Patents by Inventor Hirofumi Atarashi
Hirofumi Atarashi 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: 7548005Abstract: This electric motor includes first permanent magnets secured integrally to an outer periphery side rotor and second permanent magnets secured integrally to an inner periphery side rotor. The first permanent magnets and the second permanent magnets are arranged so as to offset the relative torque produced between the outer periphery side rotor and the inner periphery side rotor based on the magnetic flux of the inner peripheral permanent magnets and the outer peripheral permanent magnets.Type: GrantFiled: May 22, 2007Date of Patent: June 16, 2009Assignee: Honda Motor Co.Ltd.Inventors: Masaaki Kaizuka, Hiromitsu Sato, Hirofumi Atarashi, Shoei Abe
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Patent number: 7548038Abstract: A controller for a motor is capable of reducing the amount of energization required to operate a motor under a predetermined condition, the motor having two rotors disposed around a rotating shaft.Type: GrantFiled: March 21, 2007Date of Patent: June 16, 2009Assignee: Honda Motor Co., Ltd.Inventors: Hirofumi Atarashi, Hiroyuki Isegawa
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Patent number: 7538510Abstract: A controller for a motor permits efficient energization control according to an operating condition of a motor without depending on a number of revolutions of the motor when operating a motor having two rotors disposed around a rotating shaft. The controller includes a voltage-between-terminals increaser which carries out at least one of first processing for increasing a voltage between terminals in which a rotor phase difference is changed by an actuator in a direction for reducing the magnetic fluxes of fields of the motor, second processing for increasing a voltage between terminals in which an output voltage of a DC power source is increased by a DC/DC converter, and third processing for increasing a voltage between terminals in which d-axis current is increased in the case where the magnitude of a resultant vector of a command value of a d-axis voltage and a command value of a q-axis voltage in the motor exceeds the radius of a target voltage circle.Type: GrantFiled: March 21, 2007Date of Patent: May 26, 2009Assignee: Honda Motor Co., Ltd.Inventors: Hirofumi Atarashi, Hiroyuki Isegawa
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Publication number: 20090096314Abstract: The present invention relates to a new process for the preparation of NO-donating compounds using a sulfonated intermediate. The invention relates to new intermediates prepared therein suitable for large scale manufacturing of NO-donating compounds. The invention further relates to the use of the new intermediates for the manufacturing of pharmaceutically active NO-donating compounds. The invention further relates to a substantially crystalline form of NO-donating NSAIDs, especially 2-[2-(nitrooxy)ethoxy]ethyl {2-[(2,6-dichlorophenyl)amino]phenyl}acetate, the preparation thereof and to pharmaceutical formulations containing said crystalline form and to the use of said crystalline form in the preparation of a medicament.Type: ApplicationFiled: October 12, 2006Publication date: April 16, 2009Inventors: Hirofumi Atarashi, Shoei Abe, Tamotsu Kawamura, Hiromitsu Sato
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Publication number: 20090033258Abstract: A motor controller for an axial-gap motor permits a reduced size of the entire system of including a drive circuit and a power source of the motor, reduced cost, and higher reliability to be achieved by controlling the energization mode of the motor. The motor controller has a torque command determiner which inputs a first DC voltage to a first inverter at least either when a rotor is at a halt or when the number of revolutions of the rotor is a predetermined number of revolutions or less, supplies a field axis current for changing the magnetic flux of a field of the rotor to a first stator from the first inverter such that the amount of energization is temporally changed, converts an induced voltage developed in a second stator by the supplied field axis current into a second DC voltage by a second inverter, and outputs the second DC voltage, thereby charging a second battery.Type: ApplicationFiled: August 1, 2008Publication date: February 5, 2009Applicant: HONDA MOTOR CO., LTD.Inventor: Hirofumi Atarashi
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Patent number: 7486043Abstract: A controller for a motor performs field weakening control by changing a phase difference between two rotors, which are concentrically disposed, and by accurately recognizing the phase difference.Type: GrantFiled: March 7, 2007Date of Patent: February 3, 2009Assignee: Honda Motor Co., Ltd.Inventor: Hirofumi Atarashi
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Publication number: 20090026999Abstract: A motor controller (2) for an axial-gap motor (1), which has a rotor (3), two stators (4, 5) disposed on both sides of the rotor (3) in the axial direction, and armature windings (6, 7) wrapped around the stators (4, 5), includes a field current controller (43, 44) which adjusts the field current in the current supplied to the armature windings (6, 7) of at least one of the stators (4, 5) so as to restrain a thrust force acting on the rotor (3) in the axial direction of the rotor (3). This restrains the thrust force acting on the rotor (3) of the axial-gap motor (1).Type: ApplicationFiled: July 23, 2008Publication date: January 29, 2009Applicant: HONDA MOTOR CO., LTD.Inventor: Hirofumi ATARASHI
