CN202256492U - Direct-current-direct current (DC-DC)-based resistance-capacitance single-phase charge control intelligent electric energy meter - Google Patents
Direct-current-direct current (DC-DC)-based resistance-capacitance single-phase charge control intelligent electric energy meter Download PDFInfo
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- CN202256492U CN202256492U CN2011203379793U CN201120337979U CN202256492U CN 202256492 U CN202256492 U CN 202256492U CN 2011203379793 U CN2011203379793 U CN 2011203379793U CN 201120337979 U CN201120337979 U CN 201120337979U CN 202256492 U CN202256492 U CN 202256492U
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Abstract
The utility model relates to a single-phase charge control intelligent electric energy meter, and provides a direct current-direct current (DC-DC) conversion and resistance-capacitance voltage reduction principle-based single-phase charge control intelligent electric energy meter utilizing a power supply scheme, which comprises a power supply module, a single chip central processing unit and a single-phase charge control intelligent electric energy meter basic functional module, wherein the power supply module comprises a resistance-capacitance voltage reduction circuit and a DC-DC switch power supply circuit, the output end of the resistance-capacitance voltage reduction circuit is connected with the input end of the DC-DC switch power supply circuit, the output end of the DC-DC switch power supply circuit is respectively connected with the single chip central processing unit and the working voltage end of the single-phase charge control intelligent electric energy meter basic functional module. The power supply scheme combines the resistance-capacitance voltage reduction principle and the DC-DC conversion technology, so the power supply efficiency can be effectively improved, the self power consumption of the electric energy meter can be reduced, and the requirements on the energy conservation and environmental protection can be satisfied.
Description
Technical field
The utility model relates to a kind of single-phase expense control intelligent electric energy meter, and particularly a kind of power source design uses the single-phase control intelligent electric energy meter that takes based on DC-DC (DC-DC) conversion and resistance-capacitance depressurization principle.
Background technology
In the existing single-phase power source design that takes the control intelligent electric energy meter, the Switching Power Supply scheme that generally adopts transformer scheme or adopt the switching power source chip by special use to constitute.The former volume is bigger, and efficient is lower, causes the electric energy meter power consumption big and complete machine is heavier; Though the latter has the advantage of high-level efficiency and low-power consumption, receive the restriction of switching power source chip, cost is higher.More than two kinds of common scheme all have certain drawback, can not satisfy of the requirement of single-phase expense control intelligent electric energy meter fully to power source design.
Summary of the invention
The purpose of the utility model is exactly in order to overcome above-mentioned weak point of the prior art; And the single-phase expense control of a kind of resistance-capacitance type based on DC-DC intelligent electric energy meter is provided; Power source design combines resistance-capacitance depressurization principle and DC-DC converter technique; Effectively improve power-efficient, reduce the electric energy meter oneself power consumption, satisfy energy conservation and environment protection.
The purpose of the utility model realizes through following technical measures: based on the single-phase expense control of the resistance-capacitance type of DC-DC intelligent electric energy meter; Comprise power module, single-chip microcomputer CPU and single-phase expense control intelligent electric energy meter basic function module; Said power module comprises resistance-capacitance depressurization circuit and DC-DC switching power circuit; The output terminal of said resistance-capacitance depressurization circuit links to each other with the input end of DC-DC switching power circuit, and the output terminal of DC-DC switching power circuit links to each other with the WV end of single-chip microcomputer CPU with single-phase expense control intelligent electric energy meter basic function module respectively.
