CN108983141A - The DC voltage and ripple voltage synthesizer of direct current energy meter - Google Patents
The DC voltage and ripple voltage synthesizer of direct current energy meter Download PDFInfo
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- CN108983141A CN108983141A CN201810424616.XA CN201810424616A CN108983141A CN 108983141 A CN108983141 A CN 108983141A CN 201810424616 A CN201810424616 A CN 201810424616A CN 108983141 A CN108983141 A CN 108983141A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of DC voltage of direct current energy meter and ripple voltage synthesizer, including DC voltage source, ripple voltage source, AC-DC coupling unit, voltage output unit, human-computer interface control unit and to above-mentioned each electrical appliance the Auxiliary Power Units of working power are provided.The DC voltage source includes the first communication unit, signal generating circuit, the first power amplification circuit, the first feed circuit, isolation boosting unit and rectification output unit.The ripple voltage source includes the second communication unit, wave generator circuit, the second power amplification circuit, the second feed circuit, isolation output unit.The DC voltage and ripple voltage synthesizer of direct current energy meter disclosed by the invention generate the output signal containing DC voltage and programmable ripple voltage by DC voltage source, ripple voltage source and the isolation coupling technology independently exported.
Description
Technical field
The invention belongs to DC voltage source technical fields in direct-current electric energy meter calibrating device, and in particular to a kind of direct current energy
The DC voltage and ripple voltage synthesizer of table.
Background technique
Currently with the fast development of electric car industry and a large amount of construction of direct-current charging post, the application of direct current energy meter
It is more and more extensive；It has issued state type direct current energy meter national standard in May, 2017, and has implemented December, filled as direct current
The metering core of electric stake, the requirement to direct current energy metering is higher and higher, how to measure and evaluate DC ripple to electric energy meter
It influences, straight electric energy meter calibrating apparatus used at present does not have test condition mostly, can not fully meet direct current energy meter calibrating
Needs.
For this reason, it is necessary to propose a kind of synthesis of novel direct-current electric energy meter calibrating device DC voltage circuit superposition ripple
Method meets DC voltage ripple and tests the influence amount of direct current energy meter.
Summary of the invention
The present invention is directed to the situation of the prior art, provides a kind of DC voltage of direct current energy meter and ripple voltage synthesizes dress
It sets, DC voltage source and ripple voltage source is provided, DC voltage source exports accuracy height, and stability is good, ripple voltage source frequency
With the program-controlled output of amplitude.
The present invention uses following technical scheme, and DC voltage and the ripple voltage synthesizer of the direct current energy meter include
DC voltage source, ripple voltage source, AC-DC coupling unit, voltage output unit, human-computer interface control unit and to above-mentioned
Each electrical appliance provides the Auxiliary Power Units of working power, in which:
The DC voltage source includes the first communication unit, signal generating circuit, the first power amplification circuit, the first feedback
Circuit, isolation boosting unit and rectification output unit, in which:
One end of first communication unit is connected with signal generating circuit, the other end of first communication unit and people
The internal communication circuit of machine interface control unit is connected, and first communication unit is used to receive the control of man-machine interface control unit
System order, so that signal generating circuit generates corresponding ac small signal；
The output end of the signal generating circuit is connected with the input terminal of the first power amplification circuit, and first power is put
The output end of big circuit is connected with the input terminal of isolation boosting unit, the input terminal and isolation boosting list of first feed circuit
Member output end be connected, the output end of first feed circuit is connected with the input terminal of the first power amplification circuit, it is described every
Output end from boosting unit is connected with the input terminal of rectification output unit；
The ripple voltage source includes the second communication unit, wave generator circuit, the second power amplification circuit, the second feedback
Circuit, isolation output unit, in which:
One end of second communication unit is connected with wave generator circuit, the other end of second communication unit and people
The internal communication circuit of machine interface control unit is connected, and second communication unit is used to receive the control of man-machine interface control unit
System order, so that wave generator circuit generates the corresponding small signal of ripple；
The output end of the wave generator circuit is connected with the input terminal of the second power amplification circuit, and second power is put
The output end of big circuit is connected with the input terminal that output unit be isolated, and the input terminal of second feed circuit exports singly with being isolated
The output end of member is connected, and the output end of second feed circuit is connected with the input terminal of the second power amplification circuit.
Preferably, the output end of rectification output unit of the DC voltage source and the isolation in ripple voltage source export list
The output end of member is connected with the input terminal of AC-DC coupling unit simultaneously, and the output end and voltage of the AC-DC coupling unit are defeated
The input terminal of unit is connected out, and the output end of the voltage output unit is connected with external terminal, contains ripple component with output
D. c. voltage signal.
Preferably, the human-computer interface control unit while the first communication unit and ripple voltage with DC voltage source
Second communication unit in source is connected, and the human-computer interface control unit passes through double between DC voltage source and ripple voltage source
The direct voltage output of voltage output unit is controlled to communication.
