CN209823718U - Filter for vehicle-mounted terminal equipment power supply - Google Patents
Filter for vehicle-mounted terminal equipment power supply Download PDFInfo
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- CN209823718U CN209823718U CN201920577177.6U CN201920577177U CN209823718U CN 209823718 U CN209823718 U CN 209823718U CN 201920577177 U CN201920577177 U CN 201920577177U CN 209823718 U CN209823718 U CN 209823718U
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- mounted terminal
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Abstract
The utility model provides a filter for a vehicle-mounted terminal equipment power supply, which comprises a preceding filter and a secondary filter; the pre-filter includes: the common-mode inductor LC1, the Y capacitor CY1 and the Y capacitor CY 2; the two-stage filter includes: magnetic bead LD2, Y capacitance CY3, Y capacitance CY4, X capacitance CX1 and X capacitance CX 2. The utility model relates to a wave filter for vehicle-mounted terminal equipment power, preceding stage wave filter and secondary filter are used in the cooperation, can install additional on vehicle-mounted terminal equipment power, can effectively reduce vehicle-mounted terminal equipment's electromagnetic interference, improve the electromagnetic compatibility performance of vehicle-mounted terminal product.
Description
Technical Field
The utility model belongs to on-vehicle terminal electromagnetic compatibility field especially relates to a wave filter for vehicle terminal equipment power.
Background
The vehicle-mounted terminal is used as a front-end device of a vehicle monitoring and management system, relates to the fields of positioning, communication, automobile driving record and the like, and can realize the functions of remote state monitoring, emergency accident alarming and the like of an automobile. With the improvement of the complexity of the automobile terminal, the electromagnetic compatibility of the whole automobile and the component has stricter requirements, and the reduction of the disturbance of the automobile terminal is a necessary way for improving the electromagnetic compatibility of the automobile terminal product. According to the test result of conducted emission, the external electromagnetic disturbance of the vehicle-mounted terminal is mainly caused by power supply ripples.
Disclosure of Invention
In view of this, the utility model aims at providing a wave filter for vehicle terminal equipment power, preceding stage filter and secondary filter are used in the cooperation, can install additional on vehicle terminal equipment power, can effectively reduce vehicle terminal equipment's electromagnetic interference, improve the electromagnetic compatibility performance of vehicle terminal product.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a filter for a power supply of a vehicle-mounted terminal device comprises a pre-stage filter and a secondary filter; the pre-filter includes: the common-mode inductor LC1, the Y capacitor CY1 and the Y capacitor CY 2; the two-stage filter includes: magnetic bead LD2, Y capacitor CY3, Y capacitor CY4, X capacitor CX1 and X capacitor CX 2; pin 1 and pin 2 of the common mode inductor LC1 are communicated with each other, and pin 3 and pin 4 are communicated with each other; pin 1 and pin 2 of the magnetic bead LD2 are communicated with each other, and pin 3 and pin 4 are communicated with each other; pin 1 of the Y capacitor CY1 is connected to pin 1 of the common mode inductor LC 1; pin 2 of the Y capacitor CY1 is connected to pin 2 of the Y capacitor CY2 and grounded; pin 3 of the common mode inductor LC1 is connected to pin 1 of the Y capacitor CY 2; pin 2 of the common mode inductor LC1 is connected with pin 1 of the X capacitor CX1 and pin 1 of the magnetic bead LD 2; a pin 4 of the common mode inductor LC1 is connected with a pin 2 of the X capacitor CX1 and a pin 3 of the magnetic bead LD 2; pin 2 of the magnetic bead LD2 is connected with pin 1 of the Y capacitor CY3 and pin 1 of the X capacitor CX 2; a pin 4 of the magnetic bead LD2 is connected with a pin 1 of the Y capacitor CY4 and a pin 2 of the X capacitor CX 2; pin 2 of the Y capacitor CY3 and pin 2 of the Y capacitor CY4 are connected and grounded; pin 1 of Y electric capacity CY1 constitutes power input end positive and negative pole with pin 1 of Y electric capacity CY2, and pin 1 of X electric capacity CX2 constitutes power output end positive and negative pole with pin 2 of X electric capacity CX 2.
