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

A manufacturing method and technology of motor stator, which are applied in the manufacture of stator/rotor body, motor generator, magnetic circuit shape/style/structure, etc., can solve problems such as increasing the outer diameter of the motor, and achieve different degrees of clamping reduction. , Accurately determine and improve the effect of fixation
CN1902801AInactive Publication Date: 2007-01-24SEG AUTOMOTIVE GERMANY GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEG AUTOMOTIVE GERMANY GMBH
Publication Date
2007-01-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for manufacturing a stator core (20) of an electric motor, wherein first a substantially rectangular parallelepiped-shaped sheet group (40) is formed from strip-shaped sheets (21), and the sheet group is wound around a circular shaft core in a subsequent step. The roll is deformed into an annular shape having an axial direction (a) corresponding to the cylinder axis (z), wherein the annular shape has an axial end face (46). In this case, in a further subsequent step, the annular lamella group ( 40 ) is plastically deformed in the axial direction (a) at least partially on the axial end face ( 46 ). The stator of an electric machine, in particular an automobile generator, comprises a stator core composed of strip-shaped sheets (21) wound around a circular shaft core, the stator core having axial end faces (46). The stator core is plastically deformed in the axial direction (a) on the end face (46). The stator of an electric machine, in particular an automobile generator, comprises a stator core composed of strip-shaped sheets (21) wound around a circular shaft core, the stator core having axial end faces (46). The axial length of the stator core on its inner diameter is greater than the axial length on its outer diameter.
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Description

technical field

[0001] The invention relates to a method of manufacturing a stator according to the preambles of the independent claims and to a stator manufactured by this 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 di...

Claims

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