CN204993052U - EMC wave filter - Google Patents
EMC wave filter Download PDFInfo
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- CN204993052U CN204993052U CN201520654987.9U CN201520654987U CN204993052U CN 204993052 U CN204993052 U CN 204993052U CN 201520654987 U CN201520654987 U CN 201520654987U CN 204993052 U CN204993052 U CN 204993052U
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- harmonic
- resistance
- inductance
- snubber circuit
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Abstract
The utility model relates to a EMC wave filter, include: harmonic snubber circuit, the harmonic snubber circuit be by parallelly connected condenser and resistors, or by parallelly connected condenser, resistance and pressure -sensitive resistors, the common mode choke coil has two input terminals and two outputs, these two input terminal lug connection AC powers, in these two outputs, an output is connected harmonic snubber circuit's one end is and common port between them passes through the protective tube connection as total output terminal ACN, another output harmonic snubber circuit's the other end and an inductance, the other end of this inductance is as total output terminal ACL. This EMC wave filter structure is simplified, and components and parts reduce, and are with low costs, and the reliability improves, directly dispose and use in traditional electromagnetism stove, reach the EN55011 of european union, national standard GB4824, EN55014 standard through the test.
Description
Technical field
The utility model belongs to interference signal technical field of filtering, is specifically related to for a kind of EMC filter in the electronic product such as electromagnetic oven, microwave oven.
Background technology
In the electronic products such as electromagnetic oven, microwave oven and other electromagnetic heater; usually need to arrange EMC(electromagneticcompatibility for protection electronic product normally works) circuit; with the external electromagnetic interference that filtering is introduced from power line, simultaneously avoid product itself externally to send normal work that noise jamming affects other electronic equipments under same electromagnetic environment.The components and parts that current market electromagnetic oven is commonly used involved by EMC circuit are more, and cost is higher.
Summary of the invention
For solving the problems referred to above that in the electronic products such as electromagnetic oven, EMC circuit exists, the utility model provides a kind of and improves a kind of EMC filter, to guarantee reliability service in the electronic products such as electromagnetic oven, microwave oven and other electromagnetic heater.
The EMC filter that the utility model provides, comprising:
Harmonic absorbing circuit, this harmonic absorbing circuit is made up of the capacitor of parallel connection and resistance, or is made up of the capacitor of parallel connection, resistance and piezo-resistance;
Common mode choke, has two input terminals and two outputs, and these two input terminals directly connect AC power supplies;
In these two outputs, output connect one end of described harmonic absorbing circuit and both common port as total lead-out terminal ACN, another output connects the other end and an inductance of described harmonic absorbing circuit by protective tube (fuse), and the other end of this inductance is as total lead-out terminal ACL.
In above-mentioned EMC filter, protective tube FUSE1 chooses according to electromagnetic oven.
Described protective tube can be the current thin weak part that the Copper Foil power line on PCB is formed,
this electricitystream vulnerable area can be fused by overcurrent.
The utility model EMC filter construction simplifies, and components and parts reduce, and cost is low, and reliability improves.Directly be configured in traditional electromagnetic oven and use, the rectifier bridge BG1 of electromagnetic oven, power transformer and AC voltage sample circuit are all connected to total lead-out terminal ACL, CAN of EMC filter.
The utility model EMC filter is applied in electromagnetic oven scheme, reaches European Union EN55011, GB GB4824, EN55014 standard through test.
Accompanying drawing explanation
Fig. 1 is the EMC filter embodiment circuit diagram in the utility model electromagnetic oven.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described.
Mainly harmonic absorbing circuit and common mode choke etc. is comprised with reference to Fig. 1, embodiment E MC filter.
Harmonic absorbing circuit comprises capacitor C1, resistance R1 and piezo-resistance RZ1, and capacitor C1, resistance R1 are connected with voltage dependant parallel.
Common mode choke has two input terminals L, N, and two outputs, and two input terminals L, N directly connect AC power supplies; In two outputs, output connect one end of described harmonic absorbing circuit and both common port as total lead-out terminal ACN, another output connects the other end and the inductance L 1 of described harmonic absorbing circuit by protective tube FUSE1, and the other end of inductance L 1 is as total lead-out terminal ACL.
Fuse FUSE1 chooses according to electromagnetic oven.In this embodiment, described fuse is the current thin weak part that the Copper Foil power line on PCB is formed, and this current thin weak part can be fused by overcurrent.
Described common mode choke adopts magnet ring, on magnet ring and around two coils, the number of turns is two circles.
Described harmonic absorbing circuit also can be made up of the capacitor C1 of parallel connection and resistance R1.In harmonic absorbing circuit, piezo-resistance, capacitor and resistance parameter select same prior art.
EMC filter configuration uses in traditional electromagnetic oven, and the rectifier bridge BG1 of electromagnetic oven, power transformer and AC voltage sample circuit are all connected to total lead-out terminal ACL, CAN of EMC filter.This EMC filter is applied in electromagnetic oven, reaches European Union EN55011, GB GB4824, EN55014 standard through test.
Claims (1)
1. an EMC filter, is characterized in that, comprising:
Harmonic absorbing circuit, this harmonic absorbing circuit is made up of the capacitor of parallel connection and resistance, or is made up of the capacitor of parallel connection, resistance and piezo-resistance;
Common mode choke, has two input terminals and two outputs, and these two input terminals directly connect AC power supplies;
In these two outputs, output connect one end of described harmonic absorbing circuit and both common port as total lead-out terminal ACN, another output connects the other end and an inductance of described harmonic absorbing circuit by protective tube, and the other end of this inductance is as total lead-out terminal ACL;
Wherein, described protective tube is the current thin weak part that can be fused by overcurrent that the Copper Foil power line on PCB is formed;
Described common mode choke is two circles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520654987.9U CN204993052U (en) | 2015-08-27 | 2015-08-27 | EMC wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520654987.9U CN204993052U (en) | 2015-08-27 | 2015-08-27 | EMC wave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204993052U true CN204993052U (en) | 2016-01-20 |
Family
ID=55127376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520654987.9U Expired - Fee Related CN204993052U (en) | 2015-08-27 | 2015-08-27 | EMC wave filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204993052U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069730A (en) * | 2017-03-17 | 2017-08-18 | 珠海博翔科技有限公司 | High current is without magnetic core EMC wave filters |
| CN108023469A (en) * | 2016-10-28 | 2018-05-11 | 佛山市顺德区美的电热电器制造有限公司 | A kind of low-pass filter circuit, DC power supply and household electrical appliance |
| CN108207046A (en) * | 2016-12-19 | 2018-06-26 | 佛山市顺德区美的电热电器制造有限公司 | Surge protection circuit, electromagnetic heater and household electrical appliance |
-
2015
- 2015-08-27 CN CN201520654987.9U patent/CN204993052U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023469A (en) * | 2016-10-28 | 2018-05-11 | 佛山市顺德区美的电热电器制造有限公司 | A kind of low-pass filter circuit, DC power supply and household electrical appliance |
| CN108207046A (en) * | 2016-12-19 | 2018-06-26 | 佛山市顺德区美的电热电器制造有限公司 | Surge protection circuit, electromagnetic heater and household electrical appliance |
| CN107069730A (en) * | 2017-03-17 | 2017-08-18 | 珠海博翔科技有限公司 | High current is without magnetic core EMC wave filters |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20180827 |