In technique scheme, said DC-DC switching power circuit comprises capacitor C 4 ~ capacitor C 8, resistance R 2 ~ resistance R 6, switching mode diode D3, compound diode D4, diode D5, comparer U1A, high isolating transformer T1 and FET Q1; DC voltage VDD is connected to 2 pin of transformer T1 primary coil; DC voltage VDD is connected to 3 pin of comparer U1A through resistance R 2; DC voltage VDD is connected to 1 pin of comparer U1A through resistance R 6, and resistance R 4 is connected between 1 pin and 3 pin of comparer U1A, and resistance R 3 is connected between 3 pin and VSS of comparer U1A; Resistance R 5 is connected between 2 pin and 1 pin of comparer U1A, and the 2 foot meridian capacitor C5 of comparer U1A are connected to VSS; 8 pin of comparer U1A are connected to DC voltage VDD, and 4 pin of comparer U1A are connected to VSS; The grid of FET Q1 is connected to 1 pin of comparer U1A, and the source electrode of FET Q1 is connected to VSS, and the drain electrode of FET Q1 is connected to 3 pin of transformer T1; Switching mode diode D3 is connected between 1 pin and VSS of transformer T1; Capacitor C 4 is connected between DC voltage VDD and the VSS; 7 pin of first secondary coil of transformer T1 are output dc voltage VCC1 after commutation diode D5 rectification; 6 pin of first secondary coil are connected to GND1; Capacitor C 6 is connected in parallel between voltage VCC1 and the GND1, and 5 pin of the second subprime coil of transformer T1 are difference output dc voltage VCC2 and VCC after compound diode D4 rectification, and 4 pin of second subprime coil are connected to GND; Capacitor C 7 is connected in parallel between voltage VCC and the GND, and capacitor C 8 is connected in parallel between voltage VCC2 and the GND.
In technique scheme, said DC-DC switching power circuit comprises capacitor C 9 ~ capacitor C 12, resistance R 7, resistance R 8, triode BG1, triode BG2, retarder winding T2, compound diode D6; DC voltage VDD is connected to the emitter of triode BG2, and the base stage of BG2 is connected to 5 pin of the elementary winding of retarder winding T2, and the collector of BG2 is connected to 2 pin of T2; DC voltage VDD is connected to the emitter of triode BG1, and the base stage of BG2 is connected to 6 pin of T2, and the collector of BG2 is connected to 3 pin of winding T2; Be connected after resistance R 7 and capacitor C 10 parallel connections between 4 pin and 1 pin of T2; Capacitor C 9 is connected between DC voltage VDD and the VSS; 8 pin of winding T2 secondary winding and 9 pin are output dc voltage VCC3 after compound diode D6 rectification, and 7 pin of winding T2 are connected to GND, and resistance R 8 is connected between VCC3 and the GND, and electrochemical capacitor C12 and capacitor C 11 are connected in parallel on resistance R 8 two ends.
In technique scheme, said resistance-capacitance depressurization circuit comprises voltage dependent resistor (VDR) ZR1, resistance R 1, capacitor C 1 ~ capacitor C 3, rectifier bridge D1, inductance L 1, inductance L 2, voltage stabilizing diode D2; Live wire input L holds 4 pin that are connected to rectifier bridge D1 through resistance R 1 and capacitor C 1, and zero line input N end is connected to 3 pin of rectifier bridge D1, and voltage dependent resistor (VDR) ZR1 is connected live wire input L and zero line is imported between the N; Output dc voltage signal VDD between output terminal 1 pin of rectifier bridge D1 and 2 pin, 1 pin of rectifier bridge D1 is connected to the input end of said DC-DC switching power circuit through inductance L 1, and 2 pin of rectifier bridge D1 are connected to VSS through inductance L 2; Capacitor C 2 is connected the output terminal of rectifier bridge D1, and capacitor C 3 is connected in parallel on the two ends of capacitor C 2, and voltage stabilizing diode D2 is connected in parallel between DC voltage VDD and the VSS.
The advantage of the utility model is: under the prerequisite that guarantees original single-phase expense control intelligent electric energy meter performance, power source design combines resistance-capacitance type decompression principle and DC-DC converter technique, effectively raises power-efficient, realizes low-power consumption, low cost; Adopt the resistance-capacitance depressurization scheme in the power supply, reach the wide-voltage range of 65V ~ 490V, simultaneously the mains by harmonics environment is also had some improvement, reached energy conservation and environment protection, meet the energy-saving and cost-reducing development trend of electric energy meter.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model based on the single-phase expense control of the resistance-capacitance type of DC-DC intelligent electric energy meter.
Fig. 2 is the circuit connection diagram of DC-DC switching power circuit one in the utility model.
Fig. 3 is the circuit connection diagram of DC-DC switching power circuit two in the utility model.
