CN203775019U - Power filter circuit - Google Patents
Power filter circuit Download PDFInfo
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- CN203775019U CN203775019U CN201420011859.8U CN201420011859U CN203775019U CN 203775019 U CN203775019 U CN 203775019U CN 201420011859 U CN201420011859 U CN 201420011859U CN 203775019 U CN203775019 U CN 203775019U
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- common mode
- differential mode
- capacitor
- differential
- inductance
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- 239000003990 capacitor Substances 0.000 claims abstract description 69
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000003985 ceramic capacitor Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Abstract
The utility model discloses a power filter circuit, which comprises a first differential mode inductor, a second differential mode inductor, a third differential mode inductor, a first differential mode capacitor, a second differential mode capacitor, a third differential mode capacitor, a first common mode capacitor, a second common mode capacitor, a third common mode capacitor, a first common mode inductor, a second common mode inductor and a third common mode inductor, wherein the first differential mode capacitor is parallelly connected with a first discharging resistor; the second differential mode capacitor is parallelly connected with a second discharging resistor; and the third differential mode capacitor is parallelly connected with a third discharging resistor. According to the power filter circuit, good insertion loss in 10KHz to 10MHz can be obtained, and the size of the filter is reduced. The power filter circuit has the advanategs of small size, high insertion loss and low cost.
Description
Technical field
The utility model relates to a kind of filter circuit, is specifically related to a kind of electric source filter circuit.
Background technology
According to GJB151A-97 " military equipment and subsystem electromagnetic emission and susceptibility require ", equipment all will carry out power line conduction transmitting test (10KHz-10MHz), and power line conduction transmitting should not exceed schemes the limiting value that CE102-1 specifies in GJB151A-97.380VAC phase three-wire three 50Hz-7000W fast charge equipment is mainly humorous wave interference, the interference that has the DC/DC rectifier power source of rectifier switch pipe and device interior to produce.So just require power-supply filter will have higher insertion loss in the time of low frequency.Differential mode in circuit of the prior art suppresses to be mainly derived from electric capacity, and in order to obtain higher low frequency insertion loss, we just need to increase electric capacity and meet.But the problem such as fail safe, power consumption loss of considering filter, requires differential mode capacitor can not select large magnitude electric capacity.So just cause existing filter circuit to have that filtering volume is large, cost is high, the shortcoming of the difficult realization of technique.So fast charge equipment in the past, in the time doing EMC test, can not meet EMC Requirements substantially.
Utility model content
The utility model has overcome the deficiencies in the prior art, provides a kind of 380VAC of making phase three-wire three 50Hz-7000W fast charge equipment in meeting functional performance, also can meet the electric source filter circuit of EMC Requirements.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
A kind of electric source filter circuit, comprises the first differential mode inductance, the second differential mode inductance, the 3rd differential mode inductance, the first differential mode capacitor, the second differential mode capacitor, the 3rd differential mode capacitor, the first common mode capacitance, the second common mode capacitance, the 3rd common mode capacitance, the first common mode inductance, the second common mode inductance, the 3rd common mode inductance; The first described differential mode inductance is connected with one end of the first differential mode capacitor, and the other end of described the first differential mode capacitor is connected with described the second differential mode capacitor; Described the second differential mode inductance is connected with described second differential mode capacitor one end, and the described second differential mode capacitor other end is connected with the first differential mode capacitor other end, is connected with described the 3rd differential mode capacitor simultaneously; Described the 3rd differential mode inductance is connected with described the 3rd differential mode capacitor one end, and the other end of described the 3rd differential mode capacitor is connected with the described second differential mode capacitor other end and the first differential mode capacitor other end simultaneously; Described first common mode capacitance one end is connected with described the first common mode inductance; The described first common mode capacitance other end is connected with described the second common mode capacitance; Described second common mode capacitance one end is connected with described the second common mode inductance, and the second common mode capacitance other end is connected with the first common mode capacitance other end and the 3rd common mode capacitance and ground connection simultaneously; Described the 3rd common mode capacitance is connected with described the 3rd common mode inductance; Described the first differential mode inductance is connected with described first common mode capacitance one end and the first common mode inductance; Described the second differential mode inductance is connected with described second common mode capacitance one end and the second common mode inductance; Described the 3rd differential mode inductance is connected with described the 3rd common mode capacitance one end and the 3rd common mode inductance.
Further technical scheme is the first differential mode capacitor first discharge resistance in parallel.
Further technical scheme is the second differential mode capacitor second discharge resistance in parallel.
