CN205353197U - Intelligence single -phase electric energy meter - Google Patents
Intelligence single -phase electric energy meter Download PDFInfo
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- CN205353197U CN205353197U CN201521092806.4U CN201521092806U CN205353197U CN 205353197 U CN205353197 U CN 205353197U CN 201521092806 U CN201521092806 U CN 201521092806U CN 205353197 U CN205353197 U CN 205353197U
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Abstract
The utility model discloses an intelligence single -phase electric energy meter, including direct current DC converting circuit, measurement chip, ammeter input, a looks C looks / zero looks power supply circuit, a looks C looks voltage sampling circuit and A looks C looks current sampling circuit, connecting direct current DC converting circuit after A looks C looks / zero looks power supply circuit is parallelly connected and supplying power for the electric energy meter, a looks C looks voltage sampling circuit and A looks C looks current sampling circuit are connected and spread into voltage, current sample signal into the measurement chip with the measurement chip. The utility model designs a general power supply circuit and voltage, current sampling circuit, to each single -phase electric energy meter who plants concrete type, general circuit all can satisfy the demand of this type electric energy meter, consequently the utility model discloses single -phase intelligent ammeter that can compatible polymorphic type, the circuit is simple, low cost, and general circuit design effectively reduces manufacturing enterprise's design and manufacturing cost for electric energy meter manufacturing enterprise has greatly alleviateed production and research and development cost.
Description
Technical field
This utility model this be specifically related to a kind of Intelligent single-phase electric energy meter.
Background technology
Along with the raising of the development of national economy technology and living standards of the people, electric energy has had become as people's daily life, factory and enterprise produces the first-selected energy of office etc., one of indispensable energy.Accordingly, as the electric energy meter of electric power meter, its effect in measurement of power and importance are self-evident.
At present, electric energy meter comes into intellectualization times, and intelligent electric energy meter, with advantages such as its automatization, long-range, precisions, has become as the main table meter in power system electric energy metrical field.Intelligent electric energy meter is generally made up of measuring unit (sampling unit), data processing unit, communication unit etc., the function such as have electrical energy metering, data process, monitor in real time, automatically control, information is mutual.
At present, residential electricity consumption, office electricity consumption etc. are 220V single-phase alternating current, although its power consumption is little, but user is numerous, and therefore Intelligent single-phase electric energy meter accounting in intelligent electric energy meter is more.At present, the Intelligent single-phase electric energy meter on market generally comprises 1P2W, 1P3W and 2P3W three kinds, and these three sections of electric energy meters are each applied in different occasions, although its circuit theory is substantially similar, but is specific to each concrete phenotype, and its hardware circuit all differs；The Intelligent single-phase electric energy meter of so many kind, for every a phenotype, ammeter manufacturer all needs specialized designs hardware circuit, wastes time and energy, and production cost remains high.
Utility model content
The purpose of this utility model be in that to provide a kind of can compatible described 1P2W, three kinds of specification electric energy meters of 1P3W and 2P3W, effectively reduce manufacturing enterprise and be designed and manufactured as this Intelligent single-phase electric energy meter.
This Intelligent single-phase electric energy meter that this utility model provides, including DC/DC conversion circuit and computation chip, characterized by further comprising and inputted anode by A phase power supply, A phase power supply input negative terminal, C phase power supply input anode, the ammeter input of C item power supply input negative terminal and zero phase power input composition, the input negative terminal shorting stub of A phase power supply, C phase power supply for connecting shorting stub inputs negative terminal short circuit point, A phase power resistor, for connecting the C phase power resistor junction point of resistance, zero phase power resistor, A commutating phase circuit, for connecting the C commutating phase circuit connection point of rectification circuit, N commutating phase circuit, A phase voltage sample circuit, A phase current sampling circuit, for connecting the C phase voltage sample circuit junction point of voltage sampling circuit and for connecting the C phase current sampling circuit junction point of current sampling circuit；The outside 220V civil power needing metering accesses Intelligent single-phase electric energy meter by ammeter input, after A phase power supply input negative terminal shorting stub short circuit A phase power supply input anode and A phase power supply input negative terminal, it is connected with A commutating phase circuit again through A phase power resistor, C phase power supply input negative terminal short circuit point is for the input anode of short circuit C phase power supply as required and C phase power supply input negative terminal, C phase power supply input anode is connected with C commutating phase circuit connection point by C phase power resistor junction point, zero phase power input connects zero commutating phase circuit by zero phase power resistor, A commutating phase circuit, DC/DC conversion circuit is connected after C commutating phase circuit connection point and zero commutating phase circuit in parallel, power supply is provided for Intelligent single-phase electric energy meter；A phase voltage sample circuit and A phase current sampling circuit are connected with computation chip, and the outside A phase voltage of 220V civil power and the sampled signal of electric current are input to computation chip；C phase voltage sample circuit junction point and C phase current sampling circuit junction point are connected with computation chip.
