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公开(公告)号：US12257910B2
公开(公告)日：2025-03-25
申请号：US18262590
申请日：2021-09-30
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi Ikuyama , Koichi Yahata , Shinichirou Hida , Yawara Kato
Abstract: There are provided a plurality of drive circuits (103 U, 103 L) for driving respective plural switching devices constituting upper arms and lower arms, a power supply circuit for supplying a power supply to the plurality of drive circuits, and a discharge circuit for discharging a capacitor. The power supply circuit includes a first transformer (201U) for the upper arms, and a second transformer (201L) for the lower arms, which include a primary winding connected in parallel to a DC power supply. The first transformer and the second transformer include a secondary winding for supplying a power supply to the drive circuits and for supplying a power supply to a low-voltage circuit (110). Each of the first transformer and the second transformer includes a feedback winding for outputting the voltage output to the drive circuits, to a power supply control IC. The discharge circuit (120) is driven by a power supply supplied from the feedback winding.
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公开(公告)号：US20250096079A1
公开(公告)日：2025-03-20
申请号：US18729353
申请日：2022-12-27
Applicant: Hitachi Astemo, Ltd.
Inventor： Masahiro SEO , Takeshi TOKUYAMA , Takashi ISHII
IPC: H01L23/495 , H01L25/07 , H02M7/00
Abstract: In this semiconductor device and the inverter provided with the semiconductor device, an upper arm semiconductor element on a positive electrode wiring plate and an AC wiring plate are connected to each other by a first wiring member, and a lower arm semiconductor element on the AC wiring plate and a negative electrode wiring plate are connected to each other by a second wiring member. The AC wiring plate has: a first region to which the first wiring member is to be connected; a second region in which the lower arm semiconductor element is to be provided; and a connection region that connects these two regions. The connection region is positioned opposite positive-electrode/negative-electrode terminals with a region in between where the first and second wiring members are used, and the placement order is as follows: the positive electrode wiring plate, the negative electrode wiring plate, the first region, and the second region.
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公开(公告)号：US20250091643A1
公开(公告)日：2025-03-20
申请号：US18368193
申请日：2023-09-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Xiaoliang ZHU , Subrata Kumar KUNDU , Paul LIU
Abstract: In some examples, a service computing device receives, from a vehicle computing device onboard a vehicle, a communication including sensor data obtained from at least one sensor onboard the vehicle. Based on the communication, the service computing device determines a transmission delay corresponding to a difference between a time when the vehicle sent the communication and a time when the communication was received. Based on the communication, the service computing device determines a trajectory of the vehicle on a travel route. Based on the sensor data, transmission delay, wind direction and magnitude, surrounding objects, and trajectory, the service computing device determines vehicle control information for the vehicle. The service computing device sends, to the vehicle, based at least on the vehicle control information, at least one instruction causing the vehicle to perform at least one control operation for traversing one or more locations associated with the trajectory of the vehicle.
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公开(公告)号：US12254700B2
公开(公告)日：2025-03-18
申请号：US17519317
申请日：2021-11-04
Applicant: Hitachi Astemo, Ltd.
Inventor： Xiaoliang Zhu , Subrata Kumar Kundu , Paul Liu
Abstract: A system comprising at least one hardware processor for updating a cloud-based road anomaly database is disclosed, wherein the system receives information from a vehicle regarding an object detected by one or more sensors of the vehicle, the information may include a location and/or a size of the detected object; compares the location and/or the size of the first detected object against data stored in a road feature database regarding the first detected object; determines, based on comparing the location and/or the size, an accuracy score associated with the first detected object and the second detected object; and updates the cloud-based road anomaly database with the received information for the second detected object based on the associated accuracy score being higher than at least one of a threshold accuracy score or an accuracy score associated with corresponding object information stored in the cloud-based road anomaly database.
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公开(公告)号：US12252210B2
公开(公告)日：2025-03-18
申请号：US17406668
申请日：2021-08-19
Applicant: Hitachi Astemo, Ltd.
Inventor： Tsubasa Kimura
Abstract: A shock absorber includes a tubular outer tube, a tubular inner tube, a rod, a piston, an urging member, and a guide bush. The guide bush is a ring-shaped member arranged along an inner periphery of the outer tube, abuts against a front surface and a rear surface of the inner tube to movably hold the inner tube, and is separated from left and right side surfaces of the inner tube.