Further technical scheme is the 3rd differential mode capacitor the 3rd discharge resistance in parallel.
Further technical scheme is the first differential mode capacitor first discharge resistance in parallel, the second differential mode capacitor second discharge resistance in parallel, and the 3rd differential mode capacitor the 3rd discharge resistance in parallel or the second differential mode capacitor second discharge resistance in parallel, and the 3rd differential mode capacitor the 3rd discharge resistance in parallel.
Further technical scheme is that the first common mode capacitance, the second common mode capacitance, the 3rd common mode capacitance are all ceramic capacitors.
Further technical scheme is that the magnetic core of the first common mode inductance, the second common mode inductance, the 3rd common mode inductance is all amorphous nanometer crystal alloy magnets.
Compared with prior art, the beneficial effects of the utility model are: the utility model not only obtains good insertion loss at 10KHz-10MHz, also can reduce filter volume simultaneously.The utility model power-supply filter volume is little, insertion loss is high, cost is low.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of an embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, Fig. 1 illustrates the circuit theory diagrams of an embodiment of the utility model.The present embodiment electric source filter circuit, comprises the first differential mode inductance L1, the second differential mode inductance L2, the 3rd differential mode inductance L3, the first differential mode capacitor C1, the second differential mode capacitor C2, the 3rd differential mode capacitor C3, the first common mode capacitance C4, the second common mode capacitance C5, the 3rd common mode capacitance C6, the first common mode inductance L4, the second common mode inductance L5, the 3rd common mode inductance L6; The three piece input lines of circuit including L1, L2, L3, from input IN input signal, pass through differential mode filter circuit and common mode filtering circuit successively, from common mode filtering circuit output OUT.The first differential mode inductance is connected with one end of the first differential mode capacitor, and the other end of the first differential mode capacitor is connected with the second differential mode capacitor; The second differential mode inductance is connected with second differential mode capacitor one end, and the second differential mode capacitor other end is connected with the first differential mode capacitor other end, is connected with the 3rd differential mode capacitor simultaneously; The 3rd differential mode inductance is connected with the 3rd differential mode capacitor one end, and the other end of the 3rd differential mode capacitor is connected with the second differential mode capacitor other end and the first differential mode capacitor other end simultaneously; In the present embodiment, take star connection that the voltage at differential mode capacitor two ends is down to below 250VAC, reduced the volume of electric capacity.First common mode capacitance one end is connected with the first common mode inductance; The first common mode capacitance other end is connected with the second common mode capacitance; Second common mode capacitance one end is connected with the second common mode inductance, and the second common mode capacitance other end is connected with the first common mode capacitance other end and the 3rd common mode capacitance and ground connection simultaneously; The 3rd common mode capacitance is connected with the 3rd common mode inductance; The first differential mode inductance is connected with first common mode capacitance one end and the first common mode inductance; The second differential mode inductance is connected with second common mode capacitance one end and the second common mode inductance; The 3rd differential mode inductance is connected with the 3rd common mode capacitance one end and the 3rd common mode inductance.As preferred embodiment, each differential mode capacitor can a discharge resistance in parallel, the first differential mode capacitor first discharge resistance R1 in parallel in the present embodiment, the second differential mode capacitor second discharge resistance R2 in parallel, and the 3rd differential mode capacitor a 3rd discharge resistance R3 in parallel; The effective support equipment of discharge resistance stops the discharge process of rear electric capacity.As preferred embodiment, in the present embodiment, the first common mode capacitance C4, the second common mode capacitance C5, the 3rd common mode capacitance C6, the first common mode inductance L4, the second common mode inductance L5, the 3rd common mode inductance L6 are common mode inhibition device.The first common mode capacitance C4, the second common mode capacitance C5, the 3rd common mode capacitance C6 are the ceramic capacitors of small volume.The first common mode inductance L4, the second common mode inductance L5, the 3rd common mode inductance L6 need to have larger common mode inhibition capacity, and preferred embodiment is that inductance core is amorphous nanometer crystal alloy magnet.
" embodiment ", " another embodiment ", " embodiment " that spoken of in this manual, etc., refer to specific features, structure or the feature described in conjunction with this embodiment and be included at least one embodiment that the application's generality describes.In specification, multiple local appearance statement of the same race is not necessarily to refer to same embodiment.Furthermore, while describing a specific features, structure or feature in conjunction with any embodiment, what advocate is to realize this feature, structure or feature in conjunction with other embodiment also to drop in scope of the present utility model.
