CN108092529A - A kind of Three phase electrical energy meter electricity source circuit - Google Patents
A kind of Three phase electrical energy meter electricity source circuit Download PDFInfo
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- CN108092529A CN108092529A CN201711447168.7A CN201711447168A CN108092529A CN 108092529 A CN108092529 A CN 108092529A CN 201711447168 A CN201711447168 A CN 201711447168A CN 108092529 A CN108092529 A CN 108092529A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
Abstract
A kind of Three phase electrical energy meter electricity source circuit, including sequentially connected front-end protection circuit, rectification circuit, filter circuit, transformer output circuit.The output power of entire power supply is improved using this power circuit, voltage adaptation scope is increased, stability, the safety and reliability of electric power output voltage are improved, compared to traditional power circuit, the weight of electric energy meter is effectively reduced, reduces waste and the transportation cost of resource.
Description
Technical field
The invention belongs to electronic electricity meter technical fields, and in particular to a kind of Three phase electrical energy meter electricity source circuit.
Background technology
The side that three-phase electric energy meter power supply circuit is generally depressured using front-end protection circuit, three linear transformers at present
Formula also has capacitance-resistance of the fraction for the three-phase electric energy meter in secondary market or foreign trade market using three safety capacitances as power supply
Then aforementioned power source is passed through common rectification circuit, filter circuit, regulator circuit, control electricity by decompression mode as power supply
Road etc. forms three-phase electric energy meter power supply circuit.But front both with the decompression of three linear transformers and three safety capacitances
Resistance-capacitance depressurization mode be power supply formed three-phase electric energy meter power supply circuit, there are following defects：
1. first way is using the power supply by the way of the decompression of three linear transformers, in actual production in use, because
Linear transformer it is of high cost, result in production procurement and later stage operation expense higher, linear transformer energization transformation
Also signal interference source can be formed.And in order to ensure that electric energy meter can reach electric energy meter technology requirement as defined in State Grid Corporation of China, only
It can increase that the iron core of transformer is more demanding, that is, need using all higher transformer of transfer efficiency and output power, this
Sample more adds the use cost of transformer；In addition, larger pcb board area is occupied using three transformers, it is necessary to add
Big pcb board dimensioned area so that the cost of pcb board also expands therewith；Entire electric energy meter product is added using three transformers
Weight, just increase the cost of transport；Using three transformers, electromagnetic induction magnetic field can be generated when transformer works, is produced
Raw induced field can disturb the generations such as sampled signal, the computation chip inside electric energy meter, so as to influence the metering of electric energy meter
Accuracy；
2. the second way is using the power supply of three safety capacitance resistance-capacitance depressurization modes, although the energy when actual production uses
Buying manufacture cost is reduced, but the overall power of itself of product can be increased by the way of safety capacitance, influences to use the longevity
Life.Using the safety capacitance of power circuit of safety capacitance decompression, its loss angle is larger, especially bad as not enough in power grid quality
Stablize or easily generate in the power grid of harmonic wave, safety capacitance is very easy to hot, more increases the loss of safety capacitance, reduces
Service life, that is, the capacitance of safety capacitance decline, and ultimately result in step-down value reduction, be less than or be not achieved computation chip,
The components normal working voltage such as single-chip microprocessor MCU.So that electric energy meter can not work normally metering, crash etc..
Therefore, existing three-phase electric energy meter power supply circuit there are it is more the defects of, it is also necessary to carry out Improvement.
The content of the invention
The purpose of the present invention is to solve the above problems, provide a kind of Three phase electrical energy meter electricity source circuit.
In order to reach foregoing invention purpose, the present invention uses following technical scheme：
A kind of Three phase electrical energy meter electricity source circuit, including sequentially connected front-end protection circuit, rectification circuit, filtered electrical
Road, transformer output circuit.
Further, the rectification circuit includes 4 groups of diodes, and any one group of diode is formed by two Diode series,
Connecting line between two diodes is connected with any phase firewire in the three-phase voltage or zero curve.
Further, the filter circuit includes capacitance Cx1, common mode inductance L2, capacitance CP22, the input terminal of common mode inductance L2
The capacitance Cx1 is concatenated between both sides, the capacitance CP22, common mode inductance L2 are concatenated between the output terminal both sides of common mode inductance L2
Output terminal both sides wherein one termination simulation ground.
