CN206180980U - EMI filter - Google Patents
EMI filter Download PDFInfo
- Publication number
- CN206180980U CN206180980U CN201621172875.0U CN201621172875U CN206180980U CN 206180980 U CN206180980 U CN 206180980U CN 201621172875 U CN201621172875 U CN 201621172875U CN 206180980 U CN206180980 U CN 206180980U
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- CN
- China
- Prior art keywords
- shell
- copper bar
- electric capacity
- electromagnetic interface
- interface filter
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model provides a EMI filter, including the shell, the magnetic ring is just fixed through inside epoxy plate and shell in locating the shell, electric capacity welds on the PCB board, and the PCB board is fixed in the shell outside, the shell outside is located to input/output three -phase copper bar, and input/output three -phase copper bar is connected respectively to the lead -out wire of electric capacity. Among the EMI filter that this paper utility model provided, crucial device magnetic ring and electric capacity are unchangeable, and the magnetic ring is fixed through epoxy plate and shell, has saved dear copper bar and casting glue, and the volume reduces conventional product's 13, cost reduction to conventional product's 14, and small and exquisite volume has made things convenient for the spatial layout to the dc -to -ac converter. Simultaneously, this EMI filter does not have the difference with traditional wave filter on suppression high -frequency characteristic, produce under the prerequisite of property ability at assurance EMI filter promptly, reduced the cost of EMI filter product, and the volume dwindles while convenient to use, dependable performance greatly.
Description
Technical field
This utility model is related to a kind of low cost high power EMI filtering for being applied to photovoltaic DC-to-AC converter and big-power transducer
Device.
Background technology
In recent years, as technological progress and national policy support that the new forms of energy such as photovoltaic generation and wind-power electricity generation are obtained rapidly
Development.Fierce industry competition simultaneously, the method for promoting new forms of energy producer constantly to seek reduces cost.In field of photovoltaic power generation,
High-power inverter is drastically compressed as Primary Component, cost.Certain well-known producer 500KW inverter selling price in 2013
Up to 200,000, by 2016 90000 were fallen below.Selling price constantly reduces also requiring that respective accessory cost is optimized.
Analyze from principle, electromagnetic interface filter is suppressed using the radio-frequency component in magnet ring and capacitance on circuit, it is ensured that
Inverter does not affect the miscellaneous equipment on electrical network when working.It is standard configuration part in inverter.Traditional electromagnetic interface filter part group
Into in inventory, except the Primary Components such as magnet ring and electric capacity, the also casting glue of shell, metalfilmresistor and costliness, copper bar etc..
Fig. 1 is tradition 500KW photovoltaic DC-to-AC converter electromagnetic interface filter structural representations, and the high sizes of the wide * of long * are 586 (mm) *
300 (mm) * 160 (mm), magnet ring and electric capacity are encapsulated in shell A, are fixed by casting glue, and copper bar B is stretched out outside shell A.It is this kind of
Reliability firm in structure, but volume is big.For the 500KW photovoltaic DC-to-AC converters of main flow, because power is big, the body of matching
Product is big, and weight weight takes larger space in inverter cabinet, and cost is difficult to control to.
Therefore, how on the premise of properties of product are not reduced, the cost of product is reduced, becomes those skilled in the art's cause
Power is in the difficult problem for solving.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of how in the premise for ensureing electromagnetic interface filter properties of product
Under, reduce the cost of electromagnetic interface filter product.
In order to solve above-mentioned technical problem, the technical solution of the utility model is to provide a kind of electromagnetic interface filter, and its feature exists
In：Including shell, magnet ring is fixed located inside the shell and by internal epoxy plate and shell；Electric capacity is welded on pcb board, and PCB
Plate is fixed on housing exterior；Input and output three-phase copper bar is located at housing exterior, and the lead-out wire of electric capacity connects respectively input and output three
Phase copper bar.
Preferably, the pcb board is fixed on cover top portion.
Preferably, the magnet ring is Nanocrystalline core.
Preferably, covered by plastic protective box outside the magnetic core of the magnet ring.
Preferably, the magnetic ring inner hole is copper bar routing region.
Preferably, the electric capacity is suppression electromagnetic interference capacitor.
Preferably, the magnet ring is not directly contacted with shell, input and output three-phase copper bar.
This paper utility models are to performance and the demand of cost, a inexpensive product of exploitation for photovoltaic DC-to-AC converter.
Wherein Primary Component magnet ring and electric capacity are constant, and magnet ring is fixed by epoxy plate and shell.This design eliminates the filling of costliness
Sealing, the 1/3 of volume-diminished to conventional products, cost is reduced to the 1/4 of conventional products, and compact volume is facilitated to inversion
The space layout of device.Meanwhile, this electromagnetic interface filter is on high frequency performance is suppressed and conventional filter does not have difference, can pass through
EN55011 A1 standards.
The device that this utility model is provided overcomes the deficiencies in the prior art, before electromagnetic interface filter properties of product are ensured
Put, reduce the cost of electromagnetic interface filter product, and volume is substantially reduced, and facilitates the space layout to inverter, user
Just, dependable performance.
Description of the drawings
Fig. 1 is tradition 500KW photovoltaic DC-to-AC converter electromagnetic interface filter structural representations；(a) front view；(b) side view；
The electromagnetic interface filter structural representation that Fig. 2 is provided for the present embodiment；(a) front view；(b) side view；
The internal circuit schematic diagram of the electromagnetic interface filter that Fig. 3 is provided for the present embodiment.