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Publication number: 20090001914Abstract: An electric-motor-equipped vehicle of the present invention includes an electric motor which receives a power supply from a storage apparatus and drives the vehicle, or assists a driving of the vehicle by an internal combustion engine. The electric motor includes: an inner circumference side rotor and an outer circumference side rotor which are each provided with magnet pieces, and rotation axes of which are coaxially arranged; a stator which is arranged on an outer circumferential side or an inner circumferential side of the inner circumference side rotor and the outer circumference side rotor; and a phase modification device capable of modifying a relative phase between the inner circumference side rotor and the outer circumference side rotor.Type: ApplicationFiled: February 19, 2007Publication date: January 1, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Hirofumi Atarashi, Hiroyuki Isegawa, Hiromitsu Sato, Masaaki Kaizuka, Shoei Abe
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Publication number: 20080290752Abstract: An axial gap motor including a rotor and stators, wherein: the rotor is provided with a plurality of primary magnet portions, a plurality of auxiliary magnet portions, and a rotor frame; the rotor frame is provided with a plurality of ribs that extend in the radial direction of the rotor frame, and a shaft portion and a rim portion that are integrally connected with each other via the ribs, and the rotor frame houses the primary magnet portions and the auxiliary magnet portions; the primary magnet portions are provided with primary permanent magnet pieces; the auxiliary magnet portions are provided with auxiliary permanent magnet pieces; and each of cross-sectional areas of the ribs which is perpendicular to the radial direction increases from the rim portion side towards the shaft portion side in the radial direction.Type: ApplicationFiled: December 13, 2007Publication date: November 27, 2008Inventors: Keiichi Yamamoto, Hirofumi Atarashi, Shoei Abe, Shigeru Tajima
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Publication number: 20080246425Abstract: In a predetermined operating state of an electric motor 3 of an axial air-gap type, control is carried out as follows. A phase difference between an electric current supplied to an armature winding 13a of one of the stators 12a and an electric current supplied to an armature winding 13b of the other stator 12a is set so as to suppress a variation in an output torque of the electric motor 3, and electric currents having the phase difference are supplied to the armature windings 13a, 13b of the stators 12a, 12b. In an operating state other than the predetermined operating state, an electric current supplied to the armature winding 13a of the one of the stators 12a and an electric current supplied to the armature winding 13b of the other stator 12b are in a same phase.Type: ApplicationFiled: April 2, 2008Publication date: October 9, 2008Applicant: HONDA MOTOR CO., LTD.Inventor: Hirofumi ATARASHI
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Publication number: 20080246429Abstract: A controller of an electric motor for improving operation efficiency in performing electric conducting control of the electric motor of an axial air-gap type is provided.Type: ApplicationFiled: March 31, 2008Publication date: October 9, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Hirofumi ATARASHI, Shoei Abe, Keiichi Yamamoto, Shigeru Tajima
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Publication number: 20080246363Abstract: A controller able to efficiently operate an electric motor of an axial air-gap type as an electric motor and an electricity generator is provided.Type: ApplicationFiled: April 3, 2008Publication date: October 9, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Hirofumi Atarashi, Shoei Abe, Keiichi Yamamoto
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Publication number: 20080129237Abstract: A motor control method that includes the steps of: rotationally driving a motor that is provided with a rotor having permanent magnet pieces, and a stator; and short circuiting a plurality of phases of the motor when the rotational frequency of the motor is equal to or greater than a predetermined rotational frequency.Type: ApplicationFiled: November 30, 2007Publication date: June 5, 2008Inventors: Hirofumi Atarashi, Hiroyuki Isegawa
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Publication number: 20080129136Abstract: An axial gap type motor according to the present invention includes: a rotor; and a pair of stators which are arranged to face each other and hold the rotor from both sides thereof along a rotation axis. The rotor includes: electromagnets which are provided on the rotor as main magnets, and arranged along a circumferential direction so that directions of magnetic fluxes thereof are parallel to the rotation axis; and sub permanent magnets which are provided on the rotor, arranged in the vicinities of circumferential end portions of the main magnets, and are magnetized orthogonal to the rotation axis and a radial direction.Type: ApplicationFiled: November 29, 2007Publication date: June 5, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Shoei ABE, Hirofumi ATARASHI, Keiichi YAMAMOTO, Shigeru TAJIMA, Makoto KAWAKAMI, Takeo FUKUDA
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Publication number: 20080056690Abstract: A motor control device includes: a motor that has a plurality of rotors which respectively have a magnetic piece, which drives or supplementarily drives a vehicle; a phase changing mechanism that changes relative phases of the plurality of rotors, and sets these to a predetermined induced voltage constant; and a speed control device that controls a phase changing speed of the phase changing mechanism.Type: ApplicationFiled: August 14, 2007Publication date: March 6, 2008Inventors: Naoki Fujishiro, Hirofumi Atarashi, Hiroyuki Isegawa
