CN206807114U - The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter - Google Patents
The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter Download PDFInfo
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- CN206807114U CN206807114U CN201720504089.4U CN201720504089U CN206807114U CN 206807114 U CN206807114 U CN 206807114U CN 201720504089 U CN201720504089 U CN 201720504089U CN 206807114 U CN206807114 U CN 206807114U
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- super capacitor
- control circuit
- optocoupler
- triode
- phase intelligent
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Abstract
It the utility model is related to a kind of full decompression detection metering chip power supply circuit of three-phase intelligent ammeter, three-phase intelligent ammeter includes MCU module and metering module, metering module includes voltage sampling unit and current sampling unit, the super capacitor and super capacitor control circuit for controlling super capacitor discharge and recharge that computation chip is connected with computation chip, super capacitor is connected with the operating voltage end of computation chip, and super capacitor control circuit is connected with MCU module.During computation chip normal work, super capacitor control circuit control super capacitor is charged；During ammeter power down, super capacitor control circuit control super capacitor is discharged, and caused voltage supplies computation chip, is allowed to after ammeter power down a period of time that can still work.The utility model remains to the detection for completing the full decompression event of ammeter in ammeter power down by controlling the discharge and recharge of super capacitor to realize, avoids battery undervoltage influence reliability and replacing battery in battery powered scheme and the problem of potential safety hazard be present.
Description
Technical field
A kind of three-phase intelligent ammeter is the utility model is related to, more particularly to a kind of full decompression detection of three-phase intelligent ammeter is used tricks
Measure chip power supply circuit.
Background technology
The 12nd technical committee (abbreviation TC12) " electrical measuring instrument of OIML (hereinafter referred to as OIML)
In October, 2012, approval has issued International Recommendation 46 (hereinafter referred to as technical committee "
IR46)《Active electric energy meter》Standard, as OIML member states, the ammeter of China's manufacture must be adopted and perform this standard.
IR46 standards require electric energy meter electronic equipment and components apart, and function of measuring module and other functional modules are separate, non-meter
The change of amount partial software online upgrading or hardware does not influence the Stability and veracity of metering section.One of metering section
Critical function is that computation chip can detect whether that full decompression event occurs in a period of time after ammeter power down.If using tradition
Method is powered by battery to metering module, then because many reasons such as battery quality itself and whole table power dissipation design usually can
Battery undervoltage phenomenon is caused, so as to influence the reliability of metering section.In addition, metering section also includes current sample and voltage is adopted
Sample, that is to say, that metering module and forceful electric power link together, and IR46 standards require that the battery to metering module power supply can
Change, then change battery and there is potential safety hazard.
The content of the invention
The utility model mainly solves original powered by battery to metering module and realizes the full decompression event detection of ammeter
Scheme, often resulting in battery undervoltage influences metering section reliability, and changes the technical problem that battery has potential safety hazard；There is provided
A kind of full decompression detection metering chip power supply circuit of three-phase intelligent ammeter, its by control the discharge and recharge of super capacitor realize to
Metering module is powered, and so as to realize the detection of the full decompression event of ammeter, avoiding battery undervoltage influences reliability and change battery
The problem of potential safety hazard be present, effectively improve the reliability and security of three-phase intelligent ammeter.
