CN219696879U - High electromagnetic compatibility carbon brush assembly - Google Patents
High electromagnetic compatibility carbon brush assembly Download PDFInfo
- Publication number
- CN219696879U CN219696879U CN202321166482.9U CN202321166482U CN219696879U CN 219696879 U CN219696879 U CN 219696879U CN 202321166482 U CN202321166482 U CN 202321166482U CN 219696879 U CN219696879 U CN 219696879U
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- Prior art keywords
- capacitor
- carbon brush
- brush
- electromagnetic compatibility
- high electromagnetic
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 71
- 239000003990 capacitor Substances 0.000 claims abstract description 82
- 239000011324 bead Substances 0.000 claims abstract description 17
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
The utility model relates to a carbon brush assembly with high electromagnetic compatibility, which comprises a carbon brush mounting plate, a brush holder, a carbon brush, a filtering device and a lead wire, wherein a rotating shaft through hole is formed in the center of the carbon brush mounting plate, the brush holder is oppositely arranged on the carbon brush mounting plate by taking the rotating shaft through hole as the center, a carbon brush outlet hole is formed in one end, close to the rotating shaft through hole, of the brush holder, a brush wire is led out of the carbon brush, and the filtering device comprises an inductor, a first capacitor and a second capacitor and is characterized in that: the first capacitor or the second capacitor is electrically connected with the lead wire and the inductor, the first capacitor and the second capacitor are provided with grounding ends, and the grounding ends are provided with magnetic beads. Through setting up the earth terminal in the circuit, strengthen anti-electromagnetic interference ability, reduce the requirement to filter equipment, set up the magnetic bead and can absorb high frequency noise and peak interference better at the earth terminal, use nonpolar filter capacitor to connect first electric capacity and second electric capacity, simplify the circuit again when reinforcing electromagnetic compatibility, this high electromagnetic compatibility carbon brush subassembly simple structure, anti-electromagnetic interference ability are stronger, noise reduction performance is better.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a carbon brush assembly with high electromagnetic compatibility.
Background
The basic meaning of electromagnetic compatibility (EMC) is to ensure that the electronic devices execute the coexistence state of the respective functions in a common electromagnetic environment without interfering with each other, so as to improve the electromagnetic compatibility of the electronic products, namely to try to inhibit or eliminate electromagnetic interference, improve the working stability and reliability of the electronic products in the electromagnetic environment, namely to enhance the noise reduction effect, and try to enhance the filtering function, so that the electromagnetic interference resistance is also improved.
The brush is a device for transmitting energy or signals between a rotating part and a stationary part of a generator or other rotating machinery, and is widely used as a sliding contact piece in many devices, and is made of graphite, so the brush is also called a carbon brush, and is assembled on a steering gear or a slip ring, when a motor rotates, the carbon brush is in friction contact with the steering gear to transmit electric energy to a coil through the steering gear, and noise can be generated in the process due to electromagnetic interference and insufficient electromagnetic compatibility of the device.
The utility model of patent application number 201520261999.5 provides an EMC carbon brush assembly, which comprises brush plates, annular brush holders uniformly distributed at four corners of the brush plates, brushes and springs arranged in the brush holders, conductive sheets embedded in the brush plates and formed into an integrated structure with the brush plates in an injection molding mode, capacitors arranged at the end parts of the two conductive sheets, inductors connected with the end parts of the conductive sheets, leads connected with the end parts of the conductive sheets and coils sleeved on the leads, wherein the middle of each conductive sheet is disconnected into two ends, the disconnection parts are connected through the inductors, and the inductors are arranged on an inductor installation area of the brush plates and are fixed in a buckle mode.
