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    • 6. 发明授权
    • Motor control device and electric steering system
    • 电机控制装置和电动转向系统
    • US08670904B2
    • 2014-03-11
    • US12937485
    • 2009-05-28
    • Atsuhiko YonedaYasuo Shimizu
    • Atsuhiko YonedaYasuo Shimizu
    • G06F17/00G06F19/00B62D6/00G08B1/06
    • B62D5/0484B62D5/046B62D5/049H02P6/185H02P29/032
    • A motor control device includes: a rotation angle detection portion that detects a rotation angle of a motor and outputs a rotation angle signal; an abnormal condition detection portion that detects the presence or absence of an abnormal condition of the rotation angle detection portion; a rotation angle estimation portion that estimates the rotation angle of the motor and outputs an estimate rotation angle signal; and a driving control portion that controls driving of the motor on the basis of the rotation angle signal, which is output from the rotation angle detection portion, when the abnormal condition detection portion does not detect an abnormal condition of the rotation angle detection portion, and controls driving of the motor on the basis of the estimate rotation angle signal, which is output from the rotation angle estimation portion, when the abnormal condition detection portion detects an abnormal condition of the rotation angle detection portion.
    • 电动机控制装置包括:旋转角度检测部,其检测电动机的旋转角度并输出旋转角度信号; 异常状态检测部,其检测所述旋转角度检测部的异常状况的有无; 旋转角度估计部,其估计所述电动机的旋转角度并输出估计旋转角度信号; 以及驱动控制部,当所述异常状态检测部未检测到所述旋转角度检测部的异常状态时,基于从所述旋转角度检测部输出的旋转角度信号来控制所述电动机的驱动,以及 当异常状态检测部检测到旋转角度检测部的异常状况时,基于从旋转角度估计部输出的估计旋转角度信号来控制电动机的驱动。
    • 7. 发明授权
    • Worm wheel
    • 蜗轮
    • US08646352B2
    • 2014-02-11
    • US13505350
    • 2010-10-20
    • Yosuke TanakaYasuo ShimizuAtsuhiko Yoneda
    • Yosuke TanakaYasuo ShimizuAtsuhiko Yoneda
    • F16H55/12
    • F16H55/06B62D5/0409F16H55/22F16H2055/065
    • Provided is a worm wheel that allows the residual stress in the plastic gear forming member thereof to be reduced, and suited for compact design. The worm wheel comprises a metallic core member (30) and a plastic gear forming member (20) formed on an outer periphery of the core member. In particular, the core member includes a boss portion (31) defining a pivot portion, an intermediate portion (32) extending radially from the outer periphery of the boss portion, and a cylindrical portion (33) connected to a radially outer end of the intermediate portion and having the gear forming member molded thereon coaxially with the boss, the cylindrical portion being formed with through holes (34) or cutouts (36) passed radially therethrough.
    • 提供一种能够减小塑料齿轮形成构件中的残余应力的蜗轮,适用于紧凑的设计。 蜗轮包括金属芯构件(30)和形成在芯构件的外周上的塑料齿轮形成构件(20)。 特别地,芯部件包括限定枢转部分的凸起部分(31),从凸起部分的外周径向延伸的中间部分(32)和连接到凸起部分的径向外端的圆柱形部分(33) 中间部分并且具有与凸台同轴成型的齿轮形成构件,圆柱形部分形成有径向通过的通孔(34)或切口(36)。