CN203554279U - Novel filtering board - Google Patents
Novel filtering board Download PDFInfo
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- CN203554279U CN203554279U CN201320665390.5U CN201320665390U CN203554279U CN 203554279 U CN203554279 U CN 203554279U CN 201320665390 U CN201320665390 U CN 201320665390U CN 203554279 U CN203554279 U CN 203554279U
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- Prior art keywords
- capacitor
- common mode
- common
- filter band
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- 238000001914 filtration Methods 0.000 title abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 230000005764 inhibitory process Effects 0.000 claims description 11
- 238000009499 grossing Methods 0.000 claims description 10
- 230000035772 mutation Effects 0.000 claims description 3
- 230000001629 suppression Effects 0.000 abstract 6
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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Abstract
The embodiment of the utility model discloses a novel filtering board which includes a ZNR and a suppression capacitor C1, which are connected with an input end of a power supply in order. The two ends of the suppression capacitor C1 are connected with a common-mode inductor L1 respectively. The filtering board also includes common-mode suppression capacitors C2 and C3 and a smooth capacitor C4. The common-mode inductor L1 is connected with the common-mode suppression capacitors C2 and C3. A connection point of the common-mode suppression capacitors C2 and C3 is connected with a protective ground of the power supply. An abrupt-change current smooth inductor L2 is also arranged between the common-mode suppression capacitors C2 and C3 and the smooth capacitor C4. A discharging resistor R1 is also arranged between the smooth capacitor C4 and an output end of the power supply. The objective of the utility model is to provide the novel filtering board which is capable of filtering interference signals effectively.
Description
Technical field
The utility model relates to filter band field, relates in particular to a kind of novel filter band.
Background technology
Current high-grade household microwave oven is to do booster power by electronic switch variable frequency power supply, when microwave oven is worked, produces a large amount of electromagnetic interference, has a strong impact on the normal use of other electrical equipment; When running into lightning impulse, induced current very easily damages integrated control chip, and the current effectively filtering interference signals of general filter band of installing, and effectively eliminate lightning induction electric current, the effectively filtering interfering of microwave oven variable frequency power supply improvement filter band of developing for above problem.
Utility model content
The utility model embodiment technical problem to be solved is, a kind of novel filter band and microwave oven supply power circuit of effective filtering interference signals is provided.
Described novel filter band, comprise the piezo-resistance ZNR being connected successively with power input and suppress capacitor C 1, the two ends of described inhibition capacitor C 1 are connected with common mode inductance L 1 respectively, also comprise common mode inhibition capacitor C 2, C3 and smoothing capacity C4, described common mode inductance L1 and described common mode inhibition capacitor C 2, C3 connects, described common mode inhibition capacitor C 2, the tie point of C3 connects the protective earthing of power supply, described common mode inhibition capacitor C 2, between C3 and described smoothing capacity C4, be also connected with mutation current smoothing inductor L2, between described smoothing capacity C4 and power output end, be also provided with discharge resistance R1.
Between described piezo-resistance ZNR and power input, be also connected with fuse.
Foregoing circuit is integrated on pcb board.
The parameter of described each element is: C1: 0.1 μ F-5 μ F, C2:0.001 μ F-0.1 μ F, C3:0.001 μ F-0.1 μ F, C4:0.1 μ F-5 μ F, L1:0.5mH-30mH, L2:0.02 μ H-2mH.
Implement the utility model embodiment, there is following beneficial effect:
The utility model embodiment connects and suppresses capacitor C 1, piezo-resistance ZNR, common mode inductance L1, smoothing capacity C4, common mode inhibition capacitor C 2, C3, mutation current smoothing inductor L2, discharge resistance R1 at microwave oven supply power input.The absorption circuit that disturbance current is comprised of said elements absorbs, and coordinates with parameter the effect that suppresses microwave oven interference that reaches by rationally arranging of said elements.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment circuit theory schematic diagram.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is described in further detail.