Preferably, the DC voltage of the direct current energy meter and ripple voltage synthesizer further include display unit, key
Disk unit, the human-computer interface control unit are connected with display unit and keyboard unit simultaneously, the human-computer interface control unit
Voltage output parameter is set by keyboard unit, the human-computer interface control unit shows that voltage output is joined by display unit
Number.
Preferably, above-mentioned voltage output parameter includes ripple frequency and amplitude.
Preferably, the DC voltage of the direct current energy meter and ripple voltage synthesizer further include that third communication is single
Member, the human-computer interface control unit are connected by third communication unit with PC machine end, and the human-computer interface control unit passes through
Third communication unit obtains the control command that PC machine end issues, and the human-computer interface control unit is issued according to above-mentioned PC machine end
Control command adjusts voltage output parameter.
Preferably, above-mentioned voltage output parameter includes ripple frequency and amplitude.
Preferably, the signal generating circuit includes CPU, D/A conversion chip, voltage reference chip and accurate operation
Amplifier.
Preferably, the human-computer interface control unit includes ARM industrial control board and liquid crystal display.
Preferably, the AC-DC coupling unit includes isolating transformer.
The DC voltage and ripple voltage synthesizer of direct current energy meter disclosed by the invention, the beneficial effect is that, lead to
The DC voltage source independently exported, ripple voltage source and isolation coupling technology are crossed, generates and contains DC voltage and programmable line
The output signal of wave voltage.
Detailed description of the invention
Fig. 1 is the functional block diagram of the preferred embodiment of the present invention.
Appended drawing reference includes: 1- DC voltage source；The first communication unit of 11-；12- signal generating circuit；The first power of 13-
Amplifying circuit；14- isolation boosting unit；The first feed circuit of 15-；16- rectifies output unit；2- ripple voltage source；21- second
Communication unit；22- wave generator circuit；The second power amplification circuit of 23-；Output unit is isolated in 24-；The second feed circuit of 25-；
3- AC coupled unit；4- voltage output unit；5- human-computer interface control unit；6- third communication unit；7- display unit；8-
Keyboard unit.
Specific embodiment
The invention discloses a kind of DC voltages of direct current energy meter and ripple voltage synthesizer, below with reference to preferred reality
Example is applied, further description of the specific embodiments of the present invention.
Referring to Figure 1 of the drawings, Fig. 1 shows the DC voltage of the direct current energy meter and the work of ripple voltage synthesizer
Make principle.
Preferably, the DC voltage of the direct current energy meter and ripple voltage synthesizer include DC voltage source 1, ripple
It voltage source 2, AC-DC coupling unit 3, voltage output unit 4, human-computer interface control unit 5 and is mentioned to above-mentioned each electrical appliance
For the Auxiliary Power Units (not shown) of working power, in which:
The DC voltage source 1 include the first communication unit 11, signal generating circuit 12, the first power amplification circuit 13,
First feed circuit 15, isolation boosting unit 14 and rectification output unit 16, in which:
One end of first communication unit 11 is connected with signal generating circuit 12, first communication unit 11 it is another
End is connected with the internal communication circuit of human-computer interface control unit 5, and first communication unit 11 is for receiving man-machine interface control
The control command of unit 5 processed, so that signal generating circuit 12 generates corresponding ac small signal；
The output end of the signal generating circuit 12 is connected with the input terminal of the first power amplification circuit 13, first function
The output end of rate amplifying circuit 13 is connected with the input terminal of isolation boosting unit 14, the input terminal of first feed circuit 15 with
The output end of isolation boosting unit 14 is connected, and the output end of first feed circuit 15 is defeated with the first power amplification circuit 13
Enter end to be connected, the output end of the isolation boosting unit 14 is connected with the input terminal of rectification output unit 16；
The ripple voltage source 2 include the second communication unit 21, wave generator circuit 22, the second power amplification circuit 23,
Second feed circuit 25, isolation output unit 24, in which:
One end of second communication unit 21 is connected with wave generator circuit 22, second communication unit 21 it is another
End is connected with the internal communication circuit of human-computer interface control unit 5, and second communication unit 21 is for receiving man-machine interface control
The control command of unit 5 processed, so that wave generator circuit 22 generates the small signal of corresponding ripple；
The output end of the wave generator circuit 22 is connected with the input terminal of the second power amplification circuit 23, second function
The output end of rate amplifying circuit 23 be isolated output unit 24 input terminal be connected, the input terminal of second feed circuit 25 with
The output end that output unit 24 is isolated is connected, and the output end of second feed circuit 25 is defeated with the second power amplification circuit 23
Enter end to be connected.
