Patents by Inventor Takahiro Kawata
Takahiro Kawata 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: 11708801Abstract: Provided is a load drive device capable of diagnosing a failure of an output terminal of the load drive device before a charging voltage stabilizes in a configuration in which a capacitor is connected to an output terminal of the load drive device that drives an inductive load. In the load drive device according to the present invention, a capacitor is connected between a load terminal and a ground terminal, and the presence or absence of a failure of the load terminal is diagnosed on the basis of a current flowing between an internal power supply included in a diagnosis circuit and the load terminal.Type: GrantFiled: January 24, 2020Date of Patent: July 25, 2023Assignee: Hitachi Astemo, Ltd.Inventors: Takuya Arafune, Takahiro Kawata, Takumi Masubuchi
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Publication number: 20220049669Abstract: Provided is a load drive device capable of diagnosing a failure of an output terminal of the load drive device before a charging voltage stabilizes in a configuration in which a capacitor is connected to an output terminal of the load drive device that drives an inductive load. In the load drive device according to the present invention, a capacitor is connected between a load terminal and a ground terminal, and the presence or absence of a failure of the load terminal is diagnosed on the basis of a current flowing between an internal power supply included in a diagnosis circuit and the load terminal.Type: ApplicationFiled: January 24, 2020Publication date: February 17, 2022Inventors: Takuya ARAFUNE, Takahiro KAWATA, Takumi MASUBUCHI
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Patent number: 10587263Abstract: Provided are a load drive apparatus in which a semiconductor chip using DTI for inter-element separation is mounted, the load drive apparatus being capable of diagnosing a dielectric strength voltage of the DTI and highly reliable and a failure diagnosis method of the load drive apparatus. There is provided a load drive apparatus in which a semiconductor chip is mounted. The semiconductor chip includes a load drive output unit formed on a semiconductor substrate. The load drive output unit has a first region where an MOSFET that controls load driving is formed and a second region insulated and separated by DTI from the first region and includes a first leakage current detection element provided in the first region, a second leakage current detection element provided in the second region, and a failure detection unit that determines a failure of the load drive output unit.Type: GrantFiled: November 6, 2017Date of Patent: March 10, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takahiro Kawata, Yoichiro Kobayashi, Mitsuhiko Watanabe
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Publication number: 20190305772Abstract: Provided are a load drive apparatus in which a semiconductor chip using DTI for inter-element separation is mounted, the load drive apparatus being capable of diagnosing a dielectric strength voltage of the DTI and highly reliable and a failure diagnosis method of the load drive apparatus. There is provided a load drive apparatus in which a semiconductor chip is mounted. The semiconductor chip includes a load drive output unit formed on a semiconductor substrate. The load drive output unit has a first region where an MOSFET that controls load driving is formed and a second region insulated and separated by DTI from the first region and includes a first leakage current detection element provided in the first region, a second leakage current detection element provided in the second region, and a failure detection unit that determines a failure of the load drive output unit.Type: ApplicationFiled: November 6, 2017Publication date: October 3, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takahiro KAWATA, Yoichiro KOBAYASHI, Mitsuhiko WATANABE
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Patent number: 9780773Abstract: Provided is a load drive slope control device that can reduce EMI noise, and power loss and heat generation when a drive transistor is turned on and off, and can prevent excessive high temperature-induced damage to the drive transistor at an excessive high temperature.Type: GrantFiled: December 13, 2013Date of Patent: October 3, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takahiro Kawata, Ryoichi Oura, Masahito Sonehara, Yoshitaka Abe, Takeo Yamashita
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Patent number: 9748537Abstract: There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.Type: GrantFiled: August 10, 2007Date of Patent: August 29, 2017Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Akihiko Emori, Youhei Kawahara, Takahiro Kawata, Akihiko Kudo
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Publication number: 20150381159Abstract: Provided is a load drive slope control device that can reduce EMI noise, and power loss and heat generation when a drive transistor is turned on and off, and can prevent excessive high temperature-induced damage to the drive transistor at an excessive high temperature.Type: ApplicationFiled: December 13, 2013Publication date: December 31, 2015Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takahiro KAWATA, Ryoichi OURA, Masahito SONEHARA, Yoshitaka ABE, Takeo YAMASHITA
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Patent number: 8240772Abstract: A seatbelt holding structure that comprises a seat body 10 on which a seater is seated, a seatbelt 20 that restrains the seater seated on the seat body 10, and a belt cover 40 as a belt holding unit that holds the seatbelt 20 in a direction in which a seating space of the seat body 10 is open.Type: GrantFiled: May 22, 2008Date of Patent: August 14, 2012Assignee: COMBI CorporationInventors: Takahiro Kawata, Shushi Hosoya
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Patent number: 8193763Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.Type: GrantFiled: February 10, 2011Date of Patent: June 5, 2012Assignee: Hitachi Vehicle Energy, Ltd.Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
