Patents by Inventor Kazutaka Maeda
Kazutaka Maeda 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).
-
Patent number: 10541084Abstract: There is a film capacitor capable of suppressing decrease in the electrostatic capacitance even after a self-healing phenomenon has occurred. A film capacitor includes a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin. The organic resin is preferably any one of a cyclic olefin-based resin, a polyarylate resin, a polyphenylene ether resin and a polyetherimide resin. The organic component is preferably at least one selected from the group consisting of cyclohexane, ethylcyclohexane, toluene, xylene, chloroform, and tetrahydrofuran.Type: GrantFiled: November 13, 2018Date of Patent: January 21, 2020Assignee: KYOCERA CORPORATIONInventors: Kazutaka Maeda, Wataru Kato
-
Publication number: 20190164692Abstract: There is a film capacitor capable of suppressing decrease in the electrostatic capacitance even after a self-healing phenomenon has occurred. A film capacitor includes a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin. The organic resin is preferably any one of a cyclic olefin-based resin, a polyarylate resin, a polyphenylene ether resin and a polyetherimide resin. The organic component is preferably at least one selected from the group consisting of cyclohexane, ethylcyclohexane, toluene, xylene, chloroform, and tetrahydrofuran.Type: ApplicationFiled: November 13, 2018Publication date: May 30, 2019Applicant: KYOCERA CorporationInventors: Kazutaka MAEDA, Wataru KATO
-
Patent number: 10147542Abstract: There is a film capacitor capable of suppressing decrease in the electrostatic capacitance even after a self-healing phenomenon has occurred. A film capacitor includes a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin. The organic resin is preferably any one of a cyclic olefin-based resin, a polyarylate resin, a polyphenylene ether resin and a polyetherimide resin. The organic component is preferably at least one selected from the group consisting of cyclohexane, ethylcyclohexane, toluene, xylene, chloroform, and tetrahydrofuran.Type: GrantFiled: March 3, 2015Date of Patent: December 4, 2018Assignee: KYOCERA CORPORATIONInventors: Kazutaka Maeda, Wataru Kato
-
Publication number: 20160372264Abstract: There is a film capacitor capable of suppressing decrease in the electrostatic capacitance even after a self-healing phenomenon has occurred. A film capacitor includes a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin. The organic resin is preferably any one of a cyclic olefin-based resin, a polyarylate resin, a polyphenylene ether resin and a polyetherimide resin. The organic component is preferably at least one selected from the group consisting of cyclohexane, ethylcyclohexane, toluene, xylene, chloroform, and tetrahydrofuran.Type: ApplicationFiled: March 3, 2015Publication date: December 22, 2016Applicant: KYOCERA CorporationInventors: Kazutaka MAEDA, Wataru KATO
-
Patent number: 7140098Abstract: An apparatus for shaping coil ends of a generator's stator having a plurality of sets of U-shaped large and small conductor segments. The apparatus includes four twister cylinders holding connection ends of the large and small conductor segments in four radial layers at an axial end of the stator, a rotating mechanism rotating the twister cylinders alternately in opposite directions, an elevating mechanism moving the twister cylinders in the axial direction of the stator, and a controller synchronously controlling the rotating mechanism and elevating mechanism.Type: GrantFiled: December 28, 2001Date of Patent: November 28, 2006Assignee: Denso CorporationInventors: Kazutaka Maeda, Masaru Sugiyama, Makoto Takahashi, Youichi Kamakura
-
Patent number: 6609289Abstract: A stator core has a plurality of slots. Insulating members are formed into a cylindrical shape and are inserted into the slots. Axial ends of the insulating members are expanded respectively and deformation marks thinner than the other portion are formed respectively. Then, the insulating members are moved toward the expanded ends to position the deformation marks in the out of the slots. After that, the conductors are inserted into the slots from the expanded side of the insulating members. Therefore, insulation failure at the portions of the deformation marks is prevented.Type: GrantFiled: March 18, 2002Date of Patent: August 26, 2003Assignee: Denso CorporationInventors: Yoshio Naka, Kazuki Maesoba, Kazutaka Maeda, Masaru Sugiyama
