Angle detection apparatus
AssigneeKyushu University, National University Corporation
InventorIchiro Sasada
Life of this patent
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Abstract
Provided is an angle detection device capable of detecting the angle with high sensitivity by a very simple assembly process without requiring complicated processing. The angle detection device is provided with: a rotor (5) which is formed by a disk plate body produced from a magnetic substance having uniaxial magnetic anisotropy, the disk plate body rotating around a center point within the disk plate surface; a stator (3) which is provided to face the plate surface of the disk plate body of the rotor (5), has approximately the same external shape as that of the rotor, and is divided into a plurality of fan-shaped regions, and in which an exciting coil or a detection coil is wound along the outer periphery of each of the divided regions.
Claims17
An angle detection apparatus comprises comprising:
- a rotor in which a disk member comprising a magnetic body has a magnetic permeability, which is uniaxially anisotropic along a plane of the disk member, said disk member being rotatable around a central point in a plane of the disk member;
- and
- a stator comprising a plurality of coils, at least one of said coils being an exciting coil that generates a magnetic field, and at least one of said coils of the rest being a detection coil that intersects with the magnetic field excited by said exciting coil to detect a voltage corresponding to an angle of rotation of said rotor;
- wherein said stator is disposed in a vicinity of the disk member of said rotor so as to face the plane thereof, said stator being divided into a plurality of sections and said exciting coil and said detection coil being provided on at least linear portions of the sections, respectively, on an outer periphery of said sections;
- said stator has substantially a same outer shape as the disk member of said rotor, said stator being divided into a plurality of fan-shaped sections and said exciting coil and said detection coil being provided alternately on at least linear portions of the fan-shaped sections, respectively, on an outer periphery of said fan-shaped sections.
Dependencies are inferred from the claim text.