ROTOR ASSEMBLY AND MOTOR INCLUDING SAME

• US 20170338711A1
• Filed: 12/04/2015
• Published: 11/23/2017
• Est. Priority Date: 12/10/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: YU, Hyun Soo
• Granted Patent: US 10,594,185 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 1/22 Rotating parts of the magnetic circuit
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 2213/03 Machines characterised by numerical values, ranges, mathematical expressions or similar information
• CPC Class Codes: H02K 3/46 Fastening of windings on the stator or rotor structure
• CPC Class Codes: H02K 3/487 Slot-closing devices
• CPC Class Codes: H02K 3/527 applicable to rotors only
• CPC Class Codes: H02K 5/04 Casings or enclosures characterised by the shape, form or construction thereof
• CPC Class Codes: H02K 7/003 Couplings; Details of shafts means for mounting rotors on shafts H02K1/28
• CPC Class Codes: H02K 9/06 with fans or impellers driven by the machine shaft

Abstract

Disclosed in an embodiment are a rotor assembly and a motor including the same, the rotor assembly including: a rotor part; and a first cover including a first fixing plate for covering one side of the rotor part and a plurality of first vane parts protruding from the first fixing plate, wherein a first angle, which is formed by an imaginary line extending from an outer end of each of the first vane parts and a tangential line of a first imaginary circle, is greater than a second angle formed by an imaginary line extending from an inner end of each of the first vane parts and a tangential line of a second imaginary circle, centers of the first imaginary circle and the second imaginary circle are the same as a center of the first fixing plate, the tangential line of the first imaginary circle is a tangential line at a position at which the first imaginary circle and the outer end meet and the tangential line of the second imaginary circle is a tangential line at a position at which the second imaginary circle and the inner end meet.

Claims

1. A rotor assembly comprising:

a rotor part; and

a first cover including a first fixed plate covering one side of the rotor part and a plurality of first vane parts protruding from the first fixed plate,

wherein a first angle between an imaginary line extending from an outer end of each of the first vane parts and a tangential line of a first imaginary circle is greater than a second angle between an imaginary line extending from an inner end of each of the first vane parts and a tangential line of a second imaginary circle,

wherein centers of the first imaginary circle and the second imaginary circle correspond to a center of the first fixed plate,

wherein the tangential line of the first imaginary circle is a tangential line at a point at which the first imaginary circle and the outer end meet, and

wherein the tangential line of the second imaginary circle is a tangential line at a point at which the second imaginary circle and the inner end meet.

2. The rotor assembly of claim 1, wherein the first imaginary circle is a circle connecting the outer ends of the plurality of first vane parts, and

the second imaginary circle is a circle connecting the inner ends of the plurality of first vane parts.

3. The rotor assembly of claim 1, wherein the first angle is greater than 50°

and less than 60°

, and

the second angle is greater than 25° and

less than 35°

.

4. The rotor assembly of claim 1, wherein the plurality of first vane parts are inclined in a rotation direction of a motor.

5. The rotor assembly of claim 1, wherein the plurality of first vane parts are inclined in the direction opposite to a rotation direction of a motor.

6. The rotor assembly of claim 1, wherein the first cover includes a through hole formed in the first fixed plate.

7. The rotor assembly of claim 1, wherein the rotor part includes a plurality of slits formed in a longitudinal direction, and

the first cover includes a support part inserted into the plurality of slits and fixed to the rotor part.

8. The rotor assembly of claim 1, wherein the rotor part includes:

a rotor core including a center part, a plurality of connection parts formed radially from the center part, and a plurality of protrusion parts protruding from both ends of the connection parts in a circumferential direction; and

a first coil wound around the connection parts.

9. The rotor assembly of claim 8, further comprising:

a rotation shaft passing through the center part of the rotor core; and

a terminal supported on the rotation shaft and applying power to the first coil.

10. The rotor assembly of claim 1, wherein the first fixed plate includes:

a ring-shaped edge part having the first vane parts formed thereon; and

a center part sunken from the edge part.

11. The rotor assembly of claim 1, further comprising a second cover covering the other side of the rotor part,

wherein the second cover includes a second fixed plate covering the other side of the rotor part and a second vane part protruding from the second fixed plate, and

the second cover is formed to be symmetrical to the first cover.

12. A motor comprising:

a housing having a plurality of through holes formed on an outer circumferential surface thereof;

a stator part supported by the housing; and

a rotor assembly disposed to be rotatable around the stator part,

wherein the rotor assembly includes;

a rotor part; and

a first cover including a first fixed plate covering one side of the rotor part, and a plurality of first vane parts protruding from the first fixed plate,

wherein a first angle between an imaginary line extending from an outer end of each of the first vane parts and a tangential line of a first imaginary circle is greater than a second angle between an imaginary line extending from an inner end of each of the first vane parts and a tangential line of a second imaginary circle,

wherein centers of the first imaginary circle and the second imaginary circle correspond to a center of the first fixed plate,

wherein the tangential line of the first imaginary circle is a tangential line at a point at which the first imaginary circle and the outer end meet, and

wherein the tangential line of the second imaginary circle is a tangential line at a point at which the second imaginary circle and the inner end meet.

13. The motor of claim 12, wherein the housing includes:

a first housing disposed on one side of the stator part; and

a second housing disposed on the other side of the stator part.

14. The motor of claim 13, wherein a part of the rotor assembly is exposed between the first housing and the second housing.

15. The motor of claim 12, wherein the housing includes a plurality of heat dissipation parts formed along an outer circumferential surface thereof.

16. The motor of claim 12, wherein the first imaginary circle is a circle connecting the outer ends of the plurality of first vane parts, and

the second imaginary circle is a circle connecting h inner ends of the plurality of first vane parts.

17. The motor of claim 12, wherein the first angle is greater than 50°

and less than 60°

, and the second angle is greater than 25° and

less than 35°

.

18. The motor of claim 12, wherein the rotor part includes:

a rotor core including a center part, a plurality of connection parts formed radially from the center part, and a plurality of protrusion parts protruding from both ends of the connection parts in a circumferential direction; and

a first coil wound around the connection parts.

19. The motor of claim 18, further comprising:

a rotation shaft passing through the center part of the rotor core; and

a terminal supported on the rotation shaft and applying power to the first coil.

20. The motor of claim 12, wherein the first fixed plate includes:

a ring-shaped edge part having the first vane parts formed thereon; and

a center part sunken from the edge part.