Fig. 4 is the circuit connection diagram of resistance-capacitance depressurization circuit in the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
As shown in Figure 1; The utility model embodiment provides the single-phase expense control of a kind of resistance-capacitance type based on DC-DC intelligent electric energy meter; Comprise power module, single-chip microcomputer CPU and single-phase expense control intelligent electric energy meter basic function module; Its said power module comprises resistance-capacitance depressurization circuit and DC-DC translation circuit; The output terminal of said resistance-capacitance depressurization circuit is held with the input end of DC-DC translation circuit mutually, and the output terminal of DC-DC translation circuit links with the WV end of single-chip microcomputer CPU and single-phase expense control intelligent electric energy meter basic function module respectively.
In technique scheme, this instructions provides two kinds of embodiments of DC-DC switching power circuit, promptly constitutes the embodiment one and embodiment two of the utility model.
As shown in Figure 2, be the circuit connection diagram of DC-DC switching power circuit embodiment one.Said DC-DC switching power circuit comprises: capacitor C 4 ~ capacitor C 8, resistance R 2 ~ resistance R 6, switching mode diode D3, compound diode D4, diode D5, comparer U1A, high isolating transformer T1 and FET Q1.DC voltage VDD is connected to 2 pin of transformer T1 primary coil; DC voltage VDD is connected to 3 pin of comparer U1A through resistance R 2; DC voltage VDD is connected to 1 pin of comparer U1A through resistance R 6; Resistance R 4 is connected between 1 pin and 3 pin of comparer U1A; Resistance R 3 is connected between 3 pin and VSS of comparer U1A, and resistance R 5 is connected between 2 pin and 1 pin of comparer U1A, and the 2 foot meridian capacitor C5 of comparer U1A are connected to VSS; 8 pin of comparer U1A are connected to DC voltage VDD, and 4 pin of comparer U1A are connected to VSS; The grid of FET Q1 is connected to 1 pin of comparer U1A, and the source electrode of FET Q1 is connected to VSS, and the drain electrode of FET Q1 is connected to 3 pin of transformer T1; Switching mode diode D3 is connected between 1 pin and VSS of transformer T1; Capacitor C 4 is connected between DC voltage VDD and the VSS.7 pin of first secondary coil of transformer T1 are output dc voltage VCC1 after commutation diode D5 rectification, and 6 pin of first secondary coil are connected to GND1, and capacitor C 6 is connected in parallel between voltage VCC1 and the GND1; 5 pin of the second subprime coil of transformer T1 are difference output dc voltage VCC2 and VCC after compound diode D4 rectification; 4 pin of second subprime coil are connected to GND; Capacitor C 7 is connected in parallel between voltage VCC and the GND, and capacitor C 8 is connected in parallel between voltage VCC2 and the GND.
As shown in Figure 3, be the circuit connection diagram of DC-DC switching power circuit embodiment two.Said DC-DC switching power circuit comprises: capacitor C 9 ~ capacitor C 12, resistance R 7, resistance R 8, triode BG1, triode BG2, retarder winding T2, compound diode D6.DC voltage VDD is connected to the emitter of triode BG2, and the base stage of BG2 is connected to 5 pin of the elementary winding of retarder winding T2, and the collector of BG2 is connected to 2 pin of T2; DC voltage VDD is connected to the emitter of triode BG1, and the base stage of BG2 is connected to 6 pin of T2, and the collector of BG2 is connected to 3 pin of T2; Be connected after resistance R 7 and capacitor C 10 parallel connections between 4 pin and 1 pin of T2; Capacitor C 9 is connected between DC voltage VDD and the VSS; 8 pin of T2 secondary winding and 9 pin are output dc voltage VCC3 after compound diode D6 rectification, and 7 pin of T2 are connected to GND, and resistance R 8 is connected between VCC3 and the GND, and electrochemical capacitor C12 and capacitor C 11 are connected in parallel on resistance R 8 two ends.
