CN209402410U - A kind of EMC filter - Google Patents
A kind of EMC filter Download PDFInfo
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- CN209402410U CN209402410U CN201920205619.4U CN201920205619U CN209402410U CN 209402410 U CN209402410 U CN 209402410U CN 201920205619 U CN201920205619 U CN 201920205619U CN 209402410 U CN209402410 U CN 209402410U
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- filter
- common mode
- emc
- magnet ring
- emc filter
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Abstract
A kind of EMC filter, including at least one EMC filter unit, the EMC filter unit include common mode magnet ring and filter capacitor plate, and the common mode magnet ring and filter capacitor plate are separately positioned at port to be filtered.Implement EMC filter described in the utility model, it has the advantages that by the way that the EMC filter unit of EMC filter is decomposed into two parts of common mode magnet ring and filter capacitor plate, the miniaturization and flexible configuration for realizing EMC filter, the problem of preferably resolving big, at high cost, the difficult realization of EMC filter volume.Further, the number of EMC filter unit can also be adjusted according to actual needs, so as to adjust the number of common mode magnet ring and filter capacitor plate, composition and capacitance, so may be implemented EMC filter structure and function it is flexible adjustable.
Description
Technical field
The utility model relates to filters, more specifically to a kind of EMC filter.
Background technique
It is dry to be also easy to produce intense electromagnetic in operating conditions such as high frequency, high pressure, high currents for switching device work in high-power converter
It disturbs, causes current transformer conduction test exceeded, need to be filtered in the main power port installation EMC filter of current transformer.Traditional
The complicated circuit network that EMC filter is made of common mode inductance, common mode capacitance and differential mode capacitor, and the main power end of current transformer
There are high voltages, high current for mouth.Therefore, EMC filter volume is big, at high cost, and hardly possible is realized.
Utility model content
The technical problem to be solved by the present invention is to, for tradition in the prior art, EMC filter volume is big,
Defect at high cost, that hardly possible is realized provides a kind of small in size, at low cost, it is easy to accomplish EMC filter.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of EMC filter, including at least
One EMC filter unit, the EMC filter unit include common mode magnet ring and filter capacitor plate, the common mode magnet ring and filtered electrical
Hold plate to be separately positioned at port to be filtered.
In EMC filter described in the utility model, the filter capacitor plate includes common mode capacitance.
In EMC filter described in the utility model, the filter capacitor plate further comprises differential mode capacitor.
In EMC filter described in the utility model, the EMC filter includes being sequentially connected in series at the end to be filtered
Multiple EMC filter units at mouthful.
In EMC filter described in the utility model, the filter capacitor plate is connected to the electricity of the port to be filtered
Between cable and ground, the common mode magnet ring is set on the cable of the port to be filtered.
In EMC filter described in the utility model, the filter capacitor plate is arranged in the port to be filtered and institute
It states between common mode magnet ring.
In EMC filter described in the utility model, common mode magnet ring setting is in the port to be filtered and described
Between filter capacitor plate.
In EMC filter described in the utility model, the EMC filter unit includes the first filter band, the second filtering
Plate and the first common mode magnet ring, first filter band and second filter band are connected to the cable of the port to be filtered in turn
Between ground, the first common mode magnet ring is set on the cable of the port to be filtered, and the first common mode magnet ring setting exists
Between first filter band and second filter band.
In EMC filter described in the utility model, the EMC filter unit is total including the second common mode magnet ring, third
Mould magnet ring and third filter band, the third filter band are connected between the cable and ground of the port to be filtered, and described second
Common mode magnet ring and the third common mode magnet ring are set on the cable of the port to be filtered, and third filter band setting is the
Between two common mode magnet rings and third common mode magnet ring.
