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Stator for an electrical machine

A stator and stator technology, which is applied in the field of stators of general electric motors, can solve the problems of high cost of manufacturing technology, and achieve the effects of low material cost, favorable cost and simple cost.

Inactive Publication Date: 2009-09-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inserting the additional profiled part into the groove involves relatively high costs in terms of production technology and is therefore not a satisfactory solution to the problem

Method used

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  • Stator for an electrical machine
  • Stator for an electrical machine
  • Stator for an electrical machine

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Experimental program
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Embodiment Construction

[0022] in figure 1 The stator core 20 of the stator 100 according to the present invention of a two-stage motor, particularly a general-purpose motor, is shown in cross section. The stator core 20 includes a stator yoke 22 which forms a magnetic yoke. Two pole shoes 21 are arranged on the stator yoke 22 directed radially inward. The pole shoes 21 are arranged directly opposite to each other. Slots 24 are formed between the pole shoe 21 and the stator yoke 22, and these slots are used to receive the stator winding 30. The stator core 20 includes a set of laminated sheets of the same pattern that are arranged axially with each other.

[0023] The stator 100 also includes a stator winding 30 which is composed of at least two coil windings 31 for a two-stage motor. Here, each pole shoe 21 receives at least one coil winding 31. One coil winding 31 is made of one winding wire having a plurality of turns. The winding wire is wound into a substantially rectangular coil winding 31. In ord...

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PUM

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Abstract

The invention describes a stator for an electrical machine, in particular a universal motor, comprising a stator core (20) with a stator yoke (22) and at least two pole shoes (21), which are arranged radially on the stator yoke (22), and a stator winding (30) with at least two coil windings (31), wherein each pole shoe (21) accommodates at least one coil winding (31), characterized in that the coil windings (31) are connected cohesively to the stator core (20) by means of an adhesive.

Description

Technical field [0001] The present invention relates to a stator for electric motors, especially for general-purpose electric motors, according to the preamble of claim 1. Background technique [0002] It is known and described for example in EP 1 530 280 A2 that the coil windings of the stator winding are embedded in slots of the stator. Here, the coil winding is wound around the pole shoe as closely as possible. Through the specific shape of the pole piece, the coil winding forms an undercut in the slot, so that a certain mechanical strength is achieved between the coil winding and the stator core. For damage-free operation of the motor, it is absolutely necessary for the coil to be firmly seated in the slot. [0003] If a motor with this type of stator is subjected to strong vibration, it is indicated during the operation of the motor that the placement of the coil windings in the slots is not strong enough. This is particularly observed in the motors of electric power tools, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/52
CPCH02K15/12H02K3/522
Inventor W·里克尔M·拉德
Owner ROBERT BOSCH GMBH