Patents by Inventor Toshikazu Ono
Toshikazu Ono 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: 10737681Abstract: In a drive unit including a motor, an inverter, a first electric storage device, a step up-down converter, first and second capacitors, a DC-DC converter, and a relay, the DC-DC converter is driven, while a target duty ratio of the step up-down converter is set such that a total loss of the step up-down converter and the DC-DC converter becomes larger than a maximum loss value of the step up-down converter, and the step up-down converter is controlled, when the relay is turned off to discharge charge of the first capacitor and the second capacitor.Type: GrantFiled: December 22, 2017Date of Patent: August 11, 2020Assignee: DENSO CORPORATIONInventor: Toshikazu Ono
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Publication number: 20180178775Abstract: In a drive unit including a motor, an inverter, a first electric storage device, a step up-down converter, first and second capacitors, a DC-DC converter, and a relay, the DC-DC converter is driven, while a target duty ratio of the step up-down converter is set such that a total loss of the step up-down converter and the DC-DC converter becomes larger than a maximum loss value of the step up-down converter, and the step up-down converter is controlled, when the relay is turned off to discharge charge of the first capacitor and the second capacitor.Type: ApplicationFiled: December 22, 2017Publication date: June 28, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Toshikazu ONO
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Patent number: 9998039Abstract: A drive control system includes a battery, a direct current/direct current converter, a first motor, a second motor, and a controller. The battery is a direct-current power supply. The direct current/direct current converter is connected to the battery. The first motor is connected to the direct current/direct current converter, and drives one of a front wheel and a rear wheel. The second motor is connected to the battery, and drives the other one of the front wheel and the rear wheel, which is different from the wheel that the first motor drives. The controller controls step-up operation of the direct current/direct current converter, and executes intermittent step-up control. When a required driving force of a vehicle changes during a stop of the direct current/direct current converter through the intermittent step-up control, the second motor outputs an amount of change in the required driving force.Type: GrantFiled: April 27, 2015Date of Patent: June 12, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Toshikazu Ono
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Patent number: 9755564Abstract: An alternating current that is to be supplied to a motor generator is controlled by controlling an inverter using a target output of the motor generator and a result of detection of an angle-of-rotation sensor, and a voltage step-up is controlled in accordance with the target output of the motor generator. During operation of the motor generator, a stepped-up voltage obtained through the step-up converter is set to be higher (S13) when learning of the point of origin of the angle-of-rotation sensor has yet to be completed (S11), than when learning of the point of origin of the angle-of-rotation sensor has been completed. This eliminates malfunctions occurring in motor operation when learning of the point of origin of the angle-of-rotation sensor has yet to be completed.Type: GrantFiled: January 8, 2015Date of Patent: September 5, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventor: Toshikazu Ono
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Publication number: 20170117827Abstract: A drive control system includes a battery, a direct current/direct current converter, a first motor, a second motor, and a controller. The battery is a direct-current power supply. The direct current/direct current converter is connected to the battery. The first motor is connected to the direct current/direct current converter, and drives one of a front wheel and a rear wheel. The second motor is connected to the battery, and drives the other one of the front wheel and the rear wheel, which is different from the wheel that the first motor drives. The controller controls step-up operation of the direct current/direct current converter, and executes intermittent step-up control. When a required driving force of a vehicle changes during a stop of the direct current/direct current converter through the intermittent step-up control, the second motor outputs an amount of change in the required driving force.Type: ApplicationFiled: April 27, 2015Publication date: April 27, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Toshikazu ONO
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Patent number: 9553515Abstract: Proper control is performed even during a stuck abnormality of a current sensor 56 configured to detect a reactor current. A boosting converter 12 is controlled by feedback control of a boosted voltage of the boosting converter 12 and a reactor current, detected by the current sensor 56, of a reactor 54 in the boosting converter 12. When a variation of the reactor current is less than a predetermined current value, failure determination of the current sensor is performed and, if a variation of the pre-boosting voltage exceeds a predetermined voltage value, failure of the current sensor is determined.Type: GrantFiled: January 8, 2015Date of Patent: January 24, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventor: Toshikazu Ono
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Patent number: 9438116Abstract: A boost converter device includes a converter, a current sensor which detects a reactor current flowing through a reactor, and a control unit which controls the converter by using feedback control of the reactor current. The control unit executes at least one of reducing a carrier frequency which is used in the control of the converter and reducing a duty command value which is used in the control of the converter, detects an amplitude of current ripple by the current sensor during execution of the reduction of the carrier frequency or the reduction of the duty command value, and detects the current sensor as being abnormal in a case where the amplitude of the current ripple is less than a predetermined current fluctuation range at the time of abnormality of the current sensor.Type: GrantFiled: May 6, 2015Date of Patent: September 6, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshikazu Ono, Daigo Nobe
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Publication number: 20150326124Abstract: A boost converter device includes a converter, a current sensor which detects a reactor current flowing through a reactor, and a control unit which controls the converter by using feedback control of the reactor current. The control unit executes at least one of reducing a carrier frequency which is used in the control of the converter and reducing a duty command value which is used in the control of the converter, detects an amplitude of current ripple by the current sensor during execution of the reduction of the carrier frequency or the reduction of the duty command value, and detects the current sensor as being abnormal in a case where the amplitude of the current ripple is less than a predetermined current fluctuation range at the time of abnormality of the current sensor.Type: ApplicationFiled: May 6, 2015Publication date: November 12, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshikazu ONO, Daigo NOBE
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Publication number: 20150207448Abstract: An alternating current that is to be supplied to a motor generator is controlled by controlling an inverter using a target output of the motor generator and a result of detection of an angle-of-rotation sensor, and a voltage step-up is controlled in accordance with the target output of the motor generator. During operation of the motor generator, a stepped-up voltage obtained through the step-up converter is set to be higher (S13) when learning of the point of origin of the angle-of-rotation sensor has yet to be completed (S11), than when learning of the point of origin of the angle-of-rotation sensor has been completed. This eliminates malfunctions occurring in motor operation when learning of the point of origin of the angle-of-rotation sensor has yet to be completed.Type: ApplicationFiled: January 8, 2015Publication date: July 23, 2015Inventor: Toshikazu Ono
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Publication number: 20150207410Abstract: Proper control is performed even during a stuck abnormality of a current sensor 56 configured to detect a reactor current. A boosting converter 12 is controlled by feedback control of a boosted voltage of the boosting converter 12 and a reactor current, detected by the current sensor 56, of a reactor 54 in the boosting converter 12. When a variation of the reactor current is less than a predetermined current value, failure determination of the current sensor is performed and, if a variation of the pre-boosting voltage exceeds a predetermined voltage value, failure of the current sensor is determined.Type: ApplicationFiled: January 8, 2015Publication date: July 23, 2015Inventor: Toshikazu Ono
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Patent number: 8558500Abstract: A control system for an AC motor determines a slope Ktl of a tangent TL at an operating point Pa corresponding to the current motor operating state and voltage phase (?0) on a torque characteristic curve that is plotted according to a torque equation representing an output torque characteristic with respect to the motor operating state and the voltage phase of the rectangular wave voltage. The control system further calculates a voltage phase change amount ?ff for use in feed-forward control, according to ?Ttl/Ktl obtained by dividing a torque compensation amount ?Ttl for feed-forward control by the slope Ktl.Type: GrantFiled: November 3, 2009Date of Patent: October 15, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshifumi Yamakawa, Kenji Yamada, Toshikazu Ono
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Patent number: 8497646Abstract: An AC electric motor, an inverter and a controller are mounted on an electric powered vehicle. The controller includes a voltage deviation calculating unit, a modulation factor calculating unit, and a mode switching determination unit. The voltage deviation calculating unit calculates a voltage deviation between a first voltage command when the rectangular wave voltage control is executed and a second voltage command when pulse width modulation control is executed, by inputting a current deviation to a voltage equation of the AC electric motor. Modulation factor calculating unit calculates the modulation factor based on the first voltage command and the voltage deviation. The mode switching determination unit determines whether or not control mode of the AC electric motor from the rectangular wave voltage control to the pulse width modulation control is necessary, based on the modulation factor.Type: GrantFiled: February 23, 2009Date of Patent: July 30, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kenji Yamada, Toshifumi Yamakawa, Toshikazu Ono, Yutaka Kuromatsu
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Patent number: 8421468Abstract: A converter control unit responds to a command from a start determining unit to control a converter such that a ripple current is generated at a secondary battery. A storage unit stores a map defining a correlative relationship between the temperature and current of the secondary battery and internal resistance. An estimating unit estimates a value of internal resistance of the secondary battery based on each detection value of the temperature and current, and the map stored in the storage unit.Type: GrantFiled: October 8, 2010Date of Patent: April 16, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Ono, Hichirosai Oyobe