Above-mentioned technical problem of the present utility model is mainly what is be addressed by following technical proposals：It is of the present utility model
The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter, three-phase intelligent ammeter include MCU module and metering module, institute
The metering module stated includes computation chip, voltage sampling unit, current sampling unit, super capacitor C1 and control super capacitor C1
The super capacitor control circuit of discharge and recharge, voltage sampling unit, current sampling unit are connected with the input of computation chip respectively,
Super capacitor C1 is connected with the operating voltage end of computation chip, and super capacitor control circuit is connected with described MCU module.Work as meter
When measuring chip normal work, MCU module is signaled to super capacitor control circuit, under the control of super capacitor control circuit
Super capacitor C1 is charged.In ammeter power down, MCU module is signaled to super capacitor control circuit, in super electricity
Hold makes super capacitor C1 be discharged under the control of control circuit, the work of voltage supply computation chip caused by super capacitor electric discharge
Make voltage end, can still be worked a period of time so as to ensure computation chip after ammeter power down, can at least work one minute, then count
Amount chip can start to check full decompression event and carry out timing, and voltage sampling unit, current sampling unit detect voltage, electricity respectively
Signal is flowed, if continued 1 minute voltage less than the full decompression threshold value set, while electric current would be more than 5% specified (basic) electric current, meter
Amount chip will be recorded as once full decompression event, hereafter no longer detect the event until upper electricity.In the technical program, work as ammeter
During power down, super capacitor can be continuously available to operating voltage required by computation chip more than 1 minute, ensure computation chip energy
Normal work at least 1 minute, so as to complete the detection of the full decompression of three-phase intelligent ammeter, meet the related technical requirements of IR46.This
Technical scheme, which avoids battery undervoltage influence reliability and changes battery, has the problem of potential safety hazard, effectively improves three-phase intelligent
The reliability and security of ammeter.
Preferably, described super capacitor control circuit includes the super capacitor being connected respectively with described super capacitor
Charging control circuit and super capacitor charge/discharge control circuit；Super capacitor charging control circuit includes optocoupler U1 and triode Q1,
The positive pole of optocoupler U1 emitting side is connected with the output end CTL1 of described MCU module, and the negative pole of optocoupler U1 emitting side is through electricity
Resistance R1 meets earth terminal GND1, and base stage of the C poles of optocoupler U1 receiving side through resistance R2 with triode Q1 is connected, optocoupler U1 reception
The E poles of side meet earth terminal GND, and triode Q1 emitter stage meets voltage V1, and triode Q1 colelctor electrode is through resistance R3 and resistance R4
Parallel circuit be connected with super capacitor C1 positive pole, super capacitor C1 negative pole meets earth terminal GND.MCU module passes through optocoupler
U1 controls triode Q1 whether conducting.During computation chip normal work, super capacitor charge/discharge control circuit does not work, MCU moulds
The output end CTL1 output high level of block, controls triode Q1 conductings, then voltage V1 passes through resistance R3 and resistance by optocoupler U1
R4 charges to super capacitor C1.The technical program circuit is simple, easy to control, also acts as buffer action, improves reliability.
Preferably, described super capacitor charge/discharge control circuit includes optocoupler U2 and triode Q2, optocoupler U2 transmitting
The positive pole of side is connected with the output end CTL2 of described MCU module, and the negative pole of optocoupler U2 emitting side connects earth terminal through resistance R6
GND1, base stage of the C poles of optocoupler U2 receiving side through resistance R5 with triode Q2 are connected, and the E poles of optocoupler U2 receiving side connect
Ground terminal GND, triode Q2 emitter stage are connected with super capacitor C1 positive pole, triode Q2 colelctor electrode and described metering core
The operating voltage end V2 of piece is connected.When ammeter power down, super capacitor charging control circuit does not work, the output end of MCU module
CTL2 exports high level, and triode Q2 conducting is controlled by optocoupler U2, then super capacitor by triode Q2 to computation chip
Operating voltage end V2 powers, so as to ensure that computation chip can still work a period of time after ammeter power down, at least one minute, complete
The detection of the full decompression of ammeter.The technical program circuit is simple, easy to control, also acts as buffer action, improves reliability.
Preferably, described super capacitor charge/discharge control circuit includes diode D, diode D positive pole and triode
Q2 colelctor electrode is connected, and diode D negative pole is connected with the operating voltage end of described computation chip.When super capacitor discharges,
Powered by triode Q2 and diode D to the operating voltage end V2 of computation chip.Further improve reliability.
