CN205004950U - A magnetic screen switch for thing networking - Google Patents
A magnetic screen switch for thing networking Download PDFInfo
- Publication number
- CN205004950U CN205004950U CN201520625888.8U CN201520625888U CN205004950U CN 205004950 U CN205004950 U CN 205004950U CN 201520625888 U CN201520625888 U CN 201520625888U CN 205004950 U CN205004950 U CN 205004950U
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- circuit
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- triode
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- magnetic screen
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Abstract
The utility model relates to an electronic switch technical field, specifically speaking relates to a magnetic screen switch for thing networking. The utility model discloses a EMC circuit connects gradually, a rectification circuit, reduction voltage circuit and switch circuit, wherein, the EMC circuit includes transformer L1, the zero line input of EMC circuit passes through primary coil of transformer L1 and is connected with one of them input electricity of rectifier circuit, the firewire input port of EMC circuit passes through transformer L1's secondary coil and is connected with another input electricity of rectifier circuit, be connected with inductance L2 between firewire input port and primary coil, be connected with electric capacity CX2 between inductance L2's output and the zero line input. The utility model discloses a EMC circuit carries out the anti -interference of preceding stage and filtering is handled, effectual assurance control switch normal use.
Description
Technical field
The utility model relates to electronic switching technology field, specifically, relates to a kind of magnetic screen switch for Internet of Things.
Background technology
Along with the development of Internet of Things, electronic technology, network technology and digital circuit obtain very large development, in technology of Internet of things, applying more is Internet of Things electronic switch, and Internet of Things electronic switch in use, often occurs the problem of distorted signals, diamagnetism mainly due to digital circuit is poor, the electronic equipment sended over when there being multiple control signal and have radiation larger near time, the frequent distortion of control signal, therefore design a kind of can the magnetic screen switch of electromagnetism interference.
Utility model content
The purpose of this utility model is to solve the deficiencies in the prior art, and provide a kind of magnetic screen switch for Internet of Things, this switch can electromagnetism interference.
The technical solution adopted in the utility model is:
A kind of magnetic screen switch for Internet of Things, comprise and connect EMC circuit, rectification circuit, reduction voltage circuit and switching circuit successively, wherein, EMC circuit comprises transformer L1, the zero line input of EMC circuit is electrically connected with one of them input of rectification circuit by primary coil of transformer L1, the live wire input of EMC circuit is electrically connected with another input of rectification circuit by the secondary coil of transformer L1, be connected with inductance L 2 between live wire input and primary coil, between the output of inductance L 2 and zero line input, be connected with electric capacity CX2.
Electric capacity CX2 is parallel with electric capacity CY1, electric capacity CY2, and electric capacity CY1, electric capacity CY2 connect, and the link ground connection of electric capacity CY1 and electric capacity CY2.
Rectification circuit is full bridge rectifier.
Reduction voltage circuit is pfc circuit.
Be provided with filter circuit between two inputs of full bridge rectifier, filter circuit comprises electric capacity CX1, and electric capacity CX1 is parallel with resistance R1, resistance R2; And resistance R1, resistance R2 connect.
The output of full bridge rectifier is by electric capacity C1 ground connection.
Further, switching circuit comprises triode Q1, triode Q2 and field effect transistor Q3; The base stage of triode Q1 is connected with control end signal by resistance R3, the collector electrode of triode Q1 is connected with the input end signal of switching circuit by resistance R7, the collector electrode of triode Q1 is connected with the base stage of triode Q2 by resistance R6, the emitter of triode Q1, the equal ground connection of emitter of triode Q2; The collector electrode of triode Q2 is connected with the input end signal of switching circuit by resistance R4, and the G pole of field effect transistor Q3 is connected with the collector electrode of triode Q2 by resistance R5, and the S pole of field effect transistor Q3 is connected with the input end signal of switching circuit; The output of the D pole connecting valve circuit of field effect transistor Q3.
Further, the output of switching circuit is by electric capacity C3 ground connection.
The beneficial effects of the utility model are: the utility model adopts EMC circuit to carry out the anti-interference of prime and filtering process, and effective guarantee control switch normally uses.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Description of reference numerals:
1---EMC circuit 2---switching circuit.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the utility model is further described.
Embodiment 1: see accompanying drawing 1.
A kind of magnetic screen switch for Internet of Things, comprise and connect EMC circuit 1, rectification circuit, reduction voltage circuit and switching circuit 2 successively, wherein, EMC circuit 1 comprises transformer L1, the zero line input of EMC circuit 1 is electrically connected with one of them input of rectification circuit by primary coil of transformer L1, the live wire input of EMC circuit 1 is electrically connected with another input of rectification circuit by the secondary coil of transformer L1, be connected with inductance L 2 between live wire input and primary coil, between the output of inductance L 2 and zero line input, be connected with electric capacity CX2.
In the technical program, shielded by design EMC circuit 1 pair of electromagnetism, the former secondary coil of transformer is eliminated common-mode signal.Switching circuit 2 is avoided to be subject to electromagnetic interference.Meanwhile, inductance L 2, electric capacity CX2 form filter circuit, eliminate the background signal in early stage, suppress interference further.
Electric capacity CX2 is parallel with electric capacity CY1, electric capacity CY2, and electric capacity CY1, electric capacity CY2 connect, and the link ground connection of electric capacity CY1 and electric capacity CY2.
