a stator-side surface thereof. The number of deformed portions is the same as that of projecting poles of the resolver rotor. The deformed portions are arranged at circumferential positions of peaks of the respective projecting poles. At those positions, concave portions are provided on the side surface to receive deformations caused by fitting the rotor pieces together. Thus, the stator-side surface of the resolver rotor is less affected by fitting of the rotor pieces together, preventing a reduction in the detection accuracy of the resolver.Type: GrantFiled: April 21, 2008Date of Patent: January 11, 2011Assignee: Nidec CorporationInventors: Nakaba Kataoka, Keita Nakanishi
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Patent number: 7827673Abstract: In a resolver of a motor, a plurality of wires forming a plurality of coils arranged at a resolver stator portion are arranged at a wiring surface which is arranged at a terminal block of a connector portion and extends between an annular shape surface arranged substantially perpendicularly to a central axis at a core back of an insulator and a plurality of terminal pins, and are connected to a control unit via the terminal pins. Each of the wires of the resolver includes a slackened portion formed at a portion thereof between corresponding terminal pins and corresponding coils. The slackened portion is accommodated in a groove portion arranged at the wiring surface of the connector portion in order to minimize the possibility of damaging the wire improving reliability of the connection between the terminal pin and the coil.Type: GrantFiled: May 5, 2010Date of Patent: November 9, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Keita Nakanishi
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Patent number: 7830051Abstract: A resolver includes a terminal block having a plurality of terminals integrally formed therein. Each of the terminals has a conductive wire connecting portion arranged to allow a conductive wire of a resolver stator to be fixed thereto and a lead wire connecting portion which allows a lead wire to be connected thereto. Ultrasonic welding is carried out to join the lead wire connecting portion and a connecting end of the lead wire.Type: GrantFiled: January 10, 2008Date of Patent: November 9, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Takahiro Hattori, Keita Nakanishi
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Patent number: 7795766Abstract: A motor includes a housing having a substantially cylindrical shape accommodating therein a stator portion and a rotor portion. The housing includes a housing body having an opening at an upper side thereof, and a lid portion arranged between an armature and a sensor so as to close the opening of the housing body. Since the lid portion is made of a magnetic material and is arranged between the armature and the sensor, a magnetic effect on the sensor caused by a magnetic force generated at the armature is minimized. By virtue of such configuration in which the lid portion of the housing functions as a magnetic shield, the motor can be smaller in the axial direction compared with a configuration in which an extra layer of magnetic shield is arranged.Type: GrantFiled: February 29, 2008Date of Patent: September 14, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Takayuki Migita, Hidehiro Haga
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Publication number: 20100212143Abstract: In a resolver of a motor, a plurality of wires forming a plurality of coils arranged at a resolver stator portion are arranged at a wiring surface which is arranged at a terminal block of a connector portion and extends between an annular shape surface arranged substantially perpendicularly to a central axis at a core back of an insulator and a plurality of terminal pins, and are connected to a control unit via the terminal pins. Each of the wires of the resolver includes a slackened portion formed at a portion thereof between corresponding terminal pins and corresponding coils. The slackened portion is accommodated in a groove portion arranged at the wiring surface of the connector portion in order to minimize the possibility of damaging the wire improving reliability of the connection between the terminal pin and the coil.Type: ApplicationFiled: May 5, 2010Publication date: August 26, 2010Applicant: NIDEC CORPORATIONInventors: Nakaba KATAOKA, Keita NAKANISHI
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Publication number: 20100201213Abstract: A motor includes a plurality of bus wires of a common phase which are put together before being guided in a common passage to minimize the space arranged to guide the bus wires. Also, the bus wires of a common phase are easily insulated from those of different phases, and an axial height of the motor is reduced. Further, a radial width necessary to guide the bus wires is reduced, and an axial height of the motor including a sensor portion which detects a rotary position of the motor is reduced. Also, the bus wires are easily extended from the armature, and an amount of work required to connect the bus wires and the terminals is reduced. Furthermore, the connection terminal portion does not interfere with the bus wires when they are being guided.Type: ApplicationFiled: July 28, 2008Publication date: August 12, 2010Applicant: NIDEC CORPORATIONInventors: Nakaba Kataoka, Motofumi Otsuji, Yoshiaki Yamashita
