CN216818117U - Multifunctional filtering switch device for electromagnetic compatibility test - Google Patents
Multifunctional filtering switch device for electromagnetic compatibility test Download PDFInfo
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- CN216818117U CN216818117U CN202123207863.0U CN202123207863U CN216818117U CN 216818117 U CN216818117 U CN 216818117U CN 202123207863 U CN202123207863 U CN 202123207863U CN 216818117 U CN216818117 U CN 216818117U
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Abstract
The utility model discloses a multifunctional filtering switch device for an electromagnetic compatibility test, which comprises a shell, an operating switch, a printed board and a filtering circuit, wherein a public input wiring terminal, a direct current input negative wiring terminal, an alternating current zero line input wiring terminal, a public output wiring terminal, a direct current output negative wiring terminal and an alternating current zero line output wiring terminal are arranged on the shell, the operating switch is connected between the inner end of the public input wiring terminal and the inner end of the public output wiring terminal in series, and the filtering circuit is respectively and correspondingly connected with the inner end of the public input wiring terminal, the inner end of the direct current input negative wiring terminal, the inner end of the alternating current zero line input wiring terminal, the inner end of the public output wiring terminal, the inner end of the direct current output negative wiring terminal and the inner end of the alternating current zero line output wiring terminal. The utility model can meet the electromagnetic compatibility test requirements of various AC and DC power supply type equipment, has high reliability, can meet the index requirement once, is convenient to use and can be repeatedly used.
Description
Technical Field
The utility model relates to an electromagnetic compatibility test device, in particular to a multifunctional filtering switch device for an electromagnetic compatibility test.
Background
In the traditional electromagnetic compatibility test process, when the electronic equipment is required to be tested for generating voltage spikes due to switch operation, simple switch operations such as a single air switch or a button switch, a single-pole double-throw switch and the like are often used, so that the test requirements cannot be met due to the fact that the voltage spikes generated by the switch operations per se exceed standards.
In order to avoid the problem that voltage spikes exceed standards caused by switch operation, a filter device is temporarily added on a switch in the conventional mode to reduce voltage spike interference caused by manual switch operation, and the mode is low in reliability due to the temporary connection of the filter circuit, difficult to meet index requirements, difficult to meet the index requirements at one time, time-consuming and labor-consuming, and incapable of being reused. Even so, the conventional temporary device of the switch + filter circuit can only perform the electromagnetic compatibility test of a single direct current power supply or alternating current power supply, and has the defects of single function, time and labor consuming in manufacturing and inconvenience in use.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide a multifunctional filter switch device for an electromagnetic compatibility test, which has high reliability and can be reused.
The utility model achieves the above purpose through the following technical scheme:
a multifunctional filter switch device for electromagnetic compatibility test comprises a shell, an operating switch arranged on the shell, a printed board and a filter circuit arranged on the printed board, wherein a public input terminal, a direct current input negative terminal, an alternating current zero line input terminal, a public output terminal, a direct current output negative terminal and an alternating current zero line output terminal are arranged on the shell, the outer end of the public input terminal is used for being connected with a positive pole of a direct current power supply or a live wire of the alternating current power supply, the outer end of the direct current input negative terminal is used for being connected with a negative pole of the direct current power supply, the outer end of the alternating current zero line input terminal is used for being connected with a zero line of the alternating current power supply, the outer end of the public output terminal, the outer end of the direct current output negative terminal and the outer end of the alternating current zero line output terminal are respectively used for being connected with corresponding loads, the filter circuit is correspondingly connected with the inner end of the public input terminal, the inner end of the direct current input negative terminal, the inner end of the alternating current zero line input terminal, the inner end of the public output terminal, the inner end of the direct current output negative terminal and the inner end of the alternating current zero line output terminal respectively. The filter circuit can be determined according to actual needs, and the filter function can be realized between the inner end of the public input terminal and the inner end of the public output terminal, between the inner end of the direct current input negative terminal and the inner end of the direct current output negative terminal, and between the inner end of the alternating current zero line input terminal and the inner end of the alternating current zero line output terminal.
