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Rotating electrical machine

A rotary motor and rotary drive technology, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems of increased torque loss and decreased efficiency of the rotary motor, and achieves the advantages of suppressing the increase in manufacturing cost, simple structure, and efficient cooling. Effect

Inactive Publication Date: 2015-12-02
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cooling oil is stirred by the fan running at high speed, so the torque loss increases, which creates a problem that the efficiency of the rotating motor decreases

Method used

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  • Rotating electrical machine
  • Rotating electrical machine
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Experimental program
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Effect test

Embodiment approach 1

[0029] based on figure 1 and figure 2 A rotating electric machine according to Embodiment 1 of the present invention will be described. figure 1 is an axial sectional view showing the rotating electric machine according to Embodiment 1 of the present invention, figure 2 is a radial sectional view. In addition, in all the following drawings, the same code|symbol is attached|subjected to the same part in a figure. The rotating electric machine according to Embodiment 1 includes: a shaft 1 for rotational driving; a rotor 2 provided on the peripheral surface of the shaft 1; a stator 3 disposed opposite to the outer peripheral surface of the rotor 2; bearings supporting both ends of the shaft 1, and housing The casing of the rotor 2 and the stator 3.

[0030] figure 1 Among them, the housing is composed of three frames, the front frame 5 , the middle frame 6 and the rear frame 7 . The ring-shaped divided stator 3 is fitted to a cylindrical iron frame 4 , and the iron frame ...

Embodiment approach 2

[0049] In Embodiment 2 of the present invention, using Figure 4 ~ Figure 11 Various modified examples for improving the cooling effect of the cooling mechanism for the rotating electric machine described in the first embodiment will be described. In addition, since the overall configuration of the rotating electric machine according to Embodiment 2 is the same as that of Embodiment 1, description thereof will be omitted (see figure 1 ).

[0050] As a modified example for increasing the flow rate of the circulating air flow, such as Figure 4 As shown, a plurality of rotor outer peripheral grooves 23 penetrating in the axial direction are formed on the outer peripheral surface of the rotor 2 . As a result, the gap 19 between the rotor 2 and the stator 3 and the rotor outer circumferential groove 23 become a ventilation path outside the rotor 2, and the flow rate of the circulating air flow outside the rotor 2 increases, thereby improving the cooling effect.

[0051] In addi...

Embodiment approach 3

[0061] Figure 12 The load-side end plate of the electric rotating machine concerning Embodiment 3 of this invention is shown, (a) is a top view, (b) is an axial cross-sectional view. In the figure, H represents the oil level height of the cooling oil. In addition, since the overall configuration of the rotating electrical machine according to Embodiment 3 is the same as that of Embodiment 1, description thereof will be omitted (see figure 1 ).

[0062] The spray generating means only needs to have the function of splashing the cooling oil stored in the casing with the rotation of the rotor 2, so it may be any one of the load side end plate 17 and the non-load side end plate 18, or this may be used. two. That is, the recessed portion for improving the cooling oil splashing ability may be provided on either one of the load-side end plate 17 and the non-load-side end plate 18 , or may be provided on both of them. In Embodiment 1 and Embodiment 2 above, the non-load-side end ...

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Abstract

A mist is generated by scooping up cooling oil using a lower end portion of a non-load side end plate. Air containing this mist is circulated by a centrifugal fan provided to a load side end plate to form a recirculating air current flowing through first through-holes in a rotor core and through a ventilation passage on the outside of a rotor in opposite directions. According to a cooling mechanism as above, a mist generated in at least one point in the housing can be supplied with the recirculating air current to every point across a whole area within the machine. Hence, both of the rotor and a stator can be cooled efficiently with a small amount of mist.

Description

technical field [0001] The invention relates to a rotating electric machine. Background technique [0002] As a conventional cooling mechanism for a rotating electrical machine, cooling oil is stored in a case housing a rotor and a stator of the rotating electrical machine, and a fan is installed on one of the end plates provided at both ends of the rotor (Patent Document 1). The height of the cooling oil is adjusted so that the fan is immersed in the cooling oil when the fan is positioned at the lowest end due to the rotation of the rotor. As a result, when the rotor rotates, the fan generates wind and splashes the cooling oil to efficiently cool the stator. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 5023100 Contents of the invention [0006] The technical problem to be solved by the invention [0007] In the case of employing the above-mentioned cooling mechanism, the effect of splashing the cooling oil is...

Claims

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Application Information

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IPC IPC(8): H02K9/20H02K9/06
CPCH02K9/16H02K9/10H02K9/19
Inventor 橘田佳明井上正哉
Owner MITSUBISHI ELECTRIC CORP
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