-
公开(公告)号：US20250105724A1
公开(公告)日：2025-03-27
申请号：US18730599
申请日：2022-12-27
Applicant: HITACHI ASTEMO, LTD.
Inventor： Ryoichi INADA , Hiroshi NAKANO , Nobuyasu KANEKAWA , Satoru SHIGETA
Abstract: This power conversion device comprises: a power conversion circuit in which at least three-phases of upper/lower arm circuits having switching elements connected in series are connected in parallel and which outputs AC current to a motor via an output line, said AC current being generated by the switching elements of each phase; a breaker that is provided on the output line of each phase and allows the AC current to flow or interrupts the AC current; a first failure location determination unit that determines a failure location of the switching elements; a breaker control unit that sets, as a failure phase, a phase corresponding to the switching element determined as the failure location by the first failure location determination unit and controls the breaker of the failure phase so that the AC current of the failure phase is allowed to flow at a predetermined specific electric angle in one electric angle cycle and the AC current of the failure phase is interrupted at another electric angle except the specific electric angle; and a failure-time current control unit that controls the drive of other switching elements different from the switching element determined as the failure location.
-
公开(公告)号：US20250100339A1
公开(公告)日：2025-03-27
申请号：US18730535
申请日：2023-01-05
Applicant: Hitachi Astemo, Ltd.
Inventor： Kosuke TOKUNAGA , Hirohito ISHII , Yutaka KURODA
IPC: B60G13/00
Abstract: Provided are a shock absorber and a bracket which are improved in attachment rigidity. A cylindrical portion is shaped by press-forming first and second holes in sheet material (flat plate) and then curving the sheet material into a tube, in which a bridge portion is formed between the first and second holes. The bracket is thus improved to have higher formability as compared to conventional brackets which are not provided with a bridge portion. This improves the accuracy (cylindricity, in particular) of the cylindrical portion. It is then possible to improve the shock absorber in attachment rigidity against a lateral force to the anteroposterior direction of a vehicle in a situation where the bracket is used to attach the shock absorber to the knuckle.
-
公开(公告)号：US12261554B2
公开(公告)日：2025-03-25
申请号：US17924655
申请日：2021-01-29
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yasuaki Sato , Keisuke Suzuki , Katsuhiro Hoshino , Hideki Sekiguchi
Abstract: Provided is a motor controller that can estimate the magnetic flux of a magnet without changing a current of an electric motor. A motor controller 1 includes a current detecting unit 15 that detects a current of an electric motor 5, a current stability determining unit 10 that determines whether or not a current detected by the current detecting unit 15 is stable, and a magnetic flux calculating unit (filters 8a to 8e, a current conversion unit 4b, a resistance calculating unit 9, a magnet magnetic flux estimating unit 11) that based on a determination made by the current stability determining unit 10 as to current stability, calculates the magnetic flux of a magnet of the electric motor 5, according to a voltage equation in a rotating coordinate system, to output the calculated magnet flux. The motor controller 1 further includes a control voltage output unit (a map 2, voltage instruction units 3a and 3b, a first three-phase conversion unit 4a) that outputs a control voltage to the electric motor 5, based on the magnetic flux of the magnet calculated by the magnetic flux calculating unit and on a torque instruction value.
-
公开(公告)号：US12252111B2
公开(公告)日：2025-03-18
申请号：US17641562
申请日：2020-11-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Daisuke Noma , Kentaro Ueno
Abstract: The vehicle control device of the present invention acquires characteristics of a road condition in front of a traveling vehicle based on external information; acquires vehicle behavior control variables for controlling the behavior of the vehicle based on estimated state variables of the vehicle that are obtained based on the characteristics, and control variables concerning speed of the vehicle based on the external information; acquires trajectory tracking control variables for causing the vehicle to track the target trajectory based on the target trajectory on which the vehicle travels that are obtained based on the characteristics and the estimated state variables; and outputs the control commands for controlling the suspension device, steering device, and braking and driving device based on the vehicle behavior control variables and the trajectory tracking control variables. This improves travel stability of the vehicle on a road surface on which an irregularity such as ruts exists.
-
公开(公告)号：US20250076448A1
公开(公告)日：2025-03-06
申请号：US18559880
申请日：2022-02-28
Applicant: HITACHI ASTEMO, LTD.
Inventor： Masato IMAI , Satoru OKUBO
Abstract: Provided are an own-vehicle position estimation device and an own-vehicle position estimation method which are capable of estimating the position of an own vehicle with high accuracy, including not only one-dimensional distances of movement but also two-dimensional directions of cornering. There are provided a vehicle position estimation unit 2 for calculating the position of a vehicle based on an output from a sensor for detecting a behavior of the vehicle, a wireless position estimation unit 1 for communicating with a wireless device 101 installed at an arbitrary position and for calculating the relative positions of the vehicle and the wireless device 101, and a position estimation parameter correction unit 3 for correcting parameters used for calculating at least the position of the vehicle and information about the cornering angle of the vehicle by the vehicle position estimation unit 2. The position estimation parameter correction unit 3 compares an amount of movement of the vehicle calculated by the wireless position estimation unit 1 with an amount of movement of the vehicle calculated by the vehicle position estimation unit 2, and corrects the parameters.
