Patents by Inventor Yutaka Kitamura
Yutaka Kitamura 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: 20070035185Abstract: A rotating electric machine for vehicles is capable of improving a cooling performance of switching elements forming an inverter module, and small-sizing the entire rotating electric machine. The rotating electric machine includes: a stator; a rotor, a cooling fan; a front bracket and a rear bracket; and a cover; and in which a pair of switching elements are disposed axially adjacent to each other between the rear bracket and the cover; a ventilation hole for sucking an outside air is formed on an axial wall of the cover; and by rotation of the cooling fan, the outside air flows from the ventilation hole with respect to the switching elements, and goes through a suction port and is discharged through a discharge port.Type: ApplicationFiled: August 9, 2006Publication date: February 15, 2007Inventors: Yoshihito Asao, Yutaka Kitamura, Hiroaki Aso
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Publication number: 20070035186Abstract: A rotating electric machine for vehicles is capable of improving a cooling performance of switching elements forming an inverter module, and small-sizing the entire rotating electric machine. The rotating electric machine includes: a stator; a rotor, a cooling fan; a front bracket and a rear bracket; and a cover; and in which a pair of switching elements are disposed axially adjacent to each other between the rear bracket and the cover; a ventilation hole for sucking outside air is formed in a radially outer circumferential portion of the cover; and by rotation of the cooling fan, the outside air flows radially from the ventilation hole with respect to the switching elements and goes through a suction port and is discharged through a discharge port.Type: ApplicationFiled: August 9, 2006Publication date: February 15, 2007Inventors: Yoshihito Asao, Yutaka Kitamura, Hiroaki Aso
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Publication number: 20070035270Abstract: [Problem] In a vehicular rotating electrical machine apparatus mounted in an electric vehicle or a hybrid electric vehicle, a rotating electrical machine apparatus in which a rotating electrical machine and an inverter unit to control the rotating electrical machine are integrated is miniaturized, and its torque characteristic and efficiency are improved. [Means for Resolution] Since an inverter unit 4 is cooled by cooling air forcibly formed by a cooling fan 28, the inverter unit 4 is efficiently cooled. Then, heat radiating fins 401a, 402a and 403a of heat sinks 401, 402 and 403 can be miniaturized, and consequently, the inverter unit 4 is miniaturized, and mountability of the inverter unit 4 to a rear bracket 19 is improved.Type: ApplicationFiled: March 3, 2005Publication date: February 15, 2007Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yutaka Kitamura, Yoshihito Asao
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Publication number: 20070023421Abstract: An inverter-integrated electrical rotating machine is provided in which each switching device of an inverter and power wiring and control wiring for connecting them can be highly protected electrically and mechanically while the cooling property of the switching devices can be improved. Cooling air flows led in from cooling air flow suction holes in an end wall of an inverter case simultaneously flow in parallel from the cooling air flow suction holes on inner and outer sides in the radial direction. The cooling air flows then penetrate an inverter device in an axial direction through an outer circumferential cooling air passage formed by an outer circumferential lateral plate part and an inner circumference of the inverter case and an inner circumferential cooling air passage formed between an inner circumferential lateral plate part and a cover surrounding a rotary shaft. The cooling air flows are then led into a motor housing from a cooling air flow suction hole of the housing.Type: ApplicationFiled: June 26, 2006Publication date: February 1, 2007Inventors: Yutaka Kitamura, Yoshihito Asao
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Publication number: 20060284580Abstract: The electric rotating machine includes a rotor and an armature. The rotor consists of a cylindrical part having a field winding and a claw-pole shaped magnetic pole part. A magnetic short-circuit mechanism is disposed between the magnetic pole parts adjacent each other in circumferential direction of a rotor core so as to cause a magnetic plate of a material of high magnetic permeability to move toward radial direction of the rotor core, thereby short-circuiting between N-pole and S-pole of a permanent magnet due to centrifugal force acting in accordance with rotation of the rotor.Type: ApplicationFiled: May 11, 2006Publication date: December 21, 2006Inventor: Yutaka Kitamura
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Publication number: 20060186754Abstract: Provided is a rotating electrical machine including an armature core on which an armature winding is wound; a rotor core which is supported by a rotation axis at a predetermined air gap in an inner diameter side of the armature core, and includes claw-shaped magnetic pole portions in which adjacent magnetic poles have different poles and a cylindrical portion having a field winding; and a permanent magnet which is provided in a magnetic circuit of the rotor core and supplies magnetic flux to the armature core with the field winding, wherein a magnetic short-circuiting mechanism for demagnetizing the magnetic flux of the permanent magnet by deforming a portion of the magnetic short-circuiting mechanism by a centrifugal force and short-circuiting between the magnetic pole portions of the rotor core is provided in the rotor core.Type: ApplicationFiled: January 31, 2006Publication date: August 24, 2006Inventors: Yutaka Kitamura, Yoshihito Asano, Hiroyuki Akita