Described Intelligent single-phase electric energy meter also includes A phase protective resistance and A phase filter capacitor；A phase protective resistance and A phase filter capacitor are all connected in parallel between A phase power supply input anode and zero phase power input.
Described Intelligent single-phase electric energy meter also includes the C phase protective resistance/shorting stub junction point for connecting protective resistance or shorting stub and for connecting the C phase filter capacitor junction point of filter capacitor；C phase protective resistance/shorting stub junction point and C phase filter capacitor junction point are all connected in parallel between C phase power supply input anode and zero phase power input.
Described Intelligent single-phase electric energy meter, C phase power supply input negative terminal short circuit point connects shorting stub, and C phase protective resistance/shorting stub junction point connects shorting stub, and C phase current sampling circuit junction point connects current sampling circuit.
Described Intelligent single-phase electric energy meter; C phase power supply input negative terminal short circuit point connects shorting stub; C phase protective resistance/shorting stub junction point connects protective resistance; C phase current sampling circuit junction point connects current sampling circuit; C phase power resistor junction point connects power resistor; C commutating phase circuit connection point connects rectification circuit, and C phase filter capacitor junction point connects filter capacitor, and C phase voltage sample circuit junction point connects voltage sampling circuit.
Described A phase/zero phase/C commutating phase circuit is diode uncontrollable rectifier circuit.
Described A phase voltage sample circuit and C phase voltage sample circuit are the voltage sampling circuit including divider resistance, filter circuit and sampling resistor.
The current sampling circuit that described A phase current sampling circuit and C phase current sampling circuit adopt model to be the chip of 71M6601, current sampling resistor, filter circuit and transformator.
Described computation chip is the computation chip supporting 2 road electric currents, 2 road voltage samples.
This Intelligent single-phase electric energy meter that this utility model provides, on the basis single-phase intelligent electric energy meter of 1P2W, 1P3W and 2P3W three types being analyzed and compare, novelty devise general power circuit and voltage, current sampling circuit, single-phase intelligent electric energy meter for each particular type, universal circuit carries out extremely simple improvement and can meet the demand of the type electric energy meter, therefore this utility model can compatible described 1P2W, 1P3W and 2P3W three types single-phase intelligent electric energy meter, circuit is simple, with low cost；And universal circuit design is Intelligent single-phase electric energy meter manufacturing enterprise dramatically reduces production and R&D costs, effectively reduces manufacturing enterprise and be designed and manufactured as this.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present utility model.
Fig. 2 is the power circuit principle figure of a kind of embodiment of the present utility model.
Fig. 3 is the voltage sample module principle figure of a kind of embodiment of the present utility model.
Fig. 4 is the A phase current sampling schematic diagram of a kind of embodiment of the present utility model.
Fig. 5 is the C phase current sampling schematic diagram of a kind of embodiment of the present utility model.
Detailed description of the invention
It is illustrated in figure 1 functional block diagram of the present utility model: this Intelligent single-phase electric energy meter that this utility model provides, including A phase voltage sample circuit, A phase current sampling circuit, C phase piezoelectric voltage sample circuit, C phase current sampling circuit, power circuit, computation chip, communicating circuit and display module；A phase voltage sample circuit, A phase current sampling circuit, C phase piezoelectric voltage sample circuit, C phase current sampling circuit, communicating circuit and display module all connect with computation chip, and above-mentioned all module for power supply given by power circuit；Wherein owing to support eurypalynous unidirectional intelligent electric energy meter, computation chip needs to adopt the computation chip supporting 2 road electric currents, 2 road voltage samples, if model is the computation chip of Max71315s.
