CN206259912U - A kind of mutual conductance current power amplifier - Google Patents
A kind of mutual conductance current power amplifier Download PDFInfo
- Publication number
- CN206259912U CN206259912U CN201621347386.4U CN201621347386U CN206259912U CN 206259912 U CN206259912 U CN 206259912U CN 201621347386 U CN201621347386 U CN 201621347386U CN 206259912 U CN206259912 U CN 206259912U
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- winding
- current
- resistance
- amplifying unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
A kind of mutual conductance current power amplifier, including resistance R1, resistance R2, power amplifier A, range switch K1 and direct current wideband current transformer DCCT.The direct current wideband current transformer DCCT, including first winding W1, Secondary Winding W2, winding Wd, iron core T and multistage amplifying unit.Resistance R1 one end is connected with the positive terminal of power amplifier A, other end ground connection；Resistance R2 one end is connected with the end of oppisite phase of power amplifier A, other end ground connection；The output end of power amplifier A is connected with range switch K1 one end, the contact connection corresponding with first winding W1 of the range switch K1 other ends, first winding W1 other ends ground connection；Secondary Winding W2 one end is connected with the end of oppisite phase of power amplifier A, and the other end is connected with multistage amplifying unit；The ends of winding Wd bis- are connected with multistage amplifying unit.A kind of mutual conductance current power amplifier that the utility model is provided, can be to direct current, power frequency until the current signal of 2kHz audioranges carries out high accuracy conversion and amplifies.
Description
Technical field
The utility model is related to a kind of mutual conductance current power amplifier, category Electric Energy Metering Technology field.
Background technology
In recent years, China's intelligent grid has been enter into the all-round construction stage.With the fast development of intelligent grid, intelligent electric energy
Table is able to extensive use as the important component of intelligent grid, and its metering accuracy and operational reliability will be directly affected
Economic interests between electric company and electricity consumption user.
However, with such as：Electromagnetic oven, rectifier, inverter, crane.The appearance of the substantial amounts of nonlinear-load such as elevator,
Harmonic wave and Dynamic Signal in power network can all influence the metering accuracy of electric energy meter.Accordingly, it would be desirable to develop corresponding testing equipment
To examine the dynamic property of electric energy meter.
The need for dynamic signal output, the current power amplifier of device, it is desirable to which its frequency bandwidth should be from direct current, work
Frequency is until 2kHz audioranges all reach corresponding requirements.Obviously, setting using the current power amplifier in traditional electric probe device
Meter scheme can not meet requirement.
The content of the invention
The purpose of this utility model is, in order to overcome the deficiencies in the prior art, there is provided a kind of mutual conductance current power amplifies
Device, for electric energy meter dynamic property detection, accurately convert from direct current, power frequency up to 2kHz audioranges current signal simultaneously
It is amplified.
In order to solve the above-mentioned technical problem, the utility model is to be achieved through the following technical solutions：
A kind of mutual conductance current power amplifier, including：First resistor R1, second resistance R2, power amplifier A, range choosing
Select switch K1 and direct current wideband current transformer DCCT.
Described direct current wideband current transformer DCCT, including first winding W1, Secondary Winding W2, winding Wd, iron core T and
Multistage amplifying unit.
First resistor R1 one end is connected with the positive terminal of power amplifier A, other end ground connection；Second resistance R2 one end and work(
The end of oppisite phase connection of rate amplifier A, other end ground connection；The output end of power amplifier A is connected with range switch K1 one end,
The contact connection corresponding with first winding W1 of the range switch K1 other ends, first winding W1 other ends ground connection；Secondary Winding W2
One end is connected with the end of oppisite phase of power amplifier A, and the other end is connected with multistage amplifying unit；Amplify single with multistage in the ends of winding Wd bis-
Unit's connection.
Power amplifier A is a composite power amplifier for precision, and its output is added to directly through range switch K1
The a certain range of the first winding W1 of stream wideband current transformer DCCT.When range switch is connected to first winding W1 correspondences
When on contact, power amplifier A output currents I0；Output current I0By winding Wd, then by multistage amplifying unit, become
Change electric current I into；Electric current I is as feedback current by after Secondary Winding W2, a resistance being added to for 10 ohm as sampling current
Resistance R2 on, to produce negative feedback voltage；The magnification at high multiple function and direct current wideband current transformer of power amplifier A
The profound and negative feedbck of DCCT so that a kind of two electric currents of mutual conductance current power amplifier of the utility model have I0/ I=W2/W1 and
I0=UinThe relation of W2/W1R2, makes the U-I converters of function admirable, the small voltage signal U that D/A is exportedinIsolation is simultaneously
It is converted into current signal output I0。
Compared with prior art, the beneficial effects of the utility model are：The utility model provides a kind of mutual conductance electric current work(
Rate amplifier, accurately convert from direct current, power frequency up to 2kHz audioranges current signal and be amplified, for electric energy
Table dynamic property is detected.
Brief description of the drawings
Fig. 1 is apparatus structure schematic diagram of the present utility model.
Specific embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
It is apparatus structure schematic diagram of the present utility model shown in Fig. 1, a kind of mutual conductance current power amplifier, including：First
Resistance R1, second resistance R2, power amplifier A, range switch K1 and direct current wideband current transformer DCCT.