Further, the output end of the rectification output unit 16 of the DC voltage source 1 and the isolation in ripple voltage source 2 are defeated
The output end of unit 24 is connected with the input terminal of AC-DC coupling unit 3 simultaneously out, the output end of the AC-DC coupling unit 3
It is connected with the input terminal of voltage output unit 4, the output end of the voltage output unit 4 is connected with external terminal, is contained with output
There is the d. c. voltage signal of ripple component.
Further, the human-computer interface control unit 5 while the first communication unit 11 and ripple with DC voltage source 1
Second communication unit 21 of voltage source 2 is connected, the human-computer interface control unit 5 by with DC voltage source 1 and ripple voltage
Both-way communication between source 2 is to control the direct voltage output of voltage output unit 4.
Further, the DC voltage of the direct current energy meter and ripple voltage synthesizer further include display unit 7, key
Disk unit 8, the human-computer interface control unit 5 are connected with display unit 7 and keyboard unit 8 simultaneously, the human-computer interface control
Voltage output parameter is arranged by keyboard unit 8 in unit 5, and the human-computer interface control unit 5 shows voltage by display unit 7
Output parameter.
Wherein, above-mentioned voltage output parameter includes ripple frequency and amplitude.
Further, the DC voltage of the direct current energy meter and ripple voltage synthesizer further include third communication unit
6, the human-computer interface control unit 5 is connected by third communication unit 6 with PC machine end, and the human-computer interface control unit 5 is logical
It crosses third communication unit 6 and obtains the control command that PC machine end issues, the human-computer interface control unit 5 is according under above-mentioned PC machine end
The control command of hair adjusts voltage output parameter.
Wherein, above-mentioned voltage output parameter includes ripple frequency and amplitude.
In this preferred embodiment, the signal generating circuit 12 include CPU, D/A conversion chip, voltage reference chip and
Precision operational-amplifier.
Wherein, above-mentioned D/A conversion chip uses 16 high-speed transitions chips of ADI.The chip turns precision height, and stability is good.
Wherein, above-mentioned CPU uses 32 bit processors of ST company, and the high arithmetic speed of dominant frequency is fast.Wherein, above-mentioned voltage reference chip uses
ADI brand possesses extremely low noise and minimum temperature coefficient.Wherein, above-mentioned precision operational-amplifier is transported using zero temperature drift of ADI
Calculate amplifier.Amplifier signal output is stablized；The utilization of high-speed CPU and 16 D/A, be greatly improved digital waveform points and
Resolution ratio makes total touch analog signal output in conversion process more stable, high resolution, and the distortion factor is small.
In this preferred embodiment, first, second power amplification circuit 13/23 uses linear power amplifier principle,
Using integrated power amplifier, High Precision Low Temperature drift operational amplifier and closed loop AC feedback circuit, so that entire circuit has
Higher frequency response and load regulation, it is ensured that stable output signal.Perfect over-voltage and current foldback circuit can ensure that function
Rate component is not damaged in extreme circumstances, improves the reliability of whole equipment.
In this preferred embodiment, the AC-DC coupling unit 3 mainly utilizes transformer separated by direct communication principle, by direct current
Pressure signal and ripple signal are superimposed upon ripple signal on d. c. voltage signal by coupling circuit, and it is defeated to synthesize required band ripple
D. c. voltage signal out, it can be ensured that d. c. voltage signal and ripple voltage signal are independent of each other.When not doing ripple influence amount
When test, ripple voltage output signal can be turned off, only exports d. c. voltage signal, it is ensured that d. c. voltage signal output is stablized quasi-
Really, ripple content contained in direct current signal itself is minimum.
In this preferred embodiment, the first/second/third communication unit 11/21/6 includes communicating with host computer
RS232, RS485 and the RS232 communicated with man-machine interface industrial personal computer.Wherein, it is set between each communication unit and microprocessing unit
High speed photo coupling is equipped with to be isolated.
In this preferred embodiment, the human-computer interface control unit includes ARM industrial control board and liquid crystal display.
In this preferred embodiment, the AC-DC coupling unit includes high-precision isolating transformer, has separated by direct communication function
It can, it is ensured that DC voltage source and ripple voltage source are independent of each other, stable output signal.
DC voltage circuit disclosed in present patent application is superimposed the synthetic method of ripple, using DC voltage source and line
The mode of wave voltage source independent design, by coupling circuit anamorphic zone ripple export d. c. voltage signal, output signal it is big
It is small to be set and controlled by man-machine interface；DC voltage source uses linear amplifier, and d. c. voltage signal output is stablized, the linearity
Good, accuracy is high, and the rate-adaptive pacemaker range of ripple signal is wide, and amplitude can be arbitrarily arranged within the scope of 0-100V.
