Patents by Inventor Seiji Hidaka

Seiji Hidaka 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: 10972026
    Abstract: A motor controlling device includes a high-side first switching element corresponding to each phase of a three-phase brushless motor, a low-side second switching element corresponding to each phase, a shunt resistor disposed between and connected to the second switching element and a grounding line, and a power controlling section for controlling the first switching element and the second switching element. The device further includes a decision section configured to effect abnormality decision based on a sum of values of currents flowing in the shunt resistors of all the phases acquired by using the power controlling section to switch OFF the first switching element of any one phase whose duty ratio is found equal to or greater than a threshold value for a predetermined period and also to switch ON the second switching element of the same one phase for the predetermined period.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: April 6, 2021
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Seiji Hidaka, Kazuki Sugimori
  • Publication number: 20200377150
    Abstract: A vehicle includes first and second steering drivers that steer first and second wheel pairs, a steering for the first and second wheel pairs, a detector that detects a steering detection angle of the first wheel pair, a lock that locks the first wheel pair to be non-steerable, a first steering controller that controls the first steering driver in accordance with a first steering angle, and a second steering controller that controls the second steering driver in accordance with a second steering angle. The first steering controller controls the lock to lock the steering of the first wheel pair upon detecting anomaly in the steering of the first wheel pair from the steering angle and the steering detection angle. The second steering controller controls the second steering driver in accordance with a second corrected steering angle, if the steering of the first wheel pair exhibits anomaly.
    Type: Application
    Filed: September 1, 2017
    Publication date: December 3, 2020
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Seiji HIDAKA, Shin KUNIEDA
  • Patent number: 10744874
    Abstract: A vehicle, such as a hybrid vehicle, according to one aspect of the present invention is configured such that: a propeller shaft rotated by an engine is arranged so as to extend in a vehicle body front-rear direction; a drive gear provided at a rear end portion of the propeller shaft and a driven gear configured to rotate together with a differential case of a differential device mesh with each other; a motor or a generator is connected to the differential case so as to transmit power to the differential case; the motor or the generator is arranged at one of vehicle width direction right and left sides of an axis of the propeller shaft; and the differential case is arranged at the other of the vehicle width direction right and left sides of the axis of the propeller shaft.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: August 18, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Seiji Hidaka, Eiji Mito, Tomoo Sawazaki, Hideo Toyota
  • Publication number: 20200252012
    Abstract: A motor controlling device includes a high-side first switching element corresponding to each phase of a three-phase brushless motor, a low-side second switching element corresponding to each phase, a shunt resistor disposed between and connected to the second switching element and a grounding line, and a power controlling section for controlling the first switching element and the second switching element. The device further includes a decision section configured to effect abnormality decision based on a sum of values of currents flowing in the shunt resistors of all the phases acquired by using the power controlling section to switch OFF the first switching element of any one phase whose duty ratio is found equal to or greater than a threshold value for a predetermined period and also to switch ON the second switching element of the same one phase for the predetermined period.
    Type: Application
    Filed: March 24, 2017
    Publication date: August 6, 2020
    Applicant: AISIN SEIKI KABUDHIKI KAISHA
    Inventors: Seiji HIDAKA, Kazuki SUGIMORI
  • Publication number: 20200234871
    Abstract: An inductor includes a plurality of wires disposed about an axis, a first electrode connected to a first end of each of the plurality of wires, and a second electrode connected to a second end of each of the plurality of wires. Each of the wires includes an outer-winding helical portion shifting in an axial direction while gradually increasing a radius thereof, an inner-winding helical portion shifting in the axial direction while gradually reducing a radius thereof, and an outer circumference connection portion that connects an end of the outer-winding helical portion and an end of the inner-winding helical portion at different positions in the axial direction.
    Type: Application
    Filed: April 7, 2020
    Publication date: July 23, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Seiji HIDAKA
  • Patent number: 10650180
    Abstract: A capacitor simulation method and nonlinear equivalent circuit model enabling dynamic simulation of nonlinear characteristics when direct-current voltage is applied with high precesion are easily provided using a simple configuration. An equivalent circuit of a capacitor is represented using a series circuit of passive circuit elements. Characteristic change ratios of the passive circuit elements when a direct-current voltage is applied are expressed as an approximate function on the basis of an actually measured value. A reference voltage is referred to by control current sources connected in parallel to the passive circuit elements. The characteristic change ratios are calculated in accordance with the reference voltage Vref.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: May 12, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Seiji Hidaka, Atsushi Sakuragi
  • Patent number: 10521533
    Abstract: An inductor simulation method and nonlinear equivalent circuit model enabling dynamic simulation of nonlinear characteristics when a direct current is superimposed with high precision. An equivalent circuit of an inductor is represented using a series circuit of passive circuit elements. Characteristic change ratios of the passive circuit elements when a direct current is superimposed are expressed as an approximate function on the basis of actually measured values. A reference current measured by each of voltage source models is referred to by a control voltage source connected in series to the passive circuit elements. The characteristic change ratios are calculated in accordance with the reference current Iref. Difference voltages are generated on the basis of the characteristic change ratios and voltages occurring when no direct current is superimposed, they are superimposed on the voltages VL1 and VR1 occurring when no direct current is superimposed, thereby simulating the nonlinear characteristics.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: December 31, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Seiji Hidaka, Ko Yamanaga
  • Patent number: 10267674
    Abstract: An analysis device constructs an analytical model with a circuit board and a medium, and applies a concentrated load grouping composed of concentrated loads to the circuit board. In this case, the concentrated loads are established such that the sum of the respective vectors is zero, and such that the torque is zero with respect to the center of gravity. The analysis device applies a finite element method to the analytical model to figure out the vibration of the circuit board, which is caused when the concentrated loads vibrate with a constant period. The change in the pressure of the medium is computed from the vibration of the circuit board, and the change in the pressure is converted to a sound pressure.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 23, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroshi Mifune, Seiji Hidaka, Yasuo Fujii
  • Patent number: 10220702
    Abstract: A power transfer unit for transferring power from a front wheel side to a rear wheel side comprises: a hollow transfer input shaft which is coupled to an engine and through which a right-side front-wheel axle is penetrated; a transfer output shaft disposed to extend in a direction orthogonal to the transfer input shaft; a transfer drive gear provided on an outer periphery of the transfer input shaft; and a transfer driven gear provided on an outer periphery of the transfer output shaft and meshed with the transfer drive gear. It further comprises a damper mechanism configured to absorb a fluctuation in torque input from an engine side into the transfer input shaft. The damper mechanism is disposed such that an intermediate portion and a left end-side portion thereof overlap the transfer driven gear in an extension direction of the transfer output shaft, in top plan view.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: March 5, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yuzo Ohkawa, Eiji Mito, Seiji Hidaka
  • Publication number: 20190031022
    Abstract: A vehicle, such as a hybrid vehicle, according to one aspect of the present invention is configured such that: a propeller shaft rotated by an engine is arranged so as to extend in a vehicle body front-rear direction; a drive gear provided at a rear end portion of the propeller shaft and a driven gear configured to rotate together with a differential case of a differential device mesh with each other; a motor or a generator is connected to the differential case so as to transmit power to the differential case; the motor or the generator is arranged at one of vehicle width direction right and left sides of an axis of the propeller shaft; and the differential case is arranged at the other of the vehicle width direction right and left sides of the axis of the propeller shaft.
    Type: Application
    Filed: March 23, 2017
    Publication date: January 31, 2019
    Inventors: Seiji Hidaka, Eiji Mito, Tomoo Sawazaki, Hideo Toyota
  • Publication number: 20170008395
    Abstract: A power transfer unit for transferring power from a front wheel side to a rear wheel side comprises: a hollow transfer input shaft which is coupled to an engine and through which a right-side front-wheel axle is penetrated; a transfer output shaft disposed to extend in a direction orthogonal to the transfer input shaft; a transfer drive gear provided on an outer periphery of the transfer input shaft; and a transfer driven gear provided on an outer periphery of the transfer output shaft and meshed with the transfer drive gear. It further comprises a damper mechanism configured to absorb a fluctuation in torque input from an engine side into the transfer input shaft. The damper mechanism is disposed such that an intermediate portion and a left end-side portion thereof overlap the transfer driven gear in an extension direction of the transfer output shaft, in top plan view.
    Type: Application
    Filed: January 14, 2015
    Publication date: January 12, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yuzo OHKAWA, Eiji MITO, Seiji HIDAKA
  • Patent number: 9355210
    Abstract: A method for deriving an equivalent circuit model of a capacitor which makes it possible to derive, with high accuracy and with ease, an equivalent circuit model having characteristics in accordance with a direct current voltage applied to a capacitor. Characteristic values of predetermined resistive elements and capacitive elements forming an equivalent circuit model of a capacitor change in response to a DC bias voltage being applied to the capacitor, and the change is attributable to the material of a dielectric forming the capacitor. However, by multiplying the characteristic values of the resistive elements and the capacitive elements held while the DC bias voltage is not applied by a dimensionless coefficient in accordance with an application rule, the characteristic values of the resistive elements and the capacitive elements are corrected to values in accordance with the voltage of the DC bias voltage applied to the capacitor.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: May 31, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Seiji Hidaka, Atsushi Sakuragi
  • Publication number: 20160070837
    Abstract: An inductor simulation method and nonlinear equivalent circuit model enabling dynamic simulation of nonlinear characteristics when a direct current is superimposed with high precision. An equivalent circuit of an inductor is represented using a series circuit of passive circuit elements. Characteristic change ratios of the passive circuit elements when a direct current is superimposed are expressed as an approximate function on the basis of actually measured values. A reference current measured by each of voltage source models is referred to by a control voltage source connected in series to the passive circuit elements. The characteristic change ratios are calculated in accordance with the reference current Iref. Difference voltages are generated on the basis of the characteristic change ratios and voltages occurring when no direct current is superimposed, they are superimposed on the voltages VL1 and VR1 occurring when no direct current is superimposed, thereby simulating the nonlinear characteristics.
    Type: Application
    Filed: November 9, 2015
    Publication date: March 10, 2016
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Seiji HIDAKA, Ko YAMANAGA
  • Publication number: 20160063159
    Abstract: A capacitor simulation method and nonlinear equivalent circuit model enabling dynamic simulation of nonlinear characteristics when direct-current voltage is applied with high precesion are easily provided using a simple configuration. An equivalent circuit of a capacitor is represented using a series circuit of passive circuit elements. Characteristic change ratios of the passive circuit elements when a direct-current voltage is applied are expressed as an approximate function on the basis of an actually measured value. A reference voltage is referred to by control current sources connected in parallel to the passive circuit elements. The characteristic change ratios are calculated in accordance with the reference voltage Vref.
    Type: Application
    Filed: November 6, 2015
    Publication date: March 3, 2016
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Seiji HIDAKA, Atsushi SAKURAGI
  • Publication number: 20160011040
    Abstract: An analysis device constructs an analytical model with a circuit board and a medium, and applies a concentrated load grouping composed of concentrated loads to the circuit board. In this case, the concentrated loads are established such that the sum of the respective vectors is zero, and such that the torque is zero with respect to the center of gravity. The analysis device applies a finite element method to the analytical model to figure out the vibration of the circuit board, which is caused when the concentrated loads vibrate with a constant period. The change in the pressure of the medium is computed from the vibration of the circuit board, and the change in the pressure is converted to a sound pressure.
