Patents by Inventor Mikio Takabatake
Mikio Takabatake 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: 11909267Abstract: According to one embodiment, a first permanent magnet and a second permanent magnet are disposed in each magnetic pole of a rotor core. When angular coordinates of intersections of a flux line in a d-axial direction passing an outer end A1 of the first permanent magnet, a flux line in the d-axial direction passing through an inner end A2 of the first permanent magnet, a flux line in the d-axial direction passing an outer end B1 of the second permanent magnet, a flux line in the d-axial direction passing an inner end B2 of the second permanent magnet and a circumscribing circle of the rotor core are respectively defined as ?dA1, ?dA2, ?dB1 and ?dB2, the ?dA1, ?dA2, ?dB1 and ?dB2 satisfy a formula (?34/p<(?dB1-?dA1)<22/p, ?34/p<(?dB2??dA2)<22/p).Type: GrantFiled: January 15, 2021Date of Patent: February 20, 2024Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Hiroaki Makino, Makoto Matsushita, Katsutoku Takeuchi, Daisuke Misu, Fumiaki Ito, Masakatsu Matsubara, Mikio Takabatake
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Publication number: 20210135521Abstract: According to one embodiment, a first permanent magnet and a second permanent magnet are disposed in each magnetic pole of a rotor core. When angular coordinates of intersections of a flux line in a d-axial direction passing an outer end A1 of the first permanent magnet, a flux line in the d-axial direction passing through an inner end A2 of the first permanent magnet, a flux line in the d-axial direction passing an outer end B1 of the second permanent magnet, a flux line in the d-axial direction passing an inner end B2 of the second permanent magnet and a circumscribing circle of the rotor core are respectively defined as ?dA1, ?dA2, ?dB1 and ?dB2, the ?dA1, ?dA2, ?dB1 and ?dB2 satisfy a conditional formula (?34/p<(?dB1-?dA1)<22/p, ?34/p<(?dB2??dA2)<22/p).Type: ApplicationFiled: January 15, 2021Publication date: May 6, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Hiroaki MAKINO, Makoto MATSUSHITA, Katsutoku TAKEUCHI, Daisuke MISU, Fumiaki ITO, Masakatsu MATSUBARA, Mikio TAKABATAKE
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Patent number: 8362668Abstract: A rotor for a rotating electrical machine suppresses demagnetization of permanent magnets without deteriorating motor characteristics, is low-cost, and is highly reliable. The rotor has a plurality of rotor cores that are stacked together, a plurality of permanent magnets axially divided by the rotor cores and circumferentially arranged on each of the rotor cores, to circumferentially form magnetic irregularities, and a rotor blank made of nonmagnetic material arranged between those of the rotor cores that are adjacent to each other.Type: GrantFiled: November 25, 2008Date of Patent: January 29, 2013Assignees: Kabushiki Kaisha Toshiba, Toshiba Industrial Products Manufacturing CorporationInventors: Norio Takahashi, Mikio Takabatake, Masanori Arata, Kazuto Sakai, Yutaka Hashiba, Wataru Ito, Tadashi Tokumasu, Masakatsu Matsubara
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Patent number: 8076805Abstract: A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils.Type: GrantFiled: March 28, 2008Date of Patent: December 13, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yasuo Kabata, Masafumi Fujita, Mikio Takabatake, Hitoshi Katayama, Mikio Kakiuchi, Koji Matsuyama, Yoshiyuki Shimoda
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Publication number: 20100301697Abstract: A rotor for a rotating electrical machine suppresses demagnetization of permanent magnets without deteriorating motor characteristics, is low-cost, and is highly reliable. The rotor has a plurality of rotor cores (2) that are stacked together, a plurality of permanent magnets (6a, 6b) axially divided by the rotor cores (2) and circumferentially arranged on each of the rotor cores (2), to circumferentially form magnetic irregularities, and a rotor blank (14a) made of nonmagnetic material arranged between those of the rotor cores (2) that are adjacent to each other.Type: ApplicationFiled: November 25, 2008Publication date: December 2, 2010Applicants: Kabushiki Kaisha Toshiba, Toshiba Industrial Products Manufacturing Corp.Inventors: Norio Takahashi, Mikio Takabatake, Masanori Arata, Kazuto Sakai, Yutaka Hashiba, Wataru Ito, Tadashi Tokumasu, Masakatsu Matsubara
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Patent number: 7804216Abstract: For an electrical reluctance rotary machine, a stator has a winding as an armature, and a rotor has permanent magnet implanting slots provided in a rotor core at lateral sides magnetic poles configured to produce reluctance torque along directions of magnetic flux passing through the magnetic poles to produce reluctance torque, and permanent magnets inserted in the permanent magnet implanting slots so as to cancel magnetic flux of the armature intersecting that magnetic flux, to control a magnetic field leaking at ends of the magnetic poles, having circumferential magnetic unevenness. The electrical reluctance rotary machine is configured to meet a relationship, such that 1.6 ? P × W pm R ? 1.9 where Wpm [mm] is a width of permanent magnet, R [mm] is a radius of the rotor, and P is the number of poles.Type: GrantFiled: October 19, 2007Date of Patent: September 28, 2010Assignees: Kabushiki Kaisha Toshiba, Toshiba Industrial Products Manufacturing CorporationInventors: Norio Takahashi, Kazuto Sakai, Masanori Arata, Yutaka Hashiba, Wataru Ito, Motoyasu Mochizuki, Mikio Takabatake, Masakatsu Matsubara, Takashi Hanai
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Publication number: 20100033051Abstract: A permanent-magnet rotating electrical machine includes a stator with an armature coil and a rotor arranged to rotate with a predetermined air gap with respect to the stator. The rotor includes a rotor core. Permanent magnets are arranged inside the rotor core on an outer circumferential side, or at the surface of the rotor core. The permanent magnets each are divided into a plurality of segments in an axial direction along a dividing face. The dividing face and an end face of the permanent magnet facing a circumferential direction form acute angles to define narrowed areas to suppress generation of eddy currents in the permanent magnets, prevent deterioration of the permanent magnets, and improve efficiency of the permanent-magnet rotating electrical machine.Type: ApplicationFiled: December 25, 2007Publication date: February 11, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Mikio Takabatake, Norio Takahashi, Motoyasu Mochizuki, Tadashi Tokumasu