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Patent number: 7755231Abstract: In a resolver of a motor, a plurality of wires forming a plurality of coils arranged at a resolver stator portion are arranged at a wiring surface which is arranged at a terminal block of a connector portion and extends between an annular shape surface arranged substantially perpendicularly to a central axis at a core back of an insulator and a plurality of terminal pins, and are connected to a control unit via the terminal pins. Each of the wires of the resolver includes a slackened portion formed at a portion thereof between corresponding terminal pins and corresponding coils. The slackened portion is accommodated in a groove portion arranged at the wiring surface of the connector portion in order to minimize the possibility of damaging the wire improving reliability of the connection between the terminal pin and the coil.Type: GrantFiled: January 10, 2008Date of Patent: July 13, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Keita Nakanishi
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Patent number: 7737587Abstract: A motor having a busbar unit which is accommodated in a housing along with an armature includes a relay wherein the connection between the armature and the relay is secured. By virtue of such a configuration, reliability of the connection between the armature and the relay is improved. In the busbar unit, a plurality of first busbars and a plurality of second busbars each having a substantially arcuate shape are arranged so as to be circumferentially spaced apart from one another. The first busbars do not overlap with the second busbars in the axial and radial directions thereby reducing the dimensions of the motor in the axial and radial directions.Type: GrantFiled: February 29, 2008Date of Patent: June 15, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Takayuki Migita, Hidehiro Haga
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Patent number: 7714470Abstract: A connector portion of a resolver stator includes a connecting portion to which a lead wire is connected and a guiding groove which guides the lead wire in an axial direction. The lead wire connected to the connecting portion is retained by the guiding groove and guided in the axial direction.Type: GrantFiled: September 24, 2007Date of Patent: May 11, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Keita Nakanishi, Yoshiaki Yamashita
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Patent number: 7705505Abstract: A brushless motor includes at a substantially cylindrical portion of a bracket thereof a retaining mechanism which retains a resolver stator. The resolver stator whose axial movement and circumferential movement are minimized by the retaining mechanism will be affixed to the bracket.Type: GrantFiled: September 24, 2007Date of Patent: April 27, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Keita Nakanishi, Yoshiaki Yamashita
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Patent number: 7663274Abstract: A motor stator section (3a) is furnished with a busbar (51) attached to an armature (3), and with a circuit board (52) attached to the busbar (51). A parts accommodation recess (516) is formed in the busbar (51) surface that opposes the circuit board (52), and a holding recess (512), in which is anchored a sensor holder (54) that retains Hall sensors (53) mounted on the circuit board (52) is formed in the busbar (51) inner circumferential surface. Further, grooves are formed in the circuit board (52), the sensor holder (54), and the busbar (51), wherein fitting a jig (9) to these grooves enables high-precision assembly of these components.Type: GrantFiled: September 21, 2005Date of Patent: February 16, 2010Assignee: Nidec CorporationInventors: Nakaba Kataoka, Takayuki Migita, Hiroaki Suzuki
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Patent number: 7663287Abstract: A motor includes a stator and a bus bar supported axially above the stator. The bus bar includes a concave portion arranged in a lower surface thereof facing toward coils of the stator. In a gap defined between the coil and the concave portion, a portion of the wire extracted from the coil and wound in the circumferential direction (i.e., a crossover wire portion) is accommodated. The bus bar includes a wire-positioning hole through which the wire is led to a terminal to be connected with the wire.Type: GrantFiled: June 5, 2007Date of Patent: February 16, 2010Assignee: Nidec CorporationInventors: Hidehiro Haga, Yoshiaki Yamashita, Nakaba Kataoka
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Patent number: 7608959Abstract: In an armature for a brushless motor, a gap is provided between an inner circumferential surface of a cylinder portion of a cover and an outer circumferential surface in a radial direction of the armature. A plurality of non-magnetic spacers having a predetermined distance therebetween are provided in a circumferential direction so as to make contact with the inner circumferential surface of the cylinder portion and the outer circumferential surface of the armature.Type: GrantFiled: October 20, 2006Date of Patent: October 27, 2009Assignee: Nidec CorporationInventors: Nakaba Kataoka, Keita Nakanishi, Yoshiaki Yamashita