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公开(公告)号：US09876459B2
公开(公告)日：2018-01-23
申请号：US15583605
申请日：2017-05-01
Inventor： Yoshinori Hayashi , Hoshihito Okada , Yoshihiko Maeda , Yoichi Enomoto , Hiroshi Takao
CPC classification number: H02P29/024 , B60L3/0069 , B60L11/1803 , B60L15/007 , B60L2200/12 , B60L2210/44 , B60Y2200/91 , H02M1/084 , H02M7/539 , H02P6/04 , H02P6/14 , H02P27/06 , Y02T10/642
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US09673746B2
公开(公告)日：2017-06-06
申请号：US15056665
申请日：2016-02-29
Inventor： Yoshinori Hayashi , Hoshihito Okada , Yoshihiko Maeda , Yoichi Enomoto , Hiroshi Takao
CPC classification number: H02P29/024 , B60L3/0069 , B60L11/1803 , B60L15/007 , B60L2200/12 , B60L2210/44 , B60Y2200/91 , H02M1/084 , H02M7/539 , H02P6/04 , H02P6/14 , H02P27/06 , Y02T10/642
Abstract: 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.
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公开(公告)号：US10411609B2
公开(公告)日：2019-09-10
申请号：US16207245
申请日：2018-12-03
Inventor： Junichi Yukawa , Yoshihiko Maeda , Satoshi Okawa
IPC: H02M7/00 , H02M3/335 , H03K17/687 , H03K17/0412 , H02M3/156
Abstract: The present disclosure reduces heat concentration on switching elements. A plurality of high-side transistors are connected in parallel to constitute high-side switching element. A plurality of low-side transistors are connected in parallel to constitute low-side switching element. The plurality of high-side transistors are arranged, one by one, next to the plurality of low-side transistors.
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公开(公告)号：US11251739B2
公开(公告)日：2022-02-15
申请号：US16876643
申请日：2020-05-18
Inventor： Yoshihiko Maeda , Hisazumi Watanabe , Yuji Aoki , Akitaka Yoshikawa
IPC: H02P1/00 , H02P29/024 , H02P27/08 , B60L15/20 , B60L53/20 , H02M7/5387
Abstract: A vehicle driving device includes an inverter which drives a motor. The inverter includes: a three-phase bridge circuit including a plurality of switching elements; a three-phase short circuit which short-circuits three phases of the motor via the three-phase bridge circuit; and a control circuit. The control circuit includes: a microprocessor which drives the three-phase bridge circuit; a malfunction notification circuit which outputs a malfunction notification signal when the microprocessor is malfunctioning; and a latch circuit which holds the malfunction notification signal outputted from the malfunction notification circuit. The control circuit outputs a three-phase short-circuit drive signal which drives the three-phase short circuit, based on the malfunction notification signal held by the latch circuit.
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公开(公告)号：US11095237B2
公开(公告)日：2021-08-17
申请号：US16703254
申请日：2019-12-04
Inventor： Junichi Yukawa , Naoya Iwasaki , Hisazumi Watanabe , Yoshihiko Maeda
Abstract: A vehicle driving apparatus includes an inverter which drives a permanent magnet motor. The inverter includes a three-phase bridge circuit including a plurality of switch elements, a drive circuit connected to the three-phase bridge circuit, a control circuit connected to the drive circuit, and an abnormality detecting unit which detects abnormality of the inverter. The drive circuit includes a three-phase-short-circuit-forming circuit which causes three phases of the permanent magnet motor to form short circuits, an abnormality accepting terminal which accepts an abnormality signal output from the abnormality detecting unit, and a check terminal which accepts an active check signal for causing the three-phase-short-circuit-forming circuit to perform three-phase short circuit control.
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公开(公告)号：US10065585B2
公开(公告)日：2018-09-04
申请号：US15316644
申请日：2015-07-07
Inventor： Naoya Iwasaki , Yoshihiko Maeda
IPC: B60R16/033 , F02N11/08 , H02J7/00 , B60R16/00
Abstract: A vehicle power supply system has a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a DC-DC converter, and a controller. In a case where power is supplied to both of a starter and an electrical component from any one of a first battery and a second battery, the controller causes power to be supplied to the electrical component via the DC-DC converter.
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