The vehicle-mounted terminal equipment mainly comprises an MCU, a GPS, a GPRS, an SD Card and a data acquisition and data storage module, is a digital logic circuit mainly based on high-speed data communication, and according to the regulation of GB/T18655-2010, a disturbance source of the type is basically narrow-band disturbance, so that disturbance signals of the vehicle-mounted terminal are mainly narrow-band, and external electromagnetic disturbance of the vehicle-mounted terminal is mainly caused by power supply ripples. Therefore, the filter for the vehicle-mounted terminal equipment power supply is loaded to the positive electrode and the negative electrode of the power line of the vehicle-mounted terminal equipment when in use.
The magnetic bead LD2 is used for absorbing high-frequency disturbance noise of 30 MHz-108 MHz.
Further, Y capacitor CY1 and Y capacitor CY2 are 0603 capacitor 330 pF.
Further, the common mode inductor LC1 is DLW32MH101XK2 model, and the inductance is 100 muH.
Further, the magnetic bead LD2 is HH-1H3216-500 type.
Compared with the prior art, the utility model relates to a wave filter for vehicle-mounted terminal equipment power has following advantage:
the utility model relates to a wave filter for vehicle-mounted terminal equipment power, preceding stage wave filter and secondary filter are used in the cooperation, can install additional on vehicle-mounted terminal equipment power, can effectively reduce vehicle-mounted terminal equipment's electromagnetic interference, improve the electromagnetic compatibility performance of vehicle-mounted terminal product.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
In the drawings:
fig. 1 is a schematic diagram of a filter circuit for a power supply of a vehicle-mounted terminal device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a noise state before use of a filter for a power supply of a vehicle-mounted terminal device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a noise state after use of a filter for a power supply of a vehicle-mounted terminal device according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, a filter for a power supply of a vehicle-mounted terminal device includes a pre-stage filter and a secondary filter; the pre-filter includes: the common-mode inductor LC1, the Y capacitor CY1 and the Y capacitor CY 2; the two-stage filter includes: magnetic bead LD2, Y capacitor CY3, Y capacitor CY4, X capacitor CX1 and X capacitor CX 2; pin 1 and pin 2 of the common mode inductor LC1 are communicated with each other, and pin 3 and pin 4 are communicated with each other; pin 1 and pin 2 of the magnetic bead LD2 are communicated with each other, and pin 3 and pin 4 are communicated with each other; pin 1 of the Y capacitor CY1 is connected to pin 1 of the common mode inductor LC 1; pin 2 of the Y capacitor CY1 is connected to pin 2 of the Y capacitor CY2 and grounded; pin 3 of the common mode inductor LC1 is connected to pin 1 of the Y capacitor CY 2; pin 2 of the common mode inductor LC1 is connected with pin 1 of the X capacitor CX1 and pin 1 of the magnetic bead LD 2; a pin 4 of the common mode inductor LC1 is connected with a pin 2 of the X capacitor CX1 and a pin 3 of the magnetic bead LD 2; pin 2 of the magnetic bead LD2 is connected with pin 1 of the Y capacitor CY3 and pin 1 of the X capacitor CX 2; a pin 4 of the magnetic bead LD2 is connected with a pin 1 of the Y capacitor CY4 and a pin 2 of the X capacitor CX 2; pin 2 of the Y capacitor CY3 and pin 2 of the Y capacitor CY4 are connected and grounded; pin 1 of Y electric capacity CY1 constitutes power input end positive and negative pole with pin 1 of Y electric capacity CY2, and pin 1 of X electric capacity CX2 constitutes power output end positive and negative pole with pin 2 of X electric capacity CX 2.
The vehicle-mounted terminal equipment mainly comprises an MCU, a GPS, a GPRS, an SD Card and a data acquisition and data storage module, is a digital logic circuit mainly based on high-speed data communication, and according to the regulation of GB/T18655-2010, a disturbance source of the type is basically narrow-band disturbance, so that disturbance signals of the vehicle-mounted terminal are mainly narrow-band, and external electromagnetic disturbance of the vehicle-mounted terminal is mainly caused by power supply ripples. Therefore, the filter for the vehicle-mounted terminal equipment power supply is loaded on the positive and negative power supply lines of the vehicle-mounted terminal equipment when in use.