It is illustrated in figure 2 in power circuit principle figure: figure of a kind of embodiment of the present utility model shown in circle partly for supporting the core circuit of polymorphic type single-phase intelligent electric energy meter, including A phase power input (figure indicates UA-and UA), C phase power input (indicates UC-and UC) in figure, zero phase power input (indicates UN) in figure, A phase power resistor (indicates RA1) in figure, C phase power resistor (indicates RC1) in figure, zero phase power resistor (indicates RN1) in figure, protective resistance (indicates VAR1) in figure, A phase filter capacitor (indicates CV1) in figure, C phase filter capacitor (indicates CV2) in figure, C phase short circuit/protective resistance (indicates VAR2) in figure, and A phase/C phase/N commutating phase circuit；Wherein A phase/C phase/N commutating phase circuit all adopts the not empty rectification of diode, and wherein A commutating phase circuit includes diode D2 and D17, C commutating phase circuit and includes diode D7 and D19, N commutating phase circuit and include diode D9 and D21.It is relay power, computation chip power supply and telecommunication circuit power supply etc. that circuit outside circle is used for the Power convert after rectification.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 1P2W specification; in figure, the device in circle selects mode as follows: A phase wire jumper (in figure sign SB2) short circuit; A phase protective resistance, A phase filter capacitor, A phase power resistor, zero phase power resistor, A commutating phase circuit and N commutating phase circuit all adopt; removing outside above-mentioned device in circle, other device does not adopt without exception；All circuit outside circle are the circuit that must adopt.Now, outside A phase power supply connects A commutating phase circuit again by after A phase power input, A phase power resistor, external power source zero line connects zero line rectification circuit by zero phase power input, zero line power resistor, and external power source is that intelligent electric energy meter is powered by power circuit.Now the L1 line of outside 220V civil power is connected with A phase power supply input anode, and zero line N and the zero phase power input of outside civil power connect；User needs that with A phase power supply, the L1 line of power supply of registering one's residence is inputted negative terminal and is connected, and the zero line of power supply of registering one's residence and the connection of zero phase power input get final product power taking.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 1P3W specification; in figure, the device in circle selects mode as follows: A phase wire jumper (in figure sign SB2) short circuit; C phase wire jumper (in figure sign SB1) short circuit, A phase protective resistance, A phase filter capacitor, A phase power resistor, zero phase power resistor, A commutating phase circuit and N commutating phase circuit all adopt; and C phase protect/short circuit resistance VAR2 must short circuit; removing outside above-mentioned device in circle, other device does not adopt without exception；All circuit outside circle are the circuit that must adopt.Now the L1 line of outside 220V civil power is connected with A phase power supply input anode, and the L2 line of outside 220V civil power inputs anode with C phase power supply and is connected；User needs to be connected the L1 line of power supply of registering one's residence with A phase power supply input negative terminal, and the L2 line of power supply of registering one's residence is connected with C phase power supply input negative terminal, and direct and outside civil power the zero line of the zero line of power supply of registering one's residence is connected and gets final product power taking.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 2P3W specification; in figure, the device in circle selects mode as follows: A phase wire jumper (in figure sign SB2) short circuit; C phase wire jumper (in figure indicate SB1) short circuit, A phase protective resistance, A phase filter capacitor, C phase protect/and short circuit resistance, C phase filter capacitor, A phase power resistor, C phase power resistor, zero phase power resistor, A commutating phase circuit, C commutating phase circuit and N commutating phase circuit all adopt, and C phase protects the/short circuit resistance VAR2 protective resistance that adopts resistance to be 20510 Ω；All circuit outside circle are the circuit that must adopt.Now the L1 line of outside 220V civil power is connected with A phase power supply input anode, and the L2 line of outside 220V civil power inputs anode with C phase power supply and is connected, and zero line N and the zero phase power input of outside civil power connect；User needs that with A phase power supply, the L1 line of power supply of registering one's residence is inputted negative terminal and is connected, and the L2 line of power supply of registering one's residence inputs negative terminal with C phase power supply and is connected, and the zero line of power supply of registering one's residence direct connection with zero phase power input of electric energy meter gets final product power taking.
As shown in Figure 3, the voltage sample module principle figure of a kind of embodiment of the present utility model: in this embodiment, voltage sample module includes A phase voltage sampling module and C phase voltage sampling module, and wherein A phase voltage sampling module includes A phase divider resistance (indicating R43, R45, R48, R50, R52, R54, R56 and R58 in figure), the first filter circuit (indicating R60 and C63 in figure), the second filter circuit (indicating C60, L1 in figure), A phase voltage sampling resistor (indicating R82 and R84 in figure) and the 3rd filter circuit (indicating C34 in figure) composition；C phase voltage sampling module includes C phase divider resistance (indicating R42, R44, R47, R49, R51, R53, R55 and R57 in figure), the 4th filter circuit (indicating R59 and C62 in figure), the 5th filter circuit (indicating C59, L2 in figure), C phase voltage sampling resistor (indicating R83 and R85 in figure) and the 6th filter circuit (indicating C33 in figure) composition；Resistance R87 is a resistance is the short circuit resistance of 0 Ω；The output signal (indicating VA in figure) of A phase voltage sample circuit is connected to computation chip, and the output signal (indicating VB in figure) of C phase voltage sample circuit is connected to computation chip.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 1P2W specification, voltage sampling circuit adopts circuit only with A phase voltage, and is not connected to C phase voltage sample circuit and short circuit resistance.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 1P3W specification, voltage sampling circuit adopts A phase voltage to adopt circuit and short circuit resistance, and is not connected to C phase voltage sample circuit.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 2P3W specification, voltage sampling circuit adopts A phase voltage to adopt circuit and C phase voltage sample circuit, and is not connected to short circuit resistance.