Implement EMC filter described in the utility model, has the advantages that by filtering the EMC of EMC filter
Wave unit decomposition is two parts of common mode magnet ring and filter capacitor plate, realizes the miniaturization and flexible configuration of EMC filter, compared with
Good solves the problems, such as big, at high cost, the difficult realization of EMC filter volume.Further, it can also adjust according to actual needs
The number of EMC filter unit, so as to adjust the number of common mode magnet ring and filter capacitor plate, composition and capacitance, and then can be with
Realize the flexible adjustable of the structure and function of EMC filter.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the functional block diagram of the EMC filter of the first embodiment of the utility model；
Fig. 2 is the circuit diagram of the EMC filter of the second embodiment of the utility model；
Fig. 3 is the circuit diagram of the EMC filter of the 3rd embodiment of the utility model；
Fig. 4 is the circuit diagram of the EMC filter of the fourth embodiment of the utility model；
Fig. 5 is the circuit diagram of the EMC filter of the 5th embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 is the functional block diagram of the EMC filter of the first embodiment of the utility model.As shown in Figure 1, the utility model
EMC filter include at least one EMC filter unit 100, the EMC filter unit 100 includes common mode magnet ring 110 and filtering
Capacitor board 120.As shown in Figure 1, the common mode magnet ring 110 and filter capacitor plate 120 are separately positioned at port to be filtered.At this
In one preferred embodiment of utility model, which can be the main power port of current transformer, and being also possible to other needs
The port to be filtered for wanting EMC to filter.In a preferred embodiment of the utility model, the filter capacitor plate 120 is connected to
Between the cable and ground of the port to be filtered, the common mode magnet ring 110 is set on the cable of the port to be filtered.It is described
The front and back setting sequence of filter capacitor plate 120 and the common mode magnet ring 110 can adjust as needed, for example, institute can be designed to
It states filter capacitor plate 120 to be arranged between the port to be filtered and the common mode magnet ring 110, can also be designed to the common mode
Magnet ring 110 is arranged between the port to be filtered and the filter capacitor plate 120.In the further preferred of the utility model
In embodiment, multiple EMC filter units 100 can be arranged in series.
In a preferred embodiment of the utility model, the filter capacitor plate 120 may include at least one set of common mode
Capacitor.In another preferred embodiment of the utility model, the filter capacitor plate 120 may include at least one set of common mode electricity
Hold and at least one set of differential mode capacitor.It, can be any according to actual needs setting in other preferred embodiments of the utility model
The common mode capacitance and differential mode capacitor of suitable quantity and capacitance, such as two groups, three groups or even multiple groups.
Implement EMC filter described in the utility model, has the advantages that by filtering the EMC of EMC filter
Wave unit decomposition is two parts of common mode magnet ring and filter capacitor plate, realizes the miniaturization and flexible configuration of EMC filter, compared with
Good solves the problems, such as big, at high cost, the difficult realization of EMC filter volume.Further, can also according to actual needs, example
Such as design parameter and practical filter effect, the number of EMC filter unit is adjusted, so as to adjust common mode magnet ring and filter capacitor plate
Number, composition and capacitance, and then may be implemented EMC filter structure and function it is flexible adjustable.
Fig. 2 is the circuit diagram of the EMC filter of the second embodiment of the utility model.As shown in Fig. 2, this is practical new
The EMC filter of type includes an EMC filter unit being arranged at port to be filtered.The EMC filter unit 100 is by one
The LC type filter unit that common mode magnet ring 110 and a filter capacitor plate 120 are constituted.As shown in Fig. 2, the filter capacitor plate 120
It is connected between the cable and ground of the port to be filtered, the common mode magnet ring 110 is set in the cable of the port to be filtered
On.The filter capacitor plate 120 is arranged between the port to be filtered and the common mode magnet ring 110.In the utility model
In one preferred embodiment, the filter capacitor plate 120 may include at least one set of common mode capacitance.In the another of the utility model
In a preferred embodiment, the filter capacitor plate 120 may include at least one set of common mode capacitance and at least one set of differential mode capacitor.?
In other preferred embodiments of the utility model, the common mode electricity of any suitable quantity and capacitance can be set according to actual needs
Appearance and differential mode capacitor.
