CN202362376U - Voltage loop signal processing circuit of three-phase electronic type electric energy meter - Google Patents
Voltage loop signal processing circuit of three-phase electronic type electric energy meter Download PDFInfo
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- CN202362376U CN202362376U CN2011204845530U CN201120484553U CN202362376U CN 202362376 U CN202362376 U CN 202362376U CN 2011204845530 U CN2011204845530 U CN 2011204845530U CN 201120484553 U CN201120484553 U CN 201120484553U CN 202362376 U CN202362376 U CN 202362376U
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Abstract
The utility model discloses a voltage loop signal processing circuit of a three-phase electronic type electric energy meter. The voltage loop signal processing circuit comprises four input ends LA, LB, LC and LN, four output ends VA, VB, VC and REF, a plurality of magnetic beads, piezoresistors, resistors and capacitors, wherein the magnetic bead L4 is connected between the resistor R1 and the output end VA, the magnetic bead L5 is connected between the resistor R3 and the output end VB, the magnetic bead L6 is connected between the resistor R5 and the output end VC; and the magnetic beads can effectively inhibit high-frequency interference on a circuit, and the magnetic bead L4 additionally arranged between the resistor R1 and the first output end VA, the magnetic bead L5 additionally arranged between the resistor R3 and the output end VB, and the magnetic bead L6 additionally arranged between the resistor R5 and the output end VC can effectively improve anti-interference capability of the voltage loop signal processing circuit.
Description
Technical field
The utility model relates to a kind of voltage circuit signal processing circuit of three phases electronic energy meter.
Background technology
Electronic electric energy meter generally all adopts Digital Electronic Technique to measure, and along with science and technology development, the speed of digital circuit is more and more faster, and function is more and more stronger, and electric energy meter is also increasingly high to jamproof requirement.
The voltage circuit signal processing circuit of existing a kind of three phases electronic energy meter like Fig. 1, comprises four input end LA, LB, LC, LN and four output terminal VA, VB, VC, REF; Be serially connected with magnetic bead L101 and resistance R 101 between input end LA and the output terminal VA successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR101, capacitor C 101, capacitor C 201 and resistance R 201; The other end of voltage dependent resistor (VDR) VAR101 is connected with input end LA; The other end of capacitor C 101 is connected between magnetic bead L101 and the resistance R 101, and the other end of capacitor C 201 and resistance R 201 all is connected with output terminal VA, is connected with a capacitor C 301 between output terminal VA and the output terminal REF; Be serially connected with magnetic bead L201 and resistance R 301 between input end LB and the output terminal VB successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR201, capacitor C 401, capacitor C 501 and resistance R 401; The other end of voltage dependent resistor (VDR) VAR201 is connected with input end LB; The other end of capacitor C 401 is connected between magnetic bead L201 and the resistance R 301, and the other end of capacitor C 501 and resistance R 401 all is connected with output terminal VB, is connected with a capacitor C 601 between output terminal VB and the output terminal REF; Be serially connected with magnetic bead L301 and resistance R 501 between input end LC and the output terminal VC successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR301, capacitor C 701, capacitor C 801 and resistance R 601; The other end of voltage dependent resistor (VDR) VAR301 is connected with input end LC; The other end of capacitor C 701 is connected between magnetic bead L301 and the resistance R 501, and the other end of capacitor C 801 and resistance R 601 all is connected with output terminal VC, is connected with a capacitor C 901 between output terminal VC and the output terminal REF.The problem that exists is: the antijamming capability of the voltage circuit signal processing circuit of the three phases electronic energy meter of this structure is not strong.
The utility model content
The utility model technical matters to be solved is: the voltage circuit signal processing circuit that the strong three phases electronic energy meter of a kind of antijamming capability is provided.