For a person skilled in the art, technical solution documented by foregoing embodiments can still be repaired
Change or equivalent replacement of some of the technical features, it is all within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included in protection scope of the present invention.
Claims (10)
1. a kind of DC voltage of direct current energy meter and ripple voltage synthesizer, which is characterized in that including DC voltage source, line
It wave voltage source, AC-DC coupling unit, voltage output unit, human-computer interface control unit and is provided to above-mentioned each electrical appliance
The Auxiliary Power Units of working power, in which:
The DC voltage source includes the first communication unit, signal generating circuit, the first power amplification circuit, the first feedback electricity
Road, isolation boosting unit and rectification output unit, in which:
One end of first communication unit is connected with signal generating circuit, the other end of first communication unit and man-machine boundary
The internal communication circuit of face control unit is connected, and first communication unit is used to receive the control life of man-machine interface control unit
It enables, so that signal generating circuit generates corresponding ac small signal；
The output end of the signal generating circuit is connected with the input terminal of the first power amplification circuit, the first power amplification electricity
The output end on road is connected with the input terminal of isolation boosting unit, input terminal and the isolation boosting unit of first feed circuit
Output end is connected, and the output end of first feed circuit is connected with the input terminal of the first power amplification circuit, and the isolation rises
The output end of unit and the input terminal of rectification output unit is pressed to be connected；
The ripple voltage source includes the second communication unit, wave generator circuit, the second power amplification circuit, the second feedback electricity
Road, isolation output unit, in which:
One end of second communication unit is connected with wave generator circuit, the other end of second communication unit and man-machine boundary
The internal communication circuit of face control unit is connected, and second communication unit is used to receive the control life of man-machine interface control unit
It enables, so that wave generator circuit generates the corresponding small signal of ripple；
The output end of the wave generator circuit is connected with the input terminal of the second power amplification circuit, the second power amplification electricity
The output end on road be isolated output unit input terminal be connected, the input terminal of second feed circuit with output unit is isolated
Output end is connected, and the output end of second feed circuit is connected with the input terminal of the second power amplification circuit.
2. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that institute
State DC voltage source rectification output unit output end and ripple voltage source isolation output unit output end simultaneously with friendship
The input terminal of dc-couple unit is connected, the output end and the input terminal phase of voltage output unit of the AC-DC coupling unit
Even, the output end of the voltage output unit is connected with external terminal, to export the d. c. voltage signal containing ripple component.
3. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that institute
State human-computer interface control unit simultaneously with the first communication unit of DC voltage source and the second communication unit phase in ripple voltage source
Even, it is defeated that the human-computer interface control unit controls voltage by the both-way communication between DC voltage source and ripple voltage source
The direct voltage output of unit out.
4. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that institute
It states the DC voltage of direct current energy meter and ripple voltage synthesizer further includes display unit, keyboard unit, the man-machine interface
Control unit is connected with display unit and keyboard unit simultaneously, and voltage is arranged by keyboard unit in the human-computer interface control unit
Output parameter, the human-computer interface control unit show voltage output parameter by display unit.
5. the DC voltage of direct current energy meter according to claim 4 and ripple voltage synthesizer, which is characterized in that on
Stating voltage output parameter includes ripple frequency and amplitude.
6. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that institute
It states the DC voltage of direct current energy meter and ripple voltage synthesizer further includes third communication unit, the human-computer interface control list
Member is connected by third communication unit with PC machine end, and the human-computer interface control unit obtains PC machine end by third communication unit
The control command issued, the human-computer interface control unit, which adjusts voltage output according to the control command that above-mentioned PC machine end issues, joins
Number.
7. the DC voltage of direct current energy meter according to claim 6 and ripple voltage synthesizer, which is characterized in that on
Stating voltage output parameter includes ripple frequency and amplitude.
8. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that institute
Stating signal generating circuit includes CPU, D/A conversion chip, voltage reference chip and precision operational-amplifier.
9. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that institute
Stating human-computer interface control unit includes ARM industrial control board and liquid crystal display.
10. the DC voltage of direct current energy meter according to claim 1 and ripple voltage synthesizer, which is characterized in that
The AC-DC coupling unit includes isolating transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810424616.XA CN108983141A (en) | 2018-05-07 | 2018-05-07 | The DC voltage and ripple voltage synthesizer of direct current energy meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810424616.XA CN108983141A (en) | 2018-05-07 | 2018-05-07 | The DC voltage and ripple voltage synthesizer of direct current energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098916A (en) * | 2020-07-24 | 2020-12-18 | 国网浙江省电力有限公司营销服务中心 | System and method for superposing ripples on direct current loop in direct current electric energy detection device |
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