In the further preferred embodiment of the utility model, more EMC filter units, such as two can be set
EMC filter unit.Fig. 3 shows the embodiment of the LCLC multiple filter including two EMC filter units.In the utility model
Other preferred embodiments in, the EMC filter including three or more above-mentioned EMC filter units can also be set.
Implement EMC filter described in the utility model, has the advantages that by filtering the EMC of EMC filter
Wave unit decomposition is two parts of common mode magnet ring and filter capacitor plate, realizes the miniaturization and flexible configuration of EMC filter, compared with
Good solves the problems, such as big, at high cost, the difficult realization of EMC filter volume.Further, it can also adjust according to actual needs
The number of EMC filter unit, so as to adjust the number of common mode magnet ring and filter capacitor plate, composition and capacitance, and then can be with
Realize the flexible adjustable of the structure and function of EMC filter.
Fig. 4 is the circuit diagram of the EMC filter of the fourth embodiment of the utility model.As shown in figure 4, this is practical new
The EMC filter of type includes an EMC PI filter unit being arranged at port to be filtered.The EMC PI filter unit includes
Filter band 121, filter band 122 and common mode magnet ring 111.The filter band 121 and the filter band 122 be connected in turn it is described to
Between the cable and ground for filtering port, the common mode magnet ring 111 is set on the cable of the port to be filtered, the common mode magnetic
Ring 111 is arranged between the filter band 121 and the filter band 122.In a preferred embodiment of the utility model, institute
Stating filter capacitor plate 121 and 122 may include at least one set of common mode capacitance.In another preferred embodiment of the utility model
In, the filter capacitor plate 121 and 122 may include at least one set of common mode capacitance and at least one set of differential mode capacitor.It is practical at this
In other novel preferred embodiments, the common mode capacitance and difference of any suitable quantity and capacitance can be set according to actual needs
Mould capacitor.
In the further preferred embodiment of the utility model, more EMC PI filter units can be set, such as
Two EMC PI filter units, three EMC PI filter units, even more EMC PI filter units.
Implement EMC filter described in the utility model, has the advantages that by filtering the EMC of EMC filter
Wave unit decomposition is two parts of common mode magnet ring and filter capacitor plate, realizes the miniaturization and flexible configuration of EMC filter, compared with
Good solves the problems, such as big, at high cost, the difficult realization of EMC filter volume.Further, it can also adjust according to actual needs
The number of EMC filter unit, so as to adjust the number of common mode magnet ring and filter capacitor plate, composition and capacitance, and then can be with
Realize the flexible adjustable of the structure and function of EMC filter.
Fig. 5 is the circuit diagram of the EMC filter of the 5th embodiment of the utility model.As shown in figure 5, this is practical new
The EMC filter of type includes an EMC T-type filter unit being arranged at port to be filtered.The EMC T-type filter unit packet
Common mode magnet ring 112, common mode magnet ring 113 and filter band 123 are included, the filter band 123 is connected to the cable of the port to be filtered
Between ground, the common mode magnet ring 112 and the magnet ring are set on the cable of the port to be filtered, the filter band 123
It is arranged between common mode magnet ring 112 and common mode magnet ring 113.In a preferred embodiment of the utility model, the filtered electrical
Holding plate 123 may include at least one set of common mode capacitance.In another preferred embodiment of the utility model, the filter capacitor
Plate 123 may include at least one set of common mode capacitance and at least one set of differential mode capacitor.In other preferred embodiments of the utility model
In, the common mode capacitance and differential mode capacitor of any suitable quantity and capacitance can be set according to actual needs.
In the further preferred embodiment of the utility model, more EMC PI filter units can be set, such as
Two EMC T-type filter units, three EMC T-type filter units, even more EMC T-type filter units.
Implement EMC filter described in the utility model, has the advantages that by filtering the EMC of EMC filter
Wave unit decomposition is two parts of common mode magnet ring and filter capacitor plate, realizes the miniaturization and flexible configuration of EMC filter, compared with
Good solves the problems, such as big, at high cost, the difficult realization of EMC filter volume.Further, it can also adjust according to actual needs
The number of EMC filter unit, so as to adjust the number of common mode magnet ring and filter capacitor plate, composition and capacitance, and then can be with
Realize the flexible adjustable of the structure and function of EMC filter.
