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Rotor

A rotor and rotor core technology, applied in the field of embedded magnet synchronous motors, can solve the problems of motor torque density reduction and achieve the effect of preventing torque density reduction

Active Publication Date: 2013-04-03
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a problem that the torque density of the motor decreases with respect to the rotor core using magnets of the same length as the depth of the magnet insertion hole.

Method used

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Experimental program
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no. 1 approach ）

[0038] figure 1 It is an explanatory diagram of the rotor 1 according to the first embodiment of the present invention. figure 1 (a) is a sectional view showing a plane perpendicular to the axial direction of the rotor 1 . figure 1 (b) means figure 1 (a) A-A section view.

[0039] The rotor 1 is configured by inserting the permanent magnets 20 into the magnet holes 30 formed in the rotor core 10 .

[0040] The rotor core 10 is formed by laminating flat plates 11 made of electromagnetic steel sheets in the axial direction (direction of the rotation axis of the rotor 1 ). Such as figure 1 As shown in (a), the plates 11 are respectively pierced with shaft holes 12 through which the shaft penetrates in the center, and around the shaft holes 12 are pierced with openings on the end surface of the rotor core 10 at equal intervals along the circumferential direction and along the A magnet hole 30 penetrating in the axial direction.

[0041] In the rotor core 10 , the permanent m...

no. 2 approach ）

[0073] Next, a second embodiment of the present invention will be described.

[0074] Figure 7 and Figure 8 It is an explanatory diagram of the rotor core 10 according to the second embodiment of the present invention.

[0075] In the above-mentioned first embodiment, the different eccentric masses 10a and 10b are configured by stacking the front and back surfaces of the plates 11 having the same shape in opposite directions. On the other hand, in 2nd Embodiment, the connection block 15 is arrange|positioned between different eccentric mass 10a, 10b. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description is abbreviate|omitted.

[0076] Figure 7 (a) is explanatory drawing of the main part of the plate 11a which comprises the eccentric mass 10a. Figure 7 (b) is explanatory drawing of the main part of the plate 11b which comprises the connection block 15. FIG. Figure 7 (c) is explanatory drawing of the main ...

no. 3 approach ）

[0085] Next, a third embodiment of the present invention will be described.

[0086] Figure 9 It is an explanatory diagram of the rotor core 10 according to the third embodiment of the present invention.

[0087] Figure 9 (a) is a perspective view of the permanent magnet 21 of the third embodiment. Figure 9 (b) represents the rotor core 10 figure 1 (a) A-A section view. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description is abbreviate|omitted.

[0088] In the third embodiment, by carefully designing the shape of the permanent magnet 21, the gap 31 is communicated between different eccentric masses 10a, 10b.

[0089] Specifically, as Figure 9 As shown in (a), a notch 25 is formed in a portion perpendicular to a surface 22 on one end side in the circumferential direction of the permanent magnet 21 that is horizontal to the axial direction, and a surface 23 on one end side perpendicular to the axial direct...

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Abstract

The present invention provides a rotor in which the volume of permanent magnet is not reduced. A rotor core (10) is composed of a first stacked block (10a) and a second stacked block (10b) which are fixed through movement along a rotation direction. Each magnet hole (30) is provided with a first clearance part (31a) and a second clearance part (31b) without permanent magnet at one end and the other end in the rotation direction. At the part where the first stacked block is jointed with the second stacked block, the area of at least one in the first clearance part and the second clearance part is enlarged according to a mode that the first clearance parts are intercommunicated as well as the second clearance parts.

Description

technical field [0001] The present invention relates to an embedded magnet type synchronous motor. Background technique [0002] In an embedded magnet type synchronous motor (so-called IPM motor) configured by embedding permanent magnets in a rotor core (rotor core), the rotor has the following structure. [0003] The rotor is composed of a rotor core manufactured by laminating electromagnetic steel sheets provided with a plurality of magnet holes, and permanent magnets inserted into the magnet holes. A gap portion (flux barrier) extending in the direction of the rotation axis of the rotor core is provided at the circumferential end of the magnet hole to prevent short-circuiting of the magnetic flux of the magnet. In addition, in order to fix the magnet in the magnet hole, the space is filled with a filling material such as resin or adhesive. [0004] Among such rotor cores, there is known a rotor structure in which the rotor core is divided into a plurality of blocks in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/28
Inventor 池见健木村真秀
Owner NISSAN MOTOR CO LTD
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