-
Patent number: 6604272Abstract: In a method of manufacturing a stator of a vehicle AC generator, U-shaped conductor segments having a turn portion and a pair of forked in-slot portions are formed so that the radial width of each conductor segment can be larger than the radial depth of each slot of a stator core. The in-slot portions of the conductor segments are compressed from radially outside and inserted into each slot in an axial direction of the stator core so that the conductor segments can provide a spring-back force in the slots. Then, the U-shaped conductor segments are welded at ends of the in-slot portions in a prescribed pattern.Type: GrantFiled: November 22, 2000Date of Patent: August 12, 2003Assignee: Denso CorporationInventors: Kazutaka Maeda, Masaru Sugiyama, Makoto Takahashi, Youichi Kamakura
-
Patent number: 6530140Abstract: The object of the present invention is to provide a method and an apparatus for manufacturing a stator to improve accuracy in inserting conductor segments (3, 31, 32) into slots (2). The apparatus according to the present invention comprises a conductor holder (21, 22) holding the conductor segments (3, 31, 32) and an axial-moving-mechanisms (214) moving the conductor holder (21, 22) relative to a stator core (1) in an axial direction. The conductor holder (21, 22) holds straight portions (31b, 31c, 32b, 32c) of the conductor segments (3, 31, 32) to be inserted into the slots (2) from one end of the stator core (1).Type: GrantFiled: April 17, 2001Date of Patent: March 11, 2003Assignee: Denso CorporationInventors: Kazutaka Maeda, Makoto Takahashi, Masaru Sugiyama, Youichi Kamakura, Nobuo Suko
-
Publication number: 20020089250Abstract: A stator core has a plurality of slots. Insulating members are formed into a cylindrical shape and are inserted into the slots. Axial ends of the insulating members are expanded respectively and deformation marks thinner than the other portion are formed respectively. Then, the insulating members are moved toward the expanded ends to position the deformation marks in the out of the slots. After that, the conductors are inserted into the slots from the expanded side of the insulating members. Therefore, insulation failure at the portions of the deformation marks is prevented.Type: ApplicationFiled: March 18, 2002Publication date: July 11, 2002Applicant: Denso CorporationInventors: Yoshio Naka, Kazuki Maesoba, Kazutaka Maeda, Masaru Sugiyama
-
Patent number: 6403921Abstract: A method of welding a plurality of connection ends of a plurality of copper segments forming a circumferentially disposed stator winding of a rotary electric machine. The method includes a step of inserting a protection member between connection ends of adjacent two of the plurality of copper segments, a step of activating a welder tool, and a step of circumferentially moving the welder tool relative to the connection ends.Type: GrantFiled: January 14, 2000Date of Patent: June 11, 2002Assignee: Denso CorporationInventors: Kazutaka Maeda, Mitsuru Kato, Mitsuaki Taira, Kimihiro Kuno, Mamoru Urushizaki
-
Patent number: 6400056Abstract: A stator core has a plurality of slots. Insulating members are formed into a cylindrical shape and are inserted into the slots. Axial ends of the insulating members are expanded respectively and deformation marks thinner than the other portion are formed respectively. Then, the insulating members are moved toward the expanded ends to position the deformation marks in the out of the slots. After that, the conductors are inserted into the slots from the expanded side of the insulating members. Therefore, insulation failure at the portions of the deformation marks is prevented.Type: GrantFiled: April 13, 2000Date of Patent: June 4, 2002Assignee: Denso CorporationInventors: Yoshio Naka, Kazuki Maesoba, Kazutaka Maeda, Masaru Sugiyama