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Publication number: 20080036415Abstract: There is provided a controller for a motor capable of changing the phase difference between two rotors that can prevent demagnetization of permanent magnets or the rotors. The motor has two rotors each having a permanent magnet and phase difference changing driving means for changing the phase difference between the rotors. The controller has a demagnetization determining means for determining whether or not demagnetization of the permanent magnets of the rotors occurs during operation of the motor, and rotor phase difference controlling means for controlling the phase difference changing driving means to change the phase difference between the rotors from a current phase difference to a phase difference that results in a higher strength of a composite field of the permanent magnets if the result of determination by the demagnetization determining means is positive.Type: ApplicationFiled: August 7, 2007Publication date: February 14, 2008Inventors: Masaaki Kaizuka, Hirofumi Atarashi, Masanari Fukuchi, Katsuhiko Furukawa
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Publication number: 20080040015Abstract: This motor control apparatus is provided with: a reduced energy calculation device that calculates a reduced energy that is produced when a drive mode of a hybrid vehicle is shifted from a drive mode driven by a motor to a drive mode driven by an internal combustion engine and if the phase of the motor is changed from the present phase to the arbitrary required phase; a displacement energy calculation device that calculates a displacement energy that is produced when the present phase is changed to the arbitrary required phase; and a phase change permission device that compares the reduced energy and the displacement energy, and permits changing from the present phase to the required phase when it is determined that the reduced energy is greater than the displacement energy.Type: ApplicationFiled: August 7, 2007Publication date: February 14, 2008Inventors: Naoki Fujishiro, Hirofumi Atarashi, Masashi Tanaka
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Publication number: 20080030163Abstract: To provide a controller for a motor that can appropriately set the induced voltage constant of a motor of a double rotor type according to the operational state of the motor and expand the controllable range of the motor. A controller has a Ke command calculator 90 that calculates a command value Ke_c of the induced voltage constant of a motor 1 based on the output voltage Vdc of a direct-current power supply, the number of revolutions Nm of the motor 1 and a torque command Tr_c in such a manner that the magnitude of a vector sum of a d-axis current and a q-axis current that have to be supplied in order to produce the torque according to the torque command Tr_c is minimized, and a phase difference controller 80 that calculates a command value ?d_c of a rotor phase difference according to the command value Ke_c and outputs the command value ?d_c to an actuator 25 to change the rotor phase difference.Type: ApplicationFiled: August 2, 2007Publication date: February 7, 2008Inventors: Masanari Fukuchi, Hirofumi Atarashi, Kenji Tsukamoto
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Publication number: 20080024082Abstract: A controller for a motor carries out field weakening control by using a simple construction to change the phase difference between two rotors, which are disposed around a rotating shaft, without depending on the number of revolutions of a motor. The controller for a motor includes a field weakening current calculator for calculating a field weakening current command value on the basis of the radius of a target voltage circle, a d-axis voltage command value, and a q-axis voltage command value, a rotor phase difference command value determiner for determining a command value of a rotor phase difference on the basis of the field weakening current command value, and a current command value determiner for determining a d-axis current command value and a q-axis current command value on the basis of the rotor phase difference command value and a torque command value.Type: ApplicationFiled: March 14, 2007Publication date: January 31, 2008Inventors: Hirofumi Atarashi, Hiroyuki Isegawa, Tamotsu Kawamura
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Publication number: 20080019855Abstract: A controller for a motor cleans, as necessary, a hydraulic chamber that generates hydraulic oil for changing a phase difference between two rotors so as to restrain sludge from building up in the hydraulic chamber. A motor has a first rotor and a second rotor that can be relatively rotated with respect to the first rotor. The controller includes a phase difference changing driver that changes the phase difference between the two rotors by controlling the pressure in the hydraulic chamber filled with hydraulic oil. The controller further includes a cleaning need determiner that determines the need for cleaning the hydraulic chamber, and a cleaning phase difference controller that controls the phase difference changing driver such that the second rotor is relatively rotated in the forward direction and the reverse direction alternately with respect to the first rotor if a determination result of the cleaning need determiner is affirmative.Type: ApplicationFiled: July 18, 2007Publication date: January 24, 2008Inventors: Hirofumi Atarashi, Kazuyuki Iwata