It is illustrated in figure 4 the A phase current sampling schematic diagram of a kind of embodiment of the present utility model, similar, Fig. 5 is the C phase current sampling schematic diagram of a kind of embodiment of the present utility model: in this embodiment, and it is the chip of 71M6601, current sampling resistor, filter circuit and transformator that A phase current sampling circuit and C phase current sampling circuit all include model.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 1P2W specification, current sampling circuit adopts circuit only with A phase current, and is not connected to C phase current sampling circuit.
When this single-phase intelligent electric energy meter that this utility model provides is applicable to 1P3W and 2P3W specification, current sampling circuit adopts A phase current to adopt circuit and C phase current sampling circuit.
In sum; when this single-phase intelligent electric energy meter that this utility model provides is suitable in 1P2W specification: Fig. 2, the device in circle is selected as follows: A phase wire jumper (in figure sign SB2) short circuit; A phase protective resistance, A phase filter capacitor, A phase power resistor, zero phase power resistor, A commutating phase circuit and N commutating phase circuit all adopt; removing outside above-mentioned device in circle, other device does not adopt without exception；All circuit outside circle are the circuit that must adopt.Now, outside A phase power supply connects A commutating phase circuit again by after A phase power input, A phase power resistor, external power source zero line connects zero line rectification circuit by zero phase power input, zero line power resistor, and external power source is that intelligent electric energy meter is powered by power circuit.Voltage sampling circuit adopts circuit only with A phase voltage, and is not connected to C phase voltage sample circuit and short circuit resistance.Current sampling circuit adopts circuit only with A phase current, and is not connected to C phase current sampling circuit.
When this single-phase intelligent electric energy meter that this utility model provides is suitable in 1P3W specification: Fig. 2, the device in circle is selected as follows: A phase wire jumper (in figure sign SB2) short circuit; C phase wire jumper (in figure sign SB1) short circuit, A phase protective resistance, A phase filter capacitor, A phase power resistor, zero phase power resistor, A commutating phase circuit and N commutating phase circuit all adopt; and C phase protect/short circuit resistance VAR2 must short circuit; removing outside above-mentioned device in circle, other device does not adopt without exception；All circuit outside circle are the circuit that must adopt.Voltage sampling circuit adopts A phase voltage to adopt circuit and short circuit resistance, and is not connected to C phase voltage sample circuit.Current sampling circuit adopts A phase current to adopt circuit and C phase current sampling circuit.
When this single-phase intelligent electric energy meter that this utility model provides is suitable in 2P3W specification: Fig. 2 figure, the device in circle is selected as follows: A phase wire jumper (in figure sign SB2) short circuit; C phase wire jumper (in figure indicate SB1) short circuit, A phase protective resistance, A phase filter capacitor, C phase protect/and short circuit resistance, C phase filter capacitor, A phase power resistor, C phase power resistor, zero phase power resistor, A commutating phase circuit, C commutating phase circuit and N commutating phase circuit all adopt, and C phase protects the/short circuit resistance VAR2 protective resistance that adopts resistance to be 20510 Ω；All circuit outside circle are the circuit that must adopt.Voltage sampling circuit adopts A phase voltage to adopt circuit and C phase voltage sample circuit, and is not connected to short circuit resistance.Current sampling circuit adopts A phase current to adopt circuit and C phase current sampling circuit.