Further, the other end of the output terminal both sides of the common mode inductance L2 is with connecing that concatenate first between simulation ground electric
Resistance, the first resistor both ends are connected respectively with electrolytic capacitor both ends.
Further, the first resistor is by resistance RP4, resistance RP5, resistance RP6, resistance RP7, resistance RP8, resistance
RP9 is sequentially connected in series；The electrolytic capacitor includes electrolytic capacitor CP27, electrolytic capacitor CP28, the electrolytic capacitor CP27's
Both ends are connected respectively with resistance RP4 one end, resistance RP6 one end, the electrolytic capacitor CP28 both ends respectively with resistance RP7 one end,
Resistance RP9 one end connects.
Further, the transformer output circuit includes transformer T1, and transformer T1 output terminals are divided into the first secondary coil
And second subprime coil two-way；Described first secondary coil one end is concatenated with diode DP13, inductance L3, and the first secondary coil is another
One 485 ground of termination；Described second subprime coil one end is concatenated with diode DP12, electrolytic capacitor CP31, the second subprime line
The circle other end is concatenated with safety capacitance CP24, safety capacitance CP23.
Further, both ends series resistor RP25, the capacitance CP32 of the diode DP13；And/or the diode
Capacitance CP12 one end, electrolytic capacitor CP30 anodes, capacitance CP12 are met on connecting line any two points between DP13, inductance L3 respectively
The other end, electrolytic capacitor CP30 cathode connect 485 ground；And/or the diode DP12 both ends series resistor RP17, capacitance CP25.
Further, the input terminal of the transformer output circuit is also associated with first switch control circuit, and described first opens
Close the input voltage that control circuit controls the transformer output circuit.
Further, the first switch control circuit includes the diode being serially connected between two input terminals of switching tube
DP9, resistance group, the resistance group include resistance RP24, connecting resistance RP23, the end of resistance RP23 and NMOS outside resistance RP24 both ends
Power supply switch tube QP1 grids, diode DP10 cathode connection, power supply switch tube QP1 source electrodes, the diode DP10 of the NMOS
Anode connects；The power supply switch tube QP1 drain electrodes of NMOS connect respectively with diode DP11 anodes, transformer T1 primary coils one end
It connecing, diode DP11 cathode are connected with a node of capacitance CP21, resistance RP15, resistance RP116 three parallel connection, capacitance CP21,
Resistance RP15, another node of resistance RP16 three parallel connection and switching tube input terminal, transformer T1 primary coils other end difference
Connection.
Further, the resistance group further includes the resistance RP10 being sequentially connected in series, resistance RP11, resistance RP12, resistance
RP13, the resistance RP13 connect with the resistance RP24.
Further, the transformer output circuit is also connected with second switch control circuit, the second switch control electricity
Road controls the power supply output of the transformer output circuit.
Further, the second switch control circuit includes Switching Power Supply control chip UP1, optocoupler OPT1, switch electricity
Source control chip UP1 is connected with optocoupler OPT1 output terminals, the both sides series resistor RP3 of the optocoupler OPT1 input terminals, resistance RP3
One end is connected respectively with resistance RP26, capacitance CP33, zener diode UP2 cathode, capacitance CP10；The capacitance CP10 and resistance
RP21, resistance RP31 concatenation are followed by 485 ground, and the zener diode UP2 anodes connect 485 ground；The public affairs of the zener diode UP2
End is connected with second switch control circuit power output end altogether.
Further, resistance RP14, the outer connecting resistance RP14 one end of resistance RP21, resistance RP31 connecting lines, resistance are further included
Common port of the RP14 one end simultaneously also with zener diode UP2 is connected, the resistance RP14 other ends and second switch control circuit
Power output end connects.
Further, the front-end protection circuit includes three power resistors RTa1, RTa2, RTa3, the power resistor
RTa1, RTa2, RTa3 are connected respectively with firewire VA ends, firewire VB ends, firewire VC ends.
Further, the front-end protection circuit further includes three varistors RVa1, RVa2, RVa3, the varistor
RVa1 one end, RVa2 one end, RVa3 one end are connected respectively with firewire VA ends, firewire VB ends, firewire VC ends, the varistor
The RVa1 other ends, the RVa2 other ends, the RVa3 other ends are connected with zero curve N.