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Patent Agency Ranking
公开(公告)号：US12249943B2
公开(公告)日：2025-03-11
申请号：US17540595
申请日：2021-12-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuta Nakamura , Masatoshi Goto , Yoshinori Sagiya , Kazunari Kurokawa , Shugo Ueno , Shintaro Tai
IPC: H02P27/06 , H02M1/32 , H02P29/024 , H02P29/028 , H02P29/68
Abstract: A control device that does not require arithmetic processing of a phase current can be provided. A control device in which a plurality of switching legs including a pair of semiconductor switching elements constituting an upper arm and a lower arm are provided in a number corresponding to the number of phases of a motor that is a load includes a switch short circuit detection unit configured to detect a short circuit failure of the semiconductor switching element, and a control unit configured to execute determination processing of determining whether the short circuit failure has occurred in the upper arm or the lower arm on the basis of a result of detection by the switch short circuit detection unit, and to set all the semiconductor switching elements that constitute an arm in which a short circuit failure has occurred on the basis of a result of the determination processing.
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公开(公告)号：US20250079971A1
公开(公告)日：2025-03-06
申请号：US18726611
申请日：2022-02-07
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi IKUYAMA , Koichi YAHATA
IPC: H02M1/084 , H02M1/088 , H02M1/32 , H02M7/5387 , H02M7/5395
Abstract: In a gate drive circuit, a first and second gate drives IC includes an INA terminal and an INB terminal to which a PWM signal is input, a gate output terminal that outputs a gate drive signal, and an OSFB terminal that outputs a feedback signal of the gate drive signal, and they are configured to output a gate drive signal in an ON state when the input of the INA terminal and the INB terminal is (ON, OFF). In the first gate drive IC, a first PWM signal is input to the INA terminal, and a second PWM signal is input to the INB terminal, and in the second gate drive IC, the second PWM signal is input to the INA terminal, and the first PWM signal is input to the INB terminal. The first diode includes a cathode side connected to the INB terminal of the second gate drive IC and an anode side connected to the OSFB terminal of the first gate drive IC. The second diode includes a cathode side connected to the INB terminal of the first gate drive IC and an anode side connected to the OSFB terminal of the second gate drive IC.
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公开(公告)号：US12245384B2
公开(公告)日：2025-03-04
申请号：US17622174
申请日：2020-05-13
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yuki Nakamura , Masahiro Toyama , Isao Hoda , Hiroki Funato , Umberto Paoletti , Hideyuki Sakamoto , Yutaka Uematsu
Abstract: A signal transmission circuit includes: a circuit board stored in a housing; a connector which is mounted on the circuit board and includes a first signal terminal and a first ground terminal; and an integrated circuit which is mounted on the circuit board and includes a second signal terminal and a second ground terminal. The first signal terminal and the second signal terminal are connected to each other by a signal wiring arranged on the circuit board. The first around terminal and the second ground terminal are connected to each other by a ground wiring arranged in a predetermined range including a portion immediately above or immediately below the signal wiring in the circuit board. At least a part of the ground wiring immediately above or immediately below the signal wiring has a high impedance structure formed to be wider than the signal wiring and narrower than a combined width of the first signal terminal and the first ground terminal.
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公开(公告)号：US20250070642A1
公开(公告)日：2025-02-27
申请号：US18719158
申请日：2021-12-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Yoshiaki MIZUHASHI , Masahiro DOI , Mitsuhiro IWASAKI
Abstract: In a drive circuit of a voltage-driven power semiconductor switching element, a drive circuit capable of performing efficient switching control according to a drive condition with a relatively simple configuration is provided. The drive circuit includes the voltage-driven switching element, an on-circuit that injects a charge into a gate of the voltage-driven switching element in response to a drive signal, and an off-circuit that extracts the charge from the gate of the voltage-driven switching element in response to a drive signal. In the drive circuit, the injection of the charge into the gate of the voltage-driven switching element or the extraction of the charge from the gate by pulse driving of the on-circuit or the off-circuit, and switching time of the voltage-driven switching element is controlled.
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10.发明申请公开(公告)号：US20250065946A1
公开(公告)日：2025-02-27
申请号：US18724844
申请日：2023-02-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiroko UEDA , Kazuya TERASHIMA
Abstract: A steering operation control apparatus and steering operation control method capable of suppressing an unintended rotation of a steering wheel with a simple configuration. The steering operation control apparatus includes a steering control portion configured to control a steering actuator configured to operate a steering mechanism configured to drive a steering target wheel, and a reaction force control portion coupled with a steering wheel and configured to control a reaction force actuator configured to provide a reaction force. The reaction force control portion has a function of outputting a stop position maintaining signal required for the reaction force actuator to maintain a present position of the steering wheel to the reaction force actuator when a driver is detected to get out of or get into a vehicle. This aspect just feeds the stop position maintaining signal for maintaining the present position of the steering wheel to the reaction force actuator.
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