Patents by Inventor Toshiyuki Yoshizawa
Toshiyuki Yoshizawa 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: 7095154Abstract: It is an object of the invention to obtain a generator motor for vehicles that can increase generated power or generated torque by a special positioning of permanent magnets in gaps between predetermined claw magnetic poles. The invention provides a generator motor for vehicles that includes a stator and a rotor provided rotatably within the inner periphery of the stator. The rotor includes: a pair of pole cores with plural claw magnetic poles formed on outer peripheral sides thereof, the plural claw magnetic poles of respective pole cores facing opposite to each other and meshing; plural permanent magnets that are arranged in the spaces between the claw magnetic poles adjacent to one another in the rotor circumferential direction; and a magnetic field coil that is mounted inside the pole cores. In the generator motor for vehicles, each permanent magnet02 is positioned toward one of the claw magnetic poles away from the center in the circumferential direction of the space between the claw magnetic poles.Type: GrantFiled: February 17, 2005Date of Patent: August 22, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Haruyuki Kometani, Toshiyuki Yoshizawa
-
Publication number: 20050184617Abstract: It is an object of the invention to obtain a generator motor for vehicles that can increase generated power or generated torque by a special positioning of permanent magnets in gaps between predetermined claw magnetic poles. The invention provides a generator motor for vehicles that includes a stator and a rotor provided rotatably within the inner periphery of the stator. The rotor includes: a pair of pole cores with plural claw magnetic poles formed on outer peripheral sides thereof, the plural claw magnetic poles of respective pole cores facing opposite to each other and meshing; plural permanent magnets that are arranged in the spaces between the claw magnetic poles adjacent to one another in the rotor circumferential direction; and a magnetic field coil that is mounted inside the pole cores. In the generator motor for vehicles, each permanent magnet02 is positioned toward one of the claw magnetic poles away from the center in the circumferential direction of the space between the claw magnetic poles.Type: ApplicationFiled: February 17, 2005Publication date: August 25, 2005Inventors: Masahiko Fujita, Haruyuki Kometani, Toshiyuki Yoshizawa
-
Publication number: 20050156479Abstract: A projected shape of permanent magnets is contained within a plane of projection formed by adjacent claw-shaped magnetic poles overlapping when the claw-shaped magnetic poles are viewed in a direction of rotation of a rotor, and is generally similar in shape to a shape of the plane of projection.Type: ApplicationFiled: December 6, 2004Publication date: July 21, 2005Inventors: Masahiko Fujita, Haruyuki Kometani, Toshiyuki Yoshizawa, Yoshihito Asao
-
Patent number: 6916005Abstract: A displacement sensor includes a ferromagnetic member for forming a magnetic path, a coil for generating a magnetic field in the magnetic path when fed with a high-frequency current, and a low-resistance magnetic-shielding member that moves across magnetic flux passing through the magnetic path. The sensor is excellent in production is, robust, and useful in high speed operation.Type: GrantFiled: August 31, 2001Date of Patent: July 12, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazutaka Seo, Masao Morita, Toshie Takeuchi, Yoshiaki Yamazaki, Toshiyuki Yoshizawa, Masafumi Sugawara
-
Patent number: 6888329Abstract: A method of controlling an electric rotating machine for a vehicle includes an electric rotating machine (1) including a rotator having a field winding (5) and a stator having an armature winding (3), a field current controller (9) for controlling a field current supplied from a direct-current power supply to the field winding (5), and a power converter (6) for converting a direct-current power into an alternating-current power and applying the power to the armature winding (3). When the field current controller (9) starts to supply a current to the field winding (5) for starting an internal combustion engine, the power converter (6) supplies a power to the armature winding (3) so that magnetic flux in a direction opposite to that generated by the field winding (5) is generated simultaneously with or immediately before starting the power supply.Type: GrantFiled: June 11, 2003Date of Patent: May 3, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masaya Inoue, Haruyuki Kometani, Toshiyuki Yoshizawa, Masahiko Fujita, Tsunenobu Yamamoto, Yoshihito Asao, Shinji Nishimura
-
Patent number: 6847150Abstract: A rotating electrical machine for a vehicle includes a stator having a multi-phase armature winding, a rotor having a pair of field cores which rotate together with a rotating shaft, and a field winding for magnetizing the pair of field cores, the pair of field cores respectively includes magnetic poles extending in an axial direction of the rotating shaft and being arranged to alternately engage with each other through a predetermined clearance Dc, each of the magnetic poles having a width in a rotation direction thereof is formed in a stair shape to be smaller toward a tip of the width, and the clearance Dc between adjacent the magnetic poles is set within a range from 50° to 70° in electrical angle. As a result, the rotating electrical machine for a vehicle can be obtained in which exciting force of harmonic components is reduced, electromagnetic noise, torque ripple and the like are effectively suppressed, and the productivity is excellent.Type: GrantFiled: November 3, 2003Date of Patent: January 25, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Haruyuki Kometani, Masaya Inoue, Yoshihito Asao, Masahiko Fujita, Toshiyuki Yoshizawa, Hiroyuki Akita
-