As shown in Figure 4, be the circuit connection diagram of resistance-capacitance depressurization circuit in the utility model.Said resistance-capacitance depressurization circuit comprises: voltage dependent resistor (VDR) ZR1, resistance R 1, capacitor C 1 ~ capacitor C 3, rectifier bridge D1, inductance L 1, inductance L 2, voltage stabilizing diode D2.Live wire input L end is connected to 4 pin of rectifier bridge D1 through resistance R 1 and capacitor C 1, and zero line input N end is connected to 3 pin of rectifier bridge D1, and voltage dependent resistor (VDR) ZR1 is connected between live wire input L end and the zero line input N end; Output dc voltage signal VDD between output terminal 1 pin of rectifier bridge D1 and 2 pin, 1 pin of rectifier bridge D1 is connected to the input end of said DC-DC switching power circuit through inductance L 1, and 2 pin of rectifier bridge D1 are connected to VSS through inductance L 2; Capacitor C 2 is connected the output terminal of rectifier bridge D1 as filter capacitor, and capacitor C 3 is connected in parallel on the two ends of capacitor C 2, and voltage stabilizing diode D2 is connected in parallel between DC voltage VDD and the VSS.
In the utility model embodiment one, alternating voltage is output as DC voltage VDD after the rectification of resistance-capacitance depressurization circuit; DC voltage VDD is through resistance R 2, resistance R 4 and 5 chargings of 5 pairs of capacitor C of resistance R, and when the 2 pin voltages of comparer U1A were lower than 3 pin voltages, 1 pin of comparer U1A was exported high level, FET Q1 conducting, the elementary connection of transformer T1; When the 2 pin place voltages of comparer U1A are higher than 3 pin voltages, the 1 pin output low level of comparer U1A, FET Q1 turn-offs, and makes the elementary disconnection of transformer T1.Transformer T1 primary coil switch produces alternating electromagnetic field and makes the input direct current signal become switching voltage signal.The switching voltage signal DC voltage that output needs after rectifies, capacitor C 6 ~ capacitor C 8 is filter capacitor, and basic function module and single-chip microcomputer CPU that DC voltage is respectively single-phase expense control intelligent electric energy meter provide normal working voltage.
In the utility model embodiment two, alternating voltage is output as DC voltage VDD after the rectification of resistance-capacitance depressurization circuit; The conducting of DC voltage VDD through triode BG1, triode BG2 with end; On retarder winding T2, form the electric current that constantly changes; Export proportional electric current through electromagnetic induction at the out secondary of retarder winding T2; And through compound diode D6 rectification, the DC voltage VCC3 that output needs after capacitor C 11 and the electrochemical capacitor C12 filtering, basic function module and single-chip microcomputer CPU that DC voltage is respectively single-phase expense control intelligent electric energy meter provide normal working voltage.Said capacitor C 10 is used to adjust the time of said triode BG1 and triode BG2 conducting, thereby reaches peak use rate to reduce loss.
The content that this instructions is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (4)
1. based on the single-phase control intelligent electric energy meter that takes of the resistance-capacitance type of DC-DC; Comprise power module, single-chip microcomputer CPU and single-phase expense control intelligent electric energy meter basic function module; It is characterized in that: said power module comprises resistance-capacitance depressurization circuit and DC-DC switching power circuit; The output terminal of said resistance-capacitance depressurization circuit links to each other with the input end of DC-DC switching power circuit, and the output terminal of DC-DC switching power circuit links to each other with the WV end of single-chip microcomputer CPU with single-phase expense control intelligent electric energy meter basic function module respectively.
2. the single-phase control intelligent electric energy meter that takes of the resistance-capacitance type based on DC-DC according to claim 1; It is characterized in that: said DC-DC switching power circuit comprises capacitor C 4 ~ capacitor C 8, resistance R 2 ~ resistance R 6, switching mode diode D3; Compound diode D4; Diode D5, comparer U1A, high isolating transformer T1 and FET Q1; DC voltage VDD is connected to 2 pin of transformer T1 primary coil; DC voltage VDD is connected to 3 pin of comparer U1A through resistance R 2; DC voltage VDD is connected to 1 pin of comparer U1A through resistance R 6, and resistance R 4 is connected between 1 pin and 3 pin of comparer U1A, and resistance R 3 is connected between 3 pin and VSS of comparer U1A; Resistance R 5 is connected between 2 pin and 1 pin of comparer U1A, and the 2 foot meridian capacitor C5 of comparer U1A are connected to VSS; 8 pin of comparer U1A are connected to DC voltage VDD, and 4 pin of comparer U1A are connected to VSS; The grid of FET Q1 is connected to 1 pin of comparer U1A, and the source electrode of FET Q1 is connected to VSS, and the drain electrode of FET Q1 is connected to 3 pin of transformer T1; Switching mode diode D3 is connected between 1 pin and VSS of transformer T1; Capacitor C 4 is connected between DC voltage VDD and the VSS; 7 pin of first secondary coil of transformer T1 are output dc voltage VCC1 after commutation diode D5 rectification; 6 pin of first secondary coil are connected to GND1; Capacitor C 6 is connected in parallel between voltage VCC1 and the GND1, and 5 pin of the second subprime coil of transformer T1 are difference output dc voltage VCC2 and VCC after compound diode D4 rectification, and 4 pin of second subprime coil are connected to GND; Capacitor C 7 is connected in parallel between voltage VCC and the GND, and capacitor C 8 is connected in parallel between voltage VCC2 and the GND.