The utility model addresses the above problem the technical scheme that is adopted: a kind of voltage circuit signal processing circuit of three phases electronic energy meter comprises four input end LA, LB, LC, LN and four output terminal VA, VB, VC, REF; Be serially connected with magnetic bead L1 and resistance R 1 between input end LA and the output terminal VA successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR1, capacitor C 1, capacitor C 2 and resistance R 2; The other end of voltage dependent resistor (VDR) VAR1 is connected with input end LA; The other end of capacitor C 1 is connected between magnetic bead L1 and the resistance R 1, and the other end of capacitor C 2 and resistance R 2 all is connected with output terminal VA, is connected with a capacitor C 3 between output terminal VA and the output terminal REF; Be serially connected with magnetic bead L2 and resistance R 3 between input end LB and the output terminal VB successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR2, capacitor C 4, capacitor C 5 and resistance R 4; The other end of voltage dependent resistor (VDR) VAR2 is connected with input end LB; The other end of capacitor C 4 is connected between magnetic bead L2 and the resistance R 3, and the other end of capacitor C 5 and resistance R 4 all is connected with output terminal VB, is connected with a capacitor C 6 between output terminal VB and the output terminal REF; Be serially connected with magnetic bead L3 and resistance R 5 between input end LC and the output terminal VC successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR3, capacitor C 7, capacitor C 8 and resistance R 6; The other end of voltage dependent resistor (VDR) VAR3 is connected with input end LC; The other end of capacitor C 7 is connected between magnetic bead L3 and the resistance R 5, and the other end of capacitor C 8 and resistance R 6 all is connected with output terminal VC, is connected with a capacitor C 9 between output terminal VC and the output terminal REF; Also be connected with a magnetic bead L4 between described resistance R 1 and the output terminal VA; Also be connected with a magnetic bead L5 between described resistance R 3 and the output terminal VB; Also be connected with a magnetic bead L6 between described resistance R 5 and the output terminal VC.
Compared with prior art; The advantage of the utility model is: magnetic bead can effectively suppress the high frequency interference on the circuit, and magnetic bead L5 that between the magnetic bead L4, resistance R 3 and the output terminal VB that increase between the resistance R 1 and the first output terminal VA, increases and the magnetic bead L6 that between resistance R 5 and output terminal VC, increases can improve the antijamming capability of circuit effectively.
Description of drawings
Fig. 1 is the circuit diagram of the voltage circuit signal processing circuit of existing a kind of three phases electronic energy meter.
Fig. 2 is the circuit diagram of the voltage circuit signal processing circuit of the utility model three phases electronic energy meter.
Embodiment
Embodiment to the utility model further describes below in conjunction with accompanying drawing.
As shown in Figure 2; The voltage circuit signal processing circuit of the utility model three phases electronic energy meter; Comprise four input end LA, LB, LC, LN and four output terminal VA, VB, VC, REF; Input end LA, LB, LC connect with the line end mutually of generator, and input end LN is connected with the zero line side of generator, and four output terminal VA, VB, VC, REF are connected with follow-up sampled signal treatment circuit; Be serially connected with magnetic bead L1 and resistance R 1 between input end LA and the output terminal VA successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR1, capacitor C 1, capacitor C 2 and resistance R 2; The other end of voltage dependent resistor (VDR) VAR1 is connected with input end LA; The other end of capacitor C 1 is connected between magnetic bead L1 and the resistance R 1, and the other end of capacitor C 2 and resistance R 2 all is connected with output terminal VA, is connected with a capacitor C 3 between output terminal VA and the output terminal REF; Be serially connected with magnetic bead L2 and resistance R 3 between input end LB and the output terminal VB successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR2, capacitor C 4, capacitor C 5 and resistance R 4; The other end of voltage dependent resistor (VDR) VAR2 is connected with input end LB; The other end of capacitor C 4 is connected between magnetic bead L2 and the resistance R 3, and the other end of capacitor C 5 and resistance R 4 all is connected with output terminal VB, is connected with a capacitor C 6 between output terminal VB and the output terminal REF; Be serially connected with magnetic bead L3 and resistance R 5 between input end LC and the output terminal VC successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR3, capacitor C 7, capacitor C 8 and resistance R 6; The other end of voltage dependent resistor (VDR) VAR3 is connected with input end LC; The other end of capacitor C 7 is connected between magnetic bead L3 and the resistance R 5, and the other end of capacitor C 8 and resistance R 6 all is connected with output terminal VC, is connected with a capacitor C 9 between output terminal VC and the output terminal REF; Also be connected with a magnetic bead L4 between described resistance R 1 and the output terminal VA; Also be connected with a magnetic bead L5 between described resistance R 3 and the output terminal VB; Also be connected with a magnetic bead L6 between described resistance R 5 and the output terminal VC.
Magnetic bead can effectively suppress the high frequency interference on the circuit, and magnetic bead L5 that between the magnetic bead L4, resistance R 3 and the output terminal VB that increase between the resistance R 1 and the first output terminal VA, increases and the magnetic bead L6 that between resistance R 5 and output terminal VC, increases can improve the antijamming capability of circuit effectively.
Claims (1)
1. the voltage circuit signal processing circuit of a three phases electronic energy meter comprises four input end LA, LB, LC, LN and four output terminal VA, VB, VC, REF; Be serially connected with magnetic bead L1 and resistance R 1 between input end LA and the output terminal VA successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR1, capacitor C 1, capacitor C 2 and resistance R 2; The other end of voltage dependent resistor (VDR) VAR1 is connected with input end LA; The other end of capacitor C 1 is connected between magnetic bead L1 and the resistance R 1, and the other end of capacitor C 2 and resistance R 2 all is connected with output terminal VA, is connected with a capacitor C 3 between output terminal VA and the output terminal REF; Be serially connected with magnetic bead L2 and resistance R 3 between input end LB and the output terminal VB successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR2, capacitor C 4, capacitor C 5 and resistance R 4; The other end of voltage dependent resistor (VDR) VAR2 is connected with input end LB; The other end of capacitor C 4 is connected between magnetic bead L2 and the resistance R 3, and the other end of capacitor C 5 and resistance R 4 all is connected with output terminal VB, is connected with a capacitor C 6 between output terminal VB and the output terminal REF; Be serially connected with magnetic bead L3 and resistance R 5 between input end LC and the output terminal VC successively; Input end LN is connected with an end of voltage dependent resistor (VDR) VAR3, capacitor C 7, capacitor C 8 and resistance R 6; The other end of voltage dependent resistor (VDR) VAR3 is connected with input end LC; The other end of capacitor C 7 is connected between magnetic bead L3 and the resistance R 5, and the other end of capacitor C 8 and resistance R 6 all is connected with output terminal VC, is connected with a capacitor C 9 between output terminal VC and the output terminal REF; It is characterized in that: also be connected with a magnetic bead L4 between described resistance R 1 and the output terminal VA; Also be connected with a magnetic bead L5 between described resistance R 3 and the output terminal VB; Also be connected with a magnetic bead L6 between described resistance R 5 and the output terminal VC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204845530U CN202362376U (en) | 2011-11-29 | 2011-11-29 | Voltage loop signal processing circuit of three-phase electronic type electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204845530U CN202362376U (en) | 2011-11-29 | 2011-11-29 | Voltage loop signal processing circuit of three-phase electronic type electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN202362376U true CN202362376U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204845530U Expired - Lifetime CN202362376U (en) | 2011-11-29 | 2011-11-29 | Voltage loop signal processing circuit of three-phase electronic type electric energy meter |
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| Country | Link |
|---|---|
| CN (1) | CN202362376U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110875682A (en) * | 2018-09-02 | 2020-03-10 | 青岛鼎信通讯股份有限公司 | Lightning surge protection circuit |
-
2011
- 2011-11-29 CN CN2011204845530U patent/CN202362376U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110875682A (en) * | 2018-09-02 | 2020-03-10 | 青岛鼎信通讯股份有限公司 | Lightning surge protection circuit |
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| 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: 315191 Yinzhou Industrial Park, Zhejiang, Ningbo, Yinzhou District, Ningbo Patentee after: NINGBO SANXING MEDICAL ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo Sanxing Electric Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
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| CX01 | Expiry of patent term |