The novel filter band of the utility model embodiment, as shown in Figure 1, microwave oven supply power is from L(IN) and N(IN) input, connect fuse FUSE, piezo-resistance ZNR in parallel and C1, connect common mode inductance L1, connect common mode capacitance C2, C3, common mode capacitance C2, the tie point of C3 connects the protective earthing of power supply, L2 is connected on L1 and output L(OUT) between, output L(OUT) and N(OUT) and meet C4 and R1, foregoing circuit is integrated on pcb board, the parameter of each element is C1: 0.1 μ F-5 μ F, C2:0.001 μ F-0.1 μ F, C3:0.001 μ F-0.1 μ F, C4:0.1 μ F-5 μ F, L1:0.5mH-30mH, L2:0.02 μ H-2mH.
Above disclosed is only a kind of preferred embodiment of the utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim, still belongs to the scope that the utility model is contained.
Claims (4)
1. a novel filter band, it is characterized in that, comprise the piezo-resistance ZNR being connected successively with power input and suppress capacitor C 1, the two ends of described inhibition capacitor C 1 are connected with common mode inductance L 1 respectively, also comprise common mode inhibition capacitor C 2, C3 and smoothing capacity C4, described common mode inductance L1 and described common mode inhibition capacitor C 2, C3 connects, described common mode inhibition capacitor C 2, the tie point of C3 connects the protective earthing of power supply, described common mode inhibition capacitor C 2, between C3 and described smoothing capacity C4, be also connected with mutation current smoothing inductor L2, between described smoothing capacity C4 and power output end, be also provided with discharge resistance R1.
2. novel filter band according to claim 1, is characterized in that, is also connected with fuse between described piezo-resistance ZNR and power input.
3. novel filter band according to claim 1, is characterized in that, foregoing circuit is integrated on pcb board.
4. novel filter band according to claim 1, it is characterized in that, the parameter of described each element is: C1: 0.1 μ F-5 μ F, C2:0.001 μ F-0.1 μ F, C3:0.001 μ F-0.1 μ F, C4:0.1 μ F-5 μ F, L1:0.5mH-30mH, L2:0.02 μ H-2mH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320665390.5U CN203554279U (en) | 2013-10-25 | 2013-10-25 | Novel filtering board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320665390.5U CN203554279U (en) | 2013-10-25 | 2013-10-25 | Novel filtering board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203554279U true CN203554279U (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320665390.5U Expired - Lifetime CN203554279U (en) | 2013-10-25 | 2013-10-25 | Novel filtering board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203554279U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048797A (en) * | 2015-06-13 | 2015-11-11 | 中山市韩科电器有限公司 | Filter circuit for electromagnetic heating of electromagnetic type heating electric cooker |
| CN106533153A (en) * | 2015-09-15 | 2017-03-22 | 广东美的生活电器制造有限公司 | Electromagnetic interference suppressing circuit of motor power and household electrical appliance |
| CN107204704A (en) * | 2016-03-18 | 2017-09-26 | 广东美的生活电器制造有限公司 | Mixer and the electromagnetic interference suppression circuit for mixer |
-
2013
- 2013-10-25 CN CN201320665390.5U patent/CN203554279U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048797A (en) * | 2015-06-13 | 2015-11-11 | 中山市韩科电器有限公司 | Filter circuit for electromagnetic heating of electromagnetic type heating electric cooker |
| CN106533153A (en) * | 2015-09-15 | 2017-03-22 | 广东美的生活电器制造有限公司 | Electromagnetic interference suppressing circuit of motor power and household electrical appliance |
| CN107204704A (en) * | 2016-03-18 | 2017-09-26 | 广东美的生活电器制造有限公司 | Mixer and the electromagnetic interference suppression circuit for mixer |
| CN107204704B (en) * | 2016-03-18 | 2020-12-22 | 广东美的生活电器制造有限公司 | Mixer and be used for electromagnetic interference suppression circuit of mixer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Beijiao town Shunde District Guangdong city Foshan province 528300 neighborhood along the river road eleven No. 25 Shunde Sanle Innovation Industry Park Patentee after: GUANGDONG SONG RESEARCH ELECTRONIC TECHNOLOGY CO.,LTD. Address before: Beijiao town Shunde District Guangdong city Foshan province 528300 neighborhood along the River Road No. 25 in two, A building third, four floor Patentee before: SONG RESEARCH ELECTRONIC TECHNOLOGY CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |