Patents by Inventor Hideto Hanada

Hideto Hanada 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: 8018195
    Abstract: An AC motor drive control device includes a control mode judgment unit that performs a judgment based on required voltage amplitude required by a synchronous AC motor, in order to switch units for applying voltage to the AC motor to one of a rectangular wave voltage phase control unit, an overmodulation control unit, and a PWM current control unit.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: September 13, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Ohtani, Makoto Nakamura, Kenji Yamada, Masaki Okamura, Hideto Hanada
  • Patent number: 7973505
    Abstract: When an electric vehicle outputs a torque instruction, firstly, a request torque is acquired and a judged whether the acquired request torque is positive or negative (S10) Regardless of the sign of the request torque, it is judged whether the eco-switch is ON (S12, S14) If the request torque has a positive sign and the eco-switch is OFF, a map A is selected (S20). If the eco-switch is ON, a map B which limits the maximum torque to a low value for the map A is selected (S22). If the request torque has a negative sign, a map C is selected regardless of the eco-switch ON/OFF state and the maximum torque is not limited (S24).
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: July 5, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
    Inventors: Masayoshi Suhama, Hideto Hanada, Masaki Okamura, Hiroaki Kioka, Ken Iwatsuki
  • Patent number: 7911177
    Abstract: An overmodulation PWM controller includes a voltage instruction calculation unit which calculates a d axis voltage instruction and a q axis voltage instruction in which a voltage amplitude exceeds a peak value of a triangular wave carrier; a voltage instruction correction unit which corrects the d axis voltage instruction and the q axis voltage instruction so that a pulse width modulation voltage applied to an AC motor has a fundamental wave amplitude corresponding to the voltage instruction amplitude, according to the synchronization value K which is the number of the triangular carriers per one cycle of the phase voltage instruction; and a voltage instruction conversion unit which converts the corrected d axis voltage instruction and the q axis voltage instruction into a phase voltage instruction. The pulse width modulation voltage is controlled according to the result of comparison between the phase voltage instruction and the triangular wave carrier.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: March 22, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Ohtani, Hideto Hanada, Makoto Nakamura, Kenji Yamada
  • Patent number: 7911162
    Abstract: A motor drive device (100) includes a boost converter (12) boosting a power supply voltage and outputting a boosted voltage; an inverter (14) receiving the boosted voltage from the boost converter (12) and driving a motor (M1); and a controller (30) giving a target value of the boosted voltage to the boost converter (12) and setting one of a rectangular-wave control and a non-rectangular-wave control as a control method of the inverter (14). The controller (30) is capable of selecting from a first operation mode for giving a first boosted target value and designating the non-rectangular-wave control as the control method and a second operation mode for giving a second boosted target value lower than the first boosted target value and designating the rectangular-wave control as the control method, in response to a same predetermined input signal indicating a torque request.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: March 22, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hideto Hanada
  • Publication number: 20110006598
    Abstract: A vehicle includes a converter for stepping up power provided from a power storage device, and an inverter for converting the power output from converter and outputting it to an alternating-current motor for driving the vehicle. In the vehicle, a rectangular voltage control unit controls the inverter by means of rectangular wave voltage control that is based on a torque command value and the like, so as to control an output torque of the alternating-current motor. A system voltage control unit controls a system voltage, which is an output voltage of the converter. The system voltage control unit lifts a restriction on a system voltage command value based on an accelerator pedal position and the like, and then increases it. When increasing the system voltage command value during the rectangular wave voltage control for the inverter, a cooperative control unit increases the system voltage command value and the torque command value in a cooperative manner.
    Type: Application
    Filed: December 22, 2008
    Publication date: January 13, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshifumi Yamakawa, Hideto Hanada, Kazuhito Hayashi, Masayoshi Suhama, Toshiya Hashimoto
  • Publication number: 20110006723
    Abstract: In the hybrid vehicle, a boost converter is controlled to make a post-boost voltage or a voltage on the side of an inverter become a target post-boost voltage corresponding to a target operation point of a motor in accordance with a target post-boost voltage setting map that divides an operation region of the motor into a non-boost region and a boost region when a operation point of the motor is included in the boost region. The target post-boost voltage setting map is prepared so that the non-boost region includes a region in which a loss produced by driving the motor when not boosting the post-boost voltages becomes smaller than the loss produced when boosting the post-boost voltage and the boost region includes a region in which the loss produced when boosting the post-boost voltage becomes smaller than the loss produced when not boosting the post-boost voltage.
    Type: Application
    Filed: December 19, 2008
    Publication date: January 13, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshifumi Yamakawa, Hideto Hanada, Kazuhito Hayashi, Masayoshi Suhama, Masaki Okamura
  • Patent number: 7828093
    Abstract: A controller for a vehicle including at least one motor driving wheels, an inverter driving the motor, and a boosting converter supplying a dc power supply current to the inverter, is provided with a control portion performing rectangular wave control and non-rectangular wave control on the inverter in a switched manner. The control portion has an emergency switching condition for switching control from the rectangular wave control to the non-rectangular wave control, as a determination reference, and when the emergency switching condition is satisfied while the rectangular wave control is being executed (YES at step S5), the control portion instructs the boosting converter to lower target output voltage (S7). Preferably, the control portion determines that the emergency switching condition is satisfied when a q-axis current supplied from the inverter to the motor exceeds a prescribed threshold value.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: November 9, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideto Hanada, Sojiro Yokoyama
  • Publication number: 20100270955
    Abstract: There is provided a motor drive control device which allows an improvement in fuel efficiency in terms of electric power while preventing the battery voltage from falling below the lower limit as rectangular wave control is performed. A motor drive control device 10 includes a battery B, a converter 12, an inverter 16, and a control section 20 for outputting control signals to the converter 12 and the inverter 16. The control section 20 has a first map and a second map regarding control of the alternating-current motor. The first map is a map in which a step-up starting point of the converter 12 is set in a higher revolution range than that in the second map, and which thus includes a relatively large rectangular wave control region a3, and the second map is a map for mainly performing pulse width modulation control.
    Type: Application
    Filed: January 23, 2009
    Publication date: October 28, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshifumi Yamakawa, Hideto Hanada, Kazuhito Hayashi, Masayoshi Suhama
  • Publication number: 20100231151
    Abstract: An AC motor drive control device includes a control mode judgment unit that performs a judgment based on required voltage amplitude required by a synchronous AC motor, in order to switch units for applying voltage to the AC motor to one of a rectangular wave voltage phase control unit, an overmodulation control unit, and a PWM current control unit.
    Type: Application
    Filed: March 27, 2007
    Publication date: September 16, 2010
    Inventors: Hiroki Ohtani, Makoto Nakamura, Kenji Yamada, Masaki Okamura, Hideto Hanada
  • Publication number: 20100224428
    Abstract: When request power required of a power supply device by a driving force generation unit is close to zero, a converter ECU controls first and second converters to prohibit respective amounts of current passage in the first and second converters from simultaneously becoming close to zero. That is, when the request power is close to zero, the converter ECU performs voltage control of the first converter and sets an electric power control value for the second converter subjected to current control (electric power control) to a nonzero value, such that electric power is supplied and received between the first and second converters.
    Type: Application
    Filed: September 26, 2008
    Publication date: September 9, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenji Yamada, Hideto Hanada, Satoru Katoh, Hideaki Saida
  • Publication number: 20100185350
    Abstract: A carrier frequency setting unit (64) sets a carrier frequency (FC) according to the torque command (TR) of a motor generator and the number of motor rotations (MRN). A PWM signal generation unit (68) generates phase modulation waves corresponding to respective phase voltage commands (Vu, Vv, Vw) and generates phase PWM signals (Pu, Pv, Pw) according to the magnitude relationship between each of the phase modulation waves and a carrier wave having the carrier frequency (FC). A PWM center control unit (66), when the carrier frequency (FC) is lower than a predetermined frequency, generates a PWM center correction value (?CE) for variably controlling a PWM center and outputs to the PWM signal generation unit (68).
    Type: Application
    Filed: December 22, 2008
    Publication date: July 22, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Okamura, Natsuki Nozawa, Hideto Hanada
  • Publication number: 20100127656
    Abstract: An overmodulation PWM controller includes a voltage instruction calculation unit which calculates a d axis voltage instruction and a q axis voltage instruction in which a voltage amplitude exceeds a peak value of a triangular wave carrier; a voltage instruction correction unit which corrects the d axis voltage instruction and the q axis voltage instruction so that a pulse width modulation voltage applied to an AC motor has a fundamental wave amplitude corresponding to the voltage instruction amplitude, according to the synchronization value K which is the number of the triangular carriers per one cycle of the phase voltage instruction; and a voltage instruction conversion unit which converts the corrected d axis voltage instruction and the q axis voltage instruction into a phase voltage instruction. The pulse width modulation voltage is controlled according to the result of comparison between the phase voltage instruction and the triangular wave carrier.
    Type: Application
    Filed: June 18, 2008
    Publication date: May 27, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Ohtani, Hideto Hanada, Makoto Nakamura, Kenji Yamada
  • Publication number: 20100052588
    Abstract: By the vehicle controller of the present invention, when the economy mode is selected by a driver, boosting by a converter is limited and output torque of a motor is limited. Even in the economy mode, however, if the driver requests large torque, either the limit on boosting or the limit on output torque is cancelled. As a result, a vehicle controller for a vehicle including a battery, a converter boosting/lowering the battery voltage and a motor operating with the power from the converter is provided, by which unnecessary power consumption is reduced and the torque requested by the driver can be generated.
    Type: Application
    Filed: May 19, 2008
    Publication date: March 4, 2010
    Applicants: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Masaki Okamura, Hideto Hanada, Masayoshi Suhama, Yuki Sugiyama, Ken Iwatsuki
  • Publication number: 20100045224
    Abstract: When an electric vehicle outputs a torque instruction, firstly, a request torque is acquired and a judged whether the acquired request torque is positive or negative (S10) Regardless of the sign of the request torque, it is judged whether the eco-switch is ON (S12, S14) If the request torque has a positive sign and the eco-switch is OFF, a map A is selected (S20). If the eco-switch is ON, a map B which limits the maximum torque to a low value for the map A is selected (S22). If the request torque has a negative sign, a map C is selected regardless of the eco-switch ON/OFF state and the maximum torque is not limited (S24).
    Type: Application
    Filed: January 31, 2008
    Publication date: February 25, 2010
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD
    Inventors: Masayoshi Suhama, Hideto Hanada, Masaki Okamura, Hiroaki Kioka, Ken Iwatsuki
  • Publication number: 20090309528
    Abstract: A plurality of current sensors are provided to correspond to a plurality of inverter circuits for driving a plurality of motor generators, respectively. Zero point adjustment of each current sensor is executed in a non-energized state recognized based on a stop of operation of the corresponding inverter circuit and when noise influence is determined to be small based on stops of operations of the other inverter circuits in the same casing. As a result, it is possible to avoid a risk of performing the zero point adjustment in a state in which an output of the current sensor is not exactly a value corresponding to zero current due to the noise influence from the other inverter circuits. In this way, it is possible to highly accurately execute the zero point adjustment of the current sensor for measuring motor driving current.
    Type: Application
    Filed: August 10, 2006
    Publication date: December 17, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideto Hanada, Hiroyuki Oyanagi
  • Publication number: 20090237019
    Abstract: When a target operation point of either a motor MG1 or a motor MG2 is included in a resonance range specified by operation points of the motor MG1 or the motor MG2 in the occurrence of resonance in a booster converter, a hybrid vehicle controls the booster converter to make the voltage on the side of inverters approach to a preset target boosted voltage that is higher than the voltage on the side of the battery, while controlling the inverters by sine-wave control.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 24, 2009
    Inventors: Toshifumi YAMAKAWA, Kazuhito HAYASHI, Masayoshi SUHAMA, Hideto HANADA
  • Publication number: 20090159350
    Abstract: A controller for a vehicle including at least one motor driving wheels, an inverter driving the motor, and a boosting converter supplying a dc power supply current to the inverter, is provided with a control portion performing rectangular wave control and non-rectangular wave control on the inverter in a switched manner. The control portion has an emergency switching condition for switching control from the rectangular wave control to the non-rectangular wave control, as a determination reference, and when the emergency switching condition is satisfied while the rectangular wave control is being executed (YES at step S5), the control portion instructs the boosting converter to lower target output voltage (S7). Preferably, the control portion determines that the emergency switching condition is satisfied when a q-axis current supplied from the inverter to the motor exceeds a prescribed threshold value.
    Type: Application
    Filed: August 24, 2006
    Publication date: June 25, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideto Hanada, Sojiro Yokoyama
  • Publication number: 20090121669
    Abstract: A motor drive device (100) includes a boost converter (12) boosting a power supply voltage and outputting a boosted voltage; an inverter (14) receiving the boosted voltage from the boost converter (12) and driving a motor (M1); and a controller (30) giving a target value of the boosted voltage to the boost converter (12) and setting one of a rectangular-wave control and a non-rectangular-wave control as a control method of the inverter (14). The controller (30) is capable of selecting from a first operation mode for giving a first boosted target value and designating the non-rectangular-wave control as the control method and a second operation mode for giving a second boosted target value lower than the first boosted target value and designating the rectangular-wave control as the control method, in response to a same predetermined input signal indicating a torque request.
    Type: Application
    Filed: May 1, 2007
    Publication date: May 14, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hideto Hanada
  • Publication number: 20090025992
    Abstract: In response to a starting instruction of an engine 22 at a gearshift position of a gearshift lever 81 set to a parking position, the engine 22 and motors MG1 and MG2 are controlled to motor and start the engine 22 with output of a torque from the motor MG2 to keep a rotational position of a rotor in the motor MG2 at a preset reference position. This arrangement enables the engine 22 to be motored and started even in the state of separation of a ring gear shaft 32a from a driveshaft 36 by means of a transmission 60 and locking of drive wheels 39a and 39b by means of a parking lock mechanism 90.
    Type: Application
    Filed: February 23, 2007
    Publication date: January 29, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhito Hayashi, Masaki Okamura, Hideto Hanada
  • Patent number: 7301245
    Abstract: A control system for a vehicle power supply for supplying power to a predetermined power receiving portion includes a first power generating power supply portion, second power generating power supply portion, and controller. The controller is arranged to set the voltage to be output to the power receiving portion from one of the power generating power supply portions in accordance with the output voltage of the other of the power generating power supply portions. With this arrangement, the power receiving portion is prevented from being supplied with an excessive amount of power, and when power regeneration is being performed by the second power generating power supply portion, the regenerated power is effectively used. Thus, the fuel economy of the vehicle can be increased.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: November 27, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masanori Sugiura, Hiroshi Tsujii, Ken Kuretake, Hideto Hanada, Takashi Kawai