CN216122112U - Circuit capable of solving electromagnetic interference of vehicle-mounted direct current brush motor - Google Patents
Circuit capable of solving electromagnetic interference of vehicle-mounted direct current brush motor Download PDFInfo
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- CN216122112U CN216122112U CN202122267033.0U CN202122267033U CN216122112U CN 216122112 U CN216122112 U CN 216122112U CN 202122267033 U CN202122267033 U CN 202122267033U CN 216122112 U CN216122112 U CN 216122112U
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- brush motor
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- mode inductor
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Abstract
The utility model discloses a circuit capable of solving electromagnetic interference of a vehicle-mounted direct-current brush motor, which comprises a common-mode inductor arranged between the direct-current brush motor and a power supply; a first input end of the common mode inductor is grounded through a first capacitor, and a second output end of the common mode inductor is grounded through a second capacitor; a third capacitor is connected between the first input end and the second output end of the common mode inductor, and a fourth capacitor is connected between the second input end and the first output end 3. The utility model can absorb various electromagnetic interferences generated in the carbon brush reversing process of the direct current brush motor by a plurality of capacitors, thereby solving the problem of electromagnetic interferences of the brush direct current motor carried on the vehicle.
Description
Technical Field
The utility model relates to an accessory of an automobile, in particular to a circuit capable of solving electromagnetic interference of a vehicle-mounted direct-current brush motor.
Background
With the rapid development of the automotive industry technology, more and more electric machines have been applied to automobiles. Through the application of the motor on the automobile, the automation of the automobile can be realized, and the driving safety and the comfort are enhanced. Different types of electric motors are used for different functional modules of a motor vehicle due to their respective characteristics, and brushed dc motors are also used for a plurality of functional modules of a motor vehicle.
A dc brush motor is a rotating electrical machine that includes a brush device and is capable of converting dc electrical energy into mechanical energy or converting mechanical energy into dc electrical energy. In contrast to dc brushless motors, brush devices are used to draw in or out dc voltages and dc currents. The DC brush motor is the basis of all motors, and has the characteristics of quick start, timely braking, capability of smoothly regulating the speed in a large range, relatively simple control circuit and the like. However, because the direct current brush motor adopts mechanical commutation, the commutation of the carbon brush during operation can generate instantaneous current change and spark, thereby causing more obvious electromagnetic interference, which becomes an important electromagnetic interference source in an electronic and electrical system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a circuit capable of solving the electromagnetic interference of a vehicle-mounted direct current brush motor, which can solve the problem of the electromagnetic interference generated by the vehicle-mounted brush direct current motor in the working process.
In order to solve the technical problems, the technical solution of the circuit capable of solving the electromagnetic interference of the vehicle-mounted direct current brush motor is as follows:
the common-mode inductor is arranged between the direct-current brush motor and a power supply; a first input end of the common mode inductor is grounded through a first capacitor, and a second output end of the common mode inductor is grounded through a second capacitor; a third capacitor is connected between the first input end and the second output end of the common mode inductor, and a fourth capacitor is connected between the second input end and the first output end.
In another embodiment, a first input end of the common mode inductor is connected to a positive electrode of the dc brushed motor, and a second input end of the common mode inductor is connected to a positive electrode of the power supply.
In another embodiment, the first output terminal of the common mode inductor is connected to the negative electrode of the power supply, and the second output terminal of the common mode inductor is connected to the negative electrode of the dc brush motor.
In another embodiment, the common mode inductor and the third and fourth capacitors form a CLC filter circuit.
In another embodiment, the power supply is a 12V low voltage power supply.
The utility model can achieve the technical effects that:
according to the utility model, the spark interference generated by the direct current brush motor in the commutation process is absorbed through the first capacitor C1 and the second capacitor C2, so that the common-mode interference generated by the motor can be suppressed from the source. The differential mode interference of the direct current brush motor is absorbed through the third capacitor C3 and the fourth capacitor C4.
The utility model can absorb various electromagnetic interferences generated in the carbon brush reversing process of the direct current brush motor by a plurality of capacitors, thereby solving the problem of electromagnetic interferences of the brush direct current motor carried on the vehicle.
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It is to be understood by those skilled in the art that the following description is only exemplary of the principles of the present invention, which may be applied in numerous ways to achieve many different alternative embodiments. These descriptions are made for the purpose of illustrating the general principles of the present teachings and are not meant to limit the inventive concepts disclosed herein.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and, together with the general description given above and the detailed description of the drawings given below, serve to explain the principles of the utility model.
