CN204578360U - A kind of modular power source of integrated common mode inductance - Google Patents
A kind of modular power source of integrated common mode inductance Download PDFInfo
- Publication number
- CN204578360U CN204578360U CN201520288994.1U CN201520288994U CN204578360U CN 204578360 U CN204578360 U CN 204578360U CN 201520288994 U CN201520288994 U CN 201520288994U CN 204578360 U CN204578360 U CN 204578360U
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- China
- Prior art keywords
- magnetic core
- common mode
- power source
- modular power
- mode inductance
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- 238000004804 winding Methods 0.000 claims abstract description 10
- 239000003292 glue Substances 0.000 claims abstract description 5
- 239000011889 copper foil Substances 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- JAYCNKDKIKZTAF-UHFFFAOYSA-N 1-chloro-2-(2-chlorophenyl)benzene Chemical compound 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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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[Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The utility model discloses a kind of modular power source of integrated common mode inductance, comprise one group of shape and the duplicate discrete magnetic core of size, one piece of PCB having a grooved bore, described PCB has one group of common mode winding.The shape of described grooved bore is identical with discrete magnetic core, and a described component founds the center pillar of magnetic core and side column is inserted in described grooved bore from the end face of PCB and bottom surface respectively.The side column that a described component founds magnetic core is connected by magnetic core glue with center pillar.It is inner at modular power source that the utility model is integrated with common mode inductance, can improve the EMI control ability of power density modular power source.For terminal applies EMC design improves portability.Have that volume is little, assembling aspect a little.
Description
Technical field
The utility model discloses a kind of modular power source of integrated common mode inductance, particularly a kind of DC-DC high power density modular power source.
Background technology
Along with the fast development of semiconductor device and very lagre scale integrated circuit (VLSIC), to big current, low-voltage, the demand of Switching Power Supply also significantly increases thereupon, therefore improves switching frequency, reduces power supply small size, improves power module power density, become the matter of utmost importance of DC-DC module power source engineer.And while improve module power switch frequency and reduction modular power source volume, the noise also corresponding increase that switch cutting inductive current produces.
Usual noise is divided into two classes, and the noise that the positive and negative two ends of power supply produce is differential mode noise, and the noise between positive negative wire and the earth is common mode noise, and differential mode noise can be decayed by differential mode filter, and common mode noise then needs common-mode filter to decay.
Fig. 1 shows the circuit theory diagrams of a DC-DC module power source EMC front end filter, and 1 is that common mode filtering circuit, 2 is for differential mode filter circuit.L1 in described common mode filtering circuit is common mode inductance.
At the common mode inductance that the technical method of traditional common mode inductance is as shown in Fig. 2-1, Fig. 2-2, adopt on a ring-like high μ value magnetic core, be wrapped on magnet ring by two enamel insulated wire same-phases.But in the modular power source application of high power or high power density, because the electric current that modular power source inputs or outputs is very large, reach a few peace even ranks of tens peaces, this just causes, and design is upper there is following puzzlement.
1, enamel insulated wire is for meeting big current, needs to select very thick line footpath, and this thick line footpath will cause adding man-hour at common mode inductance, necessary hand wound, and coiling is very difficult, even cannot coiling.
Even if 2 can coiling when, the volume of common mode inductance also will become very huge, finally can cause the bulky of whole power applications system.
3, the common mode inductance that this employing coiling is made is a kind of device of plug-in unit, cannot be applied in the higher SMT technique of automaticity.
The development of modular power source technique
Along with the development of communication, industry control technology, distributed power supply system is applied, create the demand of a lot of DC-DC module power source, and the encapsulation technology of modular power source also from before plug-in unit be encapsulated into SMT, from ceramic substrate to aluminium base technique, multi-layer PCB substrate process till now again.And multi-layer PCB substrate process is the main flow of high power density modular power source now.
Utility model content
The purpose of this utility model is to provide a kind of modular power source of integrated common mode inductance, and the utility model can overcome shortcoming of the prior art.
The purpose of this utility model is achieved through the following technical solutions:
A kind of modular power source of integrated common mode inductance, comprise a component and found magnetic core, one piece of PCB, PCB has one group of common mode winding and grooved bore, the shape of grooved bore is identical with discrete magnetic core, and the center pillar of discrete magnetic core and side column are inserted in described grooved bore from the end face of PCB and bottom surface respectively.
A described component is found magnetic core and is comprised two sizes, the duplicate magnetic core of shape.
The specification shape of described discrete magnetic core can be EE type magnetic core, PQ type magnetic core, RM type magnetic core or ER type magnetic core.
One group of described magnetic core is high permeability magnetic core.
One group of described magnetic core center pillar does not need out air gap.
Described common mode winding is one group of Copper Foil cabling coil.
One group of described Copper Foil cabling coil is two identical coils identical with the number of turns of direction of routing.
The side column of described one group of magnetic core is connected by magnetic core glue with center pillar.
The utility model is on the basis of traditional application common mode filtering technology, common mode inductance is inner from the external harmoniousness of high power density DC-DC module power source to modular power source, make full use of the multi-layer sheet technology that high power density modular power source adopts, the Copper Foil of multi-layer PCB board is designed to the coiled wire-wound coil of common mode inductance, the magnetic core of the magnet ring structure of traditional common mode inductance is made into two discrete magnetic cores that general EE, ER, PQ, RM are representative.
The utility model has following advantage:
1, volume is little.
2, easy to assembly.