Preferably, in order to achieve a good filtering function, the filtering circuit includes a first differential mode inductor, a second differential mode inductor, a third differential mode inductor, a common mode inductor, a first filtering capacitor, a second filtering capacitor, a third filtering capacitor and a fourth filtering capacitor, the common mode inductor includes a magnetic ring and three sets of coils wound on the magnetic ring, an inner end of the common input terminal is connected to one end of the first differential mode inductor, another end of the first filtering capacitor, one end of the second filtering capacitor and one end of the first set of coils of the common mode inductor are connected to each other, an inner end of the dc input negative terminal is connected to one end of the second differential mode inductor, another end of the first filtering capacitor and one end of the second set of coils of the common mode inductor are connected to each other, the other end of the second group of coils of the common mode inductor, the other end of the third filtering capacitor and the other end of the fourth filtering capacitor are connected with one end of the DC output negative terminal, and the other end of the third group of coils of the common mode inductor, the other end of the fourth filtering capacitor and the other end of the DC output negative terminal are connected with one another.
Preferably, in order to wind the three coils on one magnetic ring to form a common mode inductor, the second group of coils and the third group of coils of the common mode inductor are wound on the corresponding magnetic ring in an overlapped mode, and the second group of coils and the third group of coils of the common mode inductor are isolated through a high-temperature-resistant insulating tape.
Preferably, for ease of operation, the operating switch is a single pole double throw rocker switch.
Preferably, in order to facilitate quick connection and disconnection with other equipment, the common input terminal, the dc input negative terminal, the ac neutral input terminal, the common output terminal, the dc output negative terminal, and the ac neutral output terminal are all jack terminals.
The utility model has the beneficial effects that:
the operation switch and the filter circuit are integrated in the same shell, and the switch and the filter function of the direct current power supply and the alternating current power supply are integrated together, so that the electromagnetic compatibility test requirement of various alternating current and direct current power supply type equipment can be met, the reliability is high, the index requirement can be met at one time, only the power supply and the corresponding load are needed to be connected when the electromagnetic compatibility test device is used, the use is convenient, and the repeated use can be realized; by designing the common input terminal and the common output terminal as the common terminals of the direct current power supply and the alternating current power supply and connecting the operation switch between the direct current power supply and the alternating current power supply in series, parts required by the direct current power supply and the alternating current power supply for respective tests are reduced, the structure is simplified on the premise of no change of functions, the product volume and the cost are reduced, and the application is facilitated.
Drawings
Fig. 1 is a perspective exploded view of a multifunctional filter switch device for electromagnetic compatibility test according to the present invention before assembly;
fig. 2 is a schematic circuit diagram of the multifunctional filtering switch device for electromagnetic compatibility test according to the utility model.
Detailed Description
The utility model will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, the multifunctional filtering switch device for electromagnetic compatibility test of the present invention includes a housing 12, an operating switch 13 mounted on the housing 12, a printed board 5 and a filtering circuit mounted on the printed board 5, wherein a common input terminal 14, a dc input negative terminal 15, an ac zero line input terminal 16, a common output terminal 8, a dc output negative terminal 10 and an ac zero line output terminal 11 are mounted on the housing 12, an outer end of the common input terminal 14 is used for connecting with a positive pole of a dc power supply or a live wire of the ac power supply, an outer end of the dc input negative terminal 15 is used for connecting with a negative pole of the dc power supply, an outer end of the ac zero line input terminal 16 is used for connecting with a zero line of the ac power supply, an outer end of the common output terminal 8, an outer end of the dc output negative terminal 10 and an outer end of the ac zero line output terminal 11 are respectively used for connecting with corresponding loads, the operating switch 13 is connected in series between the inner end of the common input terminal 14 and the inner end of the common output terminal 8, and the filter circuit is correspondingly connected with the inner end of the common input terminal 14, the inner end of the direct current input negative terminal 15, the inner end of the alternating current zero line input terminal 16, the inner end of the common output terminal 8, the inner end of the direct current output negative terminal 10 and the inner end of the alternating current zero line output terminal 11 respectively.
As shown in fig. 1 and fig. 2, the present invention also discloses a plurality of more optimized specific structures, and the structures can be combined with one or more structures to form a more optimized technical solution according to actual needs.