Claims (9)
1. an Intelligent single-phase electric energy meter, including DC/DC conversion circuit and computation chip, characterized by further comprising and inputted anode by A phase power supply, A phase power supply input negative terminal, C phase power supply input anode, the ammeter input of C item power supply input negative terminal and zero phase power input composition, the input negative terminal shorting stub of A phase power supply, C phase power supply for connecting shorting stub inputs negative terminal short circuit point, A phase power resistor, for connecting the C phase power resistor junction point of resistance, zero phase power resistor, A commutating phase circuit, for connecting the C commutating phase circuit connection point of rectification circuit, N commutating phase circuit, A phase voltage sample circuit, A phase current sampling circuit, for connecting the C phase voltage sample circuit junction point of voltage sampling circuit and for connecting the C phase current sampling circuit junction point of current sampling circuit；The outside 220V civil power needing metering accesses Intelligent single-phase electric energy meter by ammeter input, after A phase power supply input negative terminal shorting stub short circuit A phase power supply input anode and A phase power supply input negative terminal, it is connected with A commutating phase circuit again through A phase power resistor, C phase power supply input negative terminal short circuit point is for the input anode of short circuit C phase power supply as required and C phase power supply input negative terminal, C phase power supply input anode is connected with C commutating phase circuit connection point by C phase power resistor junction point, zero phase power input connects zero commutating phase circuit by zero phase power resistor, A commutating phase circuit, DC/DC conversion circuit is connected after C commutating phase circuit connection point and zero commutating phase circuit in parallel, power supply is provided for Intelligent single-phase electric energy meter；A phase voltage sample circuit and A phase current sampling circuit are connected with computation chip, and the outside A phase voltage of 220V civil power and the sampled signal of electric current are input to computation chip；C phase voltage sample circuit junction point and C phase current sampling circuit junction point are connected with computation chip.
2. Intelligent single-phase electric energy meter according to claim 1, it is characterised in that also include A phase protective resistance and A phase filter capacitor；A phase protective resistance and A phase filter capacitor are all connected in parallel between A phase power supply input anode and zero phase power input.
3. Intelligent single-phase electric energy meter according to claim 1, it is characterised in that also include the C phase protective resistance/shorting stub junction point for connecting protective resistance or shorting stub and for connecting the C phase filter capacitor junction point of filter capacitor；C phase protective resistance/shorting stub junction point and C phase filter capacitor junction point are all connected in parallel between C phase power supply input anode and zero phase power input.
4. Intelligent single-phase electric energy meter according to claim 3, it is characterised in that C phase power supply input negative terminal short circuit point connects shorting stub, and C phase protective resistance/shorting stub junction point connects shorting stub, and C phase current sampling circuit junction point connects current sampling circuit.
5. Intelligent single-phase electric energy meter according to claim 3; it is characterized in that C phase power supply input negative terminal short circuit point connects shorting stub; C phase protective resistance/shorting stub junction point connects protective resistance; C phase current sampling circuit junction point connects current sampling circuit; C phase power resistor junction point connects power resistor; C commutating phase circuit connection point connects rectification circuit, and C phase filter capacitor junction point connects filter capacitor, and C phase voltage sample circuit junction point connects voltage sampling circuit.
6. Intelligent single-phase electric energy meter according to claim 1, it is characterised in that described A phase/zero phase/C commutating phase circuit is diode uncontrollable rectifier circuit.
7. Intelligent single-phase electric energy meter according to claim 6, it is characterised in that described A phase voltage sample circuit and C phase voltage sample circuit are the voltage sampling circuit including divider resistance, filter circuit and sampling resistor.
8. Intelligent single-phase electric energy meter according to claim 6, it is characterised in that the current sampling circuit that described A phase current sampling circuit and C phase current sampling circuit adopt model to be the chip of 71M6601, current sampling resistor, filter circuit and transformator.
9. Intelligent single-phase electric energy meter according to claim 6, it is characterised in that described computation chip is the computation chip supporting 2 road electric currents, 2 road voltage samples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521092806.4U CN205353197U (en) | 2015-12-25 | 2015-12-25 | Intelligence single -phase electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521092806.4U CN205353197U (en) | 2015-12-25 | 2015-12-25 | Intelligence single -phase electric energy meter |
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| CN205353197U true CN205353197U (en) | 2016-06-29 |
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| CN201521092806.4U Active CN205353197U (en) | 2015-12-25 | 2015-12-25 | Intelligence single -phase electric energy meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249043A (en) * | 2016-07-19 | 2016-12-21 | 柳州龙辉科技有限公司 | A kind of single-phase electric energy measuring instruments |
| CN106680550A (en) * | 2017-01-12 | 2017-05-17 | 中国计量大学 | Three-phase four-wire electric energy meter with precise zero-crossing phase line switching |
-
2015
- 2015-12-25 CN CN201521092806.4U patent/CN205353197U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249043A (en) * | 2016-07-19 | 2016-12-21 | 柳州龙辉科技有限公司 | A kind of single-phase electric energy measuring instruments |
| CN106680550A (en) * | 2017-01-12 | 2017-05-17 | 中国计量大学 | Three-phase four-wire electric energy meter with precise zero-crossing phase line switching |
| CN106680550B (en) * | 2017-01-12 | 2019-07-30 | 中国计量大学 | With the accurate three-phase and four-line electric energy meter for crossing zero phase line switching |
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