Compared with prior art, the present invention advantageous effect is：
1st, power circuit using the present invention improves the output power of entire power supply；
2nd, voltage adaptation scope is increased；
3rd, the stability of electric power output voltage is improved；
4th, the safety and reliability of power supply is improved；
5th, power circuit using the present invention in electric energy meter compared to traditional power circuit, is effectively reduced electric energy
The weight of table reduces waste and the transportation cost of resource；
6th, the manufacture cost of circuit and electric energy meter product is significantly reduced, improves the quality and competitiveness of product.
Description of the drawings
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the front-end protection circuit diagram of the present invention；
Fig. 3 is the rectification circuit figure of the present invention；
Fig. 4 is the filter circuit figure of the present invention；
Fig. 5 is the first switch electric operation control circuit figure of the present invention；
Fig. 6 is the second switch electric operation control circuit figure of the present invention；
Fig. 7 is the transformer output circuit figure of the present invention.
Specific embodiment
Explanation is further described to technical scheme below by specific embodiment.
As shown in Figure 1, present embodiment discloses a kind of Three phase electrical energy meter electricity source circuit, mainly by front-end protection electricity
Road, rectification circuit, filter circuit, transformer output circuit are in series.
As a preferred embodiment, the input terminal in transformer output circuit is also associated with first switch control electricity
Road, the first switch control circuit control the input voltage of the transformer output circuit；And/or transformer output circuit
It is also connected with second switch control circuit, the second switch control circuit controls the power supply of the transformer output circuit defeated
Go out.
As a kind of preferred front-end protection circuit design, the front-end protection circuit in the present embodiment uses as shown in Figure 2
Circuit.Front-end protection circuit include three power resistors RTa1, RTa2, RTa3 and three varistor RVa1, RVa2,
RVa3, power resistor RTa1, RTa2, RTa3 are connected respectively with firewire VA ends, firewire VB ends, firewire VC ends, varistor RVa1
The other end, the RVa2 other ends, the RVa3 other ends are connected with zero curve N；And/or varistor RVa1 one end, RVa2 one end, RVa3
One end is connected respectively with firewire VA ends, firewire VB ends, firewire VC ends, the varistor RVa1 other ends, the RVa2 other ends,
The RVa3 other ends are connected with zero curve N.
Front-end protection circuit shown in Fig. 2 causes power grid to have surge electricity using three varistors RVa1, RVa2, RVa3
Safeguard function is pressed, causes power grid that there is overload protection function using three power resistors RTa1, RTa2, RTa3.
The technical indicator of this front-end protection circuit power grid surge voltage protection：
Surge immunity is tested：Between line and line, positive and negative 4kV, 2 ohm of impedance；
Earth fault inhibits experiment：10% overvoltage of phase voltage, when earth fault, bear 1.9 times of rated voltages.
The technical indicator of this front-end protection circuit overloads protection：
Overall Power Consumption test request：Without module, under single-phase rated voltage, Overall Power Consumption is less than 0.4W, and design requirement is small
In 0.3W；
Switching Power Supply fan-out capability：15V/0.6A, 9V/0.2A.
It is designed as a kind of preferred rectification circuit, the rectification circuit in the present embodiment is whole using circuit as shown in Figure 3
Current circuit includes 4 groups of diodes, is exported after four groups of diodes in parallel, and any one group of diode is formed by two Diode series,
Connecting line between two diodes is connected with any phase firewire in the three-phase voltage or zero curve.Specially diode D1 with
On diode D5 connecting lines a bit, on diode D2 and diode D6 connecting lines a bit, diode D3 and diode D7 connecting lines
On a bit, on diode D4 and diode D8 connecting lines a little connect the output terminals of four lines on front-end protection circuit respectively.
Rectification circuit shown in Fig. 3 has reached rectification purpose using the connection relation of 8 diodes, and the technology of this circuit is surveyed
Try index,
Earth fault inhibits experiment：10% overvoltage of phase voltage, when earth fault, bear 1.9 times of rated voltages；
Switching Power Supply fan-out capability：15V/0.6A, 9V/0.2A.
As a kind of preferable selection of element model, the diode in this rectification circuit uses EM516 models.
