CN104880604A - Electric energy meter supply circuit and electric energy meter employing same - Google Patents
Electric energy meter supply circuit and electric energy meter employing same Download PDFInfo
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Abstract
The invention provides an electric energy meter supply circuit and an electric energy meter employing the same. The circuit comprises a main power supply which supplies power to the electric energy meter. The circuit also comprises an energy storage circuit, a first battery circuit, and a second battery circuit. The energy storage circuit is charged through the main power supply, and supplies power to a working circuit of the electric energy meter when the main power supply is cut off. The first battery circuit supplies power to the working circuit when the main power supply is cut off and the energy storage circuit cannot carry out power supply. The second battery circuit supplies power to the working circuit when the main power supply is cut off, the energy storage circuit cannot carry out power supply and the first battery circuit cannot carry out power supply. According to the invention, a technical problem that the reliability of power supply of the electric energy meter in the prior art is poor.
Description
Technical field
The present invention relates to power technique fields, be specifically related to electric energy meter feed circuit and use the electric energy meter of this circuit.
Background technology
Along with the development of economic society, electric system produces major transformation, contacting between electric power networks and power consumer is more and more tightr, in addition the pay attention to day by day of society to environmental problem, various new and renewable sources of energy is also more and more employed, and intelligent grid has become the inexorable trend of future electrical energy net development.And the visual plant in the intelligent electric energy meter senior measuring system that is intelligent grid.Intelligent electric energy meter is the electric energy measurement instrument with electric energy metrical, information Storage and Processing, network service, Real-Time Monitoring, the automatically function such as control and information interaction.Many experts and scholar think, in every technology of intelligent grid, the research of intelligent electric energy meter should preferentially be carried out.
The definition that intelligent electric energy meter is normally such: using MCU as main function components, real-time calculating, backup, parsing there is the measurement instrument of autonomous analysis power can be carried out to energy information.In general, the ability of intelligent electric energy meter to the acquisition and processing aspect of data is very outstanding, and this is also the initial responsibility that it is endowed as electric energy meter.On the other hand, it also has certain intelligent, can carry out showing and operating, can carry out man-machine interaction.Be more than the concept of intelligent instrument, on this basis, the concept of intelligent electric energy meter is just apparent, and namely for measuring the intelligent instrument of electric energy, setting forth further, is namely the electric multi-functional electric energy meter of core with microprocessor.In recent years, the function of intelligent electric energy meter was more comprehensive, also comprised having communication function, have multi-user's function of measuring, can measuring etc. specific user.
In current electric energy meter design proposal, rely on Clock battery and provide low-power dissipation power supply when having a power failure to MCU and clock, during power cut-off recording, input (button or infrared input) by outside and wake MCU up, then open by MCU battery of checking meter, meter-reading function is provided.But once Clock battery does not have electricity, MCU will lose the job power supply, cannot open battery of checking meter to provide meter-reading function, also can cause clock entanglement in addition, visible, the Power supply poor reliability of current electric energy meter.
Summary of the invention
For this reason, technical matters to be solved by this invention is that the electric energy meter electric source power supply reliability of prior art is poor, thus proposes solve the electric energy meter feed circuit of this problem and use the electric energy meter of this circuit.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of electric energy meter feed circuit, comprise the primary power of powering to described electric energy meter, also comprise tank circuit, first battery circuit and the second battery circuit, described tank circuit is charged by described primary power, described tank circuit powers to when described primary power source de-energizes the operating circuit of described electric energy meter, described first battery circuit in described primary power source de-energizes and described tank circuit can not be powered time give described operating circuit power, described second battery circuit in described primary power source de-energizes and described tank circuit can not power and described first battery circuit can not be powered time give described operating circuit power.
Preferably, described tank circuit comprises the first gauge tap circuit, the second gauge tap circuit and capacitor charging discharging circuit, described capacitor charging discharging circuit connects described primary power by described first gauge tap circuit, the charging of described capacitor charging discharging circuit given by described primary power when described first gauge tap circuit turn-on, described capacitor charging discharging circuit also connects described operating circuit by described second gauge tap circuit, and described capacitor charging discharging circuit powers to when described second gauge tap circuit turn-on described operating circuit.
Further, described capacitor charging discharging circuit comprises storage capacitor C94, electric capacity C101 and resistance R64, storage capacitor C94 positive terminal connects described first gauge tap circuit by resistance R64, storage capacitor C94 positive terminal also connects described second gauge tap circuit, storage capacitor C94 negative pole end ground connection, electric capacity C101 is in parallel with storage capacitor C94.
Further, described first gauge tap circuit comprises triode V2, triode V4, resistance R96, resistance R109 and resistance R112, triode V2 collector connects described capacitor charging discharging circuit, triode V2 emitter connects described primary power, triode V2 base stage is by resistance R96 connecting triode V4 collector, triode V4 grounded emitter, triode V4 base stage connects the first control level by resistance R109, resistance R112 one end connects described first control level, resistance R112 other end ground connection, described first control level is high level or low level.
Further, described second gauge tap circuit comprises triode V12, triode V14, resistance R130, resistance R134, resistance R147, resistance R149, diode D31 and electric capacity C102, triode V12 emitter connects described capacitor charging discharging circuit, triode V12 emitter is also by resistance R130 connecting triode V14 collector, triode V12 base stage is by resistance R134 connecting triode V14 collector, triode V12 collector connects diode D31 anode, diode D31 negative electrode connects described operating circuit, electric capacity C102 one end connects diode D31 negative electrode, electric capacity C102 other end ground connection, triode V14 grounded emitter, triode V14 base stage connects the second control level by resistance R147, resistance R149 one end connects described second control level, resistance R149 other end ground connection, described second control level is high level or low level.
Preferably, described first battery circuit comprises voltage-regulating circuit and the 3rd gauge tap circuit, described voltage-regulating circuit connects described operating circuit by described 3rd gauge tap circuit, and described voltage-regulating circuit powers to when the 3rd gauge tap circuit turn-on described operating circuit.
Further, described voltage-regulating circuit comprises battery G2, diode D1, voltage adjuster U4, electric capacity C61, resistance R17 and resistance R89, battery G2 connects diode D1 anode, diode D1 negative electrode connects the input end of voltage adjuster U4, the earth terminal ground connection of voltage adjuster U4, the Enable Pin contact resistance R17 of voltage adjuster U4, resistance R17 is by resistance R89 ground connection, resistance R17 is connected the 3rd control level with the link of resistance R89, electric capacity C61 is connected in parallel between the output and ground of voltage adjuster U4, the output terminal of voltage adjuster U4 connects described 3rd gauge tap circuit, described 3rd control level is high level or low level.
Further, described 3rd gauge tap circuit comprises triode V23, triode V10, resistance R95, resistance R144 and resistance R16, triode V23 emitter connects described voltage-regulating circuit, triode V23 emitter is also by resistance R95 connecting triode V10 collector, triode V23 base stage is by resistance R144 connecting triode V10 collector, triode V23 collector connects described operating circuit, triode V10 grounded emitter, triode V10 base stage connects the 4th control level by resistance R16, and described 4th control level is high level or low level.
Preferably, described second battery circuit comprises cell voltage circuit and the 4th gauge tap circuit, described cell voltage circuit connects described operating circuit by described 4th gauge tap circuit, and described cell voltage circuit powers to when described 4th gauge tap circuit turn-on described operating circuit.
The present invention also provides a kind of electric energy meter, comprises the electric energy meter feed circuit described in technique scheme.
Technique scheme of the present invention has the following advantages compared to existing technology:
1, electric energy meter feed circuit of the present invention are when primary power source de-energizes, powered to the operating circuit of electric energy meter by tank circuit, when tank circuit can not be powered, powered to operating circuit by the first battery circuit again, it is last when the first battery circuit can not be powered, powered to operating circuit by the second battery circuit, electric energy meter power supply reliability can be improved like this.Because tank circuit can be charged by primary power, like this when primary power source de-energizes interval is shorter, just can ensure that electric energy meter is powered reliably by tank circuit, do not need the first battery circuit, the follow-up participation power supply of the second battery circuit, reduce the kwh loss of the first battery circuit and the second battery circuit, not only good economy performance, and improve electric energy meter power supply reliability further.