Preferably, the 220VAC input powers of described three-phase intelligent ammeter are through power conversion unit and described metering
Module is connected, and the 220VAC input powers of three-phase intelligent ammeter are connected through power conversion isolated location with described MCU module.Three
The input power of phase intelligent electric meter is 220VAC forceful electric power, and MCU module is isolated with forceful electric power, and metering module is not isolated with forceful electric power
, meet the related technical requirements of IR46.If battery is used to be powered to computation chip to realize the detection of the full decompression of ammeter, more
The potential safety hazard of electric shock is there is when changing battery.And use super capacitor to be powered to computation chip, it just completely avoid this peace
Full hidden danger.
Preferably, electrical isolation unit is provided between described MCU module and described metering module.Meet IR46 phases
The technical requirements of pass, improve the reliability of ammeter.
The beneficial effects of the utility model are：By controlling the discharge and recharge of super capacitor to realize in ammeter power down to metering
Chip continued power for a period of time, so as to complete the detection of the full decompression event of ammeter, avoids conventional method and is battery powered and deposit
Battery undervoltage influence reliability and change battery the problem of potential safety hazard be present, effectively improve the reliable of three-phase intelligent ammeter
Property and security, and compared to traditional battery powered scheme, small volume shared by super capacitor is easy to whole table to be laid out, cost
Relatively low, in normal voltage range, discharge and recharge number is more than more than 50000 times, and operating temperature is wide, good reliability.
Brief description of the drawings
Fig. 1 is a kind of circuit theory connection block diagram of the present utility model.
Fig. 2 is a kind of circuit theory diagrams of super capacitor control circuit in the utility model.
1.MCU modules in figure, 2. metering modules, 3. computation chips, 4. voltage sampling units, 5. current sampling units, 6.
Super capacitor control circuit, 7.220VAC input powers, 8. power conversion units, 9. power conversion isolated locations, 10. electrically every
From unit.
Embodiment
Below by embodiment, and with reference to accompanying drawing, the technical solution of the utility model is described in further detail.
Embodiment：The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter of the present embodiment, as shown in figure 1,
Three-phase intelligent ammeter includes MCU module 1 and metering module 2, and metering module 2 includes computation chip 3, voltage sampling unit 4, electric current
Sampling unit 5, super capacitor C1 and the super capacitor control circuit 6 for controlling super capacitor C1 discharge and recharges, voltage sampling unit 4,
Input of the current sampling unit 5 respectively with computation chip 3 is connected, the operating voltage end V2 of super capacitor C1 and computation chip 3
It is connected, super capacitor control circuit 6 is connected with MCU module 1.There is electrical isolation unit 10 between MCU module 1 and metering module 2
Carry out electrical isolation.The 220VAC input powers 7 of three-phase intelligent ammeter are connected through power conversion unit 8 with metering module 2, pass through
Metering module is powered after power conversion；The 220VAC input powers 7 of three-phase intelligent ammeter are through power conversion isolated location 9
It is connected with MCU module 1, by being powered after power conversion and isolated from power to MCU module.
As shown in Fig. 2 super capacitor control circuit 6 includes the super capacitor charge control being connected respectively with super capacitor C1
Circuit and super capacitor charge/discharge control circuit.Super capacitor charging control circuit includes optocoupler U1 and triode Q1, optocoupler U1's
The positive pole of emitting side is connected with the output end CTL1 of MCU module 1, and the negative pole of optocoupler U1 emitting side connects earth terminal through resistance R1
GND1, base stage of the C poles of optocoupler U1 receiving side through resistance R2 with triode Q1 are connected, and the E poles of optocoupler U1 receiving side connect
Ground terminal GND, triode Q1 emitter stage meet voltage V1, parallel circuit of the triode Q1 colelctor electrode through resistance R3 and resistance R4 and
Super capacitor C1 positive pole is connected, and super capacitor C1 negative pole meets earth terminal GND.Super capacitor charge/discharge control circuit includes optocoupler
U2, triode Q2 and diode D, the positive pole of optocoupler U2 emitting side are connected with the output end CTL2 of MCU module 1, optocoupler U2's
The negative pole of emitting side connects earth terminal GND1, base stage of the C poles through resistance R5 and triode Q2 of optocoupler U2 receiving side through resistance R6
It is connected, the E poles of optocoupler U2 receiving side meet earth terminal GND, and triode Q2 emitter stage is connected with super capacitor C1 positive pole, and three
Pole pipe Q2 colelctor electrode is connected with diode D positive pole, and diode D negative pole is connected with the operating voltage end V2 of computation chip 3.