Although the utility model is described with reference to the multiple explanatory embodiment of utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and execution modes, within these amendments and execution mode will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to the building block of subject combination layout and/or layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (7)
1. an electric source filter circuit, comprises the first differential mode inductance, the second differential mode inductance, the 3rd differential mode inductance, the first differential mode capacitor, the second differential mode capacitor, the 3rd differential mode capacitor, the first common mode capacitance, the second common mode capacitance, the 3rd common mode capacitance, the first common mode inductance, the second common mode inductance, the 3rd common mode inductance; It is characterized in that: the first described differential mode inductance is connected with one end of the first differential mode capacitor, the other end of described the first differential mode capacitor is connected with described the second differential mode capacitor; Described the second differential mode inductance is connected with described second differential mode capacitor one end, and the described second differential mode capacitor other end is connected with the first differential mode capacitor other end, is connected with described the 3rd differential mode capacitor simultaneously; Described the 3rd differential mode inductance is connected with described the 3rd differential mode capacitor one end, and the other end of described the 3rd differential mode capacitor is connected with the described second differential mode capacitor other end and the first differential mode capacitor other end simultaneously; Described first common mode capacitance one end is connected with described the first common mode inductance; The described first common mode capacitance other end is connected with described the second common mode capacitance; Described second common mode capacitance one end is connected with described the second common mode inductance, and the second common mode capacitance other end is connected with the first common mode capacitance other end and the 3rd common mode capacitance and ground connection simultaneously; Described the 3rd common mode capacitance is connected with described the 3rd common mode inductance; Described the first differential mode inductance is connected with described first common mode capacitance one end and the first common mode inductance; Described the second differential mode inductance is connected with described second common mode capacitance one end and the second common mode inductance; Described the 3rd differential mode inductance is connected with described the 3rd common mode capacitance one end and the 3rd common mode inductance.
2. electric source filter circuit according to claim 1, is characterized in that the first described differential mode capacitor first discharge resistance in parallel.
3. electric source filter circuit according to claim 1 and 2, is characterized in that the second described differential mode capacitor second discharge resistance in parallel.
4. electric source filter circuit according to claim 1, is characterized in that the 3rd described differential mode capacitor the 3rd discharge resistance in parallel.
5. electric source filter circuit according to claim 3, is characterized in that the 3rd described differential mode capacitor the 3rd discharge resistance in parallel.
6. electric source filter circuit according to claim 1, is characterized in that described the first common mode capacitance, the second common mode capacitance, the 3rd common mode capacitance are all ceramic capacitors.
7. electric source filter circuit according to claim 1, is characterized in that the magnetic core of the first described common mode inductance, the second common mode inductance, the 3rd common mode inductance is all amorphous nanometer crystal alloy magnets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011859.8U CN203775019U (en) | 2014-01-08 | 2014-01-08 | Power filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011859.8U CN203775019U (en) | 2014-01-08 | 2014-01-08 | Power filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203775019U true CN203775019U (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420011859.8U Expired - Lifetime CN203775019U (en) | 2014-01-08 | 2014-01-08 | Power filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203775019U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202013A (en) * | 2014-08-21 | 2014-12-10 | 华为技术有限公司 | Active EMI (Electro-Magnetic Interference) filter and power management device |
| CN105406695A (en) * | 2014-08-27 | 2016-03-16 | 华为技术有限公司 | Switch power filtering circuit |
| CN110212753A (en) * | 2019-07-09 | 2019-09-06 | 北京元六鸿远电子科技股份有限公司 | A kind of power supply two-way filter |
-
2014
- 2014-01-08 CN CN201420011859.8U patent/CN203775019U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202013A (en) * | 2014-08-21 | 2014-12-10 | 华为技术有限公司 | Active EMI (Electro-Magnetic Interference) filter and power management device |
| CN104202013B (en) * | 2014-08-21 | 2017-03-08 | 华为技术有限公司 | A kind of active EMI filter and electric power controller |
| CN105406695A (en) * | 2014-08-27 | 2016-03-16 | 华为技术有限公司 | Switch power filtering circuit |
| CN105406695B (en) * | 2014-08-27 | 2018-03-16 | 华为技术有限公司 | A kind of Switching Power Supply filter circuit |
| CN110212753A (en) * | 2019-07-09 | 2019-09-06 | 北京元六鸿远电子科技股份有限公司 | A kind of power supply two-way filter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |
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| CX01 | Expiry of patent term |