Patent ID: 11898887
Assignee: MICROCHIP TECHNOLOGY INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A rotational-position sensor comprising:
a first sense coil defining a first continuous path around an axis, the first continuous path including four respective lobes;
a second sense coil defining a second continuous path around the axis, the second continuous path including four respective lobes;
respective ones of the first continuous path and the second continuous path for electrical current to flow between a first location and a second location, the respective ones of the first continuous path and the second continuous path comprising:
a first path portion defined as a generally clockwise path for the electrical current to flow around the axis;
a second path portion defined as a generally counter-clockwise path for the electrical current to flow around the axis;
the first path portion and the second path portion together defining at least a first lobe and a second lobe, the second lobe adjacent and meeting with the first lobe at an inter-lobe region; and
the inter-lobe region having a radial-direction-reversal region at which one of the first path portion or the second path portion changes from being a generally outward path along a portion of the first lobe for the electrical current to flow away from the axis to being a generally inward path along a portion of the second lobe for the electrical current to flow toward the axis in the same one of the generally clockwise path or the generally counter-clockwise path; and

a target to rotate around the axis, the target to cover all but half of a lobe of the four lobes of the first sense coil and all but half of a lobe of the four lobes of the second sense coil.