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Rotating electrical machine with embedded permanent magnet

A technology of rotating electrical machines and permanent magnets, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, magnetic circuit, etc., can solve problems such as rotor damage

Active Publication Date: 2015-12-23
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, there is a problem that the stress may be concentrated on the intermediate bridge and the rotor may be damaged.

Method used

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  • Rotating electrical machine with embedded permanent magnet
  • Rotating electrical machine with embedded permanent magnet
  • Rotating electrical machine with embedded permanent magnet

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0040] figure 1 It is a vertical cross-sectional view showing the overall structure of the permanent magnet-embedded rotating electrical machine according to the first embodiment of the present invention. exist figure 1 Among them, the frame 1 is a frame that covers the entire permanent magnet-embedded rotating electrical machine, and is formed of iron, aluminum, stainless steel, or the like. Inside the frame 1, a hollow cylindrical fixed-side iron core 2 is provided. The fixed-side iron core 2 is formed by laminating silicon steel sheets. A hole is provided in the fixed-side iron core 2, and a stator winding (not shown) made of copper wire or the like penetrates through the hole. The rotor 3 as the rotating side core penetrates inside the fixed side core 2 with a predetermined gap interposed between the rotor 3 and the fixed side core 2 . The rotor 3 is formed by laminating silicon steel plates. In addition, the rotor 3 may be formed by cutting a simple iron block. A ...

no. 2 Embodiment approach

[0068] Figure 4 It is a perspective view which shows the structure of the rotor 3A of 2nd Embodiment of this invention. in addition, Figure 5 It is a front view of the rotor 3A viewed from the direction of the rotation center axis 4a. In addition, in Figure 4 and Figure 5 In FIG. 2 , for easy understanding of the structure of the rotor 3A, the structure of the rotor 3A is shown in a state in which a part is cut away by two planes perpendicular to the rotation center axis 4 a. In addition, in Figure 4 and Figure 5 , against the above figure 2 and image 3 Parts that are the same as those shown are denoted by common reference numerals, and description thereof will be omitted.

[0069] In the rotor 3A of this embodiment, the intermediate plate 300A has holes 301a, 301b, and at least a part of the holes 301a, 301b are opposed to the regions where the magnets of the rotor steel are embedded in the holes 35a, 35b, and the holes 301a, 301b It has a different shape and...

no. 3 Embodiment approach

[0072] Figure 6 It is a front view of the rotor 3B according to the third embodiment of the present invention seen from the direction of the rotation center axis 4a. In addition, in Figure 6 In FIG. 2 , for easy understanding of the structure of the rotor 3B, the rotor 3B is shown in a state in which a part is cut away by two planes perpendicular to the rotation center axis 4 a. In addition, in Figure 6 , against the above image 3 Parts that are the same as those shown are assigned common reference numerals, and description thereof will be omitted.

[0073] The rotor 3B of the present embodiment has an intermediate plate 300B having holes in the same manner as in the second embodiment described above. However, in this embodiment, the holes 302a, 302b provided in the intermediate plate 300B have a shape and a size that allow the permanent magnets 34a, 34b fitted in the magnet insertion holes 35a, 35b to pass through.

[0074] Also in this embodiment, the same effect as...

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Abstract

Provided is a rotating electrical machine with embedded permanent magnet such that the rotor can be protected from breaking during the manufacture of the rotor. A rotor (3) in which the outer periphery of the rotor communicates with embedded magnet slots (35a, 35b) is provided in a permanent magnet embedded motor in which one pole is constituted by two permanent magnets (34a, 34b) and multi-pole permanent magnets are embedded in a rotor. The rotor (3) has a q-axis projection (37) projecting in a direction away from the rotation center of the rotor between mutually adjacent poles. The embedded magnet slots (35a, 35b) are arranged to form a reverse V shape. An outer peripheral edge (33) outside the permanent magnets (34a, 34b) has a radius of curvature that is smaller than the distance from a rotation center axis (4a) to the outermost periphery of the rotor. A round intermediate plate (300) having an outer diameter larger than the outer diameter of a rotor steel plate is provided in the middle of the rotor (3) in the rotation axis direction.

Description

technical field [0001] The present invention relates to a rotating electric machine with a rotor, such as a motor and a generator, in particular to a permanent magnet embedded rotating electric machine in which a permanent magnet is embedded in the rotor. Background technique [0002] Figure 7 of (a), Figure 7 (b) is a cross-sectional view showing the structure of a rotor of an IPM motor, which is an example of a conventional permanent magnet-embedded rotating electrical machine, Figure 7 (c) is a figure which shows the outer peripheral surface of this rotor. The IPM motor of this conventional example is the motor disclosed in patent document 1. As shown in FIG. This IPM motor uses two permanent magnets 13a, 13b arranged in a V-shape so as to expand toward the outside of the rotor 10 as one pole, and a plurality of sets of two permanent magnets 13a, 13b are embedded in the rotor 10 to form a plurality of poles. pole. In addition, the rotor 10 is achieved by placing Fig...

Claims

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Application Information

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IPC IPC(8): H02K1/27
CPCH02K1/2766H02K16/02H02K2201/03H02K2213/12H02K1/2746
Inventor 持田敏治鸟羽章夫岛田大志西村博文
Owner FUJI ELECTRIC CO LTD
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