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Koichi Hirota
Koichi Hirota, Tokyo JP
| Patent application number | Description | Published |
|---|---|---|
| 20110068651 | ROTOR FOR PERMANENT MAGNET ROTATING MACHINE - In connection with a permanent magnet rotary machine comprising a rotor comprising a rotor core and a plurality of permanent magnet segments embedded in the rotor core and a stator comprising a stator core having a plurality of slots and windings therein, the rotor and the stator being disposed to define a gap therebetween, or a permanent magnet rotary machine comprising a rotor comprising a rotor core and a plurality of permanent magnet segments mounted on the surface of the rotor core and a stator comprising a stator core having a plurality of slots and windings therein, the rotor and the stator being disposed to define a gap therebetween, the rotor wherein each of the permanent magnet segments is an assembly of further divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece. | 03-24-2011 |
| 20110079325 | METHOD FOR ASSEMBLING ROTOR FOR USE IN IPM ROTARY MACHINE - An interior permanent magnet (IPM) rotary machine comprises a rotor comprising a rotor yoke having bores and a plurality of permanent magnet segments disposed in the bores of the rotor yoke, each permanent magnet segment consisting of a plurality of magnet pieces. The rotor is assembled by inserting the plurality of unbound magnet pieces in each bore for stacking the magnet pieces, and fixedly securing the stacked magnet pieces in the bore. | 04-07-2011 |
| 20110080065 | ROTOR FOR AXIAL GAP-TYPE PERMANENT MAGNETIC ROTATING MACHINE - An axial gap-type permanent magnetic rotating machine comprises a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the rotor yoke such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of circumferentially arranged coils and disposed to define an axial gap with the rotor. In the rotor, each permanent magnet segment is an assembly of two or more divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece. | 04-07-2011 |
| 20110080066 | ROTOR FOR PERMANENT MAGNET ROTARY MACHINE - A permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments embedded in the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor, or a permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments mounted on the surface of the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor. In the rotor, each permanent magnet segment is an assembly of divided permanent magnet pieces, the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece, and the assembly allows for electrical conduction between the magnet pieces. | 04-07-2011 |
Koichi Hirota, Takahama-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100242363 | OPENING-AND-CLOSING MEMBER DRIVE CONTROL APPARATUS FOR VEHICLE - An opening-and-closing member drive control apparatus for a vehicle for driving the opening-and-closing member so as to be opened or closed by means of a driving force of a motor after an idling period or an idling section of the motor includes a moving speed detecting member, calculating means for calculating a moving speed changing value, a determining means for determining a sandwiching of an object on the basis of a relationship between the calculated moving speed changing value and a threshold value, a temperature estimating means for estimating a temperature of the motor on the basis of a rotational speed of the motor, detected in the idling period or the idling section, and correcting means for correcting the threshold value so that a determination sensitivity of the sandwiching of the object becomes greater when the estimated temperature of the motor is low than when the estimated temperature of the motor is high. | 09-30-2010 |
Koichi Hirota, Takahama JP
| Patent application number | Description | Published |
|---|---|---|
| 20100191426 | Seat control device, method, and program - Devices, methods, and programs control a seat drive mechanism that drives side support parts of a seat. The devices, methods, and programs detect a first curve ahead of a vehicle and a second curve located ahead of the first curve with respect to a travel direction. The devices, methods, and programs predict a between-curves time required to travel between the first curve and the second curve and determine whether the between-curves time is less than a predetermined time, the predetermined time being no less than a time necessary for the side support parts to operate. The devices, methods, and programs control the seat drive mechanism to arrange the side support parts at an action position to support a body of an occupant for the first curve. If the between-curves time is less than the predetermined time, the devices, methods, and programs maintain the side support parts at the action position while traveling the second curve. | 07-29-2010 |
Koichi Hirota, Aichi-Ken JP
| Patent application number | Description | Published |
|---|---|---|
| 20090160235 | HEAD REST DEVICE - A head rest device that improves reliability of detecting a head on the basis of a change in capacitance without complicating a wiring structure. A head rest device is provided with a head rest rear portion configured to be supported to a seat back, and a head rest front portion freely moving forward and backward between a fully-closed position coming close to the head rest rear portion and a fully-open position separated from the head rest rear portion. The head rest front portion is moved by an actuator. The head rest front portion has a sensor electrode structured such that its capacitance is changed as a head of an occupant approaches, and an ECU controlling the actuator so as to move the head rest front portion and detecting the approach of the head of the occupant on the basis of a change of the capacitance of the sensor electrode thereon. | 06-25-2009 |
| 20090265063 | HEADREST ADJUSTING DEVICE AND METHOD OF SAME - A face image obtained by imaging a vehicle occupant by a CCD camera ( | 10-22-2009 |
Koichi Hirota, Fukui JP
| Patent application number | Description | Published |
|---|---|---|
| 20090098006 | METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET MATERIAL - A method for preparing a rare earth permanent magnet material comprises the steps of disposing a powder on a surface of a sintered magnet body of R | 04-16-2009 |
Koichi Hirota, Aichi JP
| Patent application number | Description | Published |
|---|---|---|
| 20080296943 | Vehicle Seat - A head rest rear portion is supported to a seat back. A head rest front portion is movable forward and backward between a full-close position that is brought into contact with or close to the head rest rear portion and a full-open position that is a predetermined distance away from the head rest rear portion. A drive mechanism moves the head rest front portion. A detection sensor provided in the head rest front portion includes an electrode having a head portion detecting antenna electrode for detecting a head portion of an occupant at a time when the head rest front portion moves in the full-open position direction, and a finger detecting antenna electrode for detecting a finger of the occupant in a rear seat or the like at a time when the head rest front portion moves in the full-close position direction. | 12-04-2008 |
| 20090096468 | HEAD REST DEVICE FOR VEHICLE - When moving a head rest front portion in a full-open position direction, an ECU determines that the head rest front portion comes close to an occupant head portion on the basis of a detection result of an electrostatic capacitance sensor so as to stop the head rest front portion, and determines that the head rest front portion comes close to the occupant head portion on the basis of an absolute capacitance change with respect to a reference electrostatic capacitance value of the electrostatic capacitance sensor. Alternatively, the ECU determines that the head rest front portion comes close to the occupant head portion on the basis of a change amount of the electrostatic capacitance value of the electrostatic capacitance sensor. | 04-16-2009 |
Koichi Hirota, Fukui-Ken JP
| Patent application number | Description | Published |
|---|---|---|
| 20080245442 | Preparation of Rare Earth Permanent Magnet Material - A method for preparing a rare earth permanent magnet material comprising the steps of: | 10-09-2008 |
Koichi Hirota, Echizen-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20080247898 | METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET - A rare earth permanent magnet is prepared by providing a sintered magnet body consisting of 12-17 at % of rare earth, 3-15 at % of B, 0.01-11 at % of metal element, 0.1-4 at % of O, 0.05-3 at % of C, 0.01-1 at % of N, and the balance of Fe, disposing on a surface of the magnet body a powder comprising an oxide, fluoride and/or oxyfluoride of another rare earth, and heat treating the powder-covered magnet body at a temperature below the sintering temperature in vacuum or in an inert gas, for causing the other rare earth to be absorbed in the magnet body. | 10-09-2008 |
| 20110150691 | PREPARATION OF RARE EARTH PERMANENT MAGNET MATERIAL - A method for preparing a rare earth permanent magnet material comprises the steps of: disposing a powder comprising one or more members selected from an oxide of R | 06-23-2011 |