CN203632538U - Isolation direct-current power supply filtering module - Google Patents
Isolation direct-current power supply filtering module Download PDFInfo
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- CN203632538U CN203632538U CN201320711132.6U CN201320711132U CN203632538U CN 203632538 U CN203632538 U CN 203632538U CN 201320711132 U CN201320711132 U CN 201320711132U CN 203632538 U CN203632538 U CN 203632538U
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- isolated
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- magnetic bead
- group
- power supply
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- 238000001914 filtration Methods 0.000 title claims abstract description 26
- 238000002955 isolation Methods 0.000 title abstract 8
- 239000003990 capacitor Substances 0.000 claims abstract description 29
- 239000011324 bead Substances 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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Abstract
The utility model discloses an isolation direct-current power supply filtering module, which comprises a capacitor connected in parallel to an input port. A common mode choke is connected in series to a circuit in an input terminal of an isolation direct-current power supply module; and two windings of the common mode choke are respectively connected in series with magnetic bead groups and then are respectively connected with a positive input terminal and a negative input terminal of the isolation direct-current power supply module. Or another common mode choke is used for replacing the two magnetic bead groups and is connected in series to a circuit between another common mode choke and the positive and negative input terminals of the isolation direct-current power supply module. A group of capacitors are connected in parallel in a circuit between the two magnetic bead groups or the common mode choke and the two input terminals of the isolation direct-current power supply module; and a group of capacitors are connected in parallel between the positive input terminal and the positive output terminal of the isolation direct-current power supply module and a group of capacitors are connected in parallel between the negative input terminal and the negative output terminal of the isolation direct-current power supply module. According to the utility model, the manufacturing cost is low; the topological structure is simple; the size is small; and the apparatus and the method can be realized easily.
Description
Technical field
The utility model relates to electronic technology field product, relates in particular to a kind of isolated DC power filtering module.
Background technology
The isolated DC power filtering module of existing techniques in realizing, general design is complicated, debug difficulties, and volume is large, and cost of manufacture is high.
Utility model content
The purpose of this utility model is to provide a kind of isolated DC power filtering module, and it can overcome the defect of prior art.
For achieving the above object, the utility model is taked following design:
A kind of isolated DC power filtering module, it includes:
A capacitor, is connected in parallel on input port;
A main filter network unit, comprising: at least two common mode chokes, are connected in the circuit of isolated DC power module input mutually; Or, at least one common mode choke, series connection or be mutually connected in the circuit of isolated DC power module input, two windings that are positioned at last common mode choke are respectively connected and are connect respectively the positive and negative input of isolated DC power module after a magnetic bead group;
In main filter network unit to a group capacitor in parallel in the circuit between two inputs of isolated DC power module;
A group capacitor in parallel between the positive input terminal of isolated DC power module and positive output end, simultaneously a group capacitor in parallel between the negative input end of isolated DC power module and negative output terminal.
In described isolated DC power filtering module, described magnetic bead group is at least a magnetic bead, and when magnetic bead is when more than two, between each magnetic bead, series connection or parallel with one another or connection in series-parallel coexist mutually.
In described isolated DC power filtering module, the magnetic bead quantity in two described magnetic bead groups and connected mode be equity mutually.
In described isolated DC power filtering module, an in parallel group capacitor and simultaneously between the negative input end of isolated DC power module and negative output terminal in a group capacitor in parallel between the described positive input terminal at isolated DC power module and positive output end, the capacitor of each group is at least one, and respectively organizes quantity, capacitance and the connected mode equity mutually of electric capacity.
The utility model has the advantages that: circuit structure is simple, debug simple and easy; Parts are few, and volume is little, and cost of manufacture is cheap; Can reach excellent effect to the filter effect of isolated DC power supply.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model isolated DC power filtering module embodiment 1.
Fig. 2 is the circuit theory diagrams of the utility model isolated DC power filtering module embodiment 2.
Below in conjunction with drawings and the specific embodiments, the utility model is described further.
Embodiment
Shown in Figure 1, it is the circuit theory schematic diagram of a preferred embodiment of the utility model isolated DC power filtering module, includes:
A capacitor C1, is connected in parallel on the input port of the utility model isolated DC power filtering module circuit, and the effect of this capacitor C1 can suppress low-frequency noise.
A common mode choke L1, is connected in the circuit of isolated DC power module input; After the each series connection of two windings one magnetic bead group FB1, the FB2 of common mode choke L1, connect respectively positive and negative two inputs of isolated DC power module 100; In this technical scheme, in described magnetic bead group FB1 and magnetic bead group FB2, can be all a magnetic bead, also multiple magnetic beads, in series or in parallel with each other between multiple magnetic beads, and the magnetic bead quantity in two magnetic bead group FB1, FB2 and connected mode must equities.It,, as a main filter network unit, can suppress and absorbing high-frequency noise.
