Patents by Inventor Kimiyasu Furusawa
Kimiyasu Furusawa 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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Publication number: 20230129627Abstract: A manufacturing method for a laminated core of a rotating electric machine includes a laminating step and a core separating step. In the laminating step, a plurality of core elements are laminated, thereby forming an element laminate. In the core separating step, under a state in which the element laminate is pressed in a lamination direction of the plurality of core elements, a part of the element laminate is moved from the element laminate in a direction orthogonal to the lamination direction by a set dimension in the lamination direction, thereby obtaining a separated laminate.Type: ApplicationFiled: April 25, 2022Publication date: April 27, 2023Applicant: Mitsubishi Electric CorporationInventors: Akihito MORI, Kota HIROHASHI, Kazuya HASEGAWA, Tomoyuki KINOSHITA, Norihiro MURATA, Kimiyasu FURUSAWA, Masahiro YUYA
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Patent number: 10404115Abstract: A contour line on the outer circumferential side of each magnet hole in the first layer is formed to be an arc passing through a total of three intersections, i.e., an intersection of a d axis and a reference magnetic flux line which is a magnetic flux line as a reference positioned inward by a predetermined number of magnetic flux lines from the outer circumferential edge of a rotor core, and intersections of: the reference magnetic flux line; and sides at the circumferential ends of the magnet hole which are positioned inward by a bridge dimension from the outer circumferential edge of the rotor core. Thus, a rotary electric machine that enables maximum utilization of reluctance torque and magnet torque and suppression of torque ripple can be obtained with simple processing and low cost.Type: GrantFiled: December 15, 2014Date of Patent: September 3, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Sachiko Kawasaki, Kimiyasu Furusawa, Atsushi Sakaue, Akira Hashimoto, Hiroyuki Akita, Moriyuki Hazeyama, Masaya Inoue, Shinji Nishimura
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Patent number: 10020098Abstract: In a production method for permanent magnet, a magnetic powder is loaded into a cavity formed in a groove shape whose longitudinal direction horizontally extends. A loading step of loading the magnetic powder includes a first loading step of loading, of the magnetic powder, a first magnetic powder containing no heavy rare earth element or containing a heavy rare earth element, and a second loading step of loading, of the magnetic powder, a second magnetic powder having a higher content rate of heavy rare earth element than that of the first magnetic powder, at a predetermined position in the cavity.Type: GrantFiled: September 5, 2013Date of Patent: July 10, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kimiyasu Furusawa, Yoshikazu Ugai, Hiroyuki Akita
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Publication number: 20160380492Abstract: A contour line on the outer circumferential side of each magnet hole in the first layer is formed to be an arc passing through a total of three intersections, i.e., an intersection of a d axis and a reference magnetic flux line which is a magnetic flux line as a reference positioned inward by a predetermined number of magnetic flux lines from the outer circumferential edge of a rotor core, and intersections of: the reference magnetic flux line; and sides at the circumferential ends of the magnet hole which are positioned inward by a bridge dimension from the outer circumferential edge of the rotor core. Thus, a rotary electric machine that enables maximum utilization of reluctance torque and magnet torque and suppression of torque ripple can be obtained with simple processing and low cost.Type: ApplicationFiled: December 15, 2014Publication date: December 29, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Sachiko KAWASAKI, Kimiyasu FURUSAWA, Atsushi SAKAUE, Akira HASHIMOTO, Hiroyuki AKITA, Moriyuki HAZEYAMA, Masaya INOUE, Shinji NISHIMURA
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Publication number: 20150179320Abstract: In a production method for permanent magnet, a magnetic powder is loaded into a cavity formed in a groove shape whose longitudinal direction horizontally extends. A loading step of loading the magnetic powder includes a first loading step of loading, of the magnetic powder, a first magnetic powder containing no heavy rare earth element or containing a heavy rare earth element, and a second loading step of loading, of the magnetic powder, a second magnetic powder having a higher content rate of heavy rare earth element than that of the first magnetic powder, at a predetermined position in the cavity.Type: ApplicationFiled: September 5, 2013Publication date: June 25, 2015Inventors: Kimiyasu Furusawa, Yoshikazu Ugai, Hiroyuki Akita
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Patent number: 8677608Abstract: An annular core member having an opening portion located at a position rotated by 90 degrees from a reference position, where the opening portion is oriented in the counterclockwise direction, and an annular core member having the opening portion located at the reference position, where the opening portion is oriented in the clockwise direction, are prepared to form an iron core by a rotary lamination apparatus by rotating the annular core members and by a predetermined angle (90 degrees) such that a first end, in the annular core member, which is at the position rotated by 90 degrees from the reference position and has no rotation uneven part, is circumference-positionally identical in the laminating direction with that of a fourth end, in an annular core member, which is at the reference position and has no rotation uneven part.Type: GrantFiled: July 24, 2008Date of Patent: March 25, 2014Assignee: Mitsubishi Electric CorporationInventors: Hiroyuki Akita, Kimiyasu Furusawa
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Patent number: 8536861Abstract: A wire rope flaw detector includes a magnetizer having a pair of exciting magnets disposed on a back yoke such that polarities thereof are opposite to each other, and forming a main magnetic path in a predetermined segment in an axial direction of a wire rope; and a leakage magnetic flux detection section disposed in the predetermined segment in the axial direction, and detecting leakage magnetic flux generated from a damaged portion of the wire rope. Each of the exciting magnets are formed so as to have a cross-section of a shape that embraces the wire rope when each exciting magnet is cut along a plane perpendicular to the axial direction of the wire rope, and has magnetic orientation, on the cross-section of the exciting magnet, oriented from at least two directions toward the wire rope.Type: GrantFiled: January 31, 2007Date of Patent: September 17, 2013Assignee: Mitsubishi Electric CorporationInventors: Kimiyasu Furusawa, Taizo Iwami, Takashi Yoshioka, Hiroshi Sasai
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Patent number: 8164329Abstract: A wire rope flaw detector comprises a back yoke and excitation permanent magnets, which form a main magnetic path in a predetermined section of a wire rope in the axial direction; a magnetic path member arranged in the predetermined section to be magnetically insulated from the back yoke and the permanent magnets and making the leakage flux generated from a damaged part of wire rope detour to the outside of the wire rope; and a detection coil wound around the magnetic path member for detecting leakage flux. The amount of leakage flux can be increased by providing the magnetic path member and since the windable area of the detection coil is increased, the number of turns of detection coil can be increased.Type: GrantFiled: January 31, 2007Date of Patent: April 24, 2012Assignee: Mitsubishi Electric CorporationInventors: Takashi Yoshioka, Hiroshi Sasai, Yoshinori Miyamoto, Kimiyasu Furusawa, Yukinobu Karata
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Publication number: 20110047780Abstract: An annular core member having an opening portion located at a position rotated by 90 degrees from a reference position, where the opening portion is oriented in the counterclockwise direction, and an annular core member having the opening portion located at the reference position, where the opening portion is oriented in the clockwise direction, are prepared to form an iron core by a rotary lamination apparatus by rotating the annular core members and by a predetermined angle (90 degrees) such that a first end, in the annular core member, which is at the position rotated by 90 degrees from the reference position and has no rotation uneven part, is circumference-positionally identical in the laminating direction with that of a fourth end, in an annular core member, which is at the reference position and has no rotation uneven part.Type: ApplicationFiled: July 24, 2008Publication date: March 3, 2011Applicant: Mitsubishi Electric CorporationInventors: Hiroyuki Akita, Kimiyasu Furusawa
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Publication number: 20100102807Abstract: A wire rope flaw detector comprises a back yoke and excitation permanent magnets, which form a main magnetic path in a predetermined section of a wire rope in the axial direction; a magnetic path member arranged in the predetermined section to be magnetically insulated from the back yoke and the permanent magnets and making the leakage flux generated from a damaged part of wire rope detour to the outside of the wire rope; and a detection coil wound around the magnetic path member for detecting leakage flux. The amount of leakage flux can be increased by providing the magnetic path member and since the windable area of the detection coil is increased, the number of turns of detection coil can be increased.Type: ApplicationFiled: January 31, 2007Publication date: April 29, 2010Inventors: Takashi Yoshioka, Hiroshi Sasai, Yoshinori Miyamoto, Kimiyasu Furusawa, Yukinobu Karata
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Publication number: 20100019762Abstract: A wire rope flaw detector includes a magnetizer having a pair of exciting magnets disposed on a back yoke such that polarities thereof are opposite to each other, and forming a main magnetic path in a predetermined segment in an axial direction of a wire rope; and a leakage magnetic flux detection section disposed in the predetermined segment in the axial direction, and detecting leakage magnetic flux generated from a damaged portion of the wire rope. Each of the exciting magnets are formed so as to have a cross-section of a shape that embraces the wire rope when each exciting magnet is cut along a plane perpendicular to the axial direction of the wire rope, and has magnetic orientation, on the cross-section of the exciting magnet, oriented from at least two directions toward the wire rope.Type: ApplicationFiled: January 31, 2007Publication date: January 28, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kimiyasu Furusawa, Taizo Iwami, Takashi Yoshioka, Hiroshi Sasai