-
Patent Agency Ranking
公开(公告)号：US20250076077A1
公开(公告)日：2025-03-06
申请号：US18278871
申请日：2021-09-07
Applicant: Hitachi Astemo, Ltd.
Inventor： Masahiro KIYOHARA , Hiroki OTA , Takeshi OGATA
IPC: G01C21/00
Abstract: A problem to be solved by the present invention is that a host vehicle position calculated on the basis of a GNSS is affected by shielding, reflection, diffraction, and the like of a positioning radio wave due to a structure, depending on a structure environment present around a receiver and an arrangement of positioning satellites at the date and time, and a detected measured position is output in a biased manner. A map processing device 10 of the present invention processes map information used for positioning a host vehicle, and includes: a satellite orbit information acquisition unit 103 that acquires position information of a plurality of positioning satellites; a pseudo distance acquisition unit 102 that calculates a pseudo distance from the plurality of positioning satellites based on positioning radio waves respectively received from the plurality of positioning satellites; a positioning available satellite verification unit 104 that identifies, among the plurality of positioning satellites, a positioning satellite for which a distance to the host vehicle position and the pseudo distance do not match as a positioning unavailable satellite; and a map generation unit 106 that generates a map in which a direction from the host vehicle position to the positioning unavailable satellite is stored in association with the host vehicle position as a shielded range in which a positioning radio wave from the positioning unavailable satellite is shielded.
-
公开(公告)号：US12233963B2
公开(公告)日：2025-02-25
申请号：US17636172
申请日：2020-06-05
Applicant: HITACHI ASTEMO, LTD.
Inventor： Masatoshi Enomoto
Abstract: Provided is a steering device including a lock nut that fixes an outer race of a turning nut threadably engaged with a rack bar. A loosening prevention protruding portion formed on a lock nut main body is brought into contact with a radial-direction abutting portion to prevent loosening of the lock nut with a frictional force. At the same time, a lock nut recessed portion for reducing mechanical stiffness is formed in an outer peripheral surface of the loosening prevention protruding portion so that an external force acting from the outer race is buffered by the lock nut recessed portion. In this manner, a decrease in contact area between the loosening prevention protruding portion and the radial-direction abutting portion is reduced.
-
公开(公告)号：US12231009B2
公开(公告)日：2025-02-18
申请号：US17798777
申请日：2021-01-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Yukiko Kawano , Hiroshi Horie , Hiroshi Hamano , Hideaki Noto , Shunsuke Isogai , Chihiro Oinuma , Hirona Tanaka
Abstract: To prevent varnish from adhering to an adhesion prohibited area while satisfying required performance for varnish. A method for manufacturing a stator of a rotating electric machine in which a coil is wound around a stator core, the method includes: a first varnish process of forming a first varnish portion by dropping varnish at a coil disposed on an outermost circumference or an innermost circumference of a coil end portion where the coil protrudes from the stator core and positioned close to the stator core; and a second varnish process of forming a second varnish portion to provide a non-existence region where varnish is not applied between the first varnish portion and the second varnish portion by dropping varnish at a position farther from the stator core than a position in the first varnish process.
-
公开(公告)号：US20250052908A1
公开(公告)日：2025-02-13
申请号：US18721183
申请日：2021-12-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Toru KATO
Abstract: An in-vehicle electronic control unit includes: a positioning calculation unit that acquires GNSS information and acquires positioning information of an own vehicle; a vehicle movement detection unit that detects movement of the own vehicle; and an own vehicle movement determination unit that estimates movement while a vehicle system is stopped, in which the own vehicle movement determination unit determines whether the own vehicle has moved while the vehicle system is stopped, and based on a determination result as to whether the own vehicle has moved, determines whether the positioning calculation unit estimates a current position of the own vehicle by using a position of the own vehicle when the vehicle system is stopped.
-
公开(公告)号：US12225671B2
公开(公告)日：2025-02-11
申请号：US17642872
申请日：2020-08-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Tomohiro Fukuda
Abstract: An electronic control unit includes a connector, a first board, and a second board. The first board includes an inner-layer conductor. The second board includes an inner-layer conductor and provided with a control circuit. A thickness of the inner-layer conductor of the first board is thicker than a thickness of the inner-layer conductor of the second board. The thickness of the inner-layer conductor of the first board is 1.7 to 2.3 times the thickness of the inner-layer conductor of the second board.
-
-
-
-
-
-
-
-
-
Search Results
1697
records
(took 0.03 seconds)