As a kind of preferred filter circuit design, the filter circuit in the present embodiment uses circuit as shown in Figure 4, filter
Wave circuit functionally belongs to ON-OFF control circuit input terminal, including capacitance Cx1, common mode inductance L2, capacitance CP22, common mode inductance
The capacitance Cx1 is concatenated between the input terminal both sides of L2, the capacitance CP22 is concatenated between the output terminal both sides of common mode inductance L2,
Wherein one termination simulation ground of the output terminal both sides of common mode inductance L2.The other end of the output terminal both sides of common mode inductance L2 is with connecing mould
Intend concatenating first resistor between ground, the first resistor both ends are connected respectively with electrolytic capacitor both ends.Wherein, first resistor is by electricity
Resistance RP4, resistance RP5, resistance RP6, resistance RP7, resistance RP8, resistance RP9 are sequentially connected in series, and electrolytic capacitor includes electrolysis electricity
Appearance CP27, the both ends of electrolytic capacitor CP28, the electrolytic capacitor CP27 are connected respectively with resistance RP4 one end, resistance RP6 one end,
The electrolytic capacitor CP28 both ends are connected respectively with resistance RP7 one end, resistance RP9 one end.
Filter circuit shown in Fig. 4, capacitance Cx1 select CBB21 (MPR) capacitance, 0.22uF/1250V；Common mode inductance L2,
U9.8-25mH；CP22 selects ceramic disc capacitor, 1000pF/1kV.This circuit mainly utilizes capacitance Cx1, common mode inductance L2, capacitance
CP22 realizes the EMI High-frequency Interferences for inhibiting to be generated when externally input high-frequency pulse signal and attenuation circuit itself work；Its
The technical indicator of test：Conducted Radio Frequency disturbance jamming immunity is tested, test frequency 150kHz-30MHz.Resistance RP4- in this circuit
9 select 1206/1M, electrolytic capacitor CP27-28 to select 33uF/400V, utilize resistance RP4, resistance RP5, resistance RP6, resistance
RP7, resistance RP8, resistance RP9 and electrolytic capacitor CP27, electrolytic capacitor CP28 form a filter function, to the voltage after rectification
Effectively filtered；The technical indicator voltage power supply scope of filtering is 99-475V.
It is designed as a kind of preferred first switch control circuit, the first switch control circuit in the present embodiment is using such as
Circuit shown in Fig. 5, first switch control circuit include the diode DP9, the resistance that are serially connected between two input terminals of switching tube
Group, the resistance group include resistance RP24, the outer connecting resistance RP23 in resistance RP24 both ends, resistance RP23 hold and the power supply of NMOS is opened
Pipe QP1 grids, the connection of diode DP10 cathode are closed, power supply switch tube QP1 source electrodes, the diode DP10 anodes of the NMOS connect
It connects；The power supply switch tube QP1 drain electrodes of NMOS are connected respectively with diode DP11 anodes, transformer T1 primary coils one end, two poles
Pipe DP11 cathode are connected with a node of capacitance CP21, resistance RP15, resistance RP116 three parallel connection, capacitance CP21, resistance
RP15, another node of resistance RP116 three parallel connection and switching tube input terminal, the transformer T1 primary coil other ends connect respectively
It connects.The resistance group further includes the resistance RP10 being sequentially connected in series, resistance RP11, resistance RP12, resistance RP13, the resistance RP13
It connects with the resistance RP24.
For the first switch control circuit shown in Fig. 5, concrete analysis it is following some：
1. by the use of resistance RP10-RP13 as current-limiting resistance, by the use of the power supply switch tube QP1 of NMOS as switch, two poles
Pipe DP10 uses Zener diode regulator, utilizes the conducting of above-mentioned component controls partial pressure metal-oxide-semiconductor QP1；Its technical indicator is voltage
Working range is 99-475V.
2. the voltage on chip is controlled to control certain Switching Power Supply using resistance RP23, resistance RP24, diode DP9
Scope is specifically 380V or so.Concrete analysis is as follows：
When switch control chip turns off：Rectified voltage is less than 380V, and DP9 is not turned on, and VG voltages are rectified voltage, surely
Pressure pipe forms access by UP1 so that pressure difference is voltage stabilizing tube voltage between the GS of metal-oxide-semiconductor QP1, ensures metal-oxide-semiconductor QP1 conductings；It is whole
When voltage is more than 380V after stream, DP9 work, VG voltage stabilizations are in 380V.