Publication number: 20040140731Abstract: A rotating electrical machine for a vehicle includes a stator having a multi-phase armature winding, a rotor having a pair of field cores which rotate together with a rotating shaft, and a field winding for magnetizing the pair of field cores, the pair of field cores respectively includes magnetic poles extending in an axial direction of the rotating shaft and being arranged to alternately engage with each other through a predetermined clearance Dc, each of the magnetic poles having a width in a rotation direction thereof is formed in a stair shape to be smaller toward a tip of the width, and the clearance Dc between adjacent the magnetic poles is set within a range from 50° to 70° in electrical angle. As a result, the rotating electrical machine for a vehicle can be obtained in which exciting force of harmonic components is reduced, electromagnetic noise, torque ripple and the like are effectively suppressed, and the productivity is excellent.Type: ApplicationFiled: November 3, 2003Publication date: July 22, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Haruyuki Kometani, Masaya Inoue, Yoshihito Asao, Masahiko Fujita, Toshiyuki Yoshizawa, Hiroyuki Akita
-
Publication number: 20040080291Abstract: A control method of controlling an electric rotating machine for vehicle includes an electric rotating machine 1 comprised of a rotator having a field winding 5 and a stator having an armature winding 3, a field current controller 9 for controlling a field current supplied from a direct-current power supply to the field winding 5, and a power converter 6 for converting a direct-current power into an alternating-current power and applying the power to the armature winding 3. When the field current controller 9 starts to supply a current to the field winding 5 for starting an internal combustion engine, the power converter 6 supplies a power to the armature winding 3 so that magnetic flux in a direction opposite to that generated by the field winding 5 is generated simultaneously with or immediately before starting the power supply.Type: ApplicationFiled: June 11, 2003Publication date: April 29, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masaya Inoue, Haruyuki Kometani, Toshiyuki Yoshizawa, Masahiko Fujita, Tsunenobu Yamamoto, Yoshihito Asao, Shinji Nishimura
-
Publication number: 20040011979Abstract: The displacement sensor includes a ferromagnetic member for forming a magnetic path, a coil for generating a magnetic field in the magnetic path when feeding a high-frequency current thereto, and a low-resistance magnetic-shielding member that moves across magnetic flux passing through the magnetic path, which is excellent in production, robust, and adaptable for the high speed operation of devices as well.Type: ApplicationFiled: April 8, 2003Publication date: January 22, 2004Inventors: Kazutaka Seo, Masao Morita, Toshie Takeuchi, Yoshiaki Yamazaki, Toshiyuki Yoshizawa, Masafumi Sugawara
-
Patent number: 6611413Abstract: A switching device includes a pair of fixed coils and a pair of movable coils, with one pair being disposed between the other pair. Two of the coils may be connected back to back on opposite sides of a support plate to increase the stiffness of the coils and reduce damage due to impact between the fixed and movable coils. The coils include two sets of coils, each set including one of the fixed coils and one of the movable coils. The coil sets can be driven simultaneously or at different times to effect contact opening and closing.Type: GrantFiled: May 23, 2001Date of Patent: August 26, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshie Takeuchi, Toyomi Ooshige, Hiroyuki Sasao, Hiroyuki Akita, Yukimori Kishida, Mitsuru Tsukima, Kenichi Koyama, Toshiyuki Yoshizawa
-
Patent number: 6433455Abstract: The vehicle AC generator comprises a stator core 4 having a stator coil 5, a first rotor core 8 and a second rotor core 9 provided on an inner diameter side of the stator core 4 to rotate, a field coil 10 for magnetizing the first rotor core 8 and the second rotor core 9, and a plurality of pole pieces 8a, 9a provided on the first rotor core 8 and the second rotor core 9 to extend in an axis direction of the rotation axis, and arranged to engage alternatively with each other via a predetermined clearance, and provided to oppose to an inner diameter surface of the stator core 4 via a predetermined clearance, wherein the poles pieces 8a, 9a are formed into an almost trapezoidal shape to reduce a width toward its tip portion in a rotation direction, and a skew angle against the axis direction of both side surfaces of the pole pieces in a rotation direction is set small on a root side and also set large on a tip side.Type: GrantFiled: July 27, 2000Date of Patent: August 13, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Haruyuki Kometani, Toshiyuki Yoshizawa, Yoshihito Asao, Katsumi Adachi
-
Patent number: 6417594Abstract: A concave portion 8a is provided at the tip in the axial central part of teeth in a stator 8.Type: GrantFiled: August 14, 2000Date of Patent: July 9, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Haruyuki Kometani, Toshiyuki Yoshizawa, Kyoko Higashino, Yoshihito Asao
-
Publication number: 20020044403Abstract: A switching apparatus includes a pair of fixed coils and a pair of movable coils, with one pair being disposed between the other pair. Two of the coils may be connected back to back on opposite sides of a support plate to increase the stiffness of the coils and reduce damage due to impact between the fixed and movable coils. The coils include two sets of coils, each including one of the fixed coils and one of the movable coils. The coil sets can be driven simultaneously or at different times to perform contact opening and closing operation.Type: ApplicationFiled: May 23, 2001Publication date: April 18, 2002Inventors: Toshie Takeuchi, Toyomi Ooshige, Hiroyuki Sasao, Hiroyuki Akita, Yukimori Kishida, Mitsuru Tsukima, Kenichi Koyama, Toshiyuki Yoshizawa
-
Patent number: 6353376Abstract: A switching assembly includes a switch portion having a fixed electrode and a movable electrode which are separable, a movable portion secured between a movable shaft connected to the movable electrode and a movable coil by a magnetic body, and a fixed portion having a magnetic body disposed radially inside a fixed coil disposed opposite the movable portion, thereby enabling intensification and swift establishment of magnetic fields generated between the coils.Type: GrantFiled: December 28, 1999Date of Patent: March 5, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshie Takeuchi, Toshiyuki Yoshizawa, Hiroyuki Akita, Hiroyuki Sasao, Yukimori Kishida