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Publication number: 20120013403Abstract: An amplifier circuit is configured to be preceded by a single-ended-to-differential translate circuit using a BTL configuration operating at a low voltage and succeeded by amplifiers to amplify output signals VOT and VOB from the single-ended-to-differential translate circuit. The amplifier circuit activates a mute function of the subsequent amplifiers during state transition when the single-ended-to-differential translate circuit turns on. Consequently, the amplifier circuit fixes output signals OUTP and OUTN to 0 V and masks an output noise. The amplifier circuit inactivates the mute function after signals VOT and VOB become stable. Thereby, the amplifier circuit is capable of easily preventing a pop noise using a BTL configuration requested for high voltage output to drive a piezoelectric actuator.Type: ApplicationFiled: July 14, 2011Publication date: January 19, 2012Inventors: Ryusuke SAHARA, Satoshi UENO, Takahiro KAWATA
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Publication number: 20120013220Abstract: Disclosed is a piezoelectric actuator drive unit that includes a piezoelectric actuator drive amplifier and a piezoelectric actuator drive unit power supply. Combinations of high and low signal levels of a first control signal, which controls the supply voltage and amplifier bias voltage of the piezoelectric actuator drive amplifier, and a second control signal, which controls the driving force of the piezoelectric actuator drive amplifier, are associated with a haptic feedback function, a receiver function for generating an audio output, and a speaker function for generating music or the like. Thus, the piezoelectric actuator drive unit, which vibrates a piezoelectric actuator, is adapted to the haptic feedback function, the receiver function, and the speaker function, and can optimize its power and drive amplifier characteristics.Type: ApplicationFiled: July 14, 2011Publication date: January 19, 2012Inventors: Takahiro KAWATA, Ryusuke Sahara, Satoshi Ueno
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Publication number: 20110187326Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception, timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.Type: ApplicationFiled: February 10, 2011Publication date: August 4, 2011Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Takahiro KAWATA, Akihiko EMORI, Youhei KAWAHARA, Akihiko KUDO
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Patent number: 7952327Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.Type: GrantFiled: April 17, 2007Date of Patent: May 31, 2011Assignee: Hitachi Vehicle Energy, Ltd.Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
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Patent number: 7911178Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.Type: GrantFiled: January 24, 2008Date of Patent: March 22, 2011Assignee: Hitachi Vehicle Energy, Ltd.Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
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Publication number: 20100213696Abstract: [Problem to be Solved] The present invention has been achieved to provide a seatbelt holding structure that can increase the openness of a seating space by holding the entire seatbelt, and that can prevent tampering of an attachment by an infant or loss of the attachment. [Means for Solving Problem] The seatbelt holding structure comprises a seat body 10 on which a seater is seated, a seatbelt 20 that restrains the seater seated on the seat body 10, and a belt cover 40 as a belt holding unit that holds the seatbelt 20 in a direction in which a seating space of the seat body 10 is open. According to the invention, the seating space S in front of the seat body 10 can be maintained open without interposition of the seatbelts 20, and it is possible to prevent the non-fastened seatbelts 20 from being obstacle against seating action.Type: ApplicationFiled: May 22, 2008Publication date: August 26, 2010Applicant: Combi CorporationInventors: Takahiro Kawata, Shushi Hosoya
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Publication number: 20080219337Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.Type: ApplicationFiled: January 24, 2008Publication date: September 11, 2008Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
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Publication number: 20080076011Abstract: There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.Type: ApplicationFiled: August 10, 2007Publication date: March 27, 2008Inventors: Akihiko Emori, Youhei Kawahara, Takahiro Kawata, Akihiko Kudo
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Publication number: 20080054907Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.Type: ApplicationFiled: April 17, 2007Publication date: March 6, 2008Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
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Publication number: 20080030198Abstract: A communication means (105) of a battery monitoring device (101) receives setting information (measuring parameters) about the type or structure of a storage battery (102) to be monitored from a host system (106). A setting means (107) acquires the measuring parameters and performs setting for a measuring means (103) and a digital signal conversion means (104). In other words, the setting means (107) sets, in accordance with the type or structure of the storage battery (102), the measuring parameters (namely, the measuring time interval, the measuring channel number, the measurement range and the like) for the measuring means (103) and the digital signal conversion means (104). Thus, even when the type and construction of the storage battery (102) changes, state of charge and the like of the storage battery (102) can be accurately measured and monitored by the battery monitoring device (101).Type: ApplicationFiled: August 2, 2007Publication date: February 7, 2008Inventors: Takahiro KAWATA, Akihiko Emori, Youhei Kawahara, Hiroshi Arita
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Patent number: 7009246Abstract: To reduce the width of isolation between the first and second p channel MIS•FETs driven by different voltages, a first p channel MIS•FET driven by a first supply voltage and a second p channel MIS•FET driven by a second supply voltage higher than the first supply voltage are arranged in the same n well of the same semiconductor substrate, and the second supply voltage is supplied as a common well bias voltage to the n well.Type: GrantFiled: February 6, 2004Date of Patent: March 7, 2006Assignee: Hitachi, Ltd.Inventors: Takahiro Kawata, Shigeru Nakahara, Keiichi Higeta