Switch control chip shutdown moment：Primary resetting voltage and leakage inductance peak voltage are added to metal-oxide-semiconductor QP1's
D feet so that D feet voltage is higher than rectified voltage, and since metal-oxide-semiconductor QP1 is turned at this time, then the S feet voltage of QP1 is equally higher than rectification
Voltage afterwards, the S feet voltage of such words QP1 are more than G foot voltages, are forward voltage drop 1V or so, metal-oxide-semiconductor QP1 on voltage-stabiliser tube DP10
It is turned off.If G feet voltage at this time is more than 380V, DP9 work, VG voltage stabilizations ensure the D feet of switch control chip in 380V
Voltage is in 380V or so.
Switch control chip turns on：Rectified voltage is less than 380V, and DP9 is not turned on, and the D feet voltage of UP1 is 0V, after rectification
For voltage by the D feet of RP10-13 and voltage-stabiliser tube to UP1, pressure difference is voltage stabilizing tube voltage between the GS of metal-oxide-semiconductor QP1, ensures metal-oxide-semiconductor
QP1 is turned on；When rectified voltage is more than 380V, the D feet voltage of UP1 is 0V, and pressure difference is voltage-stabiliser tube electricity between the GS of metal-oxide-semiconductor QP1
Pressure, so DP9 is not turned on.
3. form clamp circuit, switch control chip using resistance RP15, resistance RP16, capacitance CP21, diode DP11
Shutdown moment, VD voltages are the peak voltage of rectified voltage+transformer resetting voltage+leakage inductance, and clamp circuit is opened for limiting
Close the crest voltage on control chip (or tandem tap pipe).Switch control chip shutdown moment, transformer leakage inductance is stored up
It can be transferred in clamping capacitance, before switch control chip opening, the voltage on clamping capacitance is tiltedly released to close to transformer
Resetting voltage value, while ensure not less than transformer resetting voltage value, it is ensured that main magnetizing inductance energy is not consumed.Clamp voltage is examined
Consider the peak voltage generated just for leakage inductance, if the peak voltage under consideration is fully loaded is identical, opened in the case of minimum input voltage
It closes and controls the ON time of chip most long, the clamping capacitor voltage before switch control chip is opened is required to be more than in this case
Transformer resetting voltage value.
It is designed as a kind of preferred second switch control circuit, the second switch control circuit in the present embodiment is using such as
Circuit shown in Fig. 6, second switch control circuit include Switching Power Supply control chip UP1, optocoupler OPT1, Switching Power Supply control core
Piece UP1 is connected with optocoupler OPT1 output terminals, the both sides series resistor RP3 of the optocoupler OPT1 input terminals, resistance RP3 one end and electricity
Resistance RP26, capacitance CP33, zener diode UP2 cathode, capacitance CP10 are connected respectively；The capacitance CP10 and resistance RP21, electricity
Resistance RP31 concatenations are followed by 485 ground, and the zener diode UP2 anodes connect 485 ground；The common port of the zener diode UP2 with
Second switch control circuit power output end connects.One resistance RP14, resistance RP21, resistance RP31 connecting lines can also be set
Outer connecting resistance RP14 one end, common port of the resistance RP14 one end simultaneously also with zener diode UP2 are connected, the resistance RP14 other ends
It is connected with second switch control circuit power output end.The resistance RP3 other ends are also connected with resistance RP1.
Second switch control circuit shown in Fig. 6 relates generally to Switching Power Supply control chip UP1, capacitance CP8, capacitance
CP29, optocoupler OPT1, resistance RP1, resistance RP3；Resistance RP26, capacitance CP33；Resistance RP14, resistance RP31, diode UP2；
The components such as capacitance CP10, resistance RP21 realize Switching Power Supply control chip and according to output voltage situation switch are controlled to carry out electricity
The function of source output.TNY280G models may be employed in Switching Power Supply control chip UP1 in this circuit.
