电机转子、电机及压缩机

Abstract

本实用新型提供一种电机转子、电机及压缩机，其中电机转子，包括转子铁芯，所述转子铁芯上具有沿其周向布置的多个磁极，各所述磁极下具有磁钢，还包括设于所述转子铁芯的轴向端面的不锈钢挡板，所述不锈钢挡板用于实现对所述磁钢的轴向限位，所述不锈钢挡板的外环区域上形成有多个贯通所述不锈钢挡板的两侧端面的第一隔磁孔，各所述第一隔磁孔分别处于相邻两个所述磁极之间的极间区域内，且在沿所述转子铁芯的轴向投影形成的径向平面上，相邻的两个磁极内分别具有的所述磁钢的相邻的端部处于所述第一隔磁孔内。本实用新型能够降低极间漏磁量，提升定转子气隙的磁通量，提升电机出力以及电机效率。

Claims

1. An electric machine rotor, comprising a rotor core (1) having a plurality of magnetic poles arranged along the circumference thereof, each of the magnetic poles having a magnetic steel (2) thereunder, and further comprising a stainless steel baffle (3) provided at the axial end face of the rotor core (1) for realizing axial positioning of the magnetic steel (2), characterized in that, Multiple first magnetic isolation holes (31) are formed on the outer ring area of ​​the stainless steel baffle (3) through both end faces of the stainless steel baffle (3). Each first magnetic isolation hole (31) is located in the inter-pole region between two adjacent magnetic poles. On the radial plane formed by the axial projection of the rotor core (1), the adjacent ends of the magnets (2) in the two adjacent magnetic poles are located in the first magnetic isolation holes (31).

2. The electric machine rotor of claim 1, wherein, For the two magnets (2) corresponding to the same first magnetic isolation hole (31), the minimum distance between the magnet (2) and the hole wall of the first magnetic isolation hole (31) is L0, L0 / δ≥1.5, where δ is the radial width of the stator-rotor air gap formed between the two after the motor rotor is assembled in the stator hole of the corresponding motor stator.

3. The motor rotor of claim 1, wherein The first magnetic isolation hole (31) is a notch structure that communicates with the outer circumferential wall of the stainless steel baffle (3). The sum of the circumferential lengths of the notches in the first magnetic isolation hole (31) on the outer circumferential wall of the stainless steel baffle (3) is s. The outer diameter of the rotor core (1) is d, and 0.21≤s / d≤0.

68.

4. The motor rotor of claim 1, wherein, A first magnetic isolation bridge (311) is formed between the first magnetic isolation hole (31) and the outer circumferential wall of the stainless steel baffle (3), and the radial width of the first magnetic isolation bridge (311) does not exceed 0.6 mm.

5. The electrical machine rotor according to any one of claims 1 to 4, characterized in that, At the positions corresponding to the pole regions of the stainless steel baffle (3) and the rotor core (1), rivet holes (32) and second magnetic isolation holes (33) are respectively constructed through the two end faces of the stainless steel baffle (3), wherein the second magnetic isolation hole (33) is located between the rivet hole (32) and the first magnetic isolation hole (31).

6. The motor rotor of claim 5, wherein, The axial thickness of the stainless steel baffle (3) is t, and the minimum radial distance between the second magnetic isolation hole (33) and the first magnetic isolation hole (31) is L1, 0.5≤L1 / t≤1.

5.

7. The motor rotor of claim 6, wherein, In the same inter-pole region, the second magnetic isolation hole (33), the first magnetic isolation hole (31) and the rivet hole (32) are symmetrical about the q-axis of the inter-pole region; and / or, the rotor core (1) is formed by stacking multiple silicon steel sheets, the thickness of which is t0, 1.66≤t / t0≤2.

68.

8. The electric machine rotor of claim 7, wherein, The minimum radial width L2 of the second magnetic isolation hole (33) is formed between the two points where the second magnetic isolation hole (33) intersects with the q axis, and L2 / δ≥1.1, where δ is the radial width of the stator-rotor air gap formed between the motor rotor and the stator hole corresponding to the motor stator; and / or, in the direction perpendicular to the q axis, the radial width of the second magnetic isolation hole (33) gradually increases from both sides of the q axis.

9. The electric machine rotor of claim 8, wherein, A second magnetic bridge (331) is formed between the first magnetic isolation hole (31) and the second magnetic isolation hole (33), and the radial width of the second magnetic bridge (331) does not exceed the minimum radial width of the magnetic conductive area formed by the stainless steel baffle (3) after punching.

10. The electric machine rotor of claim 9, wherein, The radial width of the second magnetic isolation bridge (331) is wg, where wg = 0.5t ~ 1.5t.

11. The motor rotor according to claim 1, characterized in that, The stainless steel baffle (3) does not contain nitrogen in its material composition.

12. An electric machine characterized by The motor rotor includes any one of claims 1 to 11.

13. A compressor characterized by, The motor rotor includes any one of claims 1 to 11.

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