Embedded permanent magnet rotary electric machine
A technology of rotating electrical machines and permanent magnets, which is applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit rotating parts, electric components, etc., and can solve the problems of less cooling air volume and inability to effectively cool permanent magnets , to achieve the effects of suppressing temperature rise, improving performance, and reducing ventilation resistance
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[0045] Implementation mode one
[0046] figure 1 Is a cross-sectional view showing the permanent magnet embedded type rotating electrical machine according to the first embodiment of the present invention, figure 2 It is a perspective view showing the stator of the permanent magnet embedded rotating electric machine according to the first embodiment of the present invention, image 3 It is a perspective view showing the rotor core in the permanent magnet embedded rotating electric machine according to the first embodiment of the present invention, Figure 4 It is a perspective view explaining a state where the rotor core is assembled to the stator of the permanent magnet embedded rotating electric machine according to the first embodiment of the present invention, Figure 5 It is a cross-sectional view explaining the flow of cooling air in the permanent magnet embedded rotating electric machine according to the first embodiment of the present invention. In addition, in figure 2 a...
Example Embodiment
[0061] Implementation mode two
[0062] Figure 7 Is a cross-sectional view showing a permanent magnet embedded rotating electric machine according to the second embodiment of the present invention, Figure 8 It is a cross-sectional view explaining the flow of cooling air in the permanent magnet embedded rotating electric machine according to the second embodiment of the present invention. In addition, in Figure 8 In the middle, the arrows indicate airflow.
[0063] in Figure 7 Here, the flow path groove 25 has the same axial length as the axial length of the stator core 2, and the inner circumferential surface of the outer frame 8 is displaced forwardly relative to the stator core 2 over the entire circumference. Formed by depression. The inner frame 9 is fitted and fixed to the inner side of the outer frame 8, and a cylindrical void portion 26 configured to close the opening of the flow path groove 25 is formed between the outer frame 8 and the inner frame 9. In addition, twe...
Example Embodiment
[0071] Implementation mode three
[0072] Picture 9 It is a cross-sectional view showing a permanent magnet embedded rotating electric machine according to the third embodiment of the present invention. In addition, in Picture 9 In the middle, the arrows indicate airflow.
[0073] in Picture 9 Here, the cooling air guide 29 is formed on the inner wall surface of the front frame 10 from the outer diameter side of the centrifugal fan 23 to the frame 7. The cooling air guide 29 is formed by bending the inner wall surface of the front frame 10 in an arc shape so that the distance between the inner wall surface of the front frame 10 and the frame 7 in the axial direction is gradually reduced from the outer diameter side of the centrifugal fan 23 toward the radially outer side. of.
[0074] In addition, the other structure is the same as the second embodiment described above.
[0075] In the permanent magnet embedded rotating electric machine 102 constructed in this way, the centrifuga...
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