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

Claim 0:
1. 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,
a width of the split magnet in a circumferential direction is the same as a width of the index magnet in the circumferential direction,
each of the split magnets and the index magnet are formed by combining a first pole and a second pole,
a width of the first pole of the split magnet in the circumferential direction is the same as a width of the second pole of the split magnet in the circumferential direction, and
a width of the first pole of the index magnet in the circumferential direction is different from a width of the second pole of the index magnet in the circumferential direction,
wherein a ratio of a width of the first pole of the index magnet to a width 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.