CN203933408U - Reaction type control circuit for EMC test power supply - Google Patents
Reaction type control circuit for EMC test power supply Download PDFInfo
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- CN203933408U CN203933408U CN201320778814.9U CN201320778814U CN203933408U CN 203933408 U CN203933408 U CN 203933408U CN 201320778814 U CN201320778814 U CN 201320778814U CN 203933408 U CN203933408 U CN 203933408U
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- 238000012360 testing method Methods 0.000 title claims abstract description 13
- 238000006757 chemical reactions by type Methods 0.000 title claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000013461 design Methods 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a kind of reaction type control circuit for EMC test power supply, comprise amplitude controller, comparator, power amplifier prime, power amplifier, agc circuit, sampling module, measurement module and vector sampling module, exchange the input that reference signal outputs to amplitude controller, amplitude controller output connects the input of power amplifier by a power amplifier prime, power amplifier output connects voltage follower circuit, on voltage follower circuit respectively and connect an agc circuit, sampling module and vector sampling module.The utility model adopts the voltage of the compound FEEDBACK CONTROL band sampling of original creation, current power amplifier design, can change automatic power adjustment amplifying circuit according to output amplitude and phase place, not only can amplitude of samples to output signal, sampling phase also, output signal compares with the reference signal that exchanges in machine after vector sampling, by difference, controls target In-put design.
Description
Technical field
The utility model belongs to electric power fortune inspection apparatus field, especially a kind of reaction type control circuit for EMC test power supply.
Background technology
The electric instruments all according to national standard all will have certain anti-electromagnetic property, must be through EMC test.There are the electromagnetic compatibility laboratory of oneself in relevant enterprise, testing agency, but while doing electromagnetic compatibility experiment for electric instrument, substantially be directly to use supply line or additional voltage regulator etc. as the power supply of instrument and meter, this supply power mode is once being that common supply line itself exists various interference signals; The 2nd, common supply line stability is inadequate, larger on its impact while applying interference signal; Can not accurately embody the noiseproof feature of tested device, make its evaluation produce deviation.So this power supply poor anti jamming capability of supply line or additional voltage regulator, can not accurate evaluation tested device.
Utility model content
The purpose of this utility model is to overcome above-mentioned weak point, and a kind of reaction type control circuit for EMC test power supply simple in structure, reasonable in design is provided.
The technical scheme that the utility model adopts is for achieving the above object:
A kind of reaction type control circuit for EMC test power supply, comprise control module, amplitude controller, comparator, power amplifier prime, power amplifier, agc circuit, sampling module, measurement module and vector sampling module, the interchange reference signal that control module is exported interchange reference signal source is controlled, this interchange reference signal outputs to the input of amplitude controller, amplitude controller output connects the input of power amplifier by a power amplifier prime, power amplifier output connects voltage follower circuit, on voltage follower circuit respectively and connect an agc circuit, sampling module and vector sampling module, described agc circuit connects comparator, this comparator is serially connected on the circuit between amplitude controller and power amplifier prime, described sampling module input is connected on voltage follower circuit, sampling module output connects the input of measurement module, the input of the output link control module of measurement module, the input of vector sampling module is connected on voltage follower circuit, the input of the output link control module of vector sampling module.
And, in described amplitude controller input prime, one low pass filter is installed.
And described amplitude controller is 16 high accuracy number potentiometers.
And, in described control module, be connected with display module.
The beneficial effects of the utility model are:
1, the utility model adopts the voltage of the compound FEEDBACK CONTROL band sampling of original creation, current power amplifier design, can change automatic power adjustment amplifying circuit according to output amplitude and phase place, not only can amplitude of samples to output signal, sampling phase also, output signal compares (amplitude, phase bit comparison) with the reference signal that exchanges in machine after vector sampling, controls the In-put design that carries out standard source by difference.
2, the utility model adds one-level low pass filter to AC signal source before power amplification, thus the medium-high frequency interference signal filtering higher than more than 3KHz, then filtered interchange reference signal is delivered to amplitude control circuit, amplitude control circuit mainly consists of 16 high accuracy number potentiometers, completes thus the adjusting fineness of output electric weight.
3, the utility model is separate for acquisition mode and the circuit of phase place, amplitude data and the data comparison of output signal, interference while not only avoiding signal extraction separately, and improved the precision of signal extraction, avoided the error that after concentrated extraction signal, distributor circuit carries out amplitude and phase data comparison and measurement respectively again.
Accompanying drawing explanation
Fig. 1 is that the circuit in the utility model connects block diagram.
Embodiment
Below in conjunction with accompanying drawing and by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection range of the present utility model with this.
