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公开(公告)号：US20230006586A1
公开(公告)日：2023-01-05
申请号：US17780349
申请日：2020-11-13
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kentaro MATSUO , Kohei MYOEN , Kenichi YOSHIDA , Kazuyoshi AIZAWA
Abstract: A power conversion device includes: an inverter that converts a DC voltage into an AC voltage and drives a synchronous motor; and a magnetic pole position correction unit that corrects an error in a magnetic pole position of a rotor from a rotation angle sensor of the synchronous motor. The magnetic pole position correction unit includes an actual current phase calculation unit that calculates a current phase from a current when three-phase lines are short-circuited during rotation of the synchronous motor and an ideal current phase calculation unit that calculates an ideal current phase based on a rotational speed of the rotor and a temperature of a stator, and corrects the magnetic pole position from a difference between outputs of the actual current phase calculation unit and the ideal current phase calculation unit.
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公开(公告)号：US20230004184A1
公开(公告)日：2023-01-05
申请号：US17782135
申请日：2020-09-17
Applicant: HITACHI ASTEMO, LTD.
Inventor： Nozomi KASAHARA , Yutaka UEMATSU , Hideyuki SAKAMOTO , Hidetatsu YAMAMOTO
Abstract: An electronic control device is connected via a cable to each of a plurality of sensors which outputs a sensor output for each data acquisition cycle determined in advance in accordance with a clock signal. The electronic control device includes a power supply unit configured to supply power to the sensor via the cable, an acquisition unit configured to acquire a feature amount directly or indirectly indicating a magnitude of radiation noise from at least one sensor among the plurality of sensors, a phase difference decision unit configured to decide a phase difference of a data acquisition cycle for each of the plurality of sensors based on the feature amount, and a control unit configured to transmit the phase difference to each of the plurality of sensors.
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公开(公告)号：US20230003215A1
公开(公告)日：2023-01-05
申请号：US17777682
申请日：2020-10-30
Applicant: Hitachi Astemo, Ltd.
Inventor： Shingo TAMURA , Hiroyuki YAMADA , Kiyotaka OGURA , Minoru HASHIDA
Abstract: An object of the present invention is to secure a gap between a component on a suction valve side and a component on an anchor side when a valve is closed, regardless of an integration tolerance of a plurality of components, and to be able to reliably close the valve. In an electromagnetic valve mechanism 300 including an anchor assembly 36 and a magnetic core 33 between which a magnetic attraction force acts, and a suction valve 30 configured to be able to come into and out of contact with the anchor assembly 36, the anchor assembly 36 includes a first anchor assembly component 36a having a facing surface 36ab that faces the magnetic core 33, a second anchor assembly component 36b configured integrally with the first anchor assembly component 36a, and a press-fitting portion 36c that fixes the first anchor assembly component 36a and the second anchor assembly component 36b. A press-fitting length L1 of the press-fitting portion 36c is set to a length at which the second anchor assembly component 36b and the suction valve 30 are separated from each other in a state where the suction valve 30 is closed.
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公开(公告)号：US20230001912A1
公开(公告)日：2023-01-05
申请号：US17778605
申请日：2020-11-06
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiroshi NAKANO , Nobuyasu KANEKAWA , Atsushi ARATA
Abstract: A vehicle control system includes a first electric motor that causes a vehicle to travel, a second electric motor that generates power by using an output of a power source and starts the power source, a power storage device that stores the power generated by the second electric motor and supplies the power to the first electric motor, a monitoring device that monitors a failure state of the vehicle, and a switch that switches the vehicle to travel from the first electric motor to the second electric motor. In a case of a predetermined driving state in which the monitoring device detects a failure of the first electric motor and a driving force is obtained from the second electric motor, the monitoring device controls the switch to switch the driving force for causing the vehicle to travel from the first electric motor to the second electric motor.
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公开(公告)号：US20220416630A1
公开(公告)日：2022-12-29
申请号：US17777991
申请日：2020-11-04
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kenichi NAKAYAMA , Akira TOBA , Hiromitsu OKAMOTO , Teruaki HIGUCHI , Zhi JING , Satoshi YAMAMURA
Abstract: The reliability of a rotating electrical machine is improved. A method for manufacturing a stator used in a rotating electrical machine includes: a first step of arranging a first segment coil and a second segment coil to face each other; a second step of processing the first segment coil to generate a bridge part that comes into contact with the second segment coil; and a third step of joining the bridge part and the second segment coil by laser welding.
