Sensing device
An embodiment may provide a sensing device comprising: a stator comprising stator teeth; and a rotor comprising magnets, wherein: the stator teeth comprise a first stator tooth and a second stator tooth arranged to overlap the first stator tooth in the radial direction from the center of the stator; the first stator tooth comprises multiple first teeth and multiple third teeth, and the second stator tooth comprises multiple second teeth; one of the multiple first teeth is arranged to overlap one of the multiple second teeth in the radial direction; and the magnets are disposed between the multiple first teeth and the multiple third teeth, respectively.
1. A sensing device comprising:
a stator; and
a rotor including a magnet,
wherein the stator includes a first stator tooth and a second stator tooth,
wherein the first stator tooth includes a first body, a first tooth, and a third tooth,
wherein the second stator tooth includes a second body and a second tooth,
wherein the third tooth is connected to the first body,
wherein an inner diameter of the second tooth is smaller than an inner diameter of the second body,
wherein a distance between the first body and the second body is different from a distance between the first tooth and the second tooth in a radial direction.
2. The sensing device of claim 1 , wherein:
the stator includes a stator holder and a stator body coupled to the stator holder; and
the first stator tooth and the second stator tooth are disposed in the stator body.
3. The sensing device of claim 2 , wherein the stator body includes a first hole through which the first tooth passes, a second hole through which the second tooth passes, and a third hole through which the third tooth passes.
4. The sensing device of claim 1 ,
wherein the second body includes a protruding portion configured to protrude toward the sensor,
wherein a collector is disposed between the protruding portion and the sensor.
5. The sensing device of claim 1 ,
wherein a width of a lower end of the third tooth in a circumferential direction is smaller than a width of a lower end of the first tooth in the circumferential direction.
6. A sensing device comprising:
a stator including stator teeth; and
a rotor including a magnet,
wherein the stator teeth include a first stator tooth and a second stator tooth disposed to overlap the first stator tooth in a radial direction from a center of the stator,
wherein the first stator tooth includes a plurality of first teeth and a plurality of third teeth,
wherein the second stator tooth includes a plurality of second teeth,
wherein the second teeth and the third teeth are disposed on a virtual first circumference; and
the first teeth are disposed on a virtual second circumference different from the virtual first circumference.
7. The sensing device of claim 6 , wherein:
the magnet is disposed between the plurality of first teeth and the plurality of second teeth.
8. The sensing device of claim 7 , wherein:
the magnet is disposed between the first teeth and the third teeth in the radial direction.
9. The sensing device of claim 6 ,
wherein the first teeth, the second teeth, and the third teeth are concentrically disposed.
10. The sensing device of claim 6 , wherein the third teeth and the second teeth are alternately disposed along a circumferential direction of the stator.