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US 8,427,139 B2Granted
Dual pole magnet structure having two magnets 90 degrees out of phase for position sensing in an actuator
AssigneeContinental Tire Canada, Inc.
InventorsMichal Malik, Jeremy Daniel Schmidt, Titus Dovancescu
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Abstract
An increment sensor assembly includes a magnet structure having at least two dual pole magnets that are magnetized 90 degrees out of phase. The magnet structure is mounted to an output shaft rotatable about an axis of rotation. At least one Hall effect sensor is associated with each magnet to determined polarity change of the magnet structure per quadrant.
Claims11
A position sensor assembly comprising:
- magnet structure having at least two dual pole magnets that are magnetized 90 degrees out of phase, the at least two dual pole magnets being mounted to a common output shaft for rotation, at the same rate, about a common axis of rotation;
- and
- at least one Hall effect sensor associated with each magnet to determined polarity change of the magnet structure per quadrant.
An engine actuator sensor assembly comprising:
- magnet structure having at least two dual pole magnets that are magnetized 90 degrees out of phase, the at least two dual pole magnets being mounted to a common output shaft for rotation, at the same rate, about a common axis of rotation;
- and
- at least one Hall effect sensor associated with each magnet to determined polarity change of the magnet structure per quadrant.
A method of measuring output shaft rotation for an engine actuator comprising:
- a) mounting a magnet structure, having at least two dual pole magnets that are magnetized 90 degrees out of phase, for rotation, at the same rate, about a common axis of rotation to a common output shaft;
- b) associating a Hall effect sensor with each magnet;
- and
- c) measuring an incremental position of the output shaft with the Hall effect sensors.
1 more element
Dependencies are inferred from the claim text.