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Patent number: 7028794Abstract: A transmission gear for an automobile includes a dynamo-electric machine operating as a motor and a generator, a dynamo-electric machine control device, a dynamo-electric machine pulley, an auxiliary machine pulley, a crank pulley rotatable relative to or integrally with the crank shaft, a sun gear coupled to the crank pulley, planetary gears each rotatable and revolvable along an outer periphery of the sun gear, a carrier for supporting the planetary gear rotatably and revolvably and connected to the crank shaft, an internal gear meshing with the planetary gear, an electromagnetic clutch for changing over the internal gear between restrained and unrestrained states, an electromagnetic clutch changeover control device, and a one-way clutch provided between the internal gear and the carrier.Type: GrantFiled: February 26, 2003Date of Patent: April 18, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiro Odahara, Yutaka Kitamura
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Patent number: 7021271Abstract: A belt drive system can appropriately transmit power of an electric rotating machine without setting initial belt tension to be large. In the belt drive system, a stationary tension pulley 18 is located on the side opposite to a crank pulley with respect to an electric rotating machine pulley 13 so that contact angle of a belt that is wrapped around the electric rotating machine pulley 13 in contact therewith may be in a range of 130° to 230°; an idle pulley 17a of a first stopper-equipped auto-tensioner 17 is located between the electric rotating machine pulley 13 and an internal combustion engine crank pulley 2; and position of the idle pulley 17a is fixed at the time of starting an internal combustion engine; while the idle pulley 17a coming to be movable at the time of driving the electric rotating machine as a generator.Type: GrantFiled: April 25, 2003Date of Patent: April 4, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Kitamura, Yoshihito Asao
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Patent number: 6975080Abstract: A rotating electrical machine for a vehicle is capable of improving the acceleration performance and the fuel mileage of the vehicle while achieving the prevention of occurrence of overvoltage and the improvement of its power generation characteristic at the same time. The machine includes an armature having an armature core and an armature winding wound around the armature core for generating an output voltage to charge a battery; a rotor having a rotor core with a field winding wound therearound, and permanent magnets for supplying magnetic flux to the armature core; and a voltage control section that adjust the output voltage of the armature by controlling the field current based on the value of an output voltage of the armature winding and the value and the direction of flow of the field current flowing through the field winding.Type: GrantFiled: January 18, 2005Date of Patent: December 13, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Kitamura, Yoshihito Asao
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Patent number: 6953407Abstract: A belt transmission apparatus capable of changing a tension of a belt by the action of belt tension adjuster 9, 30 from a first optimal value of higher tension suitable for the starting of engine 1 to a second optimal value of lower tension suitable for driving an accessory after engine 1 has been started. The belt transmission apparatus includes a rotating electric machine pulley 8 of a rotating electric machine for transmitting starting power to engine 1; engine pulley 2 for transmitting starting power to engine 1 and rotation power of engine 1 to accessories; auxiliary pulleys 3, 4, 5 rotated by the power from engine pulley 2 to drive the accessories belt 10 wrapped around rotating electric machine pulley 8, engine pulley 2 and auxiliary pulleys 3, 4, 5: and belt tension adjuster 9, 30 for urging belt 10 to set tension in a plurality of stages.Type: GrantFiled: October 23, 2001Date of Patent: October 11, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Kitamura, Youji Nishimura
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Publication number: 20050177316Abstract: A method of estimating, in addition to haplotype frequencies and diplotype configurations, a means and a standard deviation determining a distribution of a quantitative phenotype by the diplotype on the basis of data on observed genotypes and phenotype data taking a continuous value.Type: ApplicationFiled: September 21, 2004Publication date: August 11, 2005Applicants: Mitsubishi Research Institute, Inc., StaGen. Co., Ltd.Inventors: Naoyuki Kamatani, Toshikazu Ito, Yutaka Kitamura
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Publication number: 20050156543Abstract: A rotating electrical machine for a vehicle is capable of improving the acceleration performance and the fuel mileage of the vehicle while achieving the prevention of occurrence of overvoltage and the improvement of its power generation characteristic at the same time. The machine includes an armature having an armature core and an armature winding wound around the armature core for generating an output voltage to charge a battery; a rotor having a rotor core with a field winding wound therearound, and permanent magnets for supplying magnetic flux to the armature core; and a voltage control section that adjust the output voltage of the armature by controlling the field current based on the value of an output voltage of the armature winding and the value and the direction of flow of the field current flowing through the field winding.Type: ApplicationFiled: January 18, 2005Publication date: July 21, 2005Inventors: Yutaka Kitamura, Yoshihito Asao
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Patent number: 6878094Abstract: A power transmission control device for vehicle controls switching between a speed increasing mode and a constant speed mode on the basis of electrical load, battery or the like, and shock due to switching is less. The power transmission control device includes: an electric rotating machine 5; a crank pulley 15; a planetary gear mechanism consisting of a sun gear 18, a planetary gear 19 and an internal gear 20; and controller 70 for controlling an electromagnetic clutch 21. The electromagnetic clutch 21 is ON to operate the planetary gear mechanism as a speed increasing mechanism and drive the electric rotating machine 5 at an increasing speed, when engine speed of the internal combustion engine 1 is not higher than a predetermined value, remaining capacity of the battery 9 is not more than a predetermined level or electrical load is in a high-load state.Type: GrantFiled: April 29, 2003Date of Patent: April 12, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yutaka Kitamura, Kazuhiro Odahara, Shigeru Shiroyama