    Type: Application
    Filed: September 25, 2015
    Publication date: January 14, 2016
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Hiroshi MIFUNE, Seiji HIDAKA, Yasuo FUJII
  • Publication number: 20150012899
    Abstract: A method for deriving an equivalent circuit model of a capacitor which makes it possible to derive, with high accuracy and with ease, an equivalent circuit model having characteristics in accordance with a direct current voltage applied to a capacitor. Characteristic values of predetermined resistive elements and capacitive elements forming an equivalent circuit model of a capacitor change in response to a DC bias voltage being applied to the capacitor, and the change is attributable to the material of a dielectric forming the capacitor. However, by multiplying the characteristic values of the resistive elements and the capacitive elements held while the DC bias voltage is not applied by a dimensionless coefficient in accordance with an application rule, the characteristic values of the resistive elements and the capacitive elements are corrected to values in accordance with the voltage of the DC bias voltage applied to the capacitor.
    Type: Application
    Filed: September 19, 2014
    Publication date: January 8, 2015
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Seiji HIDAKA, Atsushi SAKURAGI
  • Patent number: 8521362
    Abstract: Stabilizer control devices, methods, and programs obtain information indicating lateral acceleration operating on the vehicle and obtain information indicating a curve section existing in a traveling direction of the vehicle. The devices, methods, and programs control roll stiffness by a stabilizer mounted on the vehicle based on the obtained lateral acceleration information by setting a lateral acceleration threshold at a first value in the curve section and a second value in a section other than the curve section respectively, the first value being smaller than the second value. The devices, methods, and programs control the roll stiffness when the lateral acceleration is equal to or larger than the lateral acceleration.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: August 27, 2013
    Assignees: Aisin AW Co., Ltd., Aisin Seiki Kabushiki Kaisha
    Inventors: Takayuki Miyajima, Seiji Hidaka, Hirofumi Nitta
  • Patent number: 8489279
    Abstract: A damping force control apparatus includes a damping force control device controlling a damping force of a shock absorber provided between a sprung mass and an unsprung mass of each wheel of a vehicle, a detection device detecting at least an acceleration of the sprung mass in an up-down direction and a relative displacement between the sprung mass and the unsprung mass, a damping coefficient calculation device calculating a damping coefficient to be applied to the damping force control by the damping force control device based on detected results of the detection device, a sensed acceleration increment calculation device calculating a sensed acceleration increment corresponding to an increment of sense according to the Weber Fechner law on the basis of the detected results of the detection device, and a modification device modifying the damping coefficient in accordance with a sensed acceleration increment calculated by the sensed acceleration increment calculation device.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: July 16, 2013
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Seiji Hidaka, Akihito Yamamoto
  • Publication number: 20120046831
    Abstract: A first stabilizer (SBr) is disposed on an axle for driving wheels, a second stabilizer (SBf) is disposed on a different axle from the axle for driving wheels, a stabilizer control unit (RT, FT) is provided for adjusting torsional rigidity of the first stabilizer and second stabilizer, a turning state amount obtaining unit is provided for obtaining a turning state amount of the vehicle, and an accelerating operation amount obtaining unit is provided for obtaining an accelerating operation amount operated by a vehicle driver. Based on these obtained results, the torsional rigidity of at least one of the first stabilizer and second stabilizer is adjusted by the stabilizer control unit, when the turning state amount of the vehicle is equal to or more than a predetermined turning state amount, and the accelerating operation amount is equal to or more than a predetermined accelerating operation amount.
    Type: Application
    Filed: March 26, 2010
    Publication date: February 23, 2012
    Applicants: ADVICS CO., LTD., AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Seiji Hidaka, Yoshiyuki Yasui, Keita Nakano, Chihiro Nitta
  • Publication number: 20100102521
    Abstract: A roll rigidity controlling apparatus includes a positional information obtaining means for obtaining a positional information of a vehicle, a gradient information obtaining means for obtaining a gradient information relating to a gradient of a road existing ahead of the vehicle, and a roll rigidity distribution changing means for changing a roll rigidity distribution ratio between a front portion and a rear portion of the vehicle on the basis of the positional information obtained by the positional information obtaining means and the gradient information obtained by the gradient information obtaining means before the vehicle reaches a point at which the gradient of the road changes.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 29, 2010
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Seiji HIDAKA, Takayuki Miyajima