Patents by Inventor Naoyoshi Takamatsu
Naoyoshi Takamatsu 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: 11881803Abstract: A control device for an electric vehicle, includes: a DC power supply; a three-phase AC motor; an inverter that converts DC power supplied from the DC power supply into AC power and outputs the AC power to the three-phase AC motor; and a control unit that controls the inverter to control an input voltage to the three-phase AC motor. Further, when a parameter correlated with the input voltage includes a predetermined high frequency component, the control unit performs correction of adding a component for canceling out the high frequency component to the input voltage, and controls the three-phase AC motor based on the corrected input voltage.Type: GrantFiled: January 11, 2022Date of Patent: January 23, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hirotsugu Ohata, Kaoru Domon, Naoyoshi Takamatsu
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Patent number: 11431184Abstract: A power supply device includes a storage battery, a capacitor unit connected to the storage battery, a power converter including three phases connected to the storage battery in parallel, a control device configured to control a switching on and off of switching elements included in the three phases respectively, a first connection terminal connected to a P terminal of a DC charger and located between first and second switching elements in any one of the three phases, and a second connection terminal connected to an N terminal of the DC charger and located between third and fourth switching elements in another one of the three phases.Type: GrantFiled: September 8, 2020Date of Patent: August 30, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoyoshi Takamatsu, Hirotsugu Ohata
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Patent number: 11411410Abstract: A charging device includes: a power supply circuit including a first inverter connected between a first storage battery and a load, and a second inverter connected between a second storage battery and the load, the power supply circuit being configured to drive the one load; a charging port configured to be connected to an external power supply when the first storage battery and the second storage battery are charged with power from the external power supply; and a relay configured to allow current to bypass the first inverter, the second inverter, and the load between a positive electrode terminal of the charging port and a negative electrode terminal of the charging port, when the first storage battery and the second storage battery are charged with the power from the external power supply.Type: GrantFiled: November 12, 2019Date of Patent: August 9, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka Niimi, Naoyoshi Takamatsu
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Publication number: 20220231630Abstract: A control device for an electric vehicle, includes: a DC power supply; a three-phase AC motor; an inverter that converts DC power supplied from the DC power supply into AC power and outputs the AC power to the three-phase AC motor; and a control unit that controls the inverter to control an input voltage to the three-phase AC motor. Further, when a parameter correlated with the input voltage includes a predetermined high frequency component, the control unit performs correction of adding a component for canceling out the high frequency component to the input voltage, and controls the three-phase AC motor based on the corrected input voltage.Type: ApplicationFiled: January 11, 2022Publication date: July 21, 2022Inventors: Hirotsugu OHATA, Kaoru DOMON, Naoyoshi TAKAMATSU
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Patent number: 11303146Abstract: A charging device includes: first and second capacitors connected in series between a positive electrode and a negative electrode of a storage battery; first and second switching elements each including a plurality of switching elements; first and second terminals; first and second changeover switches; and a control circuit controlling opening and closing of the first switching elements and the second switching elements to switch between a first state to charge the first capacitor with an external direct-current power source and a second state to charge the second capacitor with the external direct-current power source.Type: GrantFiled: September 8, 2020Date of Patent: April 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoyoshi Takamatsu, Hirotsugu Ohata, Takuya Sakamoto
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Patent number: 11207985Abstract: A power supply device includes a storage battery; a capacitor unit having first and second capacitor; a three phase power converter, connected in parallel with the storage battery, each phase having first to fourth switching elements in series; three connection terminals electrically connectable to a three-phase AC charger; and a control unit, in a case where the three connection terminals and the three-phase AC charger are electrically connected between the first switching elements and the second switching elements for the respective three phases in the three-level inverter, before the storage battery is charged by means of the three-phase AC charger, charging the first capacitor with use of the storage battery and setting voltage of the second capacitor to 0 V.Type: GrantFiled: August 12, 2020Date of Patent: December 28, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hirotsugu Ohata, Naoyoshi Takamatsu
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Patent number: 11158893Abstract: A battery heating device includes: a capacitor connected in parallel between a battery and a load; a reactor connected to the capacitor; a first switch connected to a terminal on the load side of the reactor, and to one terminal of the capacitor; a second switch connected to a terminal on the load side of the reactor, and to another terminal of the capacitor; a controller configured to control an ON/OFF state of the first switch and the second switch; and a current sensor configured to detect a direction and a current value of a reactor current flowing in the reactor. The controller performs battery heating mode control including a first control of turning OFF the first switch and turning ON the second switch when a current value becomes substantially zero from a state where the reactor current flows from the load side to the battery side.Type: GrantFiled: October 23, 2019Date of Patent: October 26, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Naoyoshi Takamatsu
