CN-224218231-U - Long-life high-voltage direct-current motor for improving EMI

CN224218231UCN 224218231 UCN224218231 UCN 224218231UCN-224218231-U

Abstract

The application discloses a long-life high-voltage direct current motor for improving EMI, which is characterized by comprising a motor body, wherein an end cover is arranged at the tail end of the motor body, carbon brushes extending out of the end cover are respectively arranged in two opposite sides of the end cover, a brush holder assembly is arranged at the outer side of each carbon brush, an insulating cover is further arranged at the outer side of one end of each brush holder assembly exposed out of the end cover, an electromagnetic shielding cover is arranged at the outer side of each insulating cover, the electromagnetic shielding cover is arranged in the method, electromagnetic waves generated in the working process of the motor are effectively prevented from interfering other electronic devices, the EMI inhibition effect of the motor is obviously improved, the electromagnetic shielding cover is prevented from being electrically connected with the brush holder assembly through the insulating covers, the use safety is ensured, the heat dissipation performance is improved through heat dissipation fins, and the service life of the motor is prolonged.

Inventors

Pan Yaodian
LIU HANZHONG

Assignees

深圳乘方电机有限公司

Dates

Publication Date: 20260508
Application Date: 20250421

Claims (6)

1. The long-life high-voltage direct current motor for improving the EMI is characterized by comprising a motor body, wherein an end cover is arranged at the tail end of the motor body, carbon brushes extending out of the end cover are respectively arranged in two opposite sides of the end cover, brush holder assemblies are arranged on the outer sides of the carbon brushes, insulating covers are further arranged on the outer sides of one ends of the brush holder assemblies exposed out of the end cover, and electromagnetic shielding covers are arranged on the outer sides of the insulating covers.
2. The long life high voltage direct current electric machine of claim 1 wherein said electromagnetic shield is internally deposited with an electromagnetic absorbing thermally conductive layer.
3. The long life high voltage direct current motor for improving EMI of claim 2 wherein said electromagnetic absorbing thermally conductive layer is a gradient layer structure having a thickness of 50-200 μm.
4. The long life high voltage direct current motor for improving EMI as recited in claim 1 or 2, wherein said electromagnetic shield is provided with heat sink fins on the outside thereof.
5. The long life high voltage dc motor with improved EMI as recited in claim 4, wherein said heat fins have a gradual height profile.
6. The long life high voltage dc motor with improved EMI as recited in claim 4, wherein said array of heat fins has micro grooves on its surface.

Description

Long-life high-voltage direct-current motor for improving EMI Technical Field The utility model relates to the technical field of direct current motors, in particular to a long-life high-voltage direct current motor for improving EMI. Background 110V-240V alternating current is generally adopted for the motor for the floor brush to work, the alternating current is generally rectified into direct current to serve as a motor power supply in a rectifying mode, the motor is poor in general heat dissipation condition, high in power and high in temperature rise, the motor works in a high-temperature state for a long time, the service life is greatly shortened, customers are more and more long in service life of products, electromagnetic compatibility requirements are met, and how to improve the service life of the motor and meet the EMI requirements is a great challenge for motor design. The existing solution is to adopt a carbon brush with a brush braid to meet high power requirements, design a longer carbon brush to improve the service life of the motor, and simultaneously add a multistage filter circuit inside and outside the motor to improve the EMI of the motor, but the lengthened carbon brush can extend out of the machine shell together with the brush holder, so that an interference signal generated by the motor can radiate electromagnetic waves outwards more easily through the exposed metal brush holder, and great difficulty is caused to improve the EMI of the motor. Accordingly, there is a need to design a long-life high voltage dc motor that improves EMI to address one or more of the deficiencies in the prior art. Disclosure of Invention The technical scheme is that the long-life high-voltage direct-current motor for improving the EMI is characterized by comprising a motor body, wherein an end cover is arranged at the tail end of the motor body, carbon brushes extending out of the end cover are respectively arranged in two opposite sides of the end cover, brush holder assemblies are arranged on the outer sides of the carbon brushes, insulating covers are further arranged on the outer sides of one ends of the brush holder assemblies exposed out of the end cover, and electromagnetic shielding covers are arranged on the outer sides of the insulating covers. In a preferred embodiment, an electromagnetic absorbing heat conducting layer is deposited on the inside of the electromagnetic shield. In a preferred embodiment, the electromagnetic absorption heat-conducting layer is in a gradient layer structure and has a thickness of 50-200 μm. In a preferred embodiment, the electromagnetic shield is provided with heat sink fins on the outside. In a preferred embodiment, the heights of the heat dissipation fins are distributed gradually. In a preferred embodiment, the surface array of the heat sink fins is provided with micro grooves. The electromagnetic shielding cover has the beneficial effects that electromagnetic waves generated in the working process of the motor are effectively prevented from interfering other electronic devices through the arrangement of the electromagnetic shielding cover, the EMI inhibition effect of the motor is obviously improved, the electromagnetic shielding cover is prevented from being electrically connected with the brush holder assembly through the insulating cover, the use safety is ensured, meanwhile, the heat dissipation performance is improved through the heat dissipation fins, and the service life of the motor is prolonged. Drawings FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a schematic view of the structure of the end cap of the present utility model; fig. 3 is a schematic structural view of the electromagnetic shielding case of the present utility model. In the figure: 10. The motor comprises a motor body, 11, an end cover, 12, a brush holder assembly, 13, an insulating cover, 14, an electromagnetic shielding cover, 15, an electromagnetic absorption heat conduction layer, 16, heat dissipation fins, 17 and a micro groove. Detailed Description In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below. In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled" and "mounted" should be construed broadly, and for example, "coupled" may be either detachably or non-detachably, and may be