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Method for applying an electrical insulation

An electrical insulating layer and coating technology, which is applied in the field of spraying on ferromagnetic objects and spraying electrical insulating layers on ferromagnetic objects, can solve the problem of insufficient fixation of the armature body, high equipment cost, downtime, and considerable time spent and other problems, to achieve the effect of saving auxiliary stations, reliable tank insulation, and easy maintenance

Inactive Publication Date: 2006-08-30
ROBERT BOSCH GMBH
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Problems solved by technology

[0005] Although this method can coat a thin insulating layer of about 50 to 100 microns in the axial slot with good thermal and electrical conductivity, it also has some major disadvantages in terms of cost: for example, the powder pool requires the armature body Horizontal position, while the armature body is usually processed vertically in the subsequent processing process, so in the subsequent process, the armature body must be transported many times; in addition, conveying the armature body through the powder pool requires very complicated transportation system; in the event of damage to the powder tank, the replacement of the powder tank integrated in the complete plant takes considerable time; resulting in costly downtimes of the plant; the mask also takes care of securing the armature body during transport function, when the mask is worn, it may occur that the armature body is not sufficiently secured, jeopardizing the process flow and causing downtime

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  • Method for applying an electrical insulation
  • Method for applying an electrical insulation

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Embodiment Construction

[0017] The application of an electrically insulating layer on a ferromagnetic body of a motor main part, namely a stator or rotor, with axial slots for mounting the armature winding is illustrated by means of a slotted armature body 10 of the armature of a DC motor. method. figure 2 The armature body 10 , shown in end view, consists of several molded laminations 11 , which are arranged axially one behind the other to form a so-called laminated core and are fixedly connected to one another in the axial direction. When the lamination group is not formed, the armature body 10 can also be made into a solid cylinder with a soft magnetic composite material. Armature body 10 is provided with a number of axial slots 14 equidistant over its entire circumference in a known manner for mounting armature windings.

[0018] The armature body 10 press-fitted on the armature shaft 13 is "pre-cleaned" in the first process 21 ( image 3 ) to remove machining residues such as flushing chips an...

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Abstract

The invention relates to a method for applying an electrical insulation to a ferromagnetic body of a main element of an electrical machine, particularly to a slotted armature body of an armature of a DC motor, said ferromagnetic body being provided with axial slots for accommodating an electrical winding, during which the body is coated with an electrostatically charged plastic powder. In order to improve the cost-efficiency of the method with regard to low initial costs and high maintainability while ensuring a reliable slot insulation, the coating with a large layer thickness is carried out by direct powder spraying onto the grounded body.

Description

Background technique [0001] The invention relates to a method for spraying an electrically insulating layer on a ferromagnetic body of the main part of an electrical machine with axial slots for mounting electrical windings according to the preamble of claim 1, in particular on the armature of a DC motor A method of spraying an electrically insulating layer on a slotted armature body. [0002] Such as figure 2 As shown, the slotted armature body of the DC motor armature is composed of several formed punching sheets 11, and these punching sheets are connected one by one in the axial direction to form a stack of laminations. The armature body 10 is press-fitted on an armature shaft 13 . The armature body 10 has axial slots 14 which are open towards both end faces of the cylindrical armature body 10 and enter the cylindrical surface of the armature body 10 with a notch 141 . An armature winding in the form of coils is wound into these axial slots 14 . The coil is wound from a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/12B05D1/06
CPCH02K15/12B05D1/06H02K3/38
Inventor A·霍伊萨姆
Owner ROBERT BOSCH GMBH
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