Patents by Inventor Akinobu ISHIZAKI
Akinobu ISHIZAKI 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: 11936244Abstract: A rotor includes a rotor core. The rotor core has an outer shape including a first arc portion provided so as to intersect a d-axis, a straight line portion provided so as to intersect a q-axis, and a curved portion that connects the first arc portion and the straight line portion. The first arc portion has an arc shape centered on an axial center of the rotor core. The curved portion includes an arc-shaped second arc portion that bulges outward in a radial direction of the rotor core. The radius of curvature of the second arc portion being smaller than a radius of curvature of the first arc portion.Type: GrantFiled: August 20, 2019Date of Patent: March 19, 2024Assignee: Daikin Industries, Ltd.Inventors: Kiyotaka Nishijima, Akinobu Ishizaki, Hisato Sumitomo, Takanori Hori
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Publication number: 20210296951Abstract: A rotor includes a rotor core. The rotor core has an outer shape including a first arc portion provided so as to intersect a d-axis, a straight line portion provided so as to intersect a q-axis, and a curved portion that connects the first arc portion and the straight line portion. The first arc portion has an arc shape centered on an axial center of the rotor core. The curved portion includes an arc-shaped second arc portion that bulges outward in a radial direction of the rotor core. The radius of curvature of the second arc portion being smaller than a radius of curvature of the first arc portion.Type: ApplicationFiled: August 20, 2019Publication date: September 23, 2021Inventors: Kiyotaka NISHIJIMA, Akinobu ISHIZAKI, Hisato SUMITOMO, Takanori HORI
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Patent number: 10637306Abstract: A stator for a simultaneous concentrated winding motor includes a core having 3×m teeth, and 3×m windings. The windings include at least a U1 winding and a U2 winding that belong to a U phase, a V1 winding and a V2 winding that belong to a V phase, and a W1 winding and a W2 winding that belong to a W phase. First lead wires of the U1 winding, the V1 winding, and the W1 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged. First lead wires of the U2 winding, the V2 winding, and the W2 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged.Type: GrantFiled: September 26, 2016Date of Patent: April 28, 2020Assignee: Daikin Industries, Ltd.Inventors: Hisato Sumitomo, Kazuo Ida, Akinobu Ishizaki, Hidemi Tanji, Akio Mutou
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Publication number: 20180278101Abstract: A stator for a simultaneous concentrated winding motor includes a core having 3×m teeth, and 3×m windings. The windings include at least a U1 winding and a U2 winding that belong to a U phase, a V1 winding and a V2 winding that belong to a V phase, and a W1 winding and a W2 winding that belong to a W phase. First lead wires of the U1 winding, the V1 winding, and the W1 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged. First lead wires of the U2 winding, the V2 winding, and the W2 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged.Type: ApplicationFiled: September 26, 2016Publication date: September 27, 2018Applicant: Daikin Industries, Ltd.Inventors: Hisato SUMITOMO, Kazuo IDA, Akinobu ISHIZAKI, Hidemi TANJI, Akio MUTOU
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Patent number: 9991756Abstract: A stator for a motor of a compressor includes a stator core, insulator, coil, slot insulator, and inter-coil insulator. The stator core has a plurality of tooth portions arrayed circumferentially. The insulator is fitted to axial end faces of the stator core. The coil is wound on the tooth portions. The slot insulator is placed within slot portions that are spaces between circumferentially neighboring ones of the tooth portions, and which are interposed between the stator core and the coil. The inter-coil insulator is placed between circumferentially mutually neighboring windings of the coil. The inter-coil insulator is sheet shaped and folded over a width equal to double a sheet thickness at a folding-bottom portion extending along an axial direction. The folding-bottom portion is positioned on a distal end side of the tooth portions. Movement of the folding-bottom portion in a radial direction toward the rotor is restricted.Type: GrantFiled: November 24, 2015Date of Patent: June 5, 2018Assignee: Daikin Industries, Ltd.Inventors: Akinobu Ishizaki, Hidemi Tanji, Keiji Aota, Akio Mutou
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Patent number: 9979250Abstract: A stator includes a stator core and an insulator installed on an axial-direction end surface of the stator core. The stator core has a cylindrical part, a plurality of teeth, and a plurality of windings. The windings are wound around the teeth. Each winding has a first end and a second end. The insulator has a plurality winding grooves to support the second ends. Each winding groove has a first space and a second space. The first space includes an opening. The second space includes a tip part to catch the second end, and communicate with the first space via a bent part.Type: GrantFiled: October 9, 2015Date of Patent: May 22, 2018Assignee: Daikin Industries, Ltd.Inventor: Akinobu Ishizaki
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Publication number: 20170353075Abstract: A stator for a motor of a compressor includes a stator core, insulator, coil, slot insulator, and inter-coil insulator. The stator core has a plurality of tooth portions arrayed circumferentially. The insulator is fitted to axial end faces of the stator core. The coil is wound on the tooth portions. The slot insulator is placed within slot portions that are spaces between circumferentially neighboring ones of the tooth portions, and which are interposed between the stator core and the coil. The inter-coil insulator is placed between circumferentially mutually neighboring windings of the coil. The inter-coil insulator is sheet shaped and folded over a width equal to double a sheet thickness at a folding-bottom portion extending along an axial direction. The folding-bottom portion is positioned on a distal end side of the tooth portions. Movement of the folding-bottom portion in a radial direction toward the rotor is restricted.Type: ApplicationFiled: November 24, 2015Publication date: December 7, 2017Inventors: Akinobu ISHIZAKI, Hidemi TANJI, Keiji AOTA, Akio MUTOU
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Publication number: 20170317549Abstract: A stator includes a stator core and an insulator installed on an axial-direction end surface of the stator core. The stator core has a cylindrical part, a plurality of teeth, and a plurality of windings. The windings are wound around the teeth. Each winding has a first end and a second end. The insulator has a plurality winding grooves to support the second ends. Each winding groove has a first space and a second space. The first space includes an opening. The second space includes a tip part to catch the second end, and communicate with the first space via a bent part.Type: ApplicationFiled: October 9, 2015Publication date: November 2, 2017Inventor: Akinobu ISHIZAKI
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Patent number: 9608490Abstract: A compressor includes a casing, a compression mechanism arranged inside the casing, a motor arranged inside the casing, and an insulation sheet. The motor drives the compression mechanism. The motor is a concentrated-winding motor having a stator that has a plurality of teeth, and an insulator adjacent to the stator, with windings wound about the teeth with the insulator interposed between the windings and the teeth. The insulation sheet is arranged between the casing and crossover wires of the windings.Type: GrantFiled: December 2, 2014Date of Patent: March 28, 2017Assignee: Daikin Industries, Ltd.Inventors: Keiji Aota, Akinobu Ishizaki
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Publication number: 20160315517Abstract: A compressor includes a casing, a compression mechanism arranged inside the casing, a motor arranged inside the casing, and an insulation sheet. The motor drives the compression mechanism. The motor is a concentrated-winding motor having a stator that has a plurality of teeth, and an insulator adjacent to the stator, with windings wound about the teeth with the insulator interposed between the windings and the teeth. The insulation sheet is arranged between the casing and crossover wires of the windings.Type: ApplicationFiled: December 2, 2014Publication date: October 27, 2016Inventors: Keiji AOTA, Akinobu ISHIZAKI