Further, rectification circuit is full bridge rectifier.Reduction voltage circuit is pfc circuit, also can be transformer.Full bridge rectifier, pfc circuit are prior art, easy to use.
Be provided with filter circuit between two inputs of full bridge rectifier, filter circuit comprises electric capacity CX1, and electric capacity CX1 is parallel with resistance R1, resistance R2; And resistance R1, resistance R2 connect.
Design filter circuit can be anti-interference further.And the output of full bridge rectifier is by electric capacity C1 ground connection.
Further, switching circuit 2 comprises triode Q1, triode Q2 and field effect transistor Q3; The base stage of triode Q1 is connected with control end signal by resistance R3, the collector electrode of triode Q1 is connected with the input end signal of switching circuit 2 by resistance R7, the collector electrode of triode Q1 is connected with the base stage of triode Q2 by resistance R6, the emitter of triode Q1, the equal ground connection of emitter of triode Q2; The collector electrode of triode Q2 is connected with the input end signal of switching circuit 2 by resistance R4, and the G pole of field effect transistor Q3 is connected with the collector electrode of triode Q2 by resistance R5, and the S pole of field effect transistor Q3 is connected with the input end signal of switching circuit 2; The output of the D pole connecting valve circuit 2 of field effect transistor Q3.
When this switching circuit 2 works, send a low level signal POW_EN by control end to the base stage of triode Q1, triode Q1 ends; Now triode Q2 conducting, the G pole of field effect transistor Q3 obtains triode Q2 collector voltage, is low level; Field effect transistor Q3 conducting, thus externally export.Control externally to export by control end.When control end sends a high level signal POW_EN, triode Q1 conducting to the base stage of triode Q1, the base stage of triode Q2 obtains triode Q1 collector voltage, and be low-voltage, triode Q2 ends; The G pole of field effect transistor Q3 is identical with S electrode potential, and field effect transistor Q3 ends.Externally exported by control end control switch circuit 2.
Further, the output VDD of switching circuit 2 is by electric capacity C3 ground connection.
Arrange electric capacity C3, the electric current that can externally export carries out filtering.
The utility model has been done to explain, and those of ordinary skill in the art should be appreciated that and can modify to the technical solution of the utility model or equivalent replacement, and does not depart from essence and the scope of technical solutions of the utility model.
Claims (7)
1. the magnetic screen switch for Internet of Things, it is characterized in that: comprise and connect EMC circuit, rectification circuit, reduction voltage circuit and switching circuit successively, wherein, EMC circuit comprises transformer L1, the zero line input of EMC circuit is electrically connected with one of them input of rectification circuit by primary coil of transformer L1, the live wire input of EMC circuit is electrically connected with another input of rectification circuit by the secondary coil of transformer L1, be connected with inductance L 2 between live wire input and primary coil, between the output of inductance L 2 and zero line input, be connected with electric capacity CX2; Switching circuit comprises triode Q1, triode Q2 and field effect transistor Q3; The base stage of triode Q1 is connected with control end signal by resistance R3, the collector electrode of triode Q1 is connected with the input end signal of switching circuit by resistance R7, the collector electrode of triode Q1 is connected with the base stage of triode Q2 by resistance R6, the emitter of triode Q1, the equal ground connection of emitter of triode Q2; The collector electrode of triode Q2 is connected with the input end signal of switching circuit by resistance R4, and the G pole of field effect transistor Q3 is connected with the collector electrode of triode Q2 by resistance R5, and the S pole of field effect transistor Q3 is connected with the input end signal of switching circuit; The output of the D pole connecting valve circuit of field effect transistor Q3.
2. a kind of magnetic screen switch for Internet of Things according to claim 1, it is characterized in that: electric capacity CX2 is parallel with electric capacity CY1, electric capacity CY2, electric capacity CY1, electric capacity CY2 connect, and the link ground connection of electric capacity CY1 and electric capacity CY2.
3. a kind of magnetic screen switch for Internet of Things according to claim 2, is characterized in that: rectification circuit is full bridge rectifier.
4. a kind of magnetic screen switch for Internet of Things according to claim 3, is characterized in that: reduction voltage circuit is pfc circuit.
5. a kind of magnetic screen switch for Internet of Things according to claim 4, is characterized in that: be provided with filter circuit between two inputs of full bridge rectifier, filter circuit comprises electric capacity CX1, and electric capacity CX1 is parallel with resistance R1, resistance R2; And resistance R1, resistance R2 connect.
6. a kind of magnetic screen switch for Internet of Things according to claim 5, is characterized in that: the output of full bridge rectifier is by electric capacity C1 ground connection.
7. a kind of magnetic screen switch for Internet of Things according to claim 1, is characterized in that: the output of switching circuit is by electric capacity C3 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520625888.8U CN205004950U (en) | 2015-08-19 | 2015-08-19 | A magnetic screen switch for thing networking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520625888.8U CN205004950U (en) | 2015-08-19 | 2015-08-19 | A magnetic screen switch for thing networking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205004950U true CN205004950U (en) | 2016-01-27 |
Family
ID=55161820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520625888.8U Expired - Fee Related CN205004950U (en) | 2015-08-19 | 2015-08-19 | A magnetic screen switch for thing networking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205004950U (en) |
-
2015
- 2015-08-19 CN CN201520625888.8U patent/CN205004950U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160127 Termination date: 20180819 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |