Patent ID: 11962201
Assignee: LG INNOTEK CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A motor comprising:
a rotary shaft;
a yoke coupled to the rotary shaft;
a stator disposed between the rotary shaft and the yoke;
a first magnet and a second magnet disposed in the yoke; and
a circuit board on which a first Hall sensor is disposed to correspond to the first magnet and a second Hall sensor is disposed to correspond to the second magnet,
wherein the second magnet is disposed outside the first magnet in a radial direction,
wherein the second magnet includes a plurality of split magnets and one index magnet,
an area of the split magnet is the same as an area of the index magnet,
each of the split magnets and the index magnet is formed by combining a first pole and a second pole divided in a circumferential direction;
an area of the first pole is the same as an area of the second pole in the split magnet; and
an area of the first pole is different from an area of the second pole in the index magnet,
wherein a ratio of an area of the first pole of the index magnet to an area of the second pole of the index magnet is N:M;
a sum of the N and the M is 10;
the N is in a range of 3.1 to 3.9; and
the M is in a range of 6.1 to 6.9.