2, the tank circuit in electric energy meter feed circuit of the present invention comprises the first gauge tap circuit, the second gauge tap circuit and capacitor charging discharging circuit, primary power can be controlled by the first gauge tap circuit to charge to capacitor charging discharging circuit, can be powered to operating circuit by control capacitance charge-discharge circuit by second switch circuit, make to be powered to the operating circuit of electric energy meter by capacitor charging discharging circuit when primary power source de-energizes, thus improve electric energy meter power supply reliability.In addition, capacitor charging discharging circuit is powered to operating circuit, when primary power restores electricity, then is charged by primary power, and electric energy has can complementarity, does not need to change circuit devcie, good in economic efficiency, reduces costs.
3, the first battery circuit in electric energy meter feed circuit of the present invention comprises voltage-regulating circuit and the 3rd gauge tap circuit, because tank circuit charge capacity is limited, the time continuing to power to the operating circuit of electric energy meter can not be oversize, like this, in primary power source de-energizes and tank circuit can not be powered time, can be powered to the operating circuit of electric energy meter by the 3rd gauge tap circuit control voltages Circuit tuning, improve electric energy meter power supply reliability further.
4, the second battery circuit in electric energy meter feed circuit of the present invention comprises cell voltage circuit and the 4th gauge tap circuit, in primary power source de-energizes and tank circuit can not power and the first battery circuit can not be powered time, can be powered to the operating circuit of electric energy meter by the 4th gauge tap control circui cell voltage circuit, further improve electric energy meter power supply reliability.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the electric energy meter feed circuit of the embodiment of the present invention 1;
Fig. 2 is the circuit diagram of the tank circuit of the electric energy meter feed circuit of the embodiment of the present invention 1;
Fig. 3 is the circuit diagram of the first battery circuit of the electric energy meter feed circuit of the embodiment of the present invention 1;
Fig. 4 is the circuit diagram of the second battery circuit of the electric energy meter feed circuit of the embodiment of the present invention 1.
Embodiment
Embodiment 1
Fig. 1 shows a kind of electric energy meter feed circuit of the embodiment of the present invention, and these electric energy meter feed circuit comprise primary power 11, tank circuit 12, first battery circuit 13 and second battery circuit 14 of powering to electric energy meter 21.
Tank circuit 12 is charged by primary power 11, the operating circuit 211 of tank circuit 12 when primary power 11 power-off to electric energy meter 21 is powered, first battery circuit 13 in primary power 11 power-off and tank circuit 12 can not be powered time power to operating circuit 211, the second battery circuit 14 in primary power 11 power-off and tank circuit 12 can not power and the first battery circuit 13 can not be powered time power to operating circuit 211.Operating circuit 211 can comprise control chip circuit, clock circuit and circuit of checking meter, and in other embodiments, operating circuit 211 can select the required part or all of circuit that works in electric energy meter as required.Described control chip circuit, described clock circuit and described circuit of checking meter are the common circuit in electric energy meter.Preferably, described control chip circuit can be CPU or SOC and peripheral interface thereof, described clock circuit can be RX8025T clock chip circuit, described in circuit of checking meter can comprise external memory storage, liquid crystal display, infrared receiving/transmission circuit, computation chip.
The electric energy meter feed circuit of the present embodiment are when primary power 11 power-off, power to the operating circuit 211 of electric energy meter 21 by tank circuit 12, when tank circuit 12 can not be powered, power to operating circuit 211 by the first battery circuit 13 again, it is last when the first battery circuit 13 can not be powered, power to operating circuit 211 by the second battery circuit 14, electric energy meter power supply reliability can be improved like this.Because tank circuit 12 can be charged by primary power 11, like this when primary power 11 power-off interval is shorter, just can ensure that electric energy meter is powered reliably by tank circuit 12, do not need the follow-up participation power supply of the first battery circuit 13, second battery circuit 14, reduce the kwh loss of the first battery circuit 13 and the second battery circuit 14, not only good economy performance, and improve electric energy meter power supply reliability further.