To the circuit of the positive and negative input of isolated DC power module, distinguish two capacitor C2, C3(in parallel as a capacitor group at magnetic bead group FB1, FB2); Between the positive and negative a pair of input of isolated DC power module and output, shunt capacitor C4, C5(can be one or a capacitor group respectively).This unit group can suppress low-frequency noise and the high-frequency noise of isolated DC power module self.
In the utility model isolated DC power filtering module design, a group capacitor C4 in parallel between the described positive input terminal at isolated DC power module and positive output end, a simultaneously group capacitor C5 in parallel between the negative input end of isolated DC power module and negative output terminal, each group capacitor is at least one, and respectively organizes quantity, capacitance and the connected mode equity mutually of electric capacity.
Fig. 1 shows the more excellent structure of a typical case of the utility model isolated DC power filtering module, in this embodiment: only need to adopt 1 common mode choke, 2 magnetic beads, 5 capacitors, just can suppress the interference noise of isolated DC power module.
Fig. 2 shows another typical structure of the utility model isolated DC power filtering module, in this scheme: substituted magnetic bead group FB1, FB2 with 1 common mode choke; It needs to adopt 2 common mode chokes, and 5 capacitors just can suppress the interference noise of isolated DC power module, and the volume of the isolated DC power filtering module shown in Fig. 2 is larger than the volume shown in Fig. 1.
The isolated DC power filtering module that the utility model is realized, to utilize on market ripe, common electronic devices and components to build, other isolated DC power filtering module relatively, the utility model isolated DC power filtering module is cheap for manufacturing cost, topological structure is simple, volume is little, easily realizes.Checking by experiment, for dissimilar the utility model isolated DC power filtering module, can meet CLASS A(industrial level in electromagnetic compatibility conduction test) requirement, if parameter, rationally distributed, can meet the civilian grade of CLASS B() requirement, there is good compatibility.
The various embodiments described above can not depart from some variations in addition under scope of the present utility model, thus above explanation comprise should be considered as exemplary, but not the protection range of applying for a patent in order to limit the utility model.
Claims (4)
1. an isolated DC power filtering module, is characterized in that including:
A capacitor, is connected in parallel on input port;
A main filter network unit, comprising: at least two common mode chokes, are connected in the circuit of isolated DC power module input mutually; Or, at least one common mode choke, series connection or be mutually connected in the circuit of isolated DC power module input, two windings that are positioned at last common mode choke are respectively connected and are connect respectively the positive and negative input of isolated DC power module after a magnetic bead group;
In main filter network unit to a group capacitor in parallel in the circuit between two inputs of isolated DC power module;
A group capacitor in parallel between the positive input terminal of isolated DC power module and positive output end, simultaneously a group capacitor in parallel between the negative input end of isolated DC power module and negative output terminal.
2. isolated DC power filtering module according to claim 1, is characterized in that: described magnetic bead group is at least a magnetic bead, and when magnetic bead is when more than two, between each magnetic bead, series connection or parallel with one another or connection in series-parallel coexist mutually.
3. isolated DC power filtering module according to claim 1, is characterized in that: the magnetic bead quantity in two described magnetic bead groups and connected mode be equity mutually.
4. isolated DC power filtering module according to claim 1, it is characterized in that: an in parallel group capacitor and simultaneously between the negative input end of isolated DC power module and negative output terminal in a group capacitor in parallel between the described positive input terminal at isolated DC power module and positive output end, the capacitor of each group is at least one, and respectively organizes quantity, capacitance and the connected mode equity mutually of electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320711132.6U CN203632538U (en) | 2013-11-12 | 2013-11-12 | Isolation direct-current power supply filtering module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320711132.6U CN203632538U (en) | 2013-11-12 | 2013-11-12 | Isolation direct-current power supply filtering module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632538U true CN203632538U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320711132.6U Expired - Lifetime CN203632538U (en) | 2013-11-12 | 2013-11-12 | Isolation direct-current power supply filtering module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607106A (en) * | 2013-11-12 | 2014-02-26 | 巴可伟视(北京)电子有限公司 | Isolation direct-current power supply filtering module and method thereof |
-
2013
- 2013-11-12 CN CN201320711132.6U patent/CN203632538U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607106A (en) * | 2013-11-12 | 2014-02-26 | 巴可伟视(北京)电子有限公司 | Isolation direct-current power supply filtering module and method thereof |
| CN103607106B (en) * | 2013-11-12 | 2016-05-11 | 巴可伟视(北京)电子有限公司 | A kind of isolated DC power filtering module and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |