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Rotating electrical machine

A technology for rotating motors and rotors, which is applied in the direction of motors, electromechanical devices, electric vehicles, etc., and can solve problems such as the influence of rotor rotation efficiency and weight increase

Inactive Publication Date: 2020-07-07
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a possibility that the size of the rotating electrical machine in the axial direction will increase
[0010] In addition, the weight of the outer peripheral portion of the end plate (that is, the rotor) increases by protruding the outer peripheral portion of the end plate outward in the axial direction.
Therefore, it is considered that there will be an influence on the rotational efficiency of the rotor

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0053] figure 1 It is a sectional view showing a schematic configuration of the rotating electric machine 1 of the first embodiment.

[0054] figure 1 The rotating electric machine 1 shown is, for example, a running motor mounted in a vehicle such as a hybrid vehicle or an electric vehicle. However, the configuration of the present invention is not limited to running motors, but can also be applied to motors for power generation, motors for other purposes, and rotating electric machines (including generators) other than vehicles.

[0055] The rotating electrical machine 1 includes a housing 2, a stator 3, a rotor 4, and a cooling medium supply unit 5 (see figure 2 ). In the following description, the direction along the axis C of the shaft 31 described later may be simply referred to as the axial direction, the direction perpendicular to the axis C may be referred to as the radial direction, and the direction around the axis C may be referred to as the circumferential dire...

no. 2 approach

[0133] Figure 4 It is a cross-sectional view showing a main part of a rotating electrical machine 110 according to the second embodiment.

[0134] The rotating electric machine 110 has a first stepped portion (stepped portion) 112 formed on the outer peripheral surface 111 a of the first end plate 111 , and the other configurations are the same as those of the rotating electric machine 1 according to the first embodiment.

[0135] The first stepped portion 112 has a separation surface 113 and a bottom surface 114 . Like the first stepped portion 38 of the first embodiment, the first stepped portion 112 is formed as a concave portion having an L-shaped cross section by the separation surface 113 and the bottom surface 114 .

[0136] The bottom surface 114 is arranged at a position in the middle of the magnet end surface (end surface) 33 a facing the first side in the axial direction of the permanent magnet 33 in the radial direction. In this state, the inner surface 111b of ...

no. 3 approach

[0141] Figure 5 It is a cross-sectional view showing a main part of a rotating electrical machine 120 according to the third embodiment.

[0142] The rotating electric machine 120 has a first stepped portion (stepped portion) 122 formed on the outer peripheral surface 121 a of the first end plate 121 , and the other configurations are the same as those of the rotating electric machine 1 according to the first embodiment.

[0143] The first stepped portion 122 is formed in an annular shape on the outer peripheral surface 121 a of the first end plate 121 along the outer peripheral surface 121 a. The first stepped portion 122 has a first separation surface 123 , a second separation surface 124 and a bottom surface 125 .

[0144] The first separation surface 123 extends radially on the outside of the air gap 37 in the axial direction. The second separation surface 124 extends in the radial direction on the inner side (air gap 37 side) of the first separation surface 123 in the ...

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Abstract

The present invention provides a rotating electric machine capable of suppressing entry of a cooling medium into an air gap without swelling the outer peripheral portion of a rotor to the outside in the axial direction. The rotating electrical machine (1) of the present invention includes: a cylindrical stator (3) equipped with a coil (12); and a rotor (4) configured so as to be rotatable with respect to the stator (3) with an air gap (37) therebetween in the radial direction, wherein the outer side surfaces (34b, 35b) of the end panels (34, 35) are formed as flat surfaces orthogonal to the axial direction, and step sections (38, 39) extending in the radial direction are formed at positions separated from the outer side surfaces (34b, 35b) and the air gap (37) in the axial direction, on the outer peripheral surfaces (34c, 35c) of the end panels (34, 35).

Description

technical field [0001] The invention relates to a rotating electric machine. Background technique [0002] In a rotating electric machine, a magnetic field is formed in a stator core by supplying a current to a coil, and a magnetic attraction force and a magnetic repulsion force are generated between the permanent magnets of the rotor and the stator core. Accordingly, the rotor rotates about the rotation shaft relative to the stator. [0003] In the rotating electric machine described above, for example, during high-load operation, the rotor generates heat due to the influence of eddy currents generated in the magnets. When the magnetic force decreases due to heat generation of the magnet (so-called thermal demagnetization), the performance of the rotating electrical machine may decrease. [0004] As a method of cooling a rotating electric machine, there is known a method in which, for example, the cooling medium in the rotating shaft is guided to the inside of the rotor c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/32H02K1/27H02K9/19
CPCH02K1/32H02K1/278H02K9/19H02K2201/03Y02T10/64
Inventor 山口健太郎金田和弥藤田统阳
Owner HONDA MOTOR CO LTD
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