The utility model improves the EMC capability of the common carbon brush assembly, so that the motor has anti-interference capability, improves the connection mode of the brush plate and the conductive sheet, ensures the stability and improves the connection reliability, but aiming at the noise reduction effect of the utility model, the anti-electromagnetic interference capability of the circuit is to be enhanced.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the high-electromagnetic compatibility carbon brush assembly with stronger electromagnetic interference resistance and better noise reduction effect for the circuit aiming at the defects in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a high electromagnetic compatibility carbon brush subassembly, including carbon brush mounting panel, brush holder, carbon brush, filter equipment and lead wire, the pivot through-hole has been seted up to the central point of carbon brush mounting panel, the brush holder with the pivot through-hole is relative to be set up on the carbon brush mounting panel as the center, just the one end that the brush holder is close to the pivot through-hole is equipped with the carbon brush and goes out the hole, there is the brush line to draw forth on the carbon brush, filter equipment is including inductance, first electric capacity and second electric capacity, its characterized in that: the first capacitor or the second capacitor is fixedly connected with the lead wire and the inductor, the first capacitor and the second capacitor are provided with grounding ends, the grounding ends are provided with magnetic beads, and the brush wire is connected with one end of the inductor.
By adopting the technical scheme, the first capacitor or the second capacitor is electrically connected with the lead wire and the inductor, and in the process that current flows into the carbon brush from the lead wire, the first capacitor or the second capacitor can absorb part of alternating current components, and then the alternating current components are discharged from the grounding end; when the circuit is designed in electromagnetic compatibility, the good grounding design can eliminate various noises, reduce the electromagnetic interference effect and reduce the requirements on a filter device; the magnetic beads have excellent electromagnetic interference inhibition performance, and can keep higher impedance in a wider frequency range, so that the filtering efficiency is improved, and the noise reduction effect is enhanced; a filter can be used for playing a similar role as the magnetic beads, but the filter is too large and not as small as the magnetic beads, and a capacitor can be added on the carbon brush assembly, but the capacitor can not be qualified, and the higher the frequency of the capacitor is, the smaller the capacity is, so that the magnetic beads are preferably used for absorbing the ultrahigh frequency capacitor signals and suppressing noise; the magnetic beads can be arranged on the inductor, the capacitor or other elements, but the magnetic beads are arranged close to the grounding end, so that the filtering effect of the magnetic beads can be better exerted, and the filtering effect of absorbing high-frequency noise and peak interference can be better exerted; in the embodiment, the first capacitor and the second capacitor are preferably monolithic capacitors, and the monolithic capacitors have the advantages of excellent high-frequency tradition, corresponding stability in frequency and small size; the ac component absorbed by the filter means in the whole circuit is eventually removed from the ground.
The above-mentioned high electromagnetic compatibility carbon brush subassembly can further set up to: the filter device further comprises a nonpolar filter capacitor, and the first capacitor is connected with the second capacitor through the nonpolar filter capacitor.
By adopting the technical scheme, the asexual electrode filter capacitor is arranged in the rectifying circuit, the asexual electrode filter capacitor is used for connecting the first capacitor and the second capacitor, the circuit structure is simplified, and meanwhile, the electromagnetic interference resistance is enhanced, as shown in a current path: the current flows in from the positive electrode, sequentially passes through the second capacitor, the nonpolar filter capacitor and the first capacitor to reach the inductor, then is transmitted to the carbon brush through the brush wire by the inductor, the carbon brush rubs with the steering gear to transmit electric energy, the current flows into the coil through the steering gear, then the current is transmitted to the other inductor through the brush wire by the carbon brush on the other side, and then sequentially passes through the first capacitor, the nonpolar filter capacitor and the second capacitor to finally flow out from the lead wire; in the whole current flow path, the first capacitor, the second capacitor, the inductor, the nonpolar filter capacitor and the magnetic beads arranged at the grounding end absorb alternating current components, and finally the alternating current components flow out from the grounding end.
The above-mentioned high electromagnetic compatibility carbon brush subassembly can further set up to: the brush wire is connected with the inductor towards a direction away from the first capacitor or the second capacitor.
By adopting the technical scheme, the brush wires are connected with the inductor towards the same direction, so that a complete circulating circuit can be formed, and alternating current components in the current can be successfully absorbed or filtered.
The above-mentioned high electromagnetic compatibility carbon brush subassembly can further set up to: the first capacitor or the second capacitor is riveted with the lead wire through welding or hot melting, and the inductor is formed by the first capacitor and the second capacitor.