The magnetic bead LD2 is used for absorbing high-frequency disturbance noise of 30 MHz-108 MHz.
As shown in fig. 1, Y capacitor CY1 and Y capacitor CY2 are 0603 capacitors of 330 pF.
As shown in fig. 1, the common mode inductor LC1 is model DLW32MH101XK2 with a inductance of 100 μ H.
As shown in FIG. 1, the magnetic bead LD2 is model HH-1H 3216-500.
As shown in fig. 2, the peak detector is used to compare the states of the disturbance signals before and after the filter is installed.
As shown in fig. 3, the average detector is used to compare the states of the disturbance signals before and after the filter of the present invention is installed.
As shown in FIGS. 2-3, the utility model discloses a wave filter for vehicle-mounted terminal equipment power can effectively reduce vehicle-mounted terminal equipment's electromagnetic interference, improves vehicle-mounted terminal product's electromagnetic compatibility performance.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A filter for a vehicle-mounted terminal device power supply, characterized in that: comprises a pre-filter and a secondary filter; the pre-filter includes: the common-mode inductor LC1, the Y capacitor CY1 and the Y capacitor CY 2; the two-stage filter includes: magnetic bead LD2, Y capacitor CY3, Y capacitor CY4, X capacitor CX1 and X capacitor CX 2; pin 1 and pin 2 of the common mode inductor LC1 are communicated with each other, and pin 3 and pin 4 are communicated with each other; pin 1 and pin 2 of the magnetic bead LD2 are communicated with each other, and pin 3 and pin 4 are communicated with each other; pin 1 of the Y capacitor CY1 is connected to pin 1 of the common mode inductor LC 1; pin 2 of the Y capacitor CY1 is connected to pin 2 of the Y capacitor CY2 and grounded; pin 3 of the common mode inductor LC1 is connected to pin 1 of the Y capacitor CY 2; pin 2 of the common mode inductor LC1 is connected with pin 1 of the X capacitor CX1 and pin 1 of the magnetic bead LD 2; pin 4 of the common mode inductor LC1 is connected with pin 2 of the X capacitor CX1 and pin 3 of the magnetic bead LD 2; the pin 2 of the magnetic bead LD2 is connected with the pin 1 of the Y capacitor CY3 and the pin 1 of the X capacitor CX 2; the pin 4 of the magnetic bead LD2 is connected with the pin 1 of the Y capacitor CY4 and the pin 2 of the X capacitor CX 2; pin 2 of the Y capacitor CY3 and pin 2 of the Y capacitor CY4 are connected to ground; y electric capacity CY 1's pin 1 with Y electric capacity CY 2's pin 1 constitutes power input end positive negative pole, X electric capacity CX 2's pin 1 with X electric capacity CX 2's pin 2 constitutes power output end positive negative pole.
2. The filter for a vehicle-mounted terminal device power supply according to claim 1, characterized in that: the Y capacitor CY1 and the Y capacitor CY2 are 0603 capacitor 330 pF.
3. The filter for a vehicle-mounted terminal device power supply according to claim 1, characterized in that: the common mode inductor LC1 is DLW32MH101XK2 model and has the inductance of 100 mu H.
4. The filter for a vehicle-mounted terminal device power supply according to claim 1, characterized in that: the magnetic bead LD2 is HH-1H3216-500 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920577177.6U CN209823718U (en) | 2019-04-25 | 2019-04-25 | Filter for vehicle-mounted terminal equipment power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920577177.6U CN209823718U (en) | 2019-04-25 | 2019-04-25 | Filter for vehicle-mounted terminal equipment power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209823718U true CN209823718U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920577177.6U Expired - Fee Related CN209823718U (en) | 2019-04-25 | 2019-04-25 | Filter for vehicle-mounted terminal equipment power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209823718U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086444A (en) * | 2019-04-25 | 2019-08-02 | 中国汽车技术研究中心有限公司 | A kind of filter for vehicle-mounted terminal equipment power supply |
-
2019
- 2019-04-25 CN CN201920577177.6U patent/CN209823718U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086444A (en) * | 2019-04-25 | 2019-08-02 | 中国汽车技术研究中心有限公司 | A kind of filter for vehicle-mounted terminal equipment power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 |