Particularly, tank circuit 12 can comprise the first gauge tap circuit 121, second gauge tap circuit 122 and capacitor charging discharging circuit 123, capacitor charging discharging circuit 123 connects primary power 11 by the first gauge tap circuit 121, primary power 11 charges to capacitor charging discharging circuit 123 when the first gauge tap circuit 121 conducting, capacitor charging discharging circuit 123 also connects operating circuit 211 by the second gauge tap circuit 122, and capacitor charging discharging circuit 123 is powered to operating circuit 211 when the second gauge tap circuit 122 conducting.Like this, primary power 11 can be controlled by the first gauge tap circuit 121 to charge to capacitor charging discharging circuit 123, can power to operating circuit 211 by control capacitance charge-discharge circuit 123 by second switch circuit 122, make to be powered to the operating circuit 211 of electric energy meter 21 by capacitor charging discharging circuit 123 when primary power 11 power-off, thus improve electric energy meter power supply reliability.In addition, capacitor charging discharging circuit 123 powers to operating circuit 211, when primary power 11 restores electricity, then is charged by primary power 11, and electric energy has can complementarity, does not need to change circuit devcie, good in economic efficiency, reduces costs.
First battery circuit 13 can comprise voltage-regulating circuit 131 and the 3rd gauge tap circuit 132, voltage-regulating circuit 131 connects operating circuit 211 by the 3rd gauge tap circuit 132, and voltage-regulating circuit 131 is powered to operating circuit 211 when the 3rd gauge tap circuit 132 conducting.Because tank circuit 12 charge capacity is limited, the time continuing to power to the operating circuit 211 of electric energy meter 21 can not be oversize, like this, in primary power 11 power-off and tank circuit 12 can not be powered time, can power to the operating circuit 211 of electric energy meter 21 by the 3rd gauge tap circuit 132 control voltage Circuit tuning 131, improve electric energy meter power supply reliability further.
Second battery circuit 14 can comprise cell voltage circuit 141 and the 4th gauge tap circuit 142, cell voltage circuit 141 connects operating circuit 211 by the 4th gauge tap circuit 142, and cell voltage circuit 141 is powered to operating circuit 211 when the 4th gauge tap circuit 142 conducting.Like this, in primary power 11 power-off and tank circuit 12 can not power and the first battery circuit 13 can not be powered time, cell voltage circuit 141 can be controlled by the 4th gauge tap circuit 142 to power to the operating circuit 211 of electric energy meter 21, further improve electric energy meter power supply reliability.
As shown in Figure 2, as preferred embodiment, capacitor charging discharging circuit 123 comprises storage capacitor C94, electric capacity C101 and resistance R64, storage capacitor C94 positive terminal connects the first gauge tap circuit 121 by resistance R64, storage capacitor C94 positive terminal also connects the second gauge tap circuit 122, storage capacitor C94 negative pole end ground connection, electric capacity C101 is in parallel with storage capacitor C94.Like this, during the first gauge tap circuit 121 conducting, primary power 11 can charge to storage capacitor C94 through resistance R64, and when second controls optical circuit 122 conducting, storage capacitor C94 powers to the operating circuit 211 of electric energy meter 21.In addition, due to storage capacitor C94 also shunt capacitance C101, make stable charge/discharge better like this.
First gauge tap circuit 121 comprises triode V2, triode V4, resistance R96, resistance R109 and resistance R112, triode V2 collector connects capacitor charging discharging circuit 123, triode V2 emitter connects primary power 11, triode V2 base stage is by resistance R96 connecting triode V4 collector, triode V4 grounded emitter, triode V4 base stage connects the first control level crl1 by resistance R109, resistance R112 one end connects the first control level crl1, resistance R112 other end ground connection, the first control level crl1 is high level or low level.When the first control level crl1 is high level, triode V4 conducting, and triode V4 conducting, primary power 11 charges to capacitor charging discharging circuit 123; When the first control level crl1 is low level, triode V4 turns off, and triode V2 turns off, and primary power 11 stops charging to capacitor charging discharging circuit 123.By the two-stage power control structure of triode V2 and triode V4, make the switching of turn-on and turn-off state more stable.