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Patent number: 11063462Abstract: A charging apparatus includes: an electric power source circuit including a first inverter and a second inverter to drive one motor; and a charging port having a positive electrode terminal connected to a positive electrode side of a first storage battery, and a negative electrode terminal connected to a negative electrode side of a second storage battery. In the case where the battery charger outputs first electric power, the first storage battery and the second storage battery are connected in parallel when being charged with the first electric power. In the case where the battery charger outputs second electric power that is larger than the first electric power, the first storage battery and the second storage battery are connected in series when being charged with the second electric power.Type: GrantFiled: August 13, 2019Date of Patent: July 13, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka Niimi, Naoyoshi Takamatsu
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Patent number: 11052842Abstract: A vehicle control device includes: first and second power supplies, and a control unit controlling to, when a remaining capacity difference between the first power supply and the second power supply is large, to reduce a first operating range, in which the connection state with the electrical load is controlled to be series connection state of the power supplies, and increase a second operating range, in which the connection state with the electrical load is controlled to be the parallel connection state of the power supplies or the single connection state of one of the power supplies having a larger remaining capacity, as compared with a case where the remaining capacity difference is small.Type: GrantFiled: December 3, 2019Date of Patent: July 6, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka Niimi, Naoyoshi Takamatsu, Shunya Kobayashi, Satoru Ito, Takuya Sakamoto, Hirotsugu Ohata, Shigeaki Goto, Shuji Tomura, Naoki Yanagizawa
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Patent number: 11034258Abstract: A power supply of a vehicle includes a first switching element, a second switching element, a third switching element, a first battery, a reactor element, a second battery, a smoothing capacitor, and a controller. When the connection state of the first battery and the second battery is switched from the series connection state to the parallel connection state, the controller is configured to perform a transition control so that a voltage of the smoothing capacitor is decreased to the higher of a voltage of the first battery and a voltage of the second battery, and perform a switching control to turn on the first switching element after a diode of the first switching element is energized.Type: GrantFiled: November 4, 2019Date of Patent: June 15, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka Niimi, Naoyoshi Takamatsu, Shunya Kobayashi, Satoru Ito, Takuya Sakamoto, Hirotsugu Ohata, Naoki Yanagizawa, Shuji Tomura, Shigeaki Goto
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Publication number: 20210091573Abstract: A power supply device includes a storage battery, a capacitor unit connected to the storage battery, a power converter including three phases connected to the storage battery in parallel, a control device configured to control a switching on and off of switching elements included in the three phases respectively, a first connection terminal connected to a P terminal of a DC charger and located between first and second switching elements in any one of the three phases, and a second connection terminal connected to an N terminal of the DC charger and located between third and fourth switching elements in another one of the three phases.Type: ApplicationFiled: September 8, 2020Publication date: March 25, 2021Applicant: Toyota Jidosha Kabushiki KaishaInventors: Naoyoshi Takamatsu, Hirotsugu Ohata
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Publication number: 20210091585Abstract: A charging device includes: first and second capacitors connected in series between a positive electrode and a negative electrode of a storage battery; first and second switching elements each including a plurality of switching elements; first and second terminals; first and second changeover switches; and a control circuit controlling opening and closing of the first switching elements and the second switching elements to switch between a first state to charge the first capacitor with an external direct-current power source and a second state to charge the second capacitor with the external direct-current power source.Type: ApplicationFiled: September 8, 2020Publication date: March 25, 2021Inventors: Naoyoshi TAKAMATSU, Hirotsugu OHATA, Takuya SAKAMOTO
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Publication number: 20210078415Abstract: A power supply device includes a storage battery; a capacitor unit having first and second capacitor; a three phase power converter, connected in parallel with the storage battery, each phase having first to fourth switching elements in series; three connection terminals electrically connectable to a three-phase AC charger; and a control unit, in a case where the three connection terminals and the three-phase AC charger are electrically connected between the first switching elements and the second switching elements for the respective three phases in the three-level inverter, before the storage battery is charged by means of the three-phase AC charger, charging the first capacitor with use of the storage battery and setting voltage of the second capacitor to 0 V.Type: ApplicationFiled: August 12, 2020Publication date: March 18, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hirotsugu OHATA, Naoyoshi TAKAMATSU
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Patent number: 10923924Abstract: A power supply device of a vehicle includes a negative electrode terminal connected to a first battery; a positive electrode terminal connected to a second battery; a first positive electrode side relay between a first node and the first battery; a first capacitor connected between the first node and a negative line; a first negative electrode side relay between the first battery and the negative line; a first precharge relay and a first resistive element connected in parallel with the first negative electrode side relay; a second positive electrode side relay between a third node and the second battery; a second capacitor between the third node and a second node; a second negative electrode side relay between the second battery and the second node; and a second precharge relay and a second resistive element connected in parallel with the second positive electrode side relay.Type: GrantFiled: October 17, 2019Date of Patent: February 16, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunya Kobayashi, Yoshitaka Niimi, Naoyoshi Takamatsu, Satoru Ito, Takuya Sakamoto, Hirotsugu Ohata, Naoki Yanagizawa, Shuji Tomura, Shigeaki Goto