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Publication number: 20050009519Abstract: A communication apparatus is provided between the first communication network to which a portable terminal is connected and the second communication network having a communication protocol different from that of the first communication network. This apparatus includes a 3G gateway and DTMF detection unit. The 3G gateway performs communication protocol conversion between the first communication network and the second communication network. The DTMF detection unit detects a control signal contained in voice information from the portable terminal. An operation control method for a communication apparatus is also disclosed.Type: ApplicationFiled: July 6, 2004Publication date: January 13, 2005Applicant: NEC CorporationInventors: Yoshinobu Murai, Yutaka Kitamura
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Publication number: 20040251858Abstract: In a vehicle power supply system including a battery, an inverter unit for converting DC electric power of the battery into AC electric power and supplying it to a rotating electric machine to drive it, an AC wiring line for connecting the rotating electric machine and the inverter unit, and a DC wiring line for connecting the inverter unit and the battery, the inverter unit is placed in a vicinity of the battery so that the DC wiring line becomes shorter than the AC wiring line. By this, a voltage drop due to the DC wiring line is reduced, and a torque characteristic of the rotating electric machine can be improved.Type: ApplicationFiled: March 26, 2004Publication date: December 16, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yoshihito Asao, Yutaka Kitamura
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Publication number: 20040211613Abstract: An inverter unit is provided with: a case for housing a circuit board on which switching elements, diodes, and a capacitor are mounted; and a heat sink constructed integrally with the case. The inverter unit is mounted to an upper portion of the rotary electric machine by fixing the case to a mounting plate mounted to a boss. In addition, the inverter unit is electrically connected to three phase output terminals projecting out of a rear bracket by means of alternating-current wiring, and is electrically connected to a battery by means of direct-current wiring.Type: ApplicationFiled: April 23, 2004Publication date: October 28, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yoshihito Asao, Yutaka Kitamura
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Publication number: 20040164560Abstract: A transmission gear for an automobile includes a dynamo-electric machine operating as a motor and a generator, a dynamo-electric machine control means, a dynamo-electric machine pulley, an auxiliary machine pulley, a crank pulley rotatable relative to or integrally with the crank shaft, a sun gear coupled to the crank pulley, planetary gears each rotatable and revolvable along an outer periphery of the sun gear, a carrier for supporting the planetary gear rotatably and revolvably and connected to the crank shaft, an internal gear meshing with the planetary gear, an electromagnetic clutch for changing over the internal gear between restrained and unrestrained states, an electromagnetic clutch changeover control means, and a one-way clutch provided between the internal gear and the carrier.Type: ApplicationFiled: February 26, 2003Publication date: August 26, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Kazuhiro Odahara, Yutaka Kitamura
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Patent number: 6758781Abstract: In a process of assembling a rotating machine, a sun gear 26 which is fixed to an end portion of a rotor shaft 3, and which meshes with a planet gear 31 is configured integrally with a one-way clutch 18 which is disposed inside a carrier 34, and which transmits a rotating force from a pulley 17 to the rotor shaft 3 via the sun gear 26.Type: GrantFiled: August 29, 2001Date of Patent: July 6, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Katsuhiko Kusumoto, Tatsuhiko Mizutani, Keiichi Konishi, Yutaka Kitamura
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Publication number: 20030221656Abstract: A belt drive system can appropriately transmit power of an electric rotating machine without setting initial belt tension to be large. In the belt drive system, a stationary tension pulley 18 is located on the side opposite to a crank pulley with respect to an electric rotating machine pulley 13 so that contact angle of a belt that is wrapped around the electric rotating machine pulley 13 in contact therewith may be in a range of 130° to 230°; an idle pulley 17a of a first stopper-equipped auto-tensioner 17 is located between the electric rotating machine pulley 13 and an internal combustion engine crank pulley 2; and position of the idle pulley 17a is fixed at the time of starting an internal combustion engine; while the idle pulley 17a coming to be movable at the time of driving the electric rotating machine as a generator.Type: ApplicationFiled: April 25, 2003Publication date: December 4, 2003Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yutaka Kitamura, Yoshihito Asao
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Publication number: 20030224903Abstract: A power transmission control device for vehicle controls switching between a speed increasing mode and a constant speed mode on the basis of electrical load, battery or the like, and shock due to switching is less. The power transmission control device includes: an electric rotating machine 5; a crank pulley 15; a planetary gear mechanism consisting of a sun gear 18, a planetary gear 19 and an internal gear 20; and controller 70 for controlling an electromagnetic clutch 21. The electromagnetic clutch 21 is ON to operate the planetary gear mechanism as a speed increasing mechanism and drive the electric rotating machine 5 at an increasing speed, when engine speed of the internal combustion engine 1 is not higher than a predetermined value, remaining capacity of the battery 9 is not more than a predetermined level or electrical load is in a high-load state.Type: ApplicationFiled: April 29, 2003Publication date: December 4, 2003Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yutaka Kitamura, Kazuhiro Odahara, Shigeru Shiroyama