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Publication number: 20080252156Abstract: A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils.Type: ApplicationFiled: March 28, 2008Publication date: October 16, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuo Kabata, Masafumi Fujita, Mikio Takabatake, Hitoshi Katayama, Mikio Kakiuchi, Koji Matsuyama, Yoshiyuki Shimoda
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Publication number: 20080093944Abstract: For an electrical reluctance rotary machine, a stator has a winding as an armature, and a rotor has permanent magnet implanting slots provided in a rotor core at lateral sides magnetic poles configured to produce reluctance torque along directions of magnetic flux passing through the magnetic poles to produce reluctance torque, and permanent magnets inserted in the permanent magnet implanting slots so as to cancel magnetic flux of the armature intersecting that magnetic flux, to control a magnetic field leaking at ends of the magnetic poles, having circumferential magnetic concavo-convex. The electrical reluctance rotary machine is configured to meet a relationship, such that 1.6 ? P × W pm R ? 1.9 where Wpm [mm] is a width of permanent magnet, R [mm] is an outer-diametrical radius of the rotor, and P is the number of poles.Type: ApplicationFiled: October 19, 2007Publication date: April 24, 2008Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INDUSTRIAL PRODUCTS MANUFACTURING CORP.Inventors: Norio TAKAHASHI, Kazuto Sakai, Masanori Arata, Yutaka Hashiba, Wataru Ito, Motoyasu Mochizuki, Mikio Takabatake, Masakatsu Matsubara, Takashi Hanai
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Patent number: 6552462Abstract: A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for negating the armature windings' flux passing between adjoining poles. Each magnet 6 is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion 7 is provided between the pole and the interpole of the rotor 3. Owing to the provision of the magnetic portion 7, when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor 3. Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.Type: GrantFiled: June 4, 2001Date of Patent: April 22, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Kazuto Sakai, Masanori Arata, Mikio Takabatake, Yoshio Hashidate, Ryoichi Kurosawa, Yosuke Nakazawa, Tadashi Tokumasu
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Publication number: 20020047436Abstract: A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for negating the armature windings' flux passing between adjoining poles. Each magnet 6 is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion 7 is provided between the pole and the interpole of the rotor 3. Owing to the provision of the magnetic portion 7, when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor 3. Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.Type: ApplicationFiled: June 4, 2001Publication date: April 25, 2002Inventors: Kazuto Sakai, Masanori Arata, Mikio Takabatake, Yoshio Hashidate, Ryoichi Kurosawa, Yosuke Nakazawa, Tadashi Tokumasu
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Patent number: 6342745Abstract: A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for negating the armature windings' flux passing between adjoining poles. Each magnet 6 is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion 7 is provided between the pole and the interpole of the rotor 3. Owing to the provision of the magnetic portion 7, when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor 3 Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.Type: GrantFiled: September 13, 2000Date of Patent: January 29, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Kazuto Sakai, Masanori Arata, Mikio Takabatake, Yoshio Hashidate, Ryoichi Kurosawa, Yosuke Nakazawa, Tadashi Tokumasu
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Patent number: 6274960Abstract: A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for negating the armature windings' flux passing between adjoining poles. Each magnet 6 is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion 7 is provided between the pole and the interpole of the rotor 3. Owing to the provision of the magnetic portion 7, when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor 3. Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.Type: GrantFiled: September 28, 1999Date of Patent: August 14, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Kazuto Sakai, Masanori Arata, Mikio Takabatake, Yoshio Hashidate, Ryoichi Kurosawa, Yosuke Nakazawa, Tadashi Tokumasu
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Patent number: 6268677Abstract: A rotor is provided for a permanent magnet type rotating machine having a stator 1 with armature windings 11. The rotor 3 includes a rotor core 31 and a plurality of permanent magnets 32 arranged in the rotor core 31 so as to negate magnetic flux of the armature windings 11 passing through interpoles 3b. The rotor 3 is constructed so that the average of magnetic flux in an air gap 2 between the rotor 3 and the stator 1, which is produced by the permanent magnets 32 at the armature windings' de-energized, ranges from 0.1 [T] to 0.7 [T] and the ratio (Lq/Ld) of self-inductance of the magnetic portion in a hard-magnetizing direction (q-axis) to self-inductance in an easy-magnetizing direction (d-axis) under a rated load condition ranges from 0.1 to 0.8. Under these conditions, it is possible to realize the rotating machine which operates as an induction machine at the machine's starting and also operates as an synchronous machine at the rated driving due to smooth pull-in.Type: GrantFiled: March 29, 2000Date of Patent: July 31, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Mikio Takabatake, Masanori Arata, Kazuto Sakai, Yutaka Hashiba, Yoshio Hashidate, Norio Takahashi, Koji Oishi, Shiro Amemori