US 12,587,050 B2Granted

Flux concentrate type rotor having arc type permanent magnets

AssigneeLG Electronics Inc.

InventorsYounggeun Min, Hongsik Hwang, Kyungmo Yu, Jaeho Kim, Kyungho Ha

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Abstract

A flux concentrate type rotor includes a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core, and a plurality of arc type permanent magnets each inserted between two adjacent outer diameter portion cores. Each of the plurality of bridges includes a first straight portion extending in a radial direction of the rotor core, and a first angle θ1 between a first extension line connecting a center of the arc type permanent magnet and a center of the inner diameter portion core and a second extension line connecting a center of the first straight portion of the bridge and the center of the inner diameter portion core satisfies: θ1=5.75°±4°.

Claims18

Dependent claims

A flux concentrate type rotor comprising:

a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core;
and
a plurality of arc type permanent magnets, each of the plurality of arc type permanent magnets being inserted between two adjacent outer diameter portion cores of the plurality of outer diameter portion cores,
wherein each of the plurality of bridges includes a first straight portion extending in a radial direction of the rotor core,
wherein a first angle θ1 defined between a first extension line and a second extension line satisfies E(1):
θ
⁢
1
=
5.75
°
±
4
⁢
°
,
(
1
)
wherein the first extension line connects a center of each of the plurality of arc type permanent magnets with a center of the inner diameter portion core, and
wherein the second extension line connects a center of the first straight portion in a width direction with the center of the inner diameter portion core,
wherein each of the plurality of arc type permanent magnets includes:
a concave inner diameter portion having a first curvature, and
a convex outer diameter portion having a second curvature, wherein the convex outer diameter portion is positioned in a counterclockwise direction or a clockwise direction,
wherein, based on the convex outer diameter portion being positioned in the counterclockwise direction, the first extension line connects (i) the center of a first arc type permanent magnet among the plurality of arc type permanent magnets, the first arc type permanent magnet being disposed adjacent to a corresponding bridge of the plurality of bridges in the clockwise direction, with (ii) the center of the inner diameter portion core,
wherein, based on the convex outer diameter portion being positioned in the clockwise direction, the first extension line connects (i) the center of a first arc type permanent magnet of the plurality of arc type permanent magnets that is disposed adjacent to a corresponding bridge of the plurality of bridges in the counterclockwise direction with (ii) the center of the inner diameter portion core, and
wherein the first arc type permanent magnet satisfies Equation (2):
A
=
k
⁢
1
×
C
⁡
(
k
⁢
1
⁢
is
0.31
to
0.37
)
,
(
2
)
where A is a thickness of the first arc type permanent magnet, and C is the first curvature of the concave inner diameter portion.

47 more elements

A flux concentrate type rotor comprising:

a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core;
and
a plurality of arc type permanent magnets, each of the plurality of arc type permanent magnets being inserted between two adjacent outer diameter portion cores of the plurality of outer diameter portion cores,
wherein each of the plurality of bridges includes a first straight portion extending in a radial direction of the rotor core,
wherein a first angle θ1 defined between a first extension line and a second extension line satisfies Equation (1):
θ1
=
5.75
∘
±
4
∘
,
(
1
)
wherein the first extension line connects a center of each of the plurality of arc type permanent magnets with a center of the inner diameter portion core, and
wherein the second extension line connects a center of the first straight portion in a width direction with the center of the inner diameter portion core,
wherein each of the plurality of arc type permanent magnets includes:
a concave inner diameter portion having a first curvature, and
a convex outer diameter portion having a second curvature, wherein the convex outer diameter portion is positioned in a counterclockwise direction or a clockwise direction,
wherein, based on the convex outer diameter portion being positioned in the counterclockwise direction, the first extension line connects (i) the center of a first arc type permanent magnet among the plurality of arc type permanent magnets, the first arc type permanent magnet being disposed adjacent to a corresponding bridge of the plurality of bridges in the clockwise direction, with (ii) the center of the inner diameter portion core,
wherein, based on the convex outer diameter portion being positioned in the clockwise direction, the first extension line connects (i) the center of a first arc type permanent magnet of the plurality of arc type permanent magnets that is disposed adjacent to a corresponding bridge of the plurality of bridges in the counterclockwise direction with (ii) the center of the inner diameter portion core, and
wherein the first arc type permanent magnet satisfies E(3):
B
=
k
⁢
2
×
A
⁡
(
k
⁢
2
⁢
is
2.9
to
3.75
)
,
(
3
)
where A is a thickness of the first arc type permanent magnet, and B is a width of the first arc type permanent magnet.

44 more elements

A flux concentrate type rotor comprising:

a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core;
and
a plurality of arc type permanent magnets, each of the plurality of arc type permanent magnets being inserted between two adjacent outer diameter portion cores of the plurality of outer diameter portion cores,
wherein each of the plurality of bridges includes a first straight portion extending in a radial direction of the rotor core,
wherein a first angle θ1 defined between a first extension line and a second extension line satisfies Equation (1):
θ1=5.75°±4°, (1)
wherein the first extension line connects a center of each of the plurality of arc type permanent magnets with a center of the inner diameter portion core, and
wherein the second extension line connects a center of the first straight portion in a width direction with the center of the inner diameter portion core,
wherein each of the plurality of arc type permanent magnets includes:
a concave inner diameter portion having a first curvature, and
a convex outer diameter portion having a second curvature, wherein the convex outer diameter portion is positioned in a counterclockwise direction or a clockwise direction,
wherein, based on the convex outer diameter portion being positioned in the counterclockwise direction, the first extension line connects (i) the center of a first arc type permanent magnet among the plurality of arc type permanent magnets, the first arc type permanent magnet being disposed adjacent to a corresponding bridge of the plurality of bridges in the clockwise direction, with (ii) the center of the inner diameter portion core,
wherein, based on the convex outer diameter portion being positioned in the clockwise direction, the first extension line connects (i) the center of a first arc type permanent magnet of the plurality of arc type permanent magnets that is disposed adjacent to a corresponding bridge of the plurality of bridges in the counterclockwise direction with (ii) the center of the inner diameter portion core, and
wherein the first arc type permanent magnet satisfies E(5):
D
=
k
⁢
4
×
C
⁡
(
k
⁢
4
⁢
is
0.62
to
0.98
)
,
(
5
)
where C is the first curvature of the concave inner diameter portion and D is the second curvature of the convex outer diameter portion.

34 more elements

Dependencies are inferred from the claim text.