-
Publication number: 20020053126Abstract: An apparatus for shaping coil ends of a generator's stator having a plurality of sets of U-shaped large and small conductor segments. The apparatus includes four twister cylinders holding connection ends of the large and small conductor segments in four radial layers at an axial end of the stator, a rotating mechanism rotating the twister cylinders alternately in opposite directions, an elevating mechanism moving the twister cylinders in the axial direction of the stator, and a controller synchronously controlling the rotating mechanism and elevating mechanism.Type: ApplicationFiled: December 28, 2001Publication date: May 9, 2002Applicant: DENSO CorporationInventors: Kazutaka Maeda, Masaru Sugiyama, Makoto Takahashi, Youichi Kamakura
-
Patent number: 6308549Abstract: An apparatus for forming a spirally wound stator core includes a pair of forming rollers having a wedge-shaped gap therebetween, a winding drum, a drum-drive motor, and a roller presser. A strip of magnetic material is inserted into the wedge-shaped gap to be pressed at a controlled pressure so that the strip is bent into a spiral with one side of the strip being radially inside. The controlled pressure is changed automatically according to a memorized relationship between the rotation speeds of the pair of forming rollers and suitable pressures applied to the strip.Type: GrantFiled: November 15, 1999Date of Patent: October 30, 2001Assignee: Denso CorporationInventors: Takashi Tokizawa, Katsumi Nagasaka, Masahiro Asano, Toshihiko Fujimoto, Katsumi Matsumoto, Katsuyoshi Shiraishi, Kazutaka Maeda, Satoru Nejigane
-
Publication number: 20010013167Abstract: The object of the present invention is to provide a method and an apparatus for manufacturing a stator to improve accuracy in inserting conductor segments (3, 31, 32) into slots (2). The apparatus according to the present invention comprises a conductor holder (21, 22) holding the conductor segments (3, 31, 32) and an axial-moving-mechanisms (214) moving the conductor holder (21, 22) relative to a stator core (1) in an axial direction. The conductor holder (21, 22) holds straight portions (31b, 31c, 32b, 32c) of the conductor segments (3, 31, 32) to be inserted into the slots (2) from one end of the stator core (1).Type: ApplicationFiled: April 17, 2001Publication date: August 16, 2001Applicant: DENSO CORPORATIONInventors: Kazutaka Maeda, Makoto Takahashi, Masaru Sugiyama, Youichi Kamakura
-
Patent number: 6249956Abstract: The object of the present invention is to provide a method and an apparatus for manufacturing a stator to improve accuracy in inserting conductor segments (3, 31, 32) into slots (2). The apparatus according to the present invention comprises a conductor holder (21, 22) holding the conductor segments (3, 31, 32) and an axial-moving-mechanisms (214) moving the conductor holder (21, 22) relative to a stator core (1) in an axial direction. The conductor holder (21, 22) holds straight portions (31b, 31c, 32b, 32c) of the conductor segments (3, 31, 32) to be inserted into the slots (2) from one end of the stator core (1).Type: GrantFiled: June 15, 1999Date of Patent: June 26, 2001Assignee: Denso CorporationInventors: Kazutaka Maeda, Makoto Takahashi, Masaru Sugiyama, Youichi Kamakura, Nobuo Suko
-
Patent number: 6177747Abstract: In a stator of a vehicle AC generator, each of stator slots has a circumferential parallel walls and a radial wall opposite a slot-opening. A stator winding has a plurality of radially aligned in-slot portions fitted in each of the slots at the circumferential sides thereof to form a central gap at the radially central portion of the in-slot portions. The central gap provides each of the in-slot portions with spring-back force against the slot-opening. Thus, slot-openings are hermetically closed, and the teeth are prevented from being vibrated by stator winding.Type: GrantFiled: October 29, 1999Date of Patent: January 23, 2001Assignee: DENSO CorporationInventors: Kazutaka Maeda, Masaru Sugiyama, Makoto Takahashi, Youichi Kamakura