Apparatus for sensing rotor location and motor comprising apparatus
AssigneeLG Innotek Co., Ltd.
InventorsShung Hun Woo, Nam Hoon Kim
Life of this patent
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Abstract
The present invention provides an apparatus for sensing rotor location, the apparatus comprising: a central shaft; a magnet coupled to the central shaft; a sensor portion is disposed correspond to the magnet; wherein the sensor portion comprising a substrate, a first group including a first Hall sensor and a third Hall sensor disposed on the substrate, and a second group including a second Hall sensor and a fourth Hall sensor, the first Hall sensor and the third Hall sensor are arranged to overlap in a radial direction about the central shaft and the second Hall sensor and the fourth Hall sensor are arranged to overlap in a radial direction about the central shaft.
Claims10
A motor comprising:
- a central shaft;
- a sensing magnet including a main magnet and a sub-magnet coupled to the central shaft;
- and
- a substrate disposed above the sensing magnet,
- wherein the substrate includes a plurality of first hall sensors and a plurality of second hall sensors disposed on a first circumference of which the central shaft is a center, and a plurality of third hall sensors and a plurality of forth hall sensors disposed on a second circumference of which the central shaft is the center,
- wherein a radius of the second circumference is greater than a radius of the first circumference,
- wherein the plurality of first hall sensors and the plurality of third hall sensors form a first group,
- wherein the plurality of second hall sensors and the plurality of forth hall sensors form a second group,
- wherein the first group is spaced apart from the second group in the circumferential direction,
- wherein at least one of the third hall sensors is disposed at the same position as the one of first hall sensors in the circumferential direction.
Dependencies are inferred from the claim text.