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Dynamo-electric machine

A technology of rotating electrical machines and rotating grounds, applied in the direction of electromechanical devices, electrical components, electric components, etc., can solve problems that hinder high-efficiency equipment design, and achieve the effect of suppressing eddy currents

Active Publication Date: 2020-01-31
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, if eddy currents are likely to flow, it may become a major factor that hinders high-efficiency equipment design

Method used

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  • Dynamo-electric machine
  • Dynamo-electric machine
  • Dynamo-electric machine

Examples

Experimental program
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Embodiment Construction

[0053] Hereinafter, embodiment will be described based on drawings. The rotating electric machine in this embodiment is used, for example, as a vehicle power source. However, the rotating electric machine can be widely used for industrial use, vehicle use, home appliance use, OA equipment use, game machine use, and the like. In addition, in each of the following embodiments, parts that are the same or equivalent to each other are denoted by the same symbols in the drawings, and other descriptions are cited for the parts with the same symbols.

[0054] The rotary electric machine 10 of this embodiment is an inner rotor type (inner rotation type) polyphase AC motor, and its outline is as follows: figure 1 shown. figure 1 It is a vertical cross-sectional view of the rotary electric machine 10 in a direction along the rotary shaft 11 . In the following description, the direction in which the rotating shaft 11 extends is defined as the axial direction, the direction extending ra...

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Abstract

A dynamo-electric machine comprises a rotor that is supported to rotate freely, and a stator core (21) placed coaxially with the rotor. The stator core is configured by laminating a plurality of steelplates (32), and has a ring-shaped yoke part (35), a plurality of teeth (34) extending from the yoke part in the radial direction, and a slot (37) provided between adjacent teeth. A stator winding iswound in the slot. The yoke part has a hole (43) extending in the lamination direction of the steel plates at a position for which the slot is extended in the radial direction, and in that hole interior, a powder compact (42) comprising a magnetic powder is provided.

Description

[0001] References to related applications [0002] This application is based on Japanese Patent Application No. 2017-111727 filed on June 6, 2017, and the content of the description is incorporated herein. technical field [0003] The invention relates to a rotating electric machine. Background technique [0004] In a rotating electric machine, a stator core is generally formed by laminating a plurality of electromagnetic steel sheets made of a soft magnetic material. As a method of fixing laminated electrical steel sheets, methods of welding in the lamination direction and press-fitting by concave-convex riveting are known. Originally, the purpose of laminating electromagnetic steel sheets to form a stator core is to increase the resistance of the stator core by electrically dividing it in the direction of plate thickness so as to increase the resistance of the stator core. The fluctuation of the stray magnetic flux in the direction perpendicular to the passing direction ...

Claims

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Application Information

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IPC IPC(8): H02K1/02H02K1/06H02K1/18
CPCH02K1/02H02K1/16H02K2213/03H02K1/148H02K1/165
Inventor 谷口真福岛明松原贤土井智史
Owner DENSO CORP