Rotation sensor

Details Rotation sensor Rotation sensor

2007-02-27

2007-02-27

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207160

Reexamination Certificate

active

11058206

ABSTRACT:
In a rotation sensor including a rotor10mounted to a rotating shaft S and having a conductive sensing unit12whereof the width varies in the circumferential direction; and stationary cores31, 32, 41, 42each including an exciting coil for forming a magnetic circuit with respect to the sensing unit of the rotor by allowing AC exciting current to flow therein, and a core body formed of magnetic material and retaining the exciting coil, and being mounted to the fixed member and disposed so as to oppose to the sensing unit of the rotor at a distance in the axial direction of the shaft, the stationary cores are disposed at two positions each having a central angle with respect to the axis of the shaft other than substantially 180°, so that the rotation sensor which is superior in mountability, is low in cost, and is superior in detection accuracy over a wider range is provided.

REFERENCES:
patent: 2621514 (1952-12-01), Waugh
patent: 5680040 (1997-10-01), Kawai et al.
patent: 6348790 (2002-02-01), Aler et al.
patent: 6472863 (2002-10-01), Garcia
patent: 6675124 (2004-01-01), Koga
patent: 2004/0085063 (2004-05-01), Jin et al.
patent: 2005/0030013 (2005-02-01), Terada et al.
patent: 2006/0103377 (2006-05-01), Hara et al.
patent: 2003-202240 (2003-07-01), None

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