Motor with sensor coil
An embodiment may provide a motor including a shaft, a rotor including a rotor core and a coil disposed on the rotor core, a stator disposed outside the rotor, a substrate electrically connected to the coil, and a first housing in which the substrate is disposed and which is coupled to the shaft and the rotor, wherein the substrate includes a sensor and a coil connected to the sensor, the first housing includes a hole, the stator includes a yoke and a magnet disposed on the yoke, the yoke includes a plurality of protrusions, and the protrusions and the hole are disposed to overlap the coil in an axial direction.
1. A motor comprising:
a shaft;
a rotor including a rotor core and a first coil disposed on the rotor core;
a stator including a yoke and a magnet disposed on the yoke;
a substrate electrically connected to the first coil; and
a first housing coupled to the rotor,
wherein
the rotor is disposed in the stator,
the substrate includes a sensor and a second coil connected to the sensor,
the first housing includes a hole,
the yoke includes a plurality of protrusions, and
the protrusions and the hole are disposed to overlap the second coil in an axial direction.
2. The motor of claim 1 , further comprising a second housing rotatably supporting each of the shaft and the rotor core,
wherein the rotor core is disposed above the second housing.
3. The motor of claim 2 , wherein:
the second housing includes a second body and a bearing housing protruding from the second body;
the motor further comprises a plurality of bearings disposed in the bearing housing; and
some of the plurality of the bearings are disposed to overlap the first housing in a radial direction.
4. The motor of claim 2 , wherein:
the yoke includes a first body having an annular shape and a flange extending from the first body; and
the second housing is in contact with the flange.
5. The motor of claim 1 , wherein:
the yoke includes a first body having an annular shape; and
the protrusions protrude inward from the first body.
6. A motor comprising:
a second substrate;
a stator disposed on the second substrate;
a rotor disposed above the stator; and
a first substrate disposed between the stator and the rotor;
a coil disposed on the first substrate; and
a connecting member electrically connecting the first substrate and the second substrate,
wherein
the rotor includes a first housing and a plurality of protrusions protruding from the first housing,
the plurality of protrusions and the coil overlap in a vertical direction,
the first substrate includes an opening disposed inside the coil.
7. The motor of claim 6 , wherein:
the plurality of protrusions are disposed to form a circular shape; and
the coil is disposed to have a shape corresponding to the circular shape.
8. The motor of claim 6 , further comprising a sensing part disposed between the stator and the rotor,
wherein the sensing part includes a first sensing member disposed on an upper surface of the first substrate, and
wherein the first substrate includes:
a first region in which the first sensing member is disposed and which has a circular band shape; and
a second region which protrudes inward from the first region and in which a second sensing member is disposed.
9. The motor of claim 6 , wherein the stator includes a second housing and a stator core, the protrusions of the rotor protrude from a lower surface of the first housing, and the first substrate is disposed between the stator core and a bottom surface of the second housing.
10. The motor of claim 9 , wherein the second housing includes an outer wall and an inner wall, and the stator core is coupled to the inner wall.