In order to achieve good filtering function, the filtering circuit includes a first differential mode inductor L1 (i.e. 7 in fig. 1), a second differential mode inductor L2 (not visible in fig. 1), a third differential mode inductor L3 (not visible in fig. 1), a common mode inductor L4 (i.e. 9 in fig. 1), a first filtering capacitor C1 (i.e. 2 in fig. 1), a second filtering capacitor C2 (i.e. 3 in fig. 1), a third filtering capacitor C3 (i.e. 4 in fig. 1), and a fourth filtering capacitor C4 (i.e. 6 in fig. 1), the common mode inductor L4 includes a magnetic ring and three sets of coils wound on the magnetic ring, an inner end of a common input terminal Vin + i.e. 14 in fig. 1 is connected to one end of the first differential mode inductor L1, another end of the first differential mode inductor L1, one end of the first filtering capacitor C1, one end of the second filtering capacitor C2, and one end of a first set of a DC coil of the common mode inductor L4, a negative terminal DC-terminal of a negative terminal Vin-DC-2 in fig. 15 in fig. 1 is connected to one end of the second differential mode inductor L2, the other end of the second differential-mode inductor L2, the other end of the first filter capacitor C1 and one end of the second set of coils of the common-mode inductor L4 are connected to each other, the alternating current neutral input terminal VinAC-i.e. the inner end of 16 in fig. 1 is connected to one end of the third differential-mode inductor L3, the other end of the third differential-mode inductor L3, the other end of the second filter capacitor C2 and one end of the third set of coils of the common-mode inductor L4 are connected to each other, the other end of the first set of coils of the common-mode inductor L4, one end of the third filter capacitor C3, one end of the fourth filter capacitor C4 and one end of the operating switch K, i.e. 13 in fig. 1, are connected to each other, the other end of the operating switch K is connected to the common output terminal Vout +, i.e. the inner end of 8 in fig. 1, the other end of the second set of coils of the common-mode inductor L4, the other end of the third filter capacitor C3 and the inner end of the direct current output negative terminal Vout DC-i.e. the inner end of 10 in fig. 1 are connected to each other, the other end of the third set of coils of the common mode inductor L4, the other end of the fourth filter capacitor C4 and the ac neutral output terminal VoutAC, i.e. the inner end of 11 in fig. 1, are connected to each other. Description of the drawings: the names of the corresponding components in fig. 1 and 2 are labeled differently, respectively, so that the corresponding components are the same component for convenience of expression.
In order to wind the three coils on one magnetic ring to form the common mode inductor 9, the second group of coils and the third group of coils of the common mode inductor 9 are mutually overlapped and wound on the corresponding magnetic ring, and the second group of coils and the third group of coils of the common mode inductor 9 are isolated by a high temperature resistant insulating tape.
For ease of operation, the operating switch 13 is a single pole double throw rocker switch.
In order to facilitate quick connection and disconnection with other equipment, the common input terminal 14, the direct current input negative terminal 15, the alternating current zero line input terminal 16, the common output terminal 8, the direct current output negative terminal 10 and the alternating current zero line output terminal 11 are jack-type terminals.
Fig. 1 also shows a cover plate 1 connected to the housing 12, in a conventional configuration.