The utility model is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic diagram of a circuit capable of solving electromagnetic interference of a vehicle-mounted DC brush motor according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and similar words are intended to mean that the elements or items listed before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As shown in fig. 1, the circuit capable of solving the electromagnetic interference of the vehicle-mounted direct current brush motor comprises a common-mode inductor L; a first input end 1 of the common mode inductor L is connected with an anode P of the direct current brush motor, and a second input end 2 of the common mode inductor L is connected with a power supply anode DC +; a first output end 3 of the common mode inductor L is connected with a power supply cathode DC-, and a second output end 4 of the common mode inductor L is connected with a cathode N of the direct current brush motor;
the first input terminal 1 of the common mode inductor L is grounded through a first capacitor C1;
the second output terminal 4 of the common mode inductor L is grounded via a second capacitor C2;
a third capacitor C3 is connected between the first input end 1 and the second output end 4 of the common mode inductor L; a fourth capacitor C4 is connected between the second input end 2 and the first output end 3;
the common mode inductor L forms a CLC filter circuit with a third capacitor C3 and a fourth capacitor C4.
The power supply in the utility model can adopt a low-voltage power supply of 12V or 24V.
The utility model connects the first input end 1 of the common mode inductor L to the ground through the first capacitor C1, and connects the second output end 4 to the ground through the second capacitor C2; spark interference generated by the direct current brush motor in the commutation process is absorbed through the first capacitor C1 and the second capacitor C2, so that common mode interference generated by the motor can be restrained from sources.
According to the utility model, a third capacitor C3 is connected between a first input end 1 and a second output end 4 of a common mode inductor L; a fourth capacitor C4 is connected between the second input end 2 and the first output end 3; differential mode interference of the direct current brush motor is absorbed through the third capacitor C3 and the fourth capacitor C4.
According to different motor states, different values can be matched with the inductors and the capacitors, and therefore interference under different frequencies is absorbed.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the utility model. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (6)
1. The utility model provides a can solve on-vehicle direct current and have brush motor electromagnetic interference's circuit which characterized in that: the common-mode inductor is arranged between the direct-current brush motor and a power supply; a first input end of the common mode inductor is grounded through a first capacitor, and a second output end of the common mode inductor is grounded through a second capacitor; a third capacitor is connected between the first input end and the second output end of the common mode inductor, and a fourth capacitor is connected between the second input end and the first output end.
2. The circuit capable of solving the electromagnetic interference of the vehicle-mounted direct-current brush motor according to claim 1 is characterized in that: the first input end of the common mode inductor is connected with the positive electrode of the direct current brush motor, and the second input end of the common mode inductor is connected with the positive electrode of the power supply.
3. The circuit capable of solving the electromagnetic interference of the vehicle-mounted direct-current brush motor according to claim 2 is characterized in that: and the first output end of the common-mode inductor is connected with the negative electrode of the power supply, and the second output end of the common-mode inductor is connected with the negative electrode of the direct-current brush motor.
4. The circuit capable of solving the electromagnetic interference of the vehicle-mounted direct-current brush motor according to claim 1 is characterized in that: the common mode inductor, the third capacitor and the fourth capacitor form a CLC filter circuit.
5. The circuit capable of solving the electromagnetic interference of the vehicle-mounted direct-current brush motor according to claim 1 is characterized in that: the power supply is a low-voltage power supply.
6. The circuit capable of solving the electromagnetic interference of the vehicle-mounted direct-current brush motor according to claim 1 is characterized in that: the power supply is 12V or 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122267033.0U CN216122112U (en) | 2021-09-17 | 2021-09-17 | Circuit capable of solving electromagnetic interference of vehicle-mounted direct current brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122267033.0U CN216122112U (en) | 2021-09-17 | 2021-09-17 | Circuit capable of solving electromagnetic interference of vehicle-mounted direct current brush motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216122112U true CN216122112U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122267033.0U Active CN216122112U (en) | 2021-09-17 | 2021-09-17 | Circuit capable of solving electromagnetic interference of vehicle-mounted direct current brush motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216122112U (en) |
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2021
- 2021-09-17 CN CN202122267033.0U patent/CN216122112U/en active Active
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