As a kind of preferred transformer designing circuitry, the transformer output circuit in the present embodiment uses such as Fig. 7
Shown circuit, mainly using single transformer T1, transformer T1 output terminals are divided into the first secondary coil and second subprime coil
Two-way；Described first secondary coil one end is concatenated with diode DP13, inductance L3,485 ground of another termination of the first secondary coil；Institute
It states second subprime coil one end to concatenate with diode DP12, electrolytic capacitor CP31, the second subprime coil other end and safety
Capacitance CP24, safety capacitance CP23 are concatenated.It can also be in both ends series resistor RP25, the capacitance CP32 of diode DP13；Two
Capacitance CP12 one end, electrolytic capacitor CP30 anodes, capacitance are connect on connecting line any two points between pole pipe DP13, inductance L3 respectively
The CP12 other ends, electrolytic capacitor CP30 cathode connect 485 ground；Series resistor RP17, capacitance CP25 at diode DP12 both ends.
Transformer output circuit shown in Fig. 7, employ diode DP13, resistance RP25, capacitance CP32, capacitance CP12,
Capacitance CP30, inductance L3；Diode DP12, resistance RP17, capacitance CP25, capacitance CP31, capacitance CP23, capacitance CP24 components,
Realize transformer output rectification, filter function.
A key technical indexes involved in the present embodiment is：
1) voltage circuit power consumption：
Under non-communicating state：＜ 3W, 10VA；
Under communications status：＜ 8W；
2) external constant magnetic field sensing influences：In error variance limit value ± 1.0；
3) power frequency magnetic field influences：In error variance limit value ± 2.0；
4) AC voltage test：Line-to-earth voltage 4kV；
5) impulse test：Line-to-earth voltage 6kV；
6) voltage influence is tested：In error variance limit value ± 0.3.
The Three phase electrical energy meter electricity source circuit of the present embodiment is manufacturing and cost, output work is substantially reduced in
Rate, stability fully meet State Grid Corporation of China's electric energy meter technology requirement condition, have saved the occupancy face of power circuit PCB modules
Product and space reduce the interference of the electromagnetic induction brought during three transformer work, improve the stability of electric energy meter product
And quality.
Transformer output circuit in the present embodiment is also connected respectively with filter circuit of pressure-stabilizing 1, filter circuit of pressure-stabilizing 2, this 2
A filter circuit functionally belongs to ON-OFF control circuit output terminal, and filter circuit of pressure-stabilizing 1 is for metering, MCU, communication module
Circuits are waited, current custom circuit may be employed for 485 circuits in filter circuit of pressure-stabilizing 2.
It is above the preferred embodiment of the present invention, protection scope of the present invention is not limited, for people in the art
The deformation and improvement that member's mentality of designing according to the present invention is made, should all be considered as within protection scope of the present invention.
Claims (10)
1. a kind of Three phase electrical energy meter electricity source circuit, including sequentially connected front-end protection circuit, rectification circuit, filtered electrical
Road, transformer output circuit.
A kind of 2. Three phase electrical energy meter electricity source circuit according to claim 1, which is characterized in that the rectification circuit bag
4 groups of diodes are included, any one group of diode is formed by two Diode series, the connecting line between two diodes and described three
Any phase firewire or zero curve connection in phase voltage.
A kind of 3. Three phase electrical energy meter electricity source circuit according to claim 1, which is characterized in that the filter circuit bag
Capacitance Cx1, common mode inductance L2, capacitance CP22 are included, the capacitance Cx1, common mode are concatenated between the input terminal both sides of common mode inductance L2
The capacitance CP22, wherein one termination simulation of the output terminal both sides of common mode inductance L2 are concatenated between the output terminal both sides of inductance L2
Ground.
A kind of 4. Three phase electrical energy meter electricity source circuit according to claim 3, which is characterized in that the common mode inductance L2
The other ends of output terminal both sides concatenate first resistor between simulation ground with connecing, the first resistor both ends respectively with electrolytic capacitor
Both ends connect.
A kind of 5. Three phase electrical energy meter electricity source circuit according to claim 1, which is characterized in that the transformer output
Circuit includes transformer T1, and transformer T1 output terminals are divided into the first secondary coil and second subprime coil two-way；The first time
Grade coil one end is concatenated with diode DP13, inductance L3,485 ground of another termination of the first secondary coil；The second subprime coil
One end is concatenated with diode DP12, electrolytic capacitor CP31, the second subprime coil other end and safety capacitance CP24, safety electricity
Hold CP23 concatenations.
