Back to results
US 6,498,409 B1Granted
Tachometer apparatus and method for motor velocity measurement
AssigneeDelphi Technologies, Inc.
InventorsSteven James Collier-Hallman, William J. Bressette
Life of this patent
Estimating the term…
Abstract
A method and apparatus for determining the velocity of a rotating device is described herein. The apparatus includes sets of sense magnets affixed to a rotating shaft of a rotating device and a circuit assembly. The circuit assembly includes a circuit interconnection having sense coils and sensors affixed thereto. The circuit assembly is adapted to place components thereon in close proximity to the sets of sense magnets on the rotating part.
Claims66
An apparatus for determining the velocity of a rotating device comprising:
- a rotational part having a set of sense magnets affixed to a rotating shaft of said rotating device configured to rotate about a rotation axis;
- and
- a circuit assembly including, a circuit interconnection having a plurality of sense coils, one or more sensors affixed to said circuit assembly, said circuit assembly adapted to be in proximity to said sets of sense magnets;
- wherein said set of sense magnets combine with said circuit assembly to form an air core electric machine such that voltages generated from each sense coil of said plurality of sense coils exhibit an amplitude proportional to said velocity;
- wherein said set of sense magnets is arranged in an annular ring, concentric with said rotation axis of said rotational part;
- wherein said set of sense magnets includes low-resolution poles;
- and
- wherein said set of sense magnets includes high-resolution poles having seventy-two sense magnets.
5 more elements
An apparatus for determining the velocity of a rotating device comprising:
- a rotational part having a set of sense magnets affixed to a rotating shaft of said rotating device configured to rotate about a rotation axis;
- and
- a circuit assembly including, a circuit interconnection having a plurality of sense coils, one or more sensors affixed to said circuit assembly, said circuit assembly adapted to be in proximity to said sets of sense magnets;
- wherein said set of sense magnets combine with said circuit assembly to form an air core electric machine such that voltages generated from each sense coil of said plurality of sense coils exhibit an amplitude proportional to said velocity;
- and
- wherein said circuit interconnection includes circuit elements including said plurality of sense coils formed therein.
3 more elements
An apparatus for determining the velocity of a rotating device comprising:
- a rotational part having a set of sense magnets affixed to a rotate shaft of said rotating device confined to rotate about a rotation axis;
- and
- a circuit assembly including, a circuit interconnection having a plurality of sense coils, one or more sensors and to said circuit assembly, said circuit assembly adapted to be in proximity to said sets of sense magnets;
- wherein said set of sense magnets combine with said circuit assembly to form an air core electric machine such that voltages generated from each sense coil of said plurality of sense coils exhibit an amplitude proportional to said velocity;
- and
- wherein said plurality of sense coils are characterized by a conductive windings arranged in a spiraling serpentine fashion on one or more layers of said circuit assembly and said circuit interconnection.
3 more elements
An apparatus for determining the velocity of a rotating device comprising:
- a rotational part having a set of sense magnets affixed to a rotating shaft of said rotating device configured to rotate about a rotation axis;
- and
- a circuit assembly including, a circuit interconnection having a plurality of sense coils, one or more sensors affixed to said circuit assembly, said circuit assembly adapted to be in proximity to said sets of sense magnets;
- wherein said set of sense magnets combine with said circuit assembly to form an air core electric machine such that voltages generated from each sense coil of said plurality of sense coils exhibit an amplitude proportional to said velocity;
- wherein said set of sense magnets is arranged in an annular ring, concentric with said rotation axis of said rotational part,
- wherein said set of sense magnets includes low-resolution poles;
- and
- wherein said plurality of sense coils each include a winding comprised of active segments, characterized by radial portions of said windings and inactive segments, characterized by circumferential portions of said winding.
5 more elements
An apparatus for determining the velocity of a rotating device comprising:
- a rotational part having a set of sense magnets affixed to a rotating shaft of said rotating device configured to rotate about a rotation axis;
- and
- a circuit assembly including, a circuit interconnection having a plurality of sense coils, one or more sensors affixed to said circuit assembly, said circuit assembly adapted to be in proximity to said sets of sense magnets;
- wherein said set of sense magnets combine with said circuit assembly to form an air core electric machine such that voltages generated from each sense coil of said plurality of sense coils exhibit an amplitude proportional to said velocity;
- wherein said set of sense magnets is arranged in an annular ring, concentric with said rotation axis of said rotational part;
- wherein said set of sense magnets comprises alternating poles equivalently sized and distributed about said annular ring at a circumference thereof
- wherein said set of sense magnets are oriented such that a magnetic field therefrom, radiates in the radial direction, orthogonal to said axis of rotation.
4 more elements
Dependencies are inferred from the claim text.