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Publication number: 20120274688Abstract: A liquid ejecting head is provided in which a conductive plate is provided between a piezoelectric vibrator and a pressure chamber, and the conductive plate and the piezoelectric vibrator are electrically insulated from each other. By applying a voltage to the conductive plate, the ink ejected from the nozzles is positively charged, and mist generated by dividing the ink during flight is collected by a mist absorbing member of a mist collecting unit.Type: ApplicationFiled: April 23, 2012Publication date: November 1, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Toshiya OKADA, Yoichi YAMADA, Masaru KOBASHI, Toshikazu ONO
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Patent number: 8252497Abstract: A toner, has a number mode diameter of 3 ?m or more and 6 ?m or lower and a particle size distribution of a toner including an externally-applied agent in the range of 0.6 ?m to 400 ?m in which the number frequency of a toner smaller than the number mode diameter is smaller than the number frequency of a toner equal to or larger than the number mode diameter.Type: GrantFiled: April 12, 2010Date of Patent: August 28, 2012Assignee: Seiko Epson CorporationInventors: Soichi Yamazaki, Takatomo Fukumoto, Hideki Okada, Toshikazu Ono
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Patent number: 8148927Abstract: A control apparatus for an alternating-current motor that is driven by an inverter includes a rectangular wave voltage control portion that generates a control command of the inverter such that rectangular wave voltage that has been phase-controlled to make the alternating-current motor operate according to a torque command value is applied to the alternating-current motor; and a phase change control portion that controls a change in the phase to maintain the center of a flux linkage vector locus indicative of a change in a flux linkage of the alternating-current motor before and after a change in the phase of the rectangular wave voltage.Type: GrantFiled: January 25, 2010Date of Patent: April 3, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Ono, Kenji Yamada, Toshifumi Yamakawa
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Publication number: 20110273125Abstract: An AC electric motor, an inverter and a controller are mounted on an electric powered vehicle. The controller includes a voltage deviation calculating unit, a modulation factor calculating unit, and a mode switching determination unit. The voltage deviation calculating unit calculates a voltage deviation between a first voltage command when the rectangular wave voltage control is executed and a second voltage command when pulse width modulation control is executed, by inputting a current deviation to a voltage equation of the AC electric motor. Modulation factor calculating unit calculates the modulation factor based on the first voltage command and the voltage deviation. The mode switching determination unit determines whether or not control mode of the AC electric motor from the rectangular wave voltage control to the pulse width modulation control is necessary, based on the modulation factor.Type: ApplicationFiled: February 23, 2009Publication date: November 10, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji Yamada, Toshifumi Yamakawa, Toshikazu Ono, Yutaka Kuromatsu
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Publication number: 20110248663Abstract: A control system for an AC motor determines a slope Ktl of a tangent TL at an operating point Pa corresponding to the current motor operating state and voltage phase (?0) on a torque characteristic curve that is plotted according to a torque equation representing an output torque characteristic with respect to the motor operating state and the voltage phase of the rectangular wave voltage. The control system further calculates a voltage phase change amount ?ff for use in feed-forward control, according to ?Ttl/Ktl obtained by dividing a torque compensation amount ?Ttl for feed-forward control by the slope Ktl.Type: ApplicationFiled: November 3, 2009Publication date: October 13, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshifumi Yamakawa, Kenji Yamada, Toshikazu Ono
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Publication number: 20110133744Abstract: A converter control unit responds to a command from a start determining unit to control a converter such that a ripple current is generated at a secondary battery. A storage unit stores a map defining a correlative relationship between the temperature and current of the secondary battery and internal resistance. An estimating unit estimates a value of internal resistance of the secondary battery based on each detection value of the temperature and current, and the map stored in the storage unit.Type: ApplicationFiled: October 8, 2010Publication date: June 9, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshikazu Ono, Hichirosai Oyobe
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Publication number: 20100261110Abstract: A toner, has a number mode diameter of 3 ?m or more and 6 ?m or lower and a particle size distribution of a toner including an externally-applied agent in the range of 0.6 ?m to 400 ?m in which the number frequency of a toner smaller than the number mode diameter is smaller than the number frequency of a toner equal to or larger than the number mode diameter.Type: ApplicationFiled: April 12, 2010Publication date: October 14, 2010Applicant: Seiko Epson CorporationInventors: Soichi YAMAZAKI, Takatomo FUKUMOTO, Hideki OKADA, Toshikazu ONO