Patents by Inventor Hiroaki Kajiura
Hiroaki Kajiura 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: 8253296Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.Type: GrantFiled: July 25, 2011Date of Patent: August 28, 2012Assignee: Denso CorporationInventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
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Publication number: 20120007462Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.Type: ApplicationFiled: July 25, 2011Publication date: January 12, 2012Applicant: DENSO CORPORATIONInventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
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Patent number: 8008830Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.Type: GrantFiled: March 4, 2008Date of Patent: August 30, 2011Assignee: Denso CorporationInventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
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Publication number: 20100141078Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are fanned at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.Type: ApplicationFiled: March 4, 2008Publication date: June 10, 2010Applicant: DENSO CORPORATIONInventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
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Patent number: 6806687Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.Type: GrantFiled: January 22, 2004Date of Patent: October 19, 2004Assignee: Denso CorporationInventor: Hiroaki Kajiura
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Patent number: 6798104Abstract: A rotary electric machine includes a stator core having a plurality of slots disposed at an inner periphery, an armature winding disposed in the slots and a rotor disposed inside the inner periphery of the stator. The rotor includes a first rotor portion and a second rotor portion, which are disposed magnetically in parallel with each other. The first rotor portion has a plurality of permanent-magnet poles, and a second rotor portion has a plurality of salient induction poles.Type: GrantFiled: December 16, 2002Date of Patent: September 28, 2004Assignee: Denso CorporationInventors: Hiroaki Kajiura, Masahiro Seguchi
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Publication number: 20040150233Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.Type: ApplicationFiled: January 22, 2004Publication date: August 5, 2004Applicant: Denso CorporationInventor: Hiroaki Kajiura
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Patent number: 6713888Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.Type: GrantFiled: December 19, 2001Date of Patent: March 30, 2004Assignee: Denso CorporationInventor: Hiroaki Kajiura
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Publication number: 20030090167Abstract: A rotary electric machine includes a stator core having a plurality of slots disposed at an inner periphery, an armature winding disposed in the slots and a rotor disposed inside the inner periphery of the stator. The rotor includes a first rotor portion and a second rotor portion, which are disposed magnetically in parallel with each other. The first rotor portion has a plurality of permanent-magnet poles, and a second rotor portion has a plurality of salient induction poles.Type: ApplicationFiled: December 16, 2002Publication date: May 15, 2003Applicant: DENSO CORPORATIONInventors: Hiroaki Kajiura, Masahiro Seguchi
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Patent number: 6563246Abstract: A rotary electric machine includes a stator core having a plurality of slots disposed at an inner periphery, an armature winding disposed in the slots and a rotor disposed inside the inner periphery of the stator. The rotor includes a first rotor portion and a second rotor portion, which are disposed magnetically in parallel with each other. The first rotor portion has a plurality of permanent-magnet poles, and a second rotor portion has a plurality of salient induction poles.Type: GrantFiled: October 13, 2000Date of Patent: May 13, 2003Assignee: Denso CorporationInventors: Hiroaki Kajiura, Masahiro Seguchi
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Publication number: 20020074803Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.Type: ApplicationFiled: December 19, 2001Publication date: June 20, 2002Applicant: Denso CorporationInventor: Hiroaki Kajiura
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Patent number: 6018694Abstract: A gas-sparing vehicle is achieved by a control system for a hybrid vehicle equipped at least with: a hybrid engine which includes at least a first rotary electric unit for deciding the rpm of the engine and a second rotary electric unit for deciding the driving force of the vehicle and which has power converting means connected to the output shaft of the engine; and electricity storing means. In one embodiment, a hybrid controller 16 controls the drive of a first rotary electric unit 2000 according to a startup torque command value which is decided based on the rpm of an engine at the time of engine startup and which decreases as the rpm increases; it also determines that the complete explosion in an engine 1 has occurred when the startup torque command value falls below a predetermined complete explosion judgment value.Type: GrantFiled: March 27, 1998Date of Patent: January 25, 2000Assignee: Denso CorporationInventors: Tsuneyuki Egami, Hiroshi Fujita, Keiichiro Banzai, Takeshi Sawada, Hiroya Tsuji, Kazuyoshi Obayashi, Hiroaki Kajiura, Masahiro Seguchi, Toyoaki Kurita