Traditional common mode inductance needs the enamelled wire of the thick wire diameter of coiling, because the enamelled wire of thick wire diameter is high, not flexible due to hardness, in winding process, need very large power, and common adopted FERRITE CORE is frangible material, the difficulty of winding process is very large.The inductance that winding becomes also just can will be arranged on the PCB of filter band through the operation such as plug-in unit, wave soldering.
And common mode winding described in the utility model is directly integrated in the PCB of modular power source, as long as magnetic core is directly inserted in PCB in the course of processing, with just passable after magnetic core glue bond.
1, be integrated in modular power source inside, the EMI control ability of power density modular power source can be improved.For terminal applies EMC design improves portability.
2, the function of differential mode inductance is integrated with
Traditional common mode inductance due to magnetic core be circular ring type specification, magnetic circuit is closed, and leakage inductance is little.And the common mode inductance of the present utility model core combination that to be employing two discrete, have very little air gap between magnetic circuit, leakage inductance relatively can be large.And the leakage inductance of common mode inductance is not owing to intercoupling, so define differential mode inductance with regard to equivalence.So common mode inductance technology of the present utility model is the inductance of a common mode inductance and differential mode inductance combination in fact, it has damping capacity to common mode noise and differential mode noise simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of prior art;
Fig. 2-1 is the outline drawing of prior art common mode inductance;
Fig. 2-2 is the outline drawing of prior art common mode inductance;
Fig. 3 is outline drawing of the present utility model;
Fig. 4 is assembling schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment one
Fig. 4 shows the modular power source outline drawing of a kind of integrated common mode inductance of the utility model embodiment one.
The modular power source of described a kind of integrated common mode inductance comprises a component and founds one group of common mode winding 2 on magnetic core 1, one piece of multi-layer PCB 4 and multi-layer PCB and three grooved bore 3 on multi-layer PCB.
A described component is found magnetic core 1 and is comprised two sizes, the duplicate magnetic core of shape, and its specification shape is EE shape.
Described one group of magnetic core 1 is high μ i value magnetic core.
One group of described magnetic core 1 center pillar does not need out air gap.
One piece of described multi-layer PCB 4 is substrates of modular power source, assembles other all device on modular power source.
One piece of described multi-layer PCB 4 forgives a common mode induction areas 5.
One group of Copper Foil cabling coil 2 is comprised in described common mode inductance region 5.
One group of described Copper Foil cabling coil 5 is two identical coils identical with the number of turns of direction of routing.
PCB in described common mode inductance region 5 also forgives three grooved bore 3.
Three described its sizes of grooved bore 3 correspond to center pillar and the side column of described magnetic core 1, than the side column of magnetic core 1 and the size of center pillar slightly large.
The center pillar of one group of described magnetic core 1 and side column are inserted in three described grooved bore 3 from the end face of described multi-layer PCB 4 and bottom surface respectively.The side column of described one group of magnetic core 1 is connected by magnetic core glue with center pillar.
Beneficial effect have in summary of the invention describe, do not repeat them here.
Embodiment two
With embodiment one unlike, it is ER type magnetic core that a component founds magnetic core, and other functions and installation method are all identical with embodiment one.
Execution mode of the present utility model is not limited thereto, according to foregoing, according to ordinary technical knowledge and the customary means of this area, do not departing under the utility model above-mentioned basic fundamental thought prerequisite, fault feedback of the present utility model and treatment circuit also have other execution mode; Such as core shapes is changed into PQ type magnetic core, RM type magnetic core etc., the utility model can also make the amendment of other various ways, replacement or change, all drops within the utility model rights protection scope.
Claims (7)
1. a modular power source for integrated common mode inductance, is characterized in that: comprise a component and found magnetic core, one piece of PCB, described PCB has one group of common mode winding and grooved bore; The shape of described grooved bore is identical with side column shape with the discrete magnetic core center pillar respectively with described, and center pillar and the side column of described discrete magnetic core are inserted in described grooved bore from the end face of described PCB and bottom surface respectively, and are connected by magnetic core glue.
2. the modular power source of a kind of integrated common mode inductance according to claim 1, is characterized in that: a described component is found magnetic core and comprised two sizes, the duplicate magnetic core of shape.
3. the modular power source of a kind of integrated common mode inductance according to claim 2, is characterized in that: the shape of described discrete magnetic core can be EE type magnetic core, PQ type magnetic core, RM type magnetic core or ER type magnetic core.
4. the modular power source of a kind of integrated common mode inductance according to claim 3, is characterized in that: it is high permeability magnetic core that a described component founds magnetic core.
5. the modular power source of a kind of integrated common mode inductance according to claim 4, is characterized in that: one group of described magnetic core center pillar does not need out air gap.
6. the modular power source of a kind of integrated common mode inductance according to claim 1, is characterized in that: described common mode winding is one group of Copper Foil cabling coil.
7. the modular power source of a kind of integrated common mode inductance according to claim 6, is characterized in that: one group of described Copper Foil cabling coil is two identical coils identical with the number of turns of direction of routing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520288994.1U CN204578360U (en) | 2015-05-06 | 2015-05-06 | A kind of modular power source of integrated common mode inductance |
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| CN201520288994.1U CN204578360U (en) | 2015-05-06 | 2015-05-06 | A kind of modular power source of integrated common mode inductance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10856417B2 (en) | 2018-02-09 | 2020-12-01 | Delta Electronics (Shanghai) Co., Ltd | Power supply module used in a smart terminal and power supply module assembly structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10856417B2 (en) | 2018-02-09 | 2020-12-01 | Delta Electronics (Shanghai) Co., Ltd | Power supply module used in a smart terminal and power supply module assembly structure |
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