A kind of reaction type control circuit for EMC test power supply, comprise control module, low pass filter, amplitude controller, comparator, power amplifier prime, power amplifier, agc circuit, sampling module, measurement module and vector sampling module, the interchange reference signal that control module is exported interchange reference signal source is controlled, this interchange reference signal outputs to the input of amplitude controller, regulation output electric weight fineness, in amplitude controller input prime, one low pass filter is installed, because exchanging reference signal, part there is the high frequency signal that a part is useless, so by low-pass filter circuit higher than medium-high frequency interference signal filtering more than 3KHz, amplitude controller output connects the input of power amplifier by a power amplifier prime, power amplifier output connects voltage follower circuit, power amplification circuit mainly completes and boosts or up-flow and power amplification.
On voltage follower circuit respectively and connect an agc circuit, sampling module and vector sampling module, described agc circuit connects comparator, this comparator is serially connected on the circuit between amplitude controller and power amplifier prime, agc circuit is mainly got the amplitude proportion signal of output variable, phase signal and part high frequency electrical signal composition, show that an error signal delivers to power amplifier front stage circuits and go conditioning signal to change.
Described sampling module input is connected on voltage follower circuit, sampling module output connects the input of measurement module, the input of the output link control module of measurement module, the input of vector sampling module is connected on voltage follower circuit, the input of the output link control module of vector sampling module.AC signal after power amplification circuit amplifies is connected to voltage follower circuit output, also the signal of telecommunication of Voltage-output is delivered to sampling module simultaneously and carried out the collection of electric weight amplitude, and measure by measurement module, then information is fed back to control module, vector sampling module gathers the phase place of the signal of telecommunication of Voltage-output, then information is also fed back to control module, when realizing compound FEEDBACK CONTROL thus, Voltage-output is sampled.
Amplitude controller is 16 high accuracy number potentiometers.
In control module, be connected with display module, display module can carry out observation and analysis to the electric weight amplitude of Voltage-output and electrical signal phase to sampling module and vector sampling module by connecting external equipment.
Although disclose for the purpose of illustration embodiment of the present utility model and accompanying drawing, but it will be appreciated by those skilled in the art that: within not departing from the spirit and scope of the utility model and claims, various replacements, variation and modification are all possible, therefore, scope of the present utility model is not limited to embodiment and the disclosed content of accompanying drawing.
Claims (4)
1. the reaction type control circuit for EMC test power supply, it is characterized in that: comprise control module, amplitude controller, comparator, power amplifier prime, power amplifier, agc circuit, sampling module, measurement module and vector sampling module, the interchange reference signal that control module is exported interchange reference signal source is controlled, this interchange reference signal outputs to the input of amplitude controller, amplitude controller output connects the input of power amplifier by a power amplifier prime, power amplifier output connects voltage follower circuit, on voltage follower circuit respectively and connect an agc circuit, sampling module and vector sampling module, described agc circuit connects comparator, this comparator is serially connected on the circuit between amplitude controller and power amplifier prime, described sampling module input is connected on voltage follower circuit, sampling module output connects the input of measurement module, the input of the output link control module of measurement module, the input of vector sampling module is connected on voltage follower circuit, the input of the output link control module of vector sampling module.
2. the reaction type control circuit for EMC test power supply according to claim 1, is characterized in that: in described amplitude controller input prime, one low pass filter is installed.
3. the reaction type control circuit for EMC test power supply according to claim 2, is characterized in that: described amplitude controller is 16 high accuracy number potentiometers.
4. the reaction type control circuit for EMC test power supply according to claim 1, is characterized in that: in described control module, be connected with display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778814.9U CN203933408U (en) | 2013-12-02 | 2013-12-02 | Reaction type control circuit for EMC test power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778814.9U CN203933408U (en) | 2013-12-02 | 2013-12-02 | Reaction type control circuit for EMC test power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203933408U true CN203933408U (en) | 2014-11-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320778814.9U Expired - Lifetime CN203933408U (en) | 2013-12-02 | 2013-12-02 | Reaction type control circuit for EMC test power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN203933408U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182108A (en) * | 2015-07-31 | 2015-12-23 | 江苏方天电力技术有限公司 | Evaluation device for environmental electromagnetic compatibility of power transmission and transformation primary equipment testing device |
-
2013
- 2013-12-02 CN CN201320778814.9U patent/CN203933408U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182108A (en) * | 2015-07-31 | 2015-12-23 | 江苏方天电力技术有限公司 | Evaluation device for environmental electromagnetic compatibility of power transmission and transformation primary equipment testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |