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Brush-containing motor

A technology with brushed motors and brushes, applied in circuits, current collectors, electromechanical devices, etc., can solve problems such as easy vibration and uncontrollable electromagnetic interference, achieve peak/burr elimination, reduce production costs, and uncontrollable electromagnetic interference. inhibiting effect

Inactive Publication Date: 2014-02-12
JOHNSON ELECTRIC SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such brushes are prone to vibration during sliding contact with the commutator. During the vibration process, the contact end of the brush is likely to make a secondary electrical contact with the commutator segment of the commutator (secondary commutation). resulting in uncontrollable electromagnetic interference

Method used

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Embodiment Construction

[0021] The technical solutions and other beneficial effects of the present invention will be apparent through the detailed description of specific embodiments of the present invention below in conjunction with the accompanying drawings. It can be understood that the drawings are provided for reference and illustration only, and are not intended to limit the present invention. The dimensions shown in the drawings are only for the convenience of clear description, and do not limit the proportional relationship.

[0022] see figure 1 , The brushed motor of the present invention includes a stator 1, a rotor 2 and a commutation device. One of the stator 1 and the rotor 2 is provided with a magnetic pole 3, and the other is provided with a commutator 10 and a winding 4 electrically connected to the commutator segments of the commutator. To sheet 12 (see figure 2 ) sliding contact to supply power to the winding, after the winding 4 is energized, the rotor of the motor rotates und...

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Abstract

The invention discloses a brush-containing motor which comprises a commutator and brush sheets. The commutator comprises a plurality of commutator segments distributed in the circumferential direction. The brush sheets are made of elastic conductive materials, and each brush sheet comprises a fixed end and a free end, wherein the fixed end is electrically connected to a direct-current power supply and the free end is in contact with the commutator segments of the commutator in a sliding mode. The free end of each brush sheet is provided with an electromagnetic interference suppression structure which can be an arc structure arranged at the free end of the corresponding brush sheet, and the arc structure is bent towards the direction away from the commutator. The motor further comprises a pure capacitor filter circuit, and the filter circuit comprises a plurality of grounding capacitors. At least two grounding capacitors are arranged between each brush sheet and the ground. Due to the fact that the electromagnetic interference suppression structures are adopted in the brush-containing motor, uncontrollable electromagnetic interference is effectively suppressed, and peaks / burrs in an electromagnetic interference waveform are obviously reduced / eliminated; no magnetic bead is adopted in the filter circuit so that the production cost can be greatly reduced.

Description

technical field [0001] The invention relates to a brushed motor, in particular to a brushed motor which can effectively suppress uncontrollable electromagnetic interference. Background technique [0002] A brushed motor is a rotating electrical machine that converts electrical energy into mechanical energy (motor) or mechanical energy into electrical energy (generator) with a built-in brush device. The brushed motor has the characteristics of fast start, timely braking, and relatively simple control circuit, so it is widely used. [0003] The brushed motor is composed of two parts, the stator and the rotor. The stator is usually equipped with magnetic poles (winding type or permanent magnet type) and brushes. The rotor is usually equipped with a commutator and windings electrically connected to the commutator segments of the commutator. It is electrically connected to the power supply and slides in contact with the commutator's commutator to supply power to the winding. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K23/66
CPCH01R39/54H02K11/026H02K11/02H02K11/028H02K13/006H02K11/01
Inventor 李童杰罗庆斌孙国伟陈莹钟慧婷
Owner JOHNSON ELECTRIC SHENZHEN