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    • 78. 发明授权
    • Non-contact rotation angle detecting sensor
    • 非接触式旋转角度检测传感器
    • US07157907B2
    • 2007-01-02
    • US11261547
    • 2005-10-31
    • Shunichi Sato
    • Shunichi Sato
    • G01B7/30
    • G01D5/145
    • A stationary yoke surrounds an outer peripheral surface of a ring-shaped permanent magnet in a certain distance. The ring-shaped permanent magnet is fixed to a rotor and has two poles of N, S poles in a diameter direction. The stationary yoke includes a first outside yoke and a second outside yoke overlapped in an axial direction and a hole element is disposed in a gap of the first outside yoke. An axial height of the first outside yoke changes along the circumferential direction and a height of the second outside yoke has a complementary relation with the height of the first outside yoke, and the first outside yoke and the second outside yoke are overlapped in a certain clearance. A ratio of an amount of the magnetic flux passing through the gap to an amount of the magnetic flux not passing through the gap changes with rotation of the ring-shaped permanent magnet and further, the change of the height causes a change in the magnetic flux amount flowing in the first outside yoke, thereby improving linearity of an output of a hole element.
    • 固定磁轭围绕一定距离的环形永久磁铁的外周面。 环形永磁体固定在转子上,并具有直径方向上的N,S极的两极。 固定轭包括在轴向上重叠的第一外轭和第二外磁轭,并且孔元件设置在第一外磁轭的间隙中。 第一外轭的轴向高度沿周向变化,第二外轭的高度与第一外轭的高度成互补关系,第一外轭和第二外轭以一定间隙重叠 。 通过间隙的磁通量与未通过间隙的磁通量的比例随环形永磁体的旋转而变化,此外,高度的变化导致磁通量的变化 在第一外轭中流动的量,从而提高孔元件的输出的线性。