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Patent number: 10744897Abstract: A power-supply apparatus includes: an energy storage unit including energy storage modules; switches conducting or shutting off a current and switching a connection state of the storage modules; a voltage control unit switching a voltage of the energy storage unit; drive units, connected to the energy storage unit in series, driving respective external rotating electrical machines; and a capacitor connected to the drive units. Further, the power-supply apparatus includes a control unit that, when the voltage control unit switches the voltages of the energy storage unit, supplies electric power regenerated in the drive units to the capacitor and discharges the capacitor, and after an absolute value of a voltage difference between a post-switching voltage of the energy storage unit and a voltage of the capacitor is less than a predetermined value, controls so that the post-switching voltage of the energy storage unit is applied to the capacitor.Type: GrantFiled: August 21, 2018Date of Patent: August 18, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoyoshi Takamatsu, Yoshihiko Hiroe, Yoshitaka Niimi, Masaki Okamura
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Publication number: 20200198563Abstract: A vehicle control device includes: first and second power supplies, and a control unit controlling to, when a remaining capacity difference between the first power supply and the second power supply is large, to reduce a first operating range, in which the connection state with the electrical load is controlled to be series connection state of the power supplies, and increase a second operating range, in which the connection state with the electrical load is controlled to be the parallel connection state of the power supplies or the single connection state of one of the power supplies having a larger remaining capacity, as compared with a case where the remaining capacity difference is small.Type: ApplicationFiled: December 3, 2019Publication date: June 25, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka NIIMI, Naoyoshi TAKAMATSU, Shunya KOBAYASHI, Satoru ITO, Takuya SAKAMOTO, Hirotsugu OHATA, Shigeaki GOTO, Shuji TOMURA, Naoki YANAGIZAWA
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Publication number: 20200161878Abstract: A charging device includes: a power supply circuit including a first inverter connected between a first storage battery and a load, and a second inverter connected between a second storage battery and the load, the power supply circuit being configured to drive the one load; a charging port configured to be connected to an external power supply when the first storage battery and the second storage battery are charged with power from the external power supply; and a relay configured to allow current to bypass the first inverter, the second inverter, and the load between a positive electrode terminal of the charging port and a negative electrode terminal of the charging port, when the first storage battery and the second storage battery are charged with the power from the external power supply.Type: ApplicationFiled: November 12, 2019Publication date: May 21, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka NIIMI, Naoyoshi Takamatsu
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Publication number: 20200148074Abstract: A power supply of a vehicle includes a first switching element, a second switching element, a third switching element, a first battery, a reactor element, a second battery, a smoothing capacitor, and a controller. When the connection state of the first battery and the second battery is switched from the series connection state to the parallel connection state, the controller is configured to perform a transition control so that a voltage of the smoothing capacitor is decreased to the higher of a voltage of the first battery and a voltage of the second battery, and perform a switching control to turn on the first switching element after a diode of the first switching element is energized.Type: ApplicationFiled: November 4, 2019Publication date: May 14, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshitaka NIIMI, Naoyoshi TAKAMATSU, Shunya KOBAYASHI, Satoru ITO, Takuya SAKAMOTO, Hirotsugu OHATA, Naoki YANAGIZAWA, Shuji TOMURA, Shigeaki GOTO
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Publication number: 20200144684Abstract: A battery heating device includes: a capacitor connected in parallel between a battery and a load; a reactor connected to the capacitor; a first switch connected to a terminal on the load side of the reactor, and to one terminal of the capacitor; a second switch connected to a terminal on the load side of the reactor, and to another terminal of the capacitor; a controller configured to control an ON/OFF state of the first switch and the second switch; and a current sensor configured to detect a direction and a current value of a reactor current flowing in the reactor. The controller performs battery heating mode control including a first control of turning OFF the first switch and turning ON the second switch when a current value becomes substantially zero from a state where the reactor current flows from the load side to the battery side.Type: ApplicationFiled: October 23, 2019Publication date: May 7, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Naoyoshi TAKAMATSU
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Publication number: 20200127472Abstract: A power supply device of a vehicle includes a negative electrode terminal connected to a first battery; a positive electrode terminal connected to a second battery; a first positive electrode side relay between a first node and the first battery; a first capacitor connected between the first node and a negative line; a first negative electrode side relay between the first battery and the negative line; a first precharge relay and a first resistive element connected in parallel with the first negative electrode side relay; a second positive electrode side relay between a third node and the second battery; a second capacitor between the third node and a second node; a second negative electrode side relay between the second battery and the second node; and a second precharge relay and a second resistive element connected in parallel with the second positive electrode side relay.Type: ApplicationFiled: October 17, 2019Publication date: April 23, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunya KOBAYASHI, Yoshitaka NIIMI, Naoyoshi TAKAMATSU, Satoru ITO, Takuya SAKAMOTO, Hirotsugu OHATA, Naoki YANAGIZAWA, Shuji TOMURA, Shigeaki GOTO