公开(公告)号：US10784800B2

公开(公告)日：2020-09-22

申请号：US16341685

申请日：2017-11-24

申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.

发明人： Tatsuya Hatakeyama

IPC分类号： H02H7/09 ,  H02P6/12 ,  H02P29/024 ,  H02P29/032 ,  B60L3/00 ,  H02P6/16 ,  H02P29/028

摘要： An object of the present invention is to improve reliability after the control of a microcomputer recovers. A signal control apparatus according to the present invention includes a microcomputer, an output control unit that receives a reset signal and a load control signal from the microcomputer and outputs a load output signal to a load, and when the output control unit receives the reset signal, the output control unit maintains a state of the load output signal immediately before the reset signal is received, and when the load control signal is switched, the output control unit releases the maintaining state of the load output signal.

公开(公告)号：US10254733B2

公开(公告)日：2019-04-09

申请号：US15320003

申请日：2015-05-11

申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.

发明人： Tatsuya Hatakeyama ,  Hiroaki Igarashi ,  Hideyuki Sakamoto

IPC分类号： G05B19/042 ,  G06F11/30 ,  B60L3/00 ,  B60L1/00 ,  H02P29/032

摘要： A motor control device avoids the difficulties associated with safely controlling a motor using a second calculation unit when a first calculation unit malfunctions. A motor control device monitors a malfunction of a first microcomputer and a malfunction of a first CPU of the first microcomputer and performs a determination based on a result of a second external communication functional unit. When the determination is normal, the process proceeds determine that the first CPU is normal and a second CPU malfunctions. Therefore, it is possible to continue processing using the first CPU in this case.

公开(公告)号：US09964579B2

公开(公告)日：2018-05-08

申请号：US15312085

申请日：2015-06-17

申请人： Hitachi Automotive Systems, Ltd.

发明人： Hiroaki Igarashi ,  Masayoshi Kashihara ,  Tatsuya Hatakeyama ,  Koichi Yahata ,  Hideyuki Sakamoto

IPC分类号： G01R31/02 ,  G01R31/40 ,  G01R15/04

CPC分类号： G01R31/02 ,  G01R15/04 ,  G01R19/0084 ,  G01R19/165 ,  G01R31/40

摘要： An object of the present invention is to diagnose a state of a voltage divider while performing a normal measurement to improve reliability. A voltage detection apparatus according to the present invention includes: a first resistor for dividing voltage of a detection unit into a first divided voltage value; and a test pattern insertion circuit unit including a second resistor for dividing the first divided voltage value into a second divided voltage value and a switching device, wherein the test pattern insertion circuit unit is connected to an equipotential connection point to the first divided voltage value, and wherein a state of the first resistor is detected based on the second divided voltage value when the switching device is conductive.