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Rotating motor and rotor shaft

A technology for rotating electrical machines and rotor shafts, applied in the field of rotating electrical machines and their rotor shafts, can solve the problems of increasing internal fan pressure and capacity, increasing mechanical losses of rotating electrical machines, etc., and achieve the effect of effective cooling

Active Publication Date: 2020-09-29
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to increase the pressure and capacity of the inner fan, and there is a problem that the mechanical loss of the rotating electrical machine increases.

Method used

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  • Rotating motor and rotor shaft
  • Rotating motor and rotor shaft
  • Rotating motor and rotor shaft

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0027] figure 1 It is a vertical cross-sectional view of the rotating electric machine according to the first embodiment. The rotary electric machine 201 has a rotor 10 , a stator 20 , two bearings 35 , a frame 110 , and two bearing brackets 115 , 116 .

[0028] The rotor 10 has a rotor shaft 11 extending in the direction of the rotation axis, and a rotor core 12 attached to the radially outer side of the rotor shaft 11 . The rotor shaft 11 is rotatably supported by bearings 35 on both sides in the axial direction across the rotor core 12 .

[0029] At one end of the rotor shaft 11, a coupling portion 11z for coupling with a coupling partner is provided. Hereinafter, in the rotary electric machine 201 , the direction of the coupling portion 11 z is referred to as a coupling side, and the opposite direction is referred to as an opposite coupling side. A fan 118 is attached to the rotor shaft 11 between the rotor core 12 and the bearing 35 on the opposite side.

[0030] The ...

no. 2 approach

[0058] Figure 9 It is a vertical cross-sectional view of the rotating electric machine according to the second embodiment. This second embodiment is a modification of the first embodiment. The rotating electric machine 202 according to the second embodiment does not have the fan 118 in the rotating electric machine 201 according to the first embodiment. In the rotating electrical machine 202 according to the second embodiment, the two bearings 35 are arranged in the frame 120 . Therefore, the coupling-side bearing bracket (first bearing bracket) 121 and the coupling-side bearing bracket (second bearing bracket) 122 are mounted on the stator 20 so as to partition the inside of the frame 120 in the axial direction. frame 120. Inlet ventilation holes 121 a are formed in the bearing bracket (first bearing bracket) 121 on the side opposite to the coupling. In addition, an outlet ventilation hole 122 a is formed in the coupling-side bearing bracket (second bearing bracket) 122 ...

no. 3 approach

[0067] Figure 10 It is a vertical cross-sectional view of the rotating electric machine according to the third embodiment. This third embodiment is a modification of the first embodiment. In the rotating electrical machine 203 according to the third embodiment, at least one in-frame flow path 131 is formed in the frame 130 . The in-frame channel 131 has a cross-section in a region sandwiched between the inner surface and the outer surface of the frame 130 and extends in the axial direction. The end portion of the in-frame flow path 131 on the coupling-side bearing bracket (second bearing bracket) 136 side communicates with the inner space 114 a of the frame 130 via a flow path inlet 131 a. In addition, the end portion of the in-frame flow path 131 on the opposite side to the bearing bracket (first bearing bracket) 135 communicates with the inner space 114b of the frame 130 via the flow path inlet 131b.

[0068]No opening communicating with the outside is formed in the coup...

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PUM

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Abstract

The invention relates to a rotating motor and a rotor shaft. Cooling of a stator winding of the rotating motor is effectively performed. The rotating motor (201) is provided with components of a rotor(10) which has a rotor shaft (11) and a rotor core (12); a stator (20) which has a stator core (21) and a stator winding (22); two bearings (35); a frame (110); a first bearing bracket (115); and a second bearing bracket (116). The rotor shaft (11) is provided with a bypass flow path. The bypass flow path is connected with an upstream space (113b) of the rotor core (12) and the stator core (21) of the flow path of the air for cooling, and a downstream space (113b) which is separated from the rotor core (12) and the stator core (21) and is at the opposite side of the upstream space (113b).

Description

technical field [0001] This invention relates to rotating electric machines and their rotor shafts. Background technique [0002] A rotating electric machine usually has a rotor and a stator. A rotor generally has a rotor shaft that rotates around a rotation axis, and a rotor core mounted on the radially outer side of the rotor shaft. In addition, the stator has a cylindrical stator core and a stator coil penetrating through the stator core. During load operation, the copper loss caused by the stator coil and the iron loss caused by the stator core are often the main heat sources. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 11-4554 [0004] The stator coils are in mechanical contact or bonded to more components, but need to maintain electrical insulation. Therefore, more insulating materials are used for the stator coil and its surrounding components. Insulating materials have limitations in heat resistance performance depending on their materi...

Claims

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Application Information

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IPC IPC(8): H02K1/32H02K7/00H02K9/06H02K9/10H02K9/16
CPCH02K1/32H02K7/003H02K9/06H02K9/10H02K9/16
Inventor 栗田聪坪井雄一
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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