The course of work：MCU module controls whether triode Q1, triode Q2 turn on by optocoupler U1, optocoupler U2.Metering core
During piece normal work, the output end CTL1 output high level of MCU module, triode Q1 conductings, MCU module are controlled by optocoupler U1
Output end CTL2 output low levels, triode Q2 cut-off is controlled by optocoupler U2, then voltage V1 passes through resistance R3 and resistance R4
Charged to super capacitor C1.When ammeter power down, the output end CTL1 output low levels of MCU module, three are controlled by optocoupler U1
Pole pipe Q1 ends, and the output end CTL2 output high level of MCU module, controls triode Q2 conductings by optocoupler U2, then super electricity
Hold and powered by triode Q2 and diode D to the operating voltage end V2 of computation chip, so as to ensure metering core after ammeter power down
Piece can still work a period of time, select the capacity and resistance R3, resistance R4 resistance of suitable super capacitor, it can be ensured that metering
Chip can continue normal work at least one minute, so as to complete the detection of the full decompression of ammeter.
The utility model circuit is simple, easy to control, by controlling the discharge and recharge of super capacitor to realize in ammeter power down
To computation chip continued power for a period of time, so as to complete the detection of the full decompression event of ammeter, conventional method is avoided by battery
Battery undervoltage existing for power supply influences reliability and replacing battery has the problem of potential safety hazard, while there is isolation well to make
With, the reliability and security of three-phase intelligent ammeter are effectively improved, and compared to traditional battery powered scheme, super capacitor
Shared small volume, be easy to whole table to be laid out, cost is relatively low, in normal voltage range, discharge and recharge number more than more than 50000 times,
Operating temperature is wide, good reliability.
Claims (6)
1. a kind of full decompression detection metering chip power supply circuit of three-phase intelligent ammeter, three-phase intelligent ammeter include MCU module (1)
With metering module (2), it is characterised in that described metering module (2) includes computation chip (3), voltage sampling unit (4), electric current
Sampling unit (5), super capacitor C1 and the super capacitor control circuit (6) for controlling super capacitor C1 discharge and recharges, voltage sample list
The input of first (4), current sampling unit (5) respectively with computation chip (3) is connected, super capacitor C1 and computation chip (3)
Operating voltage end is connected, and super capacitor control circuit (6) is connected with described MCU module (1).
2. the full decompression detection metering chip power supply circuit of three-phase intelligent ammeter according to claim 1, it is characterised in that
Described super capacitor control circuit (6) includes the super capacitor charging control circuit being connected respectively with described super capacitor C1
With super capacitor charge/discharge control circuit；Super capacitor charging control circuit includes optocoupler U1 and triode Q1, optocoupler U1 transmitting
The positive pole of side is connected with the output end CTL1 of described MCU module (1), and the negative pole of optocoupler U1 emitting side is grounded through resistance R1
GND1 is held, base stage of the C poles of optocoupler U1 receiving side through resistance R2 with triode Q1 is connected, and the E poles of optocoupler U1 receiving side connect
Earth terminal GND, triode Q1 emitter stage connect voltage V1, triode Q1 parallel circuit of the colelctor electrode through resistance R3 and resistance R4
It is connected with super capacitor C1 positive pole, super capacitor C1 negative pole meets earth terminal GND.