3. the single-phase control intelligent electric energy meter that takes of the resistance-capacitance type based on DC-DC according to claim 1, it is characterized in that: said DC-DC switching power circuit comprises capacitor C 9 ~ capacitor C 12, resistance R 7; Resistance R 8; Triode BG1, triode BG2, retarder winding T2, compound diode D6; DC voltage VDD is connected to the emitter of triode BG2, and the base stage of BG2 is connected to 5 pin of the elementary winding of retarder winding T2, and the collector of BG2 is connected to 2 pin of T2; DC voltage VDD is connected to the emitter of triode BG1, and the base stage of BG2 is connected to 6 pin of T2, and the collector of BG2 is connected to 3 pin of winding T2; Be connected after resistance R 7 and capacitor C 10 parallel connections between 4 pin and 1 pin of T2; Capacitor C 9 is connected between DC voltage VDD and the VSS; 8 pin of winding T2 secondary winding and 9 pin are output dc voltage VCC3 after compound diode D6 rectification, and 7 pin of winding T2 are connected to GND, and resistance R 8 is connected between VCC3 and the GND, and electrochemical capacitor C12 and capacitor C 11 are connected in parallel on resistance R 8 two ends.
4. according to claim 2 or the single-phase control intelligent electric energy meter that takes of 3 described resistance-capacitance types based on DC-DC, it is characterized in that: said resistance-capacitance depressurization circuit comprises voltage dependent resistor (VDR) ZR1, resistance R 1; Capacitor C 1 ~ capacitor C 3; Rectifier bridge D1, inductance L 1, inductance L 2, voltage stabilizing diode D2; Live wire input L holds 4 pin that are connected to rectifier bridge D1 through resistance R 1 and capacitor C 1, and zero line input N end is connected to 3 pin of rectifier bridge D1, and voltage dependent resistor (VDR) ZR1 is connected live wire input L and zero line is imported between the N; Output dc voltage signal VDD between output terminal 1 pin of rectifier bridge D1 and 2 pin, 1 pin of rectifier bridge D1 is connected to the input end of said DC-DC switching power circuit through inductance L 1, and 2 pin of rectifier bridge D1 are connected to VSS through inductance L 2; Capacitor C 2 is connected the output terminal of rectifier bridge D1, and capacitor C 3 is connected in parallel on the two ends of capacitor C 2, and voltage stabilizing diode D2 is connected in parallel between DC voltage VDD and the VSS.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203379793U CN202256492U (en) | 2011-09-09 | 2011-09-09 | Direct-current-direct current (DC-DC)-based resistance-capacitance single-phase charge control intelligent electric energy meter |
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| CN2011203379793U CN202256492U (en) | 2011-09-09 | 2011-09-09 | Direct-current-direct current (DC-DC)-based resistance-capacitance single-phase charge control intelligent electric energy meter |
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| CN202256492U true CN202256492U (en) | 2012-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426289A (en) * | 2011-09-09 | 2012-04-25 | 武汉盛帆电子股份有限公司 | DC-DC-based resistance-capacitance single-phase cost control intelligent electric energy meter |
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2011
- 2011-09-09 CN CN2011203379793U patent/CN202256492U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426289A (en) * | 2011-09-09 | 2012-04-25 | 武汉盛帆电子股份有限公司 | DC-DC-based resistance-capacitance single-phase cost control intelligent electric energy meter |
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Granted publication date: 20120530 Termination date: 20140909 |
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