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Patent Agency Ranking
公开(公告)号：US20220397437A1
公开(公告)日：2022-12-15
申请号：US17776658
申请日：2020-10-27
Applicant: Hitachi Astemo, Ltd.
Inventor： Tomoaki SAITO , Akira UENODAN , Nobuaki GORAI
Abstract: Provided is a physical quantity detection device that can improve physical quantity measurement accuracy over a conventional device. A physical quantity detection device 20 includes a detector including a flow rate detection unit 205, a circuit board 207, a housing 201, and a cover 202. The detector detects a physical quantity and is mounted on the circuit board 207. The housing 201 houses the circuit board 207. The cover 202 is fixed to the housing 201 and defines an auxiliary passage 234 in which the flow rate detection unit 205 is disposed. The housing 201 and the cover 202 include a positioning portion P that includes a pin P1 extending in a thickness direction Dt of the circuit board 207 and a fitting portion P2 into which an end portion P11 of the pin P1 is fitted for positioning between the housing 201 and the cover 202. The pin P1 includes an engagement portion P12 that faces an engagement surface 207f of the circuit board 207 along the thickness direction Dt and restricts movement of the circuit board 207 in a surface direction Df along the front and rear surfaces thereof.
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公开(公告)号：US11522449B2
公开(公告)日：2022-12-06
申请号：US17397109
申请日：2021-08-09
Applicant: Hitachi Astemo, Ltd.
Inventor： Atsushi Ogawa , Motoaki Kato , Kengo Nomura
Abstract: There is provided a transformation control device of a transformation chopper circuit that transforms an input by turning on and off a current using a switch and outputs the transformed input. The transformation control device controls at least an ON/OFF state of a main switch by acquiring an output voltage of the transformation chopper circuit in a case where the main switch is in an ON state, the main switch being turned on in a case where energy is accumulated in an inductor.
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公开(公告)号：US20220386454A1
公开(公告)日：2022-12-01
申请号：US17719584
申请日：2022-04-13
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuo Maruyama
Abstract: The casing of an electronic control device includes a casing-side contact surface in contact with the end of a printed-circuit board. A cover includes a cover-side contact surface holding the end of the printed-circuit board together with the casing-side contact surface by being in contact with the end of the printed-circuit board. In the printed-circuit board, a held portion held between the casing-side contact surface and the cover-side contact surface is provided with a through-hole via.
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公开(公告)号：US20220385147A1
公开(公告)日：2022-12-01
申请号：US17887263
申请日：2022-08-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Tetsurou TATEYAMA , Kumiko YOSHINAGA , Eiji ICHIKAWA , Hirofumi WATANABE , Mototaka TAKAHASHI
Abstract: A wiring board (3) has first and second rigid sections (11, 12) each having six metal leaf layers, and a flexible section (13) having two metal leaf layers that connect the both rigid sections (11, 12). A capacitor unit (34) and a filter unit 31, which supplies power to an inverter, are mounted on the first rigid section (11), and a CPU (21) and a pre-driver circuit element (22) are mounted on the second rigid section (12). Mutually-independent two control systems are arranged so as to be symmetrical about a board center line (M). Detection signal lines (51) of rotation sensors (37, 38) located at the middle of the first rigid section (11) extend along the board center line (M) on the flexible section (13). Each of the two control systems is configured along a wiring direction of the detection signal lines (51).
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公开(公告)号：US20220381373A1
公开(公告)日：2022-12-01
申请号：US17884215
申请日：2022-08-09
Applicant: Hitachi Astemo, Ltd. , MURATA MACHINERY, LTD.
Inventor： Takahiro NAKAYAMA , Kenichi MORI , Kazuki OHTA , Motohiro TANIGAWA , Tadashi UOZUMI
Abstract: The tube body intermediate includes: a carbon fiber disposed with respect to an outer circumferential surface of a mandrel such that the carbon fiber extends in an axial direction of the mandrel in a manner of being wound by less than one turn; and a first fixing member wound with respect to an outer circumferential surface of the mandrel such that the first fixing member extends in the axial direction of the mandrel in a manner of being wound over the carbon fiber by one or more turns in a circumferential direction.
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