Second gauge tap circuit 122 comprises triode V12, triode V14, resistance R130, resistance R134, resistance R147, resistance R149, diode D31 and electric capacity C102, triode V12 emitter connects capacitor charging discharging circuit 123, triode V12 emitter is also by resistance R130 connecting triode V14 collector, triode V12 base stage is by resistance R134 connecting triode V14 collector, triode V12 collector connects diode D31 anode, diode D31 negative electrode connects operating circuit 211, electric capacity C102 one end connects diode D31 negative electrode, electric capacity C102 other end ground connection, triode V14 grounded emitter, triode V14 base stage connects the second control level crl2 by resistance R147, resistance R149 one end connects the second control level crl2, resistance R149 other end ground connection, second control level crl2 is high level or low level.The second control level crl2 is made to be high level when primary power 11 power-off, triode V14 conducting, and triode V12 conducting, capacitor charging discharging circuit 123 powers to operating circuit 211; When second control level crl2 is low level, triode V14 turns off, and triode V12 turns off, and capacitor charging discharging circuit 123 stops powering to operating circuit 211.By the two-stage power control structure of triode V14 and triode V12, make the switching of turn-on and turn-off state more stable.Arranging of diode D31 can prevent the electric current of operating circuit 211 from pouring in down a chimney, and improves circuit reliability.The supply voltage that electric capacity C102 can filter from capacitor charging discharging circuit 123 is shaken, and improves for electrical stability.
As shown in Figure 3, as preferred embodiment, voltage-regulating circuit 132 comprises battery G2, diode D1, voltage adjuster U4, electric capacity C61, resistance R17 and resistance R89, battery G2 connects diode D1 anode, diode D1 negative electrode connects the input end IN of voltage adjuster U4, the earth terminal GND ground connection of voltage adjuster U4, the Enable Pin EN contact resistance R17 of voltage adjuster U4, resistance R17 is by resistance R89 ground connection, resistance R17 is connected the 3rd control level crl3 with the link of resistance R89, electric capacity C61 is connected in parallel between the output terminal OUT of voltage adjuster U4 and earth terminal GND, the output terminal OUT of voltage adjuster U4 connects the 3rd gauge tap circuit 131, 3rd control level crl3 is high level or low level.Voltage adjuster U4 can adopt XC6413/14 series.When 3rd control level crl3 is high level, voltage adjuster U4 normally works, and exports reliable source of power; When 3rd control level crl3 is low level, voltage adjuster U4 closes, and stops out-put supply.Because electric capacity C61 is connected in parallel between the output terminal OUT of voltage adjuster U4 and earth terminal GND, like this can the fluctuation of filtering voltage adjuster U4 output supply voltage, improve for electrical stability.
3rd gauge tap circuit 131 comprises triode V23, triode V10, resistance R95, resistance R144 and resistance R16, triode V23 emitter connects voltage-regulating circuit 132, triode V23 emitter is also by resistance R95 connecting triode V10 collector, triode V23 base stage is by resistance R144 connecting triode V10 collector, triode V23 collector connects operating circuit 211, triode V10 grounded emitter, triode V10 base stage connects the 4th control level crl4 by resistance R16, and the 4th control level crl4 is high level or low level.In primary power 11 power-off and tank circuit 12 can not be powered time make the 4th control level crl4 be high level, triode V10 conducting, and triode V23 conducting, voltage-regulating circuit 132 powers to operating circuit 211; When 4th control level crl4 is low level, triode V10 turns off, and triode V23 turns off, and voltage-regulating circuit 132 stops powering to operating circuit 211.By the two-stage power control structure of triode V23 and triode V10, make the switching of turn-on and turn-off state more stable.
