-
491.发明授权公开(公告)号：US11967915B2
公开(公告)日：2024-04-23
申请号：US17778544
申请日：2020-11-04
Applicant: Hitachi Astemo, Ltd.
Inventor： Takaya Tsukagoshi , Takafumi Hara , Katsuhiro Hoshino , Toshiyuki Ajima
Abstract: The vibration and noise generated in a permanent magnet synchronous motor are effectively suppressed. A motor control device 1 comprises: a triangular wave generation unit 17 which generates a triangular wave signal Tr that is a carrier wave, a carrier frequency adjustment unit 16 which adjusts a carrier frequency fc that represents a frequency of the triangular wave signal Tr, and a gate signal generation unit 18 which performs pulse-width modulation on three-phase voltage commands Vu*, Vv*, Vw* according to a torque command T* using the triangular wave signal Tr, thereby generating a gate signal for controlling an operation of an inverter. The carrier frequency adjustment unit 16 adjusts the carrier frequency fc so as to change a voltage phase error Δθv representing a phase difference of the three-phase voltage commands Vu*, Vv*, Vw* and the triangular wave signal Tr based on the torque command T*, and a rotation speed ωr of a motor.
-
公开(公告)号：US11962238B2
公开(公告)日：2024-04-16
申请号：US17636633
申请日：2020-08-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Shigenobu Komatsu , Hideyuki Sakamoto
CPC classification number: H02M3/157 , B60L50/60 , H02M1/0003 , H02M1/0016 , H02M1/0025 , H02M1/0038 , H02M1/007 , H02M1/08 , H02M1/32 , B60L2240/527
Abstract: Provided is a highly reliable electronic control unit capable of improving responsiveness of an output current of a switching power supply to load current variation and suppressing power supply voltage variation accompanying the load current variation at low cost and with high power efficiency. Provided are: a calculation unit that performs signal processing; a first power supply circuit that supplies a first power supply voltage to the calculation unit; and a second power supply circuit that supplies a second power supply voltage to the first power supply circuit. The calculation unit has a function of outputting a control signal when a change in a consumed current of the calculation unit exceeds a predetermined threshold, and changes any one or both of a control scheme of the first power supply circuit and the second power supply voltage according to the control signal.
-
493.发明授权公开(公告)号：US11961780B2
公开(公告)日：2024-04-16
申请号：US17295713
申请日：2019-11-08
Applicant: HITACHI ASTEMO, LTD.
Inventor： Nobutake Tsuyuno , Akira Matsushita , Yujiro Kaneko
IPC: H05K7/20 , H01L21/48 , H01L23/367 , H01L23/373
CPC classification number: H01L23/3677 , H01L21/4882 , H01L23/3735 , H05K7/209
Abstract: A semiconductor module includes a semiconductor device that includes first and second fin bases having first and second connecting portions and a resin for sealing the outer peripheral side surfaces of first to fourth conductors, and a flow path forming body connected to the first and second connecting portions of the first and second fin bases. A first elastically deformed portion, which is elastically deformed, is provided such that a distance in a thickness direction between the outer peripheral ends of the first and second connecting portions becomes smaller than a distance in a thickness direction between intermediate portions of the first and second connecting portions. The resin is filled between the first and second connecting portions of the first and second fin bases are filled with the resin therebetween.
-
公开(公告)号：US11956933B2
公开(公告)日：2024-04-09
申请号：US17760729
申请日：2020-07-31
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takashi Hirao , Takeshi Tokuyama , Noriyuki Maekawa , Akira Matsushita , Toshiya Satoh
CPC classification number: H05K7/2089 , H02K9/00 , H02M7/003 , H02M7/537
Abstract: No consideration is given to heat transferred from a semiconductor module to a capacitor via a bus bar module. The heat generated by a semiconductor module (1) is transferred to a bus bar module (3) via a DC terminal (1A) of the semiconductor module (1). As illustrated in FIG. 4(B), the heat transferred to the bus bar module 3 is then transferred to the pressing member 5 via the annular conductor 8 and the bolt 5A. Since the pressing member 5 is in close contact with the second cooler 2B, the heat transferred to the pressing member 5 is cooled by the second cooler 2B. On the other hand, the heat transferred to the convex portion 6A of the housing 6 is transferred to the first cooler 2A via the housing 6 and cooled. As a result, in the configuration in which a capacitor (4) is connected to the semiconductor module (1) via the bus bar module (3), the heat transferred from the semiconductor module (1) to the capacitor (4) can be suppressed.
-
公开(公告)号：US11956900B2
公开(公告)日：2024-04-09
申请号：US17435961
申请日：2019-12-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Tomohiro Fukuda , Yoshiaki Mizuhashi
CPC classification number: H05K1/144 , H05K1/115 , H05K1/184 , H05K3/306 , H05K3/36 , H05K2201/042 , H05K2201/1003 , H05K2201/10053 , H05K2201/10151
Abstract: An object of the present invention is to improve the component mounting efficiency. An electronic control unit of the present invention includes: a power board 23 that includes a first insertion hole portion R1A having a plurality of holes 23Aa-2U, 23Aa-2V, and 23Aa-2W through which a coil wire of a first system is inserted and a second insertion hole portion R2A having a plurality of holes 23Aa-2U, 23Aa-2V, and 23Aa-2W through which a coil wire of a second system is inserted; a control board 25 provided on an upper part of the power board 23; and a board-to-board connector 105 that electrically connects the power board 23 and the control board 25. The first insertion hole portion R1A and the second insertion hole portion R2A are collectively arranged on the same side of the power board 23.
-
Patent Agency Ranking
公开(公告)号：US11956700B2
公开(公告)日：2024-04-09
申请号：US17596940
申请日：2020-07-29
Applicant: Hitachi Astemo, Ltd.
Inventor： Satoshi Tamaki
IPC: H04W4/46 , H04W4/70 , H04W72/0446 , H04W72/0453 , H04W72/53
CPC classification number: H04W4/46 , H04W4/70 , H04W72/0446 , H04W72/0453 , H04W72/53
Abstract: The present invention provides a wireless communication system capable of performing communication between wireless communication apparatuses respectively mounted on vehicles performing platooning is characterized in that a frequency channel used in data transmission and reception between an own vehicle and a preceding vehicle adjacent to the own vehicle, and a frequency channel used in data transmission and reception between the own vehicle and a succeeding vehicle adjacent to the own vehicle are different from each other.
-
公开(公告)号：US11949303B2
公开(公告)日：2024-04-02
申请号：US17613544
申请日：2020-05-29
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kenichi Nakayama , Hiromitsu Okamoto , Satoshi Yamamura , Tomohiro Adachi
CPC classification number: H02K3/24 , H02K1/165 , H02K3/345 , H02K9/19 , H02K2203/03
Abstract: An object of the present invention is to efficiently cool a rotor coil even in a rotor provided with a wire connection plate. A stator of a rotating electric machine includes a stator core, a plurality of segment coils protruding from slots of the stator core and arranged in a radial direction, a connection conductor that connects the segment coils, and an insulating member that holds the connection conductor. The insulating member includes a through hole through which the segment coil penetrates and is accommodated. An opening through which a coolant can flow into the through hole is provided on an inner peripheral side of the insulating member.
-
公开(公告)号：US11945519B2
公开(公告)日：2024-04-02
申请号：US17244213
申请日：2021-04-29
Applicant: HITACHI ASTEMO, LTD.
Inventor： Akihiro Kogure
CPC classification number: B62D5/006 , B62D5/0448 , B62D6/008 , B62D15/0215
Abstract: A reaction force generating device for a steering device includes a steering shaft connected to a steering member on which a steering operation is to be performed by a driver, a direct drive motor connected to the steering shaft and configured to generate reaction torque, an electromagnetic brake configured to generate friction torque and including a first friction portion configured to integrally rotate with the steering shaft, a second friction portion provided to face the first friction portion and to be non-rotatable, and an electromagnetic unit configured to press the second friction portion against the first friction portion.
-
公开(公告)号：US11942889B2
公开(公告)日：2024-03-26
申请号：US17417311
申请日：2019-12-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Shinyu Ko , Kohei Myoen , Eigo Kishimoto
CPC classification number: H02P6/08 , B60L15/20 , B60L53/20 , B60L58/12 , B60L58/18 , B60L2240/421 , B60L2240/423
Abstract: A first torque calculation unit 114 calculates torque TQ_DC currently generated by a motor 106 based on a DC current DC1. A second torque calculation unit 115 calculates torque TQ_UVW currently generated by the motor 106 based on U-phase, V-phase, and W-phase currents. A torque limit calculation unit 116 calculates a torque limit TQ_LMT1 using a torque limit characteristic map measured in advance based on a current limit DC_LMT1. A torque limit correction unit 117 compares first torque TQ_DC with second torque TQ_UVW to calculate a torque variation degree KP1. Then, the torque limit TQ_LMT1 is corrected using the variation degree KP1 to calculate a torque limit TQ_LMT2. As a result, even if required torque reaches the torque limit, the DC current does not exceed the current limit, and the output of the motor can be fully utilized by approaching the current limit.
-
公开(公告)号：US11941983B2
公开(公告)日：2024-03-26
申请号：US17784485
申请日：2020-11-20
Applicant: Hitachi Astemo, Ltd.
Inventor： Hideyuki Kume , Hidehiro Toyoda
CPC classification number: G08G1/16 , B60W40/105 , B60W50/16 , G08G1/166 , G08G1/167 , B60W30/12 , B60W2050/143 , B60W2050/146 , B60W2420/42 , B60W2540/215 , B60W2552/53 , B60W2556/10 , B60W2556/40 , G06V20/588
Abstract: A driving assistance device includes a recording unit that records vehicle past traveling positions and related position estimation information, and a relative position estimation unit that estimates a vehicle relative position based on a sensor, adds a history of the relative position to the past traveling position, and uses the output of the sensor. The driving assistance device further includes a position estimation unit that estimates a vehicle position with respect to the past traveling positions and adds a history of the estimated position to the past traveling position, in addition to a deviation determination unit that determines deviation from the past traveling positions using a distribution of the past traveling positions, the vehicle position relative to the past traveling positions, and a reference value. The driving assistance device includes a control unit that controls the vehicle to cancel a warning or deviation when the deviation is determined.
-
-
-
-
-
-
-
-
-
Search Results
1790
records
(took 0.021 seconds)
