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Rotor of rotating electrical machine for vehicle

A technology for rotating electric machines and vehicles, which is applied in the direction of electromechanical devices, electrical components, electric components, etc., and can solve problems such as unfavorable cost, doubtful reliability of electromagnetic steel sheets, and increased stress

Pending Publication Date: 2021-08-13
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the stress acting on the magnetic steel sheet arranged at the axial end of the rotor shaft increases in the assembled state, the rotor core is arranged in the The reliability of the electromagnetic steel plate at the axial end of the rotor shaft is doubtful
In addition, using a high-strength electrical steel sheet in the axial center of the rotor shaft increases the amount of high-strength electrical steel sheet used, which is disadvantageous in terms of cost.

Method used

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  • Rotor of rotating electrical machine for vehicle
  • Rotor of rotating electrical machine for vehicle
  • Rotor of rotating electrical machine for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 It is a cross-sectional view showing part of a vehicle drive device 10 (hereinafter referred to as drive device 10 ) arranged in a vehicle to which the present invention is applied. The drive device 10 is arranged, for example, in an electric vehicle or a hybrid vehicle. The drive device 10 includes a vehicle rotating electrical machine MG (hereinafter referred to as rotating electrical machine MG) functioning as a driving force source of the vehicle in a housing 12 that is a non-rotating member.

[0037] A motor chamber 18 partitioned by a partition wall 16 is formed in the casing 12, and the rotary electric machine MG is housed in the motor chamber 18. As shown in FIG. The rotary electric machine MG is arranged to be rotatable about the rotation axis C1. The rotary electric machine MG includes: a cylindrical stator 22 fixed to the housing 12 in a non-rotatable manner; a cylindrical rotor core 24 disposed on the inner peripheral side of the stator 22; and a ...

Embodiment 2

[0062] Figure 6 It is a sectional view of the rotor core 80 and the rotor shaft 26 corresponding to another embodiment of the present invention. A rotor core 80 is integrally fitted on the outer peripheral surface of the rotor shaft 26 , thereby constituting the rotor 78 . In the present embodiment, the rotor core 80 is constituted by three blocks of a first block 82a, a second block 82b, and a third block 82c. The first block 82a is configured by stacking a plurality of first electromagnetic steel sheets 84a. The second block body 82b is configured by stacking a plurality of second electromagnetic steel sheets 84b. The third block body 82c is configured by stacking a plurality of third electromagnetic steel sheets 84c. In other words, the electromagnetic steel sheet 84 is composed of three types of first to third electromagnetic steel sheets 84 a to 84 c including different materials. Here, it is designed that the strength of the second electromagnetic steel sheet 84b is...

Embodiment 3

[0070] In the above-described embodiments, the strengths of the electrical steel sheets are varied by varying the materials constituting the electrical steel sheets, but in this embodiment, the strengths of the electrical steel sheets are varied by changing the thickness of the electrical steel sheets. Specifically, the electromagnetic steel sheet 108 constituting the rotor core 102 of this embodiment is composed of a first electromagnetic steel sheet 108 a and a second electromagnetic steel sheet 108 b having different thicknesses.

[0071] Figure 7 It is a sectional view of the rotor shaft 26 and the rotor core 102 corresponding to another embodiment of the present invention. A rotor core 102 is integrally fitted on the outer peripheral surface of the rotor shaft 26 . In this embodiment, the rotor core 102 is also embedded in the rotor shaft 26 in an interference fit state. The rotor 100 is constituted by the rotor shaft 26 and the rotor core 102 fitted on the outer perip...

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PUM

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Abstract

A rotor of a rotating electrical machine for a vehicle according to the present invention comprises: a rotor shaft; and a rotor core having a plurality of electromagnetic steel sheets embedded into the outer peripheral surface of the rotor shaft in an interference fit state or a transition fit state. In the rotor core, the strength of the electromagnetic steel sheet disposed at at least one end portion in the axial direction of the rotor shaft is set to be higher than the strength of the electromagnetic steel sheet disposed at the central portion in the axial direction of the rotor shaft.

Description

technical field [0001] The present invention relates to a structure of a rotor of a rotating electrical machine for a vehicle. Background technique [0002] A rotor for a rotating electrical machine for a vehicle, which is constructed by fitting a rotor core made of a plurality of electromagnetic steel sheets to a rotor shaft, is widely known. For example, the rotor (rotating member) of the rotating electric machine disclosed in JP 2014-36471 is exactly the case. Japanese Patent Application Laid-Open No. 2014-36471 describes that the strength of the magnetic steel sheet disposed at the axial center of the rotor shaft among the magnetic steel sheets shrink-fitted on the rotor shaft is higher than that at the end portions of the rotor shaft in the axial direction. The strength of the electromagnetic steel plate is high. [0003] However, since the stress acting on the magnetic steel sheet arranged at the axial end of the rotor shaft increases in the assembled state, the roto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/28H02K1/27
CPCH02K1/28H02K1/274H02K1/02H02K1/2766H02K2213/12
Inventor 村上幸范山岸义忠
Owner TOYOTA JIDOSHA KK