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Patent number: 5955807Abstract: A synchronous electric machine includes a stator having an armature winding, a rotor having axially laminated magnetic sheets and a field coil, a plurality of permanent magnets disposed in the rotor to form N-pole and S-pole on the outer circumference of the rotor, and ribs and pins magnetically bypassing the N-poles and S-poles of the permanent magnets. The pins also attach the laminated magnetic sheets together as a unit. The rotor has a plurality of axially extending holes on its circumference for accommodating permanent magnets.Type: GrantFiled: April 27, 1998Date of Patent: September 21, 1999Assignee: Denso CorporationInventors: Hiroaki Kajiura, Keiichiro Banzai, Sumio Yanase, Akira Fukushima
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Patent number: 5917248Abstract: A T-S converter is composed of a first rotor which has a first control coil, a second rotor and a stator which has a second control coil. The second rotor has a first magnetic field member (such as permanent magnets) which supplies the first control coil with magnetic field and a second magnetic field member (such as permanent magnets) which supplies the second control coil with magnetic field. The first and second control coils are energized to drive the second rotor to rotate at a set speed with a set torque according to vehicle running condition. The first and the second control coil are also energized to generate battery charging current when the vehicle speed is decreased and the second rotor is driven by the vehicle wheels.Type: GrantFiled: April 25, 1997Date of Patent: June 29, 1999Assignee: Denso CorporationInventors: Masahiro Seguchi, Hiroaki Kajiura, Keiichiro Banzai, Shinji Kouda, Kazuyoshi Obayashi
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Patent number: 5744895Abstract: A T-S converter is composed of a first rotor which has a first control coil, a second rotor and a stator which has a second control coil. The second rotor has a first magnetic field member (such as laminated sheets of ferromagnetic material) which supplies the first control coil with magnetic field and a second magnetic field member (such as laminated sheets of ferromagnetic material) which supplies the second control coil with magnetic field. The first and second control coils are energized to drive the second rotor to rotate at a set speed with a set torque according to vehicle running condition. The first and the second control coil are also energized to generate battery charging current when the vehicle speed is decreased and the second rotor is driven by the vehicle wheels.Type: GrantFiled: July 3, 1996Date of Patent: April 28, 1998Assignee: Nippondenso Co., Ltd.Inventors: Masahiro Seguchi, Keiichiro Banzai, Hiroaki Kajiura, Akio Yasuda
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Patent number: 5663631Abstract: A full-wave-rectifying-circuit is composed of six diodes and six transistors inversely connected in parallel with the diodes. A phase-control-circuit has three magnetic sensors each of which corresponds to one of the phase-windings and positioned so as to lag by an electric angle of 90.degree. to provide digital signals which lag an electric at an angle of 60.degree. behind the induced-phase-signal. The six transistors are driven by the digital signals to form controlled AC voltages which lag behind the induced line voltages by an electric angle 60.degree. so that the alternator increases the output power without increase of the body size.Type: GrantFiled: July 6, 1995Date of Patent: September 2, 1997Assignee: Nippondenso Co., Ltd.Inventors: Hiroaki Kajiura, Akira Mase
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Patent number: 5449962Abstract: A stator coil of a rotary electric machine includes a three-phase Y-form connection circuit including first windings Y1, Y2 and Y3, which are connected in Y-form, and a three-phase delta-form connection circuit including second windings .increment.x3, .increment.y3 and .increment.z3 which are connected in delta-form, wherein the second windings .increment.x3, .increment.y3 and .increment.z3 are sequentially inserted in slots of a stator core to have a phase difference of 120.degree. therebetween, and each of the first windings Y1, Y2 and Y3 is divided into two windings, and the divided first windings are separately inserted in the slots, in which the second windings .increment.x3, .increment.y3 and .increment.z3 have been inserted, so that the resultant composite voltage vector of each pair of the divided first windings is shifted by 30.degree. in phase from the voltage vector of one of the second windings .increment.x3, .increment.y3 and .increment.z3.Type: GrantFiled: October 13, 1993Date of Patent: September 12, 1995Assignee: Nippondenso Co., Ltd.Inventors: Akiya Shichijyo, Shin Kusase, Hiroaki Kajiura, Atsushi Umeda