As shown in Figure 4, as preferred embodiment, cell voltage circuit 141 comprises battery G1, diode D5.4th gauge tap circuit 142 comprises field effect transistor V22, diode D33, diode D34, voltage-level detector U15, electric capacity C42, electric capacity C45, resistance R69 and resistance R74.Battery G1 connects diode D5 anode, diode D5 negative electrode connects field effect transistor V22 drain electrode, field effect transistor V22 source electrode connects operating circuit 211, field effect transistor V22 grid connects voltage-level detector U15 output end vo ut, voltage-level detector U15 earth terminal Vss ground connection, difference shunt capacitance C42 and resistance R74 between voltage-level detector U15 output end vo ut and earth terminal Vss, shunt capacitance C45 between voltage-level detector U15 input end Vin and earth terminal Vss, voltage-level detector U15 input end Vin connects diode D33 negative electrode and diode D34 negative electrode respectively, voltage-level detector U15 output end vo ut connects diode D33 negative electrode and diode D34 negative electrode respectively by resistance R69.Diode D33 anode connects the first battery circuit 13, connects the output terminal OUT of the voltage adjuster U4 of the voltage-regulating circuit 132 of the first battery circuit 13 specifically, and diode D34 anode connects primary power 11.Wherein voltage-level detector U15 can adopt HT70 series.In primary power 11 power-off and tank circuit 12 can not power and the first battery circuit 13 can not be powered time, the supply voltage of the first battery circuit 13 and primary power 11 is all lower than the detected voltage V of voltage-level detector U15
dET(voltage V can be detected
dETthe parameter of voltage-level detector U15), voltage-level detector U15 output low level, field effect transistor V22 conducting, battery G1 powers to operating circuit 211, thus improves electric energy meter power supply reliability.
Embodiment 2
The embodiment of the present invention 2 provides a kind of electric energy meter, comprises the electric energy meter feed circuit described in embodiment 1.The electric energy meter of the present embodiment is when primary power 11 power-off, power to the operating circuit of electric energy meter by tank circuit 12, when tank circuit 12 can not be powered, power to described operating circuit by the first battery circuit 13 again, it is last when the first battery circuit 13 can not be powered, power to described operating circuit by the second battery circuit 14, improve electric energy meter power supply reliability.Because tank circuit 12 can be charged by primary power 11, when primary power 11 power-off interval is shorter, just can ensure that described electric energy meter is powered reliably by tank circuit 12, do not need the follow-up participation power supply of the first battery circuit 13, second battery circuit 14, reduce the kwh loss of the first battery circuit 13 and the second battery circuit 14, not only good economy performance, and improve electric energy meter power supply reliability further.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. electric energy meter feed circuit, comprise the primary power of powering to described electric energy meter, it is characterized in that: also comprise tank circuit, first battery circuit and the second battery circuit, described tank circuit is charged by described primary power, described tank circuit powers to when described primary power source de-energizes the operating circuit of described electric energy meter, described first battery circuit in described primary power source de-energizes and described tank circuit can not be powered time give described operating circuit power, described second battery circuit in described primary power source de-energizes and described tank circuit can not power and described first battery circuit can not be powered time give described operating circuit power.
2. electric energy meter feed circuit according to claim 1, it is characterized in that: described tank circuit comprises the first gauge tap circuit, second gauge tap circuit and capacitor charging discharging circuit, described capacitor charging discharging circuit connects described primary power by described first gauge tap circuit, the charging of described capacitor charging discharging circuit given by described primary power when described first gauge tap circuit turn-on, described capacitor charging discharging circuit also connects described operating circuit by described second gauge tap circuit, described capacitor charging discharging circuit powers to when described second gauge tap circuit turn-on described operating circuit.
3. electric energy meter feed circuit according to claim 2, it is characterized in that: described capacitor charging discharging circuit comprises storage capacitor C94, electric capacity C101 and resistance R64, storage capacitor C94 positive terminal connects described first gauge tap circuit by resistance R64, storage capacitor C94 positive terminal also connects described second gauge tap circuit, storage capacitor C94 negative pole end ground connection, electric capacity C101 is in parallel with storage capacitor C94.
4. electric energy meter feed circuit according to claim 2, it is characterized in that: described first gauge tap circuit comprises triode V2, triode V4, resistance R96, resistance R109 and resistance R112, triode V2 collector connects described capacitor charging discharging circuit, triode V2 emitter connects described primary power, triode V2 base stage is by resistance R96 connecting triode V4 collector, triode V4 grounded emitter, triode V4 base stage connects the first control level by resistance R109, resistance R112 one end connects described first control level, resistance R112 other end ground connection, described first control level is high level or low level.
