知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

4 records (took 0.017 seconds)

    Motor Control Device and Brake Control Device
    1.
    发明申请
    Motor Control Device and Brake Control Device 审中-公开

    公开(公告)号：US20200244203A1

    公开(公告)日：2020-07-30

    申请号：US16755259

    申请日：2018-10-10

    Applicant: Hitachi Automotive Systems, Ltd.

    Inventor： Takafumi HARA ,  Toshiyuki AJIMA ,  Shigehisa AOYAGI ,  Hiroyuki OTA ,  Kenichiro MATSUBARA

    IPC: H02P23/14 ,  H02P27/08 ,  H02P25/022 ,  F16D55/225 ,  F16D65/18

    Abstract: Disclosed are a motor control device that can accurately estimate a rotor position based on a neutral point potential even when a load increases, and a brake control device that is driven by the motor control device. The motor control device 3 includes a three-phase synchronous motor 4 including a three-phase winding, an inverter 31 connected to the three-phase winding, a control unit 6 for controlling the inverter based on a rotor position of the three-phase synchronous motor, and a rotational position estimation unit 2 for estimating a rotor position θd based on a neutral point potential Vn of the three-phase winding. The rotational position estimation unit estimates a rotor position selectively using one or more of a plurality of detected values of the neutral point potential according to a pre-estimated value of the rotor position and a voltage application state to the three-phase winding.

    POWER STEERING DEVICE AND CONTROL DEVICE FOR POWER STEERING DEVICE
    3.
    发明申请
    POWER STEERING DEVICE AND CONTROL DEVICE FOR POWER STEERING DEVICE 有权
    用于动力转向装置的动力转向装置和控制装置

    公开(公告)号：US20170025973A1

    公开(公告)日：2017-01-26

    申请号：US15125094

    申请日：2015-03-05

    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

    Inventor： Yoshitaka SUGIYAMA ,  Masaki KASHIMA ,  Hiroyuki OTA

    IPC: H02P6/15 ,  H02P6/08 ,  B62D5/04 ,  H02P27/08

    CPC classification number: H02P6/15 ,  B62D5/046 ,  H02P6/085 ,  H02P27/085

    Abstract: Provided are a power steering device and a control device for a power steering device, which are capable of reducing power consumption. The power steering device includes a current detection number setting circuit configured to set the number of times of detection of a DC bus current value by a current detecting circuit to a first predetermined number over a first predetermined cycle of a PWM period when the steering-state signal indicative of a steering operation state is received, and to set the number of times of detection so that the number of times of detection becomes smaller than the first predetermined number over the first predetermined cycle of the PWM period when a steering-state signal indicative of a non-steered state is received.

    Abstract translation: 提供了能够降低功耗的动力转向装置和用于动力转向装置的控制装置。 动力转向装置包括：电流检测数设定电路，其被配置为当所述转向状态下的PWM周期的第一预定周期中将由所述电流检测电路检测到的DC总线电流值的次数设定为第一预定数 接收到表示转向操作状态的信号，并且设定检测次数，使得当指示的指示状态信号时，在PWM周期的第一预定周期内，检测次数变得小于第一预定次数 的非转向状态。

    PRESSURE SENSOR
    4.
    发明申请
    PRESSURE SENSOR 有权
    压力传感器

    公开(公告)号：US20160025581A1

    公开(公告)日：2016-01-28

    申请号：US14647351

    申请日：2013-11-06

    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

    Inventor： Atsushi KAZAMA ,  Hiroyuki OTA ,  Jiro HASHIZUME ,  Junji ONOZUKA ,  Hiroshi ONUKI ,  Miho TOBITA

    IPC: G01L9/00

    CPC classification number: G01L9/0054 ,  G01L9/0042 ,  G01L9/0055 ,  G01L9/065

    Abstract: An object of the present invention is to realize a pressure sensor with a small variation in sensor characteristics. The pressure sensor includes a diaphragm having longitudinal and lateral sides, and four strain gauges disposed on the diaphragm. The four strain gauges are arranged at a center of the diaphragm. Two of the four strain gauges are arranged along a lateral direction, and other two strain gauges are arranged along a longitudinal direction.

    Abstract translation: 本发明的目的是实现传感器特性变化小的压力传感器。 压力传感器包括具有纵向和横向的隔膜和设置在隔膜上的四个应变计。 四个应变片布置在隔膜的中心。 四个应变片中的两个沿着横向布置，并且沿着纵向方向布置了其他两个应变计。

Patent Agency Ranking