In the further preferred embodiment of the utility model, the EMC filter of the utility model may include multiple
EMC filter unit, these EMC filter units may be the same or different, can respectively according to any of the above described embodiments into
Row construction.Those skilled in the art can be according to the number or filtered electrical of design parameter and practical filter effect adjustment common mode magnet ring
Hold the capacitance of capacitor in the number and plate of plate.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of EMC filter, which is characterized in that including at least one EMC filter unit, the EMC filter unit includes altogether
Mould magnet ring and filter capacitor plate, the common mode magnet ring and filter capacitor plate are separately positioned at port to be filtered.
2. EMC filter according to claim 1, which is characterized in that the filter capacitor plate includes common mode capacitance.
3. EMC filter according to claim 2, which is characterized in that the filter capacitor plate further comprises differential mode electricity
Hold.
4. EMC filter according to claim 1, which is characterized in that the EMC filter includes being sequentially connected in series described
Multiple EMC filter units at port to be filtered.
5. EMC filter described in any one of -4 according to claim 1, which is characterized in that the filter capacitor plate connection
Between the cable and ground of the port to be filtered, the common mode magnet ring is set on the cable of the port to be filtered.
6. EMC filter according to claim 5, which is characterized in that the filter capacitor plate is arranged described to be filtered
Between port and the common mode magnet ring.
7. EMC filter according to claim 5, which is characterized in that the common mode magnet ring is arranged at the end to be filtered
Between mouth and the filter capacitor plate.
8. EMC filter described in any one of -4 according to claim 1, which is characterized in that the EMC filter unit includes
First filter band, the second filter band and the first common mode magnet ring, first filter band and second filter band are connected in turn
Between the cable and ground of the port to be filtered, the first common mode magnet ring is set on the cable of the port to be filtered, institute
The first common mode magnet ring is stated to be arranged between first filter band and second filter band.
9. EMC filter described in any one of -4 according to claim 1, which is characterized in that the EMC filter unit includes
Second common mode magnet ring, third common mode magnet ring and third filter band, the third filter band are connected to the electricity of the port to be filtered
Between cable and ground, the second common mode magnet ring and the third common mode magnet ring are set on the cable of the port to be filtered, institute
Third filter band is stated to be arranged between the second common mode magnet ring and third common mode magnet ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920205619.4U CN209402410U (en) | 2019-02-18 | 2019-02-18 | A kind of EMC filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920205619.4U CN209402410U (en) | 2019-02-18 | 2019-02-18 | A kind of EMC filter |
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| Publication Number | Publication Date |
|---|---|
| CN209402410U true CN209402410U (en) | 2019-09-17 |
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ID=67899279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920205619.4U Active CN209402410U (en) | 2019-02-18 | 2019-02-18 | A kind of EMC filter |
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| Country | Link |
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| CN (1) | CN209402410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490323A (en) * | 2020-05-13 | 2020-08-04 | 合肥巨一动力系统有限公司 | Integrated bus EMC filtering structure |
-
2019
- 2019-02-18 CN CN201920205619.4U patent/CN209402410U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490323A (en) * | 2020-05-13 | 2020-08-04 | 合肥巨一动力系统有限公司 | Integrated bus EMC filtering structure |
| CN111490323B (en) * | 2020-05-13 | 2021-06-25 | 合肥巨一动力系统有限公司 | Integrated bus EMC filtering structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220125 Address after: 710000 room 804, 8th floor, building 14, West Yungu phase I, Fengxi new town, Xixian new area, Xi'an, Shaanxi Patentee after: Weidi new energy Co.,Ltd. Address before: 518055 1-4, 6-10 floor, B2 building, Nanshan Zhiyuan, 1001 Nanshan District Xue Yuan Avenue, Shenzhen, Guangdong. Patentee before: VERTIV TECH Co.,Ltd. |
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| TR01 | Transfer of patent right |