By adopting the technical scheme, the welding or hot-melt riveting can prevent corrosion and ensure the conductivity.
The above-mentioned high electromagnetic compatibility carbon brush subassembly can further set up to: the carbon brush mounting plate is provided with an inductance support frame, the inductance support frame is positioned on two sides of the brush holder, and the inductance is arranged above the carbon brush through the inductance support frame.
By adopting the technical scheme, the inductor support frame plays a role in fixing or stabilizing the inductor, and the inductor is arranged above the brush holder through the inductor support frame, so that the circuit in the embodiment of the utility model is realized, and the space is fully utilized and the volume of the carbon brush assembly is reduced by simplifying the circuit and reasonably distributing circuit elements.
The above-mentioned high electromagnetic compatibility carbon brush subassembly can further set up to: the grounding end penetrates through the carbon brush mounting plate.
By adopting the technical scheme, the grounding end passes through the carbon brush mounting plate, so that when the carbon brush assembly is not used, the grounding end can be conveniently fixed by bending the grounding end, the magnetic beads are prevented from falling off, the storage is convenient, and the grounding operation of the grounding end of the capacitor when the carbon brush assembly is mounted and the carbon brush assembly enters mechanical equipment such as a motor is also convenient.
The above-mentioned high electromagnetic compatibility carbon brush subassembly can further set up to: the nonpolar filter capacitor is a polypropylene capacitor.
By adopting the technical scheme, the nonpolar filter capacitor can adopt a polypropylene capacitor, a mica capacitor and a polyphenyl capacitor, and preferably adopts a polypropylene capacitor, namely a CBB capacitor, and has the advantages of low loss, no polarity, excellent frequency characteristic, higher dielectric constant, small volume, large capacity, high insulation impedance, better stability, high temperature resistance and self-healing property.
The beneficial effects of the utility model are as follows: through setting up the earthing terminal, strengthen anti-electromagnetic interference ability, reduce the requirement to filter equipment, set up the magnetic bead and can absorb high frequency noise and spike interference better at the earthing terminal, use nonpolar filter capacitor to connect first electric capacity and second electric capacity, can simplify the circuit again when reinforcing electromagnetic compatibility, and through setting up the brush line to be towards same direction connection inductance for whole circuit has been established ties.
Drawings
Fig. 1 is a top view of the present utility model.
Fig. 2 is a left side view of the present utility model.
Fig. 3 is a right side view of the present utility model.
Fig. 4 is a schematic structural view of the present utility model.
Description of the embodiments
The following description of the embodiments of the present utility model will be made more complete and clear by reference to the accompanying drawings, wherein it is to be understood that the embodiments described are merely some, but not all embodiments of the present utility model, and that all other embodiments, which may be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present utility model.
The carbon brush assembly with high electromagnetic compatibility as shown in figures 1-4 comprises a carbon brush mounting plate (1), a brush holder (2), a carbon brush (3), noise reduction components and parts and a lead (5), wherein a rotating shaft through hole (11) for a commutator of a motor to pass through is formed in the center position of the carbon brush mounting plate (1), the brush holder (2) is oppositely arranged on the carbon brush (3) mounting plate (1) by taking the rotating shaft through hole (11) as the center, one end, close to the rotating shaft through hole (11), of the brush holder is provided with a carbon brush outlet hole (21), the carbon brush (3) is arranged in the brush holder (2), a brush wire (31) is led out from the carbon brush (3), a spring (22) (not shown in the figure) with one end propped against the carbon brush (3) and the other end propped against the inner side wall of the brush holder (2) is further arranged in the brush holder (2), the spring (22) enables the carbon brush (3) to be propped against a steering piece all the time in the motor rotation process, the noise reduction components and parts comprise an inductor (4), a first capacitor (6), a second capacitor (7), a third capacitor (8) and magnetic beads (9), an inductor (1) are arranged on the carbon brush holder (41), an inductor (41) and a support frame (4) are arranged on the carbon brush holder (4) and a capacitor (4) are arranged on one side, and its earthing terminal all overlaps and is equipped with magnetic bead (9) that are used for absorbing high frequency noise and peak interference, third electric capacity (8) are preferably CBB electric capacity, lead wire (5) have two, one is black line, another is the red line, two lead wires (5) are fixed by rubber (51) of being qualified for the next round of competitions, the earthing terminal that first electric capacity (6) and second electric capacity (7) cover were equipped with magnetic bead (9) all is passed carbon brush mounting panel (1) and is implemented fixedly, the welding black line after the first electric capacity (6) other end is flattened through the copper rivet, inductance (4), brush line (31) and third electric capacity (8) one end, the welding red line after the second electric capacity (7) other end is flattened through the copper rivet, inductance (4), brush line (31), and third electric capacity (8) other end.
Ideal working principle of this embodiment: the small capacitance filters high frequencies and the large capacitance filters low frequencies.
The signal is due to the capacitive reactance Xc of the capacitor, the parameter characterizes the blocking effect of the capacitor on the alternating current signal, the unit is ohm, the capacitive reactance value X is equal to the frequency of the alternating current signal and the capacitive reactance xc=1/2 pi related to the capacity C of the capacitor, the frequency f is equal to the capacity C, when the capacitance value is constant, the capacitive reactance is smaller when the frequency is higher, and when the frequency is constant, the formula can be found that the capacitive reactance is smaller when the capacitance is larger, and the capacitive reactance Xc of the capacitor is approximate to infinity when the frequency is equal to the open circuit for the direct current signal with the frequency f=0.
Claims (7)
1. The utility model provides a high electromagnetic compatibility carbon brush subassembly, including carbon brush mounting panel, brush holder, carbon brush, filter equipment and lead wire, the pivot through-hole has been seted up to the central point of carbon brush mounting panel, the brush holder with the pivot through-hole is relative to be set up on the carbon brush mounting panel as the center, just the one end that the brush holder is close to the pivot through-hole is equipped with the carbon brush and goes out the hole, there is the brush line to draw forth on the carbon brush, filter equipment is including inductance, first electric capacity and second electric capacity, its characterized in that: the first capacitor or the second capacitor is electrically connected with the lead wire and the inductor, the first capacitor and the second capacitor are provided with grounding ends, and the grounding ends are provided with magnetic beads.
2. The high electromagnetic compatibility carbon brush assembly according to claim 1, wherein: the filter device further comprises a nonpolar filter capacitor, and the first capacitor is connected with the second capacitor through the nonpolar filter capacitor.
3. The high electromagnetic compatibility carbon brush assembly according to claim 1 or 2, characterized in that: the brush wire is connected with the inductor towards a direction away from the first capacitor or the second capacitor.
4. The high electromagnetic compatibility carbon brush assembly according to claim 3, wherein: the first capacitor or the second capacitor is riveted with the lead wire through welding or hot melting, and the inductor is formed by the first capacitor and the second capacitor.
5. The high electromagnetic compatibility carbon brush assembly according to claim 4, wherein: the carbon brush mounting plate is provided with an inductance support frame, the inductance support frame is positioned on two sides of the brush holder, and the inductance is arranged above the carbon brush through the inductance support frame.
6. The high electromagnetic compatibility carbon brush assembly according to claim 5, wherein: the grounding end penetrates through the carbon brush mounting plate.
7. The high electromagnetic compatibility carbon brush assembly according to claim 6, wherein: the nonpolar filter capacitor is a polypropylene capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321166482.9U CN219696879U (en) | 2023-05-12 | 2023-05-12 | High electromagnetic compatibility carbon brush assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321166482.9U CN219696879U (en) | 2023-05-12 | 2023-05-12 | High electromagnetic compatibility carbon brush assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219696879U true CN219696879U (en) | 2023-09-15 |
Family
ID=87967094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321166482.9U Active CN219696879U (en) | 2023-05-12 | 2023-05-12 | High electromagnetic compatibility carbon brush assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219696879U (en) |
-
2023
- 2023-05-12 CN CN202321166482.9U patent/CN219696879U/en active Active
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