Specific embodiment
With reference to specific embodiment, this utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than restriction scope of the present utility model.In addition, it is to be understood that in the content for having read this utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to this utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
The electromagnetic interface filter structural representation that Fig. 2 is provided for the present embodiment, described electromagnetic interface filter includes shell 1, magnet ring
In shell 1, and it is fixed by internal epoxy plate and shell 1；Electric capacity 2 is welded on pcb board 3, and by pcb board 3
It is fixed on the top of shell 1；The lead-out wire of electric capacity 2 connects respectively input and output three-phase copper bar 4, will be connected to the input and output three of electrical network
Phase copper bar 4 passes through shell 1.
Magnet ring selects high magnetic permeability Nanocrystalline core, is covered by plastic protective box outside magnetic core, safe and reliable.
Electric capacity selects suppression electromagnetic interference capacitor X2 and Y2 class electric capacity.
Wherein, magnet ring is fixed by internal epoxy plate and shell, copper bar cabling area when magnetic ring inner hole is structure design
Domain.Magnet ring is not in contact with each other with shell 1, input and output three-phase copper bar 4, safe and reliable.
During arrangement cabling, make itself copper bar through wave filter, do not consider further that wave filter wiring, save man-hour.It is inverse
Becoming device space layout need to only reserve less space, save the space of preciousness.
For 500KW photovoltaic DC-to-AC converter electromagnetic interface filters, the high sizes of the wide * of its long * are 160 (mm) * 197 (mm) * 198.5
(mm).The relatively conventional product of volume is substantially reduced.
The internal circuit of the electromagnetic interface filter provided with reference to Fig. 3, the present embodiment is consistent with traditional electromagnetic interface filter structure.Wherein
L1-L1 ', L2-L2 ', L3-L3 ' are three-phase copper bar, and common mode magnet ring L and CY1 electric capacity is used to suppress the high frequency common mode of more than 1MHz to make an uproar
Sound, CY1 earth terminal connected with outer casing, capacitance group CX1 and CX2 are mainly used in suppressing the differential mode noise of 150KHz~1MHz, resistance R1
Electric capacity is discharged when being used for power-off with R2, it is ensured that safety.Common mode magnet ring and electric capacity constitute filter circuit, and metalfilmresistor exists
Machine plays discharge process when stopping to electric capacity, it is ensured that safety.
This paper utility models are to performance and the demand of cost, a inexpensive product of exploitation for photovoltaic DC-to-AC converter.
Wherein Primary Component magnet ring and electric capacity are constant, and magnet ring is fixed by epoxy plate and shell.This design eliminates the sum of costliness
Casting glue, the original copper bar of client's cabinet eliminates wave filter copper bar and copper bar connection operation directly through magnet ring, and volume-diminished is arrived
The 1/3 of conventional products, cost is reduced to the 1/4 of conventional products, and compact volume facilitates the space layout to inverter.
By field measurement, this electromagnetic interface filter has good performance on high frequency performance is suppressed, and filters with tradition in performance
Device does not have difference, can pass through EN55011 A1 standards.
Claims (7)
1. a kind of electromagnetic interface filter, it is characterised in that：Including shell (1), magnet ring is in shell (1) and by internal epoxy plate
It is fixed with shell (1)；Electric capacity (2) is welded on pcb board (3), and pcb board (3) is fixed on shell (1) outside；Input and output three
Phase copper bar (4) is outside located at shell (1), and the lead-out wire of electric capacity (2) connects respectively input and output three-phase copper bar (4).
2. a kind of electromagnetic interface filter as claimed in claim 1, it is characterised in that：The pcb board (3) is fixed on shell (1) top
Portion.
3. a kind of electromagnetic interface filter as claimed in claim 1, it is characterised in that：The magnet ring is Nanocrystalline core.
4. a kind of electromagnetic interface filter as described in claim 1 or 3, it is characterised in that：By plastic protective outside the magnetic core of the magnet ring
Box is covered.
5. a kind of electromagnetic interface filter as claimed in claim 1, it is characterised in that：The magnetic ring inner hole is copper bar routing region.
6. a kind of electromagnetic interface filter as claimed in claim 1, it is characterised in that：The electric capacity is suppression electromagnetic interference capacitor.
7. a kind of electromagnetic interface filter as claimed in claim 1, it is characterised in that：The magnet ring and shell (1), input and output three
Phase copper bar (4) is not directly contacted with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621172875.0U CN206180980U (en) | 2016-10-26 | 2016-10-26 | EMI filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621172875.0U CN206180980U (en) | 2016-10-26 | 2016-10-26 | EMI filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206180980U true CN206180980U (en) | 2017-05-17 |
Family
ID=58682929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621172875.0U Active CN206180980U (en) | 2016-10-26 | 2016-10-26 | EMI filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206180980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391789A (en) * | 2019-07-30 | 2019-10-29 | 北京光华世通科技有限公司 | A kind of high current automobile filter |
-
2016
- 2016-10-26 CN CN201621172875.0U patent/CN206180980U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391789A (en) * | 2019-07-30 | 2019-10-29 | 北京光华世通科技有限公司 | A kind of high current automobile filter |
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