As shown in fig. 1 and fig. 2, when in use, the access mode is selected according to the power supply situation, if the power supply is a direct current power supply, the common input terminal 14, i.e. Vin + in fig. 2, is connected with the positive pole of the power supply, the direct current input negative terminal 15, i.e. Vin DC-in fig. 2, is connected with the negative pole of the power supply, the common output terminal 8, i.e. Vout + in fig. 2, is connected with the positive input end of the load, and the direct current output negative terminal 10, i.e. Vout DC-in fig. 2, is connected with the negative input end of the load; in the case of an ac power supply, the common input terminal 14, i.e., Vin + in fig. 2, is connected to the live power line, the ac neutral input terminal 16, i.e., VinAC-in fig. 2, is connected to the neutral power line, the common output terminal 8, i.e., Vout + in fig. 2, is connected to the live load input, and the ac neutral output terminal 11, i.e., VoutAC-in fig. 2, is connected to the live load input. Because both connection modes have respective filter circuits, voltage spikes can be well filtered, so that the voltage spikes generated by the on-off of the operating switch 13 meet the standard requirements.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Claims (5)
1. A multifunctional filtering switch device for electromagnetic compatibility test comprises a shell and an operating switch arranged on the shell, and is characterized in that: the power supply circuit comprises a shell, a public input terminal, a direct current input negative terminal, an alternating current zero line input terminal, a public output terminal, a direct current output negative terminal and an alternating current zero line output terminal, wherein the shell is provided with the public input terminal, the direct current input negative terminal, the alternating current zero line input terminal, the public output terminal, the direct current output negative terminal and the alternating current zero line output terminal, the outer end of the public input terminal is used for being connected with a positive pole of a direct current power supply or a live wire of the alternating current power supply, the outer end of the direct current input negative terminal is used for being connected with a negative pole of the direct current power supply, the outer end of the alternating current zero line input terminal is used for being connected with a zero line of the alternating current power supply, the outer end of the public output terminal, the outer end of the direct current output negative terminal and the outer end of the alternating current zero line output terminal are respectively used for being connected with corresponding loads, and an operating switch is connected between the inner end of the public input terminal and the inner end of the public output terminal in series, the filter circuit is correspondingly connected with the inner end of the public input terminal, the inner end of the direct current input negative terminal, the inner end of the alternating current zero line input terminal, the inner end of the public output terminal, the inner end of the direct current output negative terminal and the inner end of the alternating current zero line output terminal respectively.
2. The multifunctional filter switch device for electromagnetic compatibility test according to claim 1, characterized in that: the filter circuit comprises a first differential mode inductor, a second differential mode inductor, a third differential mode inductor, a common mode inductor, a first filter capacitor, a second filter capacitor, a third filter capacitor and a fourth filter capacitor, the common mode inductor comprises a magnetic ring and three groups of coils wound on the magnetic ring, the inner end of a common input terminal is connected with one end of the first differential mode inductor, the other end of the first differential mode inductor, one end of the first filter capacitor, one end of the second filter capacitor and one end of the first group of coils of the common mode inductor are connected with each other, the inner end of a direct current input negative terminal is connected with one end of the second differential mode inductor, the other end of the first filter capacitor and one end of the second group of coils of the common mode inductor are connected with each other, the inner end of an alternating current zero line input terminal is connected with one end of the third differential mode inductor, the other end of the third differential mode inductor, the other end of the second filter capacitor and one end of a third group of coils of the common mode inductor are connected with each other, the other end of the first group of coils of the common mode inductor, one end of the third filter capacitor, one end of the fourth filter capacitor and one end of the operating switch are connected with each other, the other end of the operating switch is connected with the inner end of the common output wiring terminal, the other end of the second group of coils of the common mode inductor, the other end of the third filter capacitor and the inner end of the direct current output negative wiring terminal are connected with each other, and the other end of the third group of coils of the common mode inductor, the other end of the fourth filter capacitor and the inner end of the alternating current zero line output wiring terminal are connected with each other.
3. The multifunctional filter switch device for electromagnetic compatibility test according to claim 2, characterized in that: the second group of coils and the third group of coils of the common mode inductor are wound on the corresponding magnetic rings in an overlapped mode, and the second group of coils and the third group of coils of the common mode inductor are isolated through high-temperature-resistant insulating tapes.
4. A multifunctional filter switch device for electromagnetic compatibility tests according to claim 1, 2 or 3, characterized in that: the operating switch is a single-pole double-throw rocker switch.
5. A multifunctional filter switch device for electromagnetic compatibility tests according to claim 1, 2 or 3, characterized in that: the public input terminal, the direct current input negative terminal, the alternating current zero line input terminal, the public output terminal, the direct current output negative terminal and the alternating current zero line output terminal are all jack type terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123207863.0U CN216818117U (en) | 2021-12-20 | 2021-12-20 | Multifunctional filtering switch device for electromagnetic compatibility test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123207863.0U CN216818117U (en) | 2021-12-20 | 2021-12-20 | Multifunctional filtering switch device for electromagnetic compatibility test |
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| Publication Number | Publication Date |
|---|---|
| CN216818117U true CN216818117U (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123207863.0U Active CN216818117U (en) | 2021-12-20 | 2021-12-20 | Multifunctional filtering switch device for electromagnetic compatibility test |
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| CN (1) | CN216818117U (en) |
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2021
- 2021-12-20 CN CN202123207863.0U patent/CN216818117U/en active Active
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