Described direct current wideband current transformer DCCT, including first winding W1, Secondary Winding W2, winding Wd, iron core T and
Multistage amplifying unit.
First resistor R1 one end is connected with the positive terminal of power amplifier A, other end ground connection；Second resistance R2 one end and work(
The end of oppisite phase connection of rate amplifier A, other end ground connection；The output end of power amplifier A is connected with range switch K1 one end,
The contact connection corresponding with first winding W1 of the range switch K1 other ends, first winding W1 other ends ground connection；Secondary Winding W2
One end is connected with the end of oppisite phase of power amplifier A, and the other end is connected with multistage amplifying unit；Amplify single with multistage in the ends of winding Wd bis-
Unit's connection.
Power amplifier A is a composite power amplifier for precision, and its output is added to directly through range switch K1
The a certain range of the first winding W1 of stream wideband current transformer DCCT.For example when range switch is connected to first winding W1
When on the contact of correspondence 1A, power amplifier A output currents I0；Output current I0By winding Wd, by multistage amplifier circuit
Unit, is transformed into electric current I, and it is by after Secondary Winding W2, a resistance being added to as sampling current as feedback current
On 10 ohm of second resistance R2, to produce negative feedback voltage；Magnification at high multiple function and direct current the wideband electricity of power amplifier A
The profound and negative feedbck of current transformer DCCT so that a kind of two electric currents of mutual conductance current power amplifier of the utility model have I0/I
=W2/W1 and I0=UinThe relation of W2/W1R2, makes the U-I converters of function admirable, the small voltage signal that D/A is exported
UinIsolate and be converted into current signal output I0。
Claims (1)
1. a kind of mutual conductance current power amplifier, it is characterised in that the amplifier includes first resistor, second resistance, power
Amplifier, range switch and direct current wideband current transformer；
The direct current wideband current transformer, including first winding, Secondary Winding, assists winding and multistage amplifying unit；
Described first resistor one end is connected with the positive terminal of power amplifier, other end ground connection；Put with power second resistance one end
The end of oppisite phase connection of big device, other end ground connection；The output end of power amplifier is connected with range switch one end, measurement range selection
The contact connection corresponding with first winding of the switch other end, first winding other end ground connection；Secondary Winding one end and power amplifier
End of oppisite phase connection, the other end with multistage amplifying unit be connected；The end of assists winding two is connected with multistage amplifying unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621347386.4U CN206259912U (en) | 2016-12-09 | 2016-12-09 | A kind of mutual conductance current power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621347386.4U CN206259912U (en) | 2016-12-09 | 2016-12-09 | A kind of mutual conductance current power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206259912U true CN206259912U (en) | 2017-06-16 |
Family
ID=59029643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621347386.4U Expired - Fee Related CN206259912U (en) | 2016-12-09 | 2016-12-09 | A kind of mutual conductance current power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206259912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533371A (en) * | 2016-12-09 | 2017-03-22 | 国网江西省电力公司电力科学研究院 | Transconductance current power amplifier |
-
2016
- 2016-12-09 CN CN201621347386.4U patent/CN206259912U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533371A (en) * | 2016-12-09 | 2017-03-22 | 国网江西省电力公司电力科学研究院 | Transconductance current power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105548656A (en) | Direct current high voltage isolation sampling circuit | |
| CN102879758A (en) | Standard source and detecting device both used for detecting harmonic influence quantity of electronic current transformer | |
| CN102445583B (en) | Voltage signal monitoring device of power energy quality monitoring device and circuit as well as application thereof | |
| CN105182126B (en) | Improved distribution transformer energy efficiency metering detection method | |
| CN104360304B (en) | Three-phase wideband current feedback circuit | |
| CN206258511U (en) | A kind of electric current, voltage ratio conversion and sampling apparatus | |
| CN206259912U (en) | A kind of mutual conductance current power amplifier | |
| CN104297565A (en) | Electric quantity digital converter based on FPGA and magnetic balance type Hall sensor | |
| CN204116451U (en) | A kind of Energy Efficiency of Distribution Transformer measuring and testing device | |
| CN201788222U (en) | AC-DC (alternating current-direct current) compatible isolated voltage sampling circuit | |
| CN204228946U (en) | A kind of electric energy meter error calibrating installation | |
| CN204168141U (en) | For peak current sampling and the signal processing circuit thereof of full-bridge switch converter | |
| CN106291226A (en) | Residual current transformer failure detector circuit and electrical fire-detector | |
| CN202486194U (en) | Current sensor based on Rogowski coil | |
| CN101614762A (en) | High precision electric current transducer | |
| CN202916330U (en) | Current sensor used for static synchronous compensator | |
| CN202189088U (en) | Alternating-current voltage isolating and measuring circuit based on combination of mutual inductor and operational amplifier | |
| CN204855583U (en) | Transient state of accurate heavy current rises and flows generating device | |
| CN201434883Y (en) | Rogowski coil electric quantity transducer | |
| CN106533371A (en) | Transconductance current power amplifier | |
| CN204631180U (en) | A kind of parallel thyristors leak current detection device and system | |
| CN204241556U (en) | A kind of 220VAC load current detection circuit | |
| CN203629536U (en) | Transformer winding analyzer | |
| CN104865427A (en) | Precise high-current transient current rise generating device | |
| CN103901385A (en) | Field calibration system for GIS current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170616 Termination date: 20181209 |