3. the full decompression detection metering chip power supply circuit of three-phase intelligent ammeter according to claim 2, it is characterised in that
Described super capacitor charge/discharge control circuit includes optocoupler U2 and triode Q2, the positive pole of optocoupler U2 emitting side and described
The output end CTL2 of MCU module (1) is connected, and the negative pole of optocoupler U2 emitting side meets earth terminal GND1 through resistance R6, optocoupler U2's
Base stage of the C poles of receiving side through resistance R5 with triode Q2 is connected, and the E poles of optocoupler U2 receiving side connect earth terminal GND, triode
Q2 emitter stage is connected with super capacitor C1 positive pole, the work electricity of triode Q2 colelctor electrode and described computation chip (3)
Pressure side V2 is connected.
4. the full decompression detection metering chip power supply circuit of three-phase intelligent ammeter according to claim 3, it is characterised in that
Described super capacitor charge/discharge control circuit includes diode D, and diode D positive pole is connected with triode Q2 colelctor electrode, and two
Pole pipe D negative pole is connected with the operating voltage end of described computation chip (3).
5. the full decompression detection metering chip power supply circuit of three-phase intelligent ammeter according to claim 1, it is characterised in that
The 220VAC input powers (7) of described three-phase intelligent ammeter are through power conversion unit (8) and described metering module (2) phase
Even, the 220VAC input powers (7) of three-phase intelligent ammeter are through power conversion isolated location (9) and described MCU module (1) phase
Even.
6. the full decompression detection metering chip power supply circuit of three-phase intelligent ammeter according to claim 1 or 2 or 5, it is special
Sign is to be provided with electrical isolation unit (10) between described MCU module (1) and described metering module (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504089.4U CN206807114U (en) | 2017-05-08 | 2017-05-08 | The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720504089.4U CN206807114U (en) | 2017-05-08 | 2017-05-08 | The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter |
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| CN206807114U true CN206807114U (en) | 2017-12-26 |
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| CN201720504089.4U Expired - Fee Related CN206807114U (en) | 2017-05-08 | 2017-05-08 | The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918960A (en) * | 2018-06-19 | 2018-11-30 | 宁波迦南智能电气股份有限公司 | It is a kind of to measure and the completely isolated intelligent electric energy meter of management function |
| CN109239454A (en) * | 2018-10-09 | 2019-01-18 | 沃尔特电子（苏州）有限公司 | A kind of direct current energy meter of automotive grade |
| CN110248452A (en) * | 2019-06-10 | 2019-09-17 | 海洋王（东莞）照明科技有限公司 | A kind of explosion-proof lamp control circuit and system |
| CN111413541A (en) * | 2020-04-22 | 2020-07-14 | 上海国泉科技有限公司 | Metering circuit of ammeter and ammeter |
| 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 |
| CN112230033A (en) * | 2020-05-06 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Electricity larceny prevention design under power failure state of electric energy meter |
-
2017
- 2017-05-08 CN CN201720504089.4U patent/CN206807114U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918960A (en) * | 2018-06-19 | 2018-11-30 | 宁波迦南智能电气股份有限公司 | It is a kind of to measure and the completely isolated intelligent electric energy meter of management function |
| CN109239454A (en) * | 2018-10-09 | 2019-01-18 | 沃尔特电子（苏州）有限公司 | A kind of direct current energy meter of automotive grade |
| CN110248452A (en) * | 2019-06-10 | 2019-09-17 | 海洋王（东莞）照明科技有限公司 | A kind of explosion-proof lamp control circuit and system |
| 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 |
| CN111413541A (en) * | 2020-04-22 | 2020-07-14 | 上海国泉科技有限公司 | Metering circuit of ammeter and ammeter |
| CN112230033A (en) * | 2020-05-06 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Electricity larceny prevention design under power failure state of electric energy meter |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20180508 |