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Method for the production of a stator and stator produced according thereto

A manufacturing method and stator technology, applied in the manufacture of stator/rotor body, motor generator, magnetic circuit shape/style/structure, etc., can solve the problems of increasing the outer diameter of the motor, so as to improve the axial stiffness and fixation , the effect of reducing the risk of loosening

Inactive Publication Date: 2010-09-08
SEG AUTOMOTIVE GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The placement of these bolts on the outer circumference of the stator increases the outer diameter of the motor

Method used

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  • Method for the production of a stator and stator produced according thereto
  • Method for the production of a stator and stator produced according thereto
  • Method for the production of a stator and stator produced according thereto

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Embodiment Construction

[0039] Figures 1a, 1b and 1c show the basic method of manufacturing a stator core 20 of an electrical machine manufactured according to the so-called lamination method. First, a substantially rectangular or cuboid-shaped strip 21 is provided, which has notches 22 . Both sides of these notches 22 are delimited by teeth 24 or half teeth 25 , respectively. The individual teeth 24 or half-tooths 25 are connected to each other via a yoke 26 . The yoke 26 extends substantially in the circumferential direction p and in the radial direction r, moreover it generally has a material thickness s which corresponds to the thickness of the lamination 21 . The yoke 26 has a yoke back 32 facing away from the tooth 24 or half-tooth 25 . The back face 32 of the yoke is oriented opposite to the direction r. The teeth 24 and the half-tooths 25 extend substantially in the radial direction r and in the circumferential direction p. The teeth 24 and half teeth 25 also have a material thickness s. ...

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Abstract

Disclosed is a method for the production of a stator core (20)for an electric machine, wherein a substantially rectangular packet of lamellae (40) is initially formed from strip-shaped lamellae (21); said packet is transformed and curved into an annular shape in one of the subsequent steps, having an axial direction (a) corresponding to the cylinder axis (z), said annular shape comprising axial front surfaces (46). The annular packet of lamellae (40) is at least partially plastically deformed at points on the axial front surfaces (46) in an axial direction (a) in one of the subsequent steps. A stator for an electric machine, particularly a generator for motor vehicles, is also provided. Said stator consists of a stator iron in the form of curved, strip-shaped lamellae (21), comprising axial front surfaces (46). The axial length of the inner diameter of the stator iron is greater than that of the outer diameter.

Description

technical field [0001] The invention relates to a manufacturing method of a stator and a stator manufactured by the method. Background technique [0002] WO 01 / 54254 A1 discloses a method of manufacturing a stator for an electrical machine, in particular a generator for an automobile. For this purpose, an essentially cuboid-shaped sheet pack is first produced from strip-shaped sheets, which in a subsequent step is shaped into a ring shape by bending around a circular axis. The ring shape of the stator or stator core has two axial end faces. It has been established that a stator or stator core of this type, which is axially clamped between two end shields via the axial end faces, has greater axial elasticity and flexibility. This flexibility leads to loose fastening elements, such as bolts, which are used to clamp the stator between the endshields, or must be able to withstand high loads, which has an impact on the dimensions. The arrangement of these bolts on the outer ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/06H02K1/18H02K15/02H02K1/16
CPCH02K1/16H02K15/024Y10T29/49009
Inventor E·劳T·贝格尔M·亨内K·普夫吕格尔
Owner SEG AUTOMOTIVE GERMANY GMBH
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