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1. 发明授权

US10664033B2 Power supply circuit 有权
公开(公告)号：US10664033B2
公开(公告)日：2020-05-26
申请号：US16340342
申请日：2017-09-26
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Yuri Ohara , Atsushi Arata
IPC分类号： G06F1/26 , G06F1/28 , G06F1/30 , G05F1/00
摘要： In a power supply circuit in which a power supply sequence is variable, a malfunction of a device to which power is supplied caused by a wrong power-on order is prevented. In a power supply circuit according to the present invention, an operation state of a previous voltage regulator is detected, and based on a detection result, an order of activation or stop of respective voltage regulators is controlled.

2. 发明授权

US11050345B2 Power supply apparatus and electronic control unit 有权
公开(公告)号：US11050345B2
公开(公告)日：2021-06-29
申请号：US16619001
申请日：2018-04-24
申请人： Hitachi Automotive Systems, Ltd.
发明人： Ming Liu , Taizo Yamawaki , Atsushi Arata , Yasushi Sugiyama , Ryusuke Sahara
IPC分类号： H02M3/04 , H03K3/017
摘要： A power supply apparatus that can realize ripple reduction, and an electronic control unit including the power supply apparatus are provided. In view of this, a PWM controller generates a PWM signal, and a PFM controller generates a PFM signal having a phase independent of the PWM signal. A level-fixed period generating circuit sets a level-fixed period having a start timing at a selection timing set to an edge of the PFM signal. A mode selecting circuit selects, at the selection timing and as a switching control signal, the PWM signal instead of the PFM signal, and controls a logic level of the switching control signal in the level-fixed period starting at the selection timing, such that the logic level becomes a fixed logic level.

3. 发明授权

US11449091B2 Electronic control device 有权
公开(公告)号：US11449091B2
公开(公告)日：2022-09-20
申请号：US16608567
申请日：2018-04-06
申请人： Hitachi Automotive Systems, Ltd.
发明人： Teppei Hirotsu , Hiroshi Iwasawa , Atsushi Arata
IPC分类号： G09G5/00 , G06F1/12 , B60W50/06 , G06F1/04 , G06F1/3296
摘要： There is provided a technology capable of synchronizing a plurality of timers with a simple circuit configuration in an electronic control unit that controls a vehicle. An electronic control unit according to the present invention concatenates a second timer value as the most significant bit of a first timer value reset by a synchronization signal, and counts up the second timer value by the synchronization signal.

4. 发明授权

US11008988B2 Electronic control device and abnormality/normality determination method of electronic control device 有权
公开(公告)号：US11008988B2
公开(公告)日：2021-05-18
申请号：US16487382
申请日：2018-01-29
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Yasushi Sugiyama , Atsushi Arata , Yasuo Shima , Masahiro Doi
IPC分类号： F02M51/00 , F02D41/22 , F02M51/06
摘要： An electronic control device has a compact abnormality detection circuit that does not require a complicated circuit, and is capable of suppressing a cost increase when being applied a direct injection injector drive circuit and other drive circuits. A current detection circuit includes a current detection resistor, a differential amplifier, and a current detection unit. The current detected is supplied to the abnormality/normality determination unit. A combined resistance value of a diagnostic current drive circuit and the current detection resistor is higher than an injector drive circuit. A fuel injection signal is input to a logic circuit, and a fuel cut signal is input to a different terminal of the logic circuit. The logic circuit's output terminal is connected to the injector drive circuit's gate. The output signal from a fuel injection signal output unit is supplied via a switch to the diagnostic current drive circuit's gate.

5. 发明授权

US10886970B2 Load drive system and load drive method 有权
公开(公告)号：US10886970B2
公开(公告)日：2021-01-05
申请号：US16494157
申请日：2017-08-31
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Tomohiko Yano , Hiroki Yamashita , Taizo Yamawaki , Atsushi Arata , Mitsuhiko Watanabe , Ryusuke Sahara , Kenichi Hoshino
IPC分类号： H04B3/54 , B60R16/023 , H04B3/46 , H04L25/49
摘要： A load drive system for driving a load supplied with power from a power line includes a control unit which controls switching between the power line and the load and a communication unit which communicates using voltage and current of the power line. When performing the switching, the control unit controls, based on a width of a transition period of the power-line current, the transition period being attributable to the switching, timing of the switching so as to move the transition period away from a center of a period corresponding to a symbol communicated by the communication unit.

6. 发明授权

US10833688B2 Electronic control device 有权
公开(公告)号：US10833688B2
公开(公告)日：2020-11-10
申请号：US16610321
申请日：2018-04-11
申请人： Hitachi Automotive Systems, Ltd.
发明人： Masahiro Doi , Atsushi Arata
IPC分类号： H03M1/12 , H03M1/06 , G05F1/575
摘要： An inexpensive electronic control device is implemented that enables a power supply voltage supplied to a microcomputer to be varied using a simple method and that enables an identical power supply to be adapted to various microcomputers. A switch is turned on to determine the value of a discrete resistor, and a voltage based on the value of current from a current source and the resistance value of the discrete resistor is caused in an In1 terminal. By an A/D converter, the In1 terminal voltage is subjected to A/D conversion, and a digital code corresponding to the selectively connected discrete resistor is detected. The result of the A/D conversion is saved in a register, and the determination of the resistance value of the discrete resistor performed by the A/D converter is completed. After the completion of the resistance value determination performed by the A/D converter, power supply voltages start activation. The core voltage activates to secure a voltage corresponding to a reference voltage set by the register and thereby a desired power supply is completed.

7. 发明授权

US10787193B2 Drive control device and control method for electric motor 有权
公开(公告)号：US10787193B2
公开(公告)日：2020-09-29
申请号：US16306734
申请日：2017-06-09
申请人： Hitachi Automotive Systems, Ltd.
发明人： Hiroshi Hirayama , Yoshitaka Abe , Tomonobu Koseki , Mitsuhiko Watanabe , Atsushi Arata
IPC分类号： H01M10/48 , B62D5/04 , H02P6/14 , H02P25/16
摘要： Provided is a drive control device for an electric motor in which the number of terminals and the number of wires can be reduced. The drive control device includes: an inverter circuit that drives an electric motor having a plurality of phases; a drive circuit including drivers; a control circuit that outputs a control signal to control the drive circuit; and a signal line that connects the control circuit to the drive circuit to transmits a control signal from the control circuit to the drive circuit, in which the number of signal lines is fewer than the number of the phases of the electric motor.

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