A kind of 6. Three phase electrical energy meter electricity source circuit according to claim 5, which is characterized in that the diode DP13
Both ends series resistor RP25, capacitance CP32；And/or on the connecting line any two points between the diode DP13, inductance L3
Capacitance CP12 one end, electrolytic capacitor CP30 anodes are connect respectively, and the capacitance CP12 other ends, electrolytic capacitor CP30 cathode connect 485 ground；
And/or the diode DP12 both ends series resistor RP17, capacitance CP25.
7. according to a kind of any Three phase electrical energy meter electricity source circuits of claim 1-6, which is characterized in that the transformation
The input terminal of device output circuit is also associated with first switch control circuit, and the first switch control circuit controls the transformer
The input voltage of output circuit.
8. according to a kind of any Three phase electrical energy meter electricity source circuits of claim 1-6, which is characterized in that the transformation
Device output circuit is also connected with second switch control circuit, and the second switch control circuit controls the transformer output circuit
Power supply output.
A kind of 9. Three phase electrical energy meter electricity source circuit according to claim 1, which is characterized in that the front-end protection electricity
Road includes three power resistor RTa1, RTa2, RTa3, described power resistor RTa1, RTa2, RTa3 respectively with firewire VA ends, fire
Line VB ends, the connection of firewire VC ends.
A kind of 10. Three phase electrical energy meter electricity source circuit according to claim 1, which is characterized in that the front-end protection
Circuit further includes three varistors RVa1, RVa2, RVa3, described varistor RVa1 one end, RVa2 one end, RVa3 one end point
It is not connected with firewire VA ends, firewire VB ends, firewire VC ends, the varistor RVa1 other ends, the RVa2 other ends, RVa3 are another
End is connected with zero curve N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447168.7A CN108092529A (en) | 2017-12-27 | 2017-12-27 | A kind of Three phase electrical energy meter electricity source circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447168.7A CN108092529A (en) | 2017-12-27 | 2017-12-27 | A kind of Three phase electrical energy meter electricity source circuit |
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| CN108092529A true CN108092529A (en) | 2018-05-29 |
Family
ID=62179838
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711447168.7A Pending CN108092529A (en) | 2017-12-27 | 2017-12-27 | A kind of Three phase electrical energy meter electricity source circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048622A (en) * | 2019-04-17 | 2019-07-23 | 深圳龙电电气股份有限公司 | A kind of power circuit and three-phase kilowatt-hour meter system for electric energy meter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811993U (en) * | 2010-07-30 | 2011-04-27 | 武汉盛帆电子股份有限公司 | Three-phase four-line low-power energy meter with switching power supply |
| CN203243226U (en) * | 2013-04-11 | 2013-10-16 | 杭州海兴电力科技股份有限公司 | Switch power source |
| CN104953863A (en) * | 2015-06-04 | 2015-09-30 | 重庆华虹仪表有限公司 | Switching power circuit for power supply of three-phase electric energy meter |
| CN107070259A (en) * | 2016-12-13 | 2017-08-18 | 浙江恒业电子有限公司 | Power circuit for electric energy meter |
| CN207753631U (en) * | 2017-12-27 | 2018-08-21 | 浙江恒业电子有限公司 | A kind of Three phase electrical energy meter electricity source circuit |
-
2017
- 2017-12-27 CN CN201711447168.7A patent/CN108092529A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811993U (en) * | 2010-07-30 | 2011-04-27 | 武汉盛帆电子股份有限公司 | Three-phase four-line low-power energy meter with switching power supply |
| CN203243226U (en) * | 2013-04-11 | 2013-10-16 | 杭州海兴电力科技股份有限公司 | Switch power source |
| CN104953863A (en) * | 2015-06-04 | 2015-09-30 | 重庆华虹仪表有限公司 | Switching power circuit for power supply of three-phase electric energy meter |
| CN107070259A (en) * | 2016-12-13 | 2017-08-18 | 浙江恒业电子有限公司 | Power circuit for electric energy meter |
| CN207753631U (en) * | 2017-12-27 | 2018-08-21 | 浙江恒业电子有限公司 | A kind of Three phase electrical energy meter electricity source circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048622A (en) * | 2019-04-17 | 2019-07-23 | 深圳龙电电气股份有限公司 | A kind of power circuit and three-phase kilowatt-hour meter system for electric energy meter |
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