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Commutation device and electric machine

A commutation device and commutator technology, applied in the direction of circuits, current collectors, electrical components, etc., can solve problems such as short circuit, shortened service life of motors, deposition, etc., and achieve the effects of increasing service life, avoiding deposition, and avoiding electrical short circuits

Inactive Publication Date: 2010-08-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seen in the direction of rotation of the commutator, this wear debris deposits in front of the brush elements, which leads to pre-commutation and thus to a shortened service life of motors equipped with such a commutation device
In addition, the resulting wear debris deposits in the air gap or insulation gap between two circumferentially adjacent laminae in each case, which can lead to short circuits

Method used

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  • Commutation device and electric machine
  • Commutation device and electric machine
  • Commutation device and electric machine

Examples

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Embodiment Construction

[0025] In the figures, the same components and components with the same function are marked with the same reference numerals.

[0026] exist figure 1 A commutation device 1 for an electric motor is shown in . The commutation device 1 comprises a commutator 2 which is arranged in a non-rotatable manner on a not shown armature shaft standing perpendicularly on the plane of the drawing. In the exemplary embodiment shown, the commutator 2 comprises four copper laminations 3 , 4 , 5 , 6 arranged next to each other in the circumferential direction. The laminations 3 , 4 , 5 , 6 are electrically conductively connected to an armature winding (not shown) of the armature lamination stack. An air gap 7 , 8 , 9 , 10 extending in the axial direction is provided between every two adjacent lamellae in order to keep the lamellae 3 , 4 , 5 , 6 electrically insulated from one another.

[0027] The commutator 2 is arranged inside a brush element carrier 11 which in this embodiment has four slee...

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PUM

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Abstract

The invention relates to a commutation device (1) having a rotatable commutator (2) and at least one grinding element (16, 17, 18, 19) contacting the commutator (2). According to the invention, mechanism (21) for removing abrasion debris (20) occurring during commutation are provided. The invention further relates to an electric machine having a commutation device (1) of said kind. The mechanism includes at least one non-conductive spring (22, 23, 24, 25) clung onto the commutator (2). The spring designed as a plate spring is fixed onto a holder for the grinding elements by means of the end portion of the spring facing away from the commutator and is clung onto the commutator by means of the free end portion of the spring.

Description

technical field [0001] The invention relates to a commutation device according to the preamble of claim 1 and to an electric machine, in particular an electric motor or a generator, according to claim 16 . Background technique [0002] In electrotechnical terms, a device for commutating the current in an electric motor is called a commutation device. Current commutation produces a rotating or migrating current relative to the armature winding. The known commutation device comprises a commutator located non-rotatably on an armature shaft, which commutator has a plurality of lamellae arranged side by side in the circumferential direction and electrically insulated from each other, said lamellae being connected to at least two electrical The brush elements are in electrical contact. Wear debris, usually carbon dust, is produced by the constant friction between the stationary brush elements and the rotationally driven commutator. Seen in the direction of rotation of the commu...

Claims

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Application Information

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IPC IPC(8): H01R39/38
CPCH01R39/38H01R39/045
Inventor D·克卢姆普E·辛尔A·西巴克
Owner ROBERT BOSCH GMBH
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