5. electric energy meter feed circuit according to claim 2, it is characterized in that: described second gauge tap circuit comprises triode V12, triode V14, resistance R130, resistance R134, resistance R147, resistance R149, diode D31 and electric capacity C102, triode V12 emitter connects described capacitor charging discharging circuit, triode V12 emitter is also by resistance R130 connecting triode V14 collector, triode V12 base stage is by resistance R134 connecting triode V14 collector, triode V12 collector connects diode D31 anode, diode D31 negative electrode connects described operating circuit, electric capacity C102 one end connects diode D31 negative electrode, electric capacity C102 other end ground connection, triode V14 grounded emitter, triode V14 base stage connects the second control level by resistance R147, resistance R149 one end connects described second control level, resistance R149 other end ground connection, described second control level is high level or low level.
6. electric energy meter feed circuit according to claim 1, it is characterized in that: described first battery circuit comprises voltage-regulating circuit and the 3rd gauge tap circuit, described voltage-regulating circuit connects described operating circuit by described 3rd gauge tap circuit, and described voltage-regulating circuit powers to when the 3rd gauge tap circuit turn-on described operating circuit.
7. electric energy meter feed circuit according to claim 6, it is characterized in that: described voltage-regulating circuit comprises battery G2, diode D1, voltage adjuster U4, electric capacity C61, resistance R17 and resistance R89, battery G2 connects diode D1 anode, diode D1 negative electrode connects the input end of voltage adjuster U4, the earth terminal ground connection of voltage adjuster U4, the Enable Pin contact resistance R17 of voltage adjuster U4, resistance R17 is by resistance R89 ground connection, resistance R17 is connected the 3rd control level with the link of resistance R89, electric capacity C61 is connected in parallel between the output and ground of voltage adjuster U4, the output terminal of voltage adjuster U4 connects described 3rd gauge tap circuit, described 3rd control level is high level or low level.
8. electric energy meter feed circuit according to claim 6, it is characterized in that: described 3rd gauge tap circuit comprises triode V23, triode V10, resistance R95, resistance R144 and resistance R16, triode V23 emitter connects described voltage-regulating circuit, triode V23 emitter is also by resistance R95 connecting triode V10 collector, triode V23 base stage is by resistance R144 connecting triode V10 collector, triode V23 collector connects described operating circuit, triode V10 grounded emitter, triode V10 base stage connects the 4th control level by resistance R16, described 4th control level is high level or low level.
9. electric energy meter feed circuit according to claim 1, it is characterized in that: described second battery circuit comprises cell voltage circuit and the 4th gauge tap circuit, described cell voltage circuit connects described operating circuit by described 4th gauge tap circuit, and described cell voltage circuit powers to when described 4th gauge tap circuit turn-on described operating circuit.
10. an electric energy meter, is characterized in that, comprises the electric energy meter feed circuit described in any one of claim 1-9.
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| CN201510324530.6A CN104880604B (en) | 2015-06-12 | 2015-06-12 | Electric energy meter power supply circuit and the electric energy meter using the circuit |
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| CN201510324530.6A CN104880604B (en) | 2015-06-12 | 2015-06-12 | Electric energy meter power supply circuit and the electric energy meter using the circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106157594A (en) * | 2016-08-12 | 2016-11-23 | 北京溢美四方软件技术有限公司 | The intelligent electric meter communication unit of a kind of built-in stand-by power supply and control method |
| CN109193925A (en) * | 2018-11-20 | 2019-01-11 | 北京千丁互联科技有限公司 | Electric power management circuit |
| CN111525542A (en) * | 2020-03-26 | 2020-08-11 | 江阴长仪集团有限公司 | Power supply method for safely storing data of intelligent electric energy meter |
| CN113825040A (en) * | 2021-09-06 | 2021-12-21 | 贵州电网有限责任公司 | Automatic meter reading system capable of preventing power failure |
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| CN113825040B (en) * | 2021-09-06 | 2023-11-10 | 贵州电网有限责任公司 | Automatic meter reading system capable of preventing power failure |
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| CN104880604B (en) | 2017-10-10 |
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Address after: Zhengtai Instrument Measurement Industrial Park, No.1 Liangce Road, Beibaixiang Town, Leqing City, Wenzhou City, Zhejiang Province, 325603 Patentee after: ZHEJIANG CHINT INSTRUMENT & METER Co.,Ltd. Address before: 325603 Wenzhou Daqiao Industrial Park, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG CHINT INSTRUMENT & METER Co.,Ltd. |