Patents by Inventor Hoshihito OKADA
Hoshihito OKADA 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: 11220183Abstract: A driver controls a switch inserted in a current path between a secondary battery and an inverter that drives a motor. A first abnormality detector instructs the driver to turn off the switch when an abnormality of the secondary battery is detected. A second abnormality detector is disposed in parallel with the first abnormality detector, and instructs the driver to turn off the switch when the abnormality of the secondary battery is detected. The first abnormality detector suspends an instruction to turn off the switch to the driver, even when the abnormality of the secondary battery is detected, in cases where an ECU instructs discharge-stop prohibition of the secondary battery. The second abnormality detector instructs the driver to turn off the switch after a lapse of a certain time from when the abnormality of the secondary battery is detected, regardless of an instruction from the ECU.Type: GrantFiled: January 2, 2020Date of Patent: January 11, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hiroshi Takao, Noriharu Kobayashi, Hoshihito Okada
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Publication number: 20200130509Abstract: A driver controls a switch inserted in a current path between a secondary battery and an inverter that drives a motor. A first abnormality detector instructs the driver to turn off the switch when an abnormality of the secondary battery is detected. A second abnormality detector is disposed in parallel with the first abnormality detector, and instructs the driver to turn off the switch when the abnormality of the secondary battery is detected. The first abnormality detector suspends an instruction to turn off the switch to the driver, even when the abnormality of the secondary battery is detected, in cases where an ECU instructs discharge-stop prohibition of the secondary battery. The second abnormality detector instructs the driver to turn off the switch after a lapse of a certain time from when the abnormality of the secondary battery is detected, regardless of an instruction from the ECU.Type: ApplicationFiled: January 2, 2020Publication date: April 30, 2020Inventors: Hiroshi TAKAO, Noriharu KOBAYASHI, Hoshihito OKADA
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Patent number: 10576827Abstract: A driver controls a switch inserted in a current path between a secondary battery and an inverter that drives a motor. A first abnormality detector instructs the driver to turn off the switch when an abnormality of the secondary battery is detected. A second abnormality detector is disposed in parallel with the first abnormality detector, and instructs the driver to turn off the switch when the abnormality of the secondary battery is detected. The first abnormality detector suspends an instruction to turn off the switch to the driver, even when the abnormality of the secondary battery is detected, in cases where an ECU instructs discharge-stop prohibition of the secondary battery. The second abnormality detector instructs the driver to turn off the switch after a lapse of a certain time from when the abnormality of the secondary battery is detected, regardless of an instruction from the ECU.Type: GrantFiled: April 7, 2016Date of Patent: March 3, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hiroshi Takao, Noriharu Kobayashi, Hoshihito Okada
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Publication number: 20180093569Abstract: A driver controls a switch inserted in a current path between a secondary battery and an inverter that drives a motor. A first abnormality detector instructs the driver to turn off the switch when an abnormality of the secondary battery is detected. A second abnormality detector is disposed in parallel with the first abnormality detector, and instructs the driver to turn off the switch when the abnormality of the secondary battery is detected. The first abnormality detector suspends an instruction to turn off the switch to the driver, even when the abnormality of the secondary battery is detected, in cases where an ECU instructs discharge-stop prohibition of the secondary battery. The second abnormality detector instructs the driver to turn off the switch after a lapse of a certain time from when the abnormality of the secondary battery is detected, regardless of an instruction from the ECU.Type: ApplicationFiled: April 7, 2016Publication date: April 5, 2018Inventors: Hiroshi TAKAO, Noriharu KOBAYASHI, Hoshihito OKADA
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Patent number: 9876459Abstract: A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.Type: GrantFiled: May 1, 2017Date of Patent: January 23, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yoshinori Hayashi, Hoshihito Okada, Yoshihiko Maeda, Yoichi Enomoto, Hiroshi Takao
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Publication number: 20170237382Abstract: A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.Type: ApplicationFiled: May 1, 2017Publication date: August 17, 2017Inventors: Yoshinori HAYASHI, Hoshihito OKADA, Yoshihiko MAEDA, Yoichi ENOMOTO, Hiroshi TAKAO
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Patent number: 9673746Abstract: A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.Type: GrantFiled: February 29, 2016Date of Patent: June 6, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yoshinori Hayashi, Hoshihito Okada, Yoshihiko Maeda, Yoichi Enomoto, Hiroshi Takao
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Publication number: 20160181965Abstract: A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.Type: ApplicationFiled: February 29, 2016Publication date: June 23, 2016Inventors: Yoshinori HAYASHI, Hoshihito OKADA, Yoshihiko MAEDA, Yoichi ENOMOTO, Hiroshi TAKAO
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Patent number: 9312797Abstract: A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.Type: GrantFiled: March 14, 2013Date of Patent: April 12, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshinori Hayashi, Hoshihito Okada, Yoshihiko Maeda, Yoichi Enomoto, Hiroshi Takao
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Patent number: 9236827Abstract: A motor drive circuit comprises: a DC power supply; power supply lines; an inverter which has upper arm switch elements and lower arm switch elements; and a detection unit for detecting, based on a power state on the previous stage side of the inverter, the insulation resistances of the motor drive circuit and the motor. The detection unit performs a first detection operation for detecting the insulation resistances by using the output of the DC power supply while the upper arm switch elements and the lower arm switch elements are all turned off and a second detection operation for detecting the insulation resistances by using the output of the DC power supply while the elements of one of the upper arm switch elements and the lower arm switch elements are all turned off and at least one of the elements of the other one is turned on.Type: GrantFiled: May 15, 2012Date of Patent: January 12, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yoichi Enomoto, Hiroshi Takao, Yoshihiko Maeda, Hoshihito Okada
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Publication number: 20150084551Abstract: A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.Type: ApplicationFiled: March 14, 2013Publication date: March 26, 2015Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yoshinori Hayashi, Hoshihito Okada, Yoshihiko Maeda, Yoichi Enomoto, Hiroshi Takao
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Publication number: 20140152224Abstract: A motor drive circuit comprises: a DC power supply; power supply lines; an inverter which has upper arm switch elements and lower arm switch elements; and a detection unit for detecting, based on a power state on the previous stage side of the inverter, the insulation resistances of the motor drive circuit and the motor. The detection unit performs a first detection operation for detecting the insulation resistances by using the output of the DC power supply while the upper arm switch elements and the lower arm switch elements are all turned off and a second detection operation for detecting the insulation resistances by using the output of the DC power supply while the elements of one of the upper arm switch elements and the lower arm switch elements are all turned off and at least one of the elements of the other one is turned on.Type: ApplicationFiled: May 15, 2012Publication date: June 5, 2014Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yoichi Enomoto, Hiroshi Takao, Yoshihiko Maeda, Hoshihito Okada
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Publication number: 20120074884Abstract: An inverter device of the present invention includes: an inverter circuit portion that has a plurality of switching elements and that converts direct-current power into alternating-current power; and a temperature detection sensor that detects the temperature of the switching elements, in which, in the inverter circuit portion, a plurality of the switching elements on each of an upper side arm and a lower side arm corresponding to each phase are connected in parallel, and the temperature detection sensor is arranged in an intermediate position between the switching elements connected in parallel.Type: ApplicationFiled: September 23, 2011Publication date: March 29, 2012Applicant: SANYO Electric Co., Ltd.Inventors: Hoshihito OKADA, Yoshihiko Maeda, Hiroshi Takao, Yoichi Enomoto