CN206004647U - A kind of SVG sampled signal modulate circuit - Google Patents
A kind of SVG sampled signal modulate circuit Download PDFInfo
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- CN206004647U CN206004647U CN201620989211.7U CN201620989211U CN206004647U CN 206004647 U CN206004647 U CN 206004647U CN 201620989211 U CN201620989211 U CN 201620989211U CN 206004647 U CN206004647 U CN 206004647U
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- resistance
- power amplifier
- sampled signal
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- voltage
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Abstract
This utility model embodiment discloses a kind of SVG sampled signal modulate circuit, solve existing signal condition modulate circuit only sampled voltage to be lifted, without considering jamproof process in the process to harmonic componentss contained in sampled signal and sampled signal output procedure, the inaccurate technical problem of sampled signal being input to process chip leading to.This utility model embodiment includes：Filter circuit and voltage follower circuit；Filter circuit includes resistance R1 and electric capacity C1, and voltage follower circuit is power amplifier U1；One end ground connection of electric capacity C1, the other end is connected to one end of resistance R1, and one end of resistance R1 is connected with the positive input terminal of power amplifier U1, the negative input end of power amplifier U1 is connected with the outfan of power amplifier U1, and the other end of resistance R1 is used for input sample signal.
Description
Technical field
This utility model is related to electron electric power technical field, more particularly, to a kind of SVG sampled signal modulate circuit.
Background technology
SVG is typical power electronic equipment, is made up of three basic function module：Detection module, control computing module
And compensation output module.Its operation principle is by the current information of outside CT detecting system, then analyzes via control chip
Current current information, such as PF, S, Q etc.；Then provided the drive signal of compensation by controller, finally by electronic power inversion electricity
The inversion circuit of road composition sends compensation electric current.State-of-the-art SVG product is the idle benefit of STATCOM--- Static Synchronous in the world
Repay device.
SVG static reacance generator employing can turn off power electronic devices (IGBT) composition from commutation bridge circuit, passes through
Reactor is connected in parallel on electrical network, suitably adjusts amplitude and the phase place of bridge circuit AC output voltage, or directly controls
Its ac-side current.Absorb rapidly or send required reactive power, realize the idle purpose of quick dynamic regulation.As having
Source shape compensation device, not only can follow the tracks of the dash current of impingement load, and harmonic current can be also carried out follow the tracks of benefit
Repay.
In SVG running, need the three-phase output of the three-phase voltage to electrical network, the three-phase current of load and SVG
Electric current is sampled.Because the process chip of controller carries A/D ALT-CH alternate channel, conversion is very convenient, but AD conversion port
Require the voltage that input is less than 3.3V, and be unipolarity；And the sampled signal of Hall element output is usually bipolarity, because
This needs is nursed one's health to this signal.Current signal conditioning circuit carries out voltage only with a power amplifier to sampled signal mostly
Lifting is it is ensured that it is in the range of 0-3.3V.
Existing signal condition modulate circuit is only lifted to sampled voltage, without considering to contained in sampled signal
Jamproof process in the process of harmonic componentss and sampled signal output procedure, result in the sampling letter being input to process chip
Number inaccurate technical problem.
Utility model content
This utility model embodiment discloses a kind of SVG sampled signal modulate circuit, solves existing signal condition and adjusts
Reason circuit is only lifted to sampled voltage, without considering the process to harmonic componentss contained in sampled signal and sampling letter
Jamproof process in number output procedure, the inaccurate technical problem of sampled signal being input to process chip leading to.
This utility model embodiment provides a kind of SVG sampled signal modulate circuit, including：
Filter circuit and voltage follower circuit；
Described filter circuit includes resistance R1 and electric capacity C1, and voltage follower circuit is power amplifier U1；
One end ground connection of described electric capacity C1, the other end is connected to one end of described resistance R1, and one end of described resistance R1
It is connected with the positive input terminal of described power amplifier U1, the negative input end of described power amplifier U1 and described power amplifier U1
Outfan connect, the other end of described resistance R1 is used for input sample signal.
Alternatively, also include：
Voltage lifting circuit, is electrically connected with described voltage follower circuit, and described voltage lifting circuit is used for being lifted described
The voltage of sampled signal.
Alternatively, also include：
Voltage clamp circuit, is electrically connected with described voltage lifting circuit, and described voltage clamp circuit is used for avoiding high electricity
Pressure is damaged to process chip.
Alternatively, described voltage lifting circuit includes resistance R2, resistance R3, resistance R4, resistance R5, power amplifier U2.
Alternatively, described resistance R3, described resistance R4 are connected in parallel, one end of described resistance R3 and described power amplifier
The outfan of U1 connects, and the other end of described resistance R3 is connected with the negative input end of described power amplifier U2；
One end of described resistance R4 is connected with power supply VCC, and the other end of described resistance R4 is with described power amplifier U2's
Negative input end connects；
One end ground connection of described resistance R5, the other end of described resistance R5 is connected with the positive input terminal of described power amplifier U2
Connect；
The negative input end of described power amplifier U2 is connected with one end of described resistance R2, the other end institute of described resistance R2
The outfan stating power amplifier U2 connects.
Alternatively, described voltage clamp circuit includes diode D1 and diode D2.
Alternatively, described diode D1 and described diode D2 is connected in series, described diode D1 and described diode D2
Junction is connected with the outfan of described power amplifier U2.
Alternatively, the negative electrode of described diode D1 is connected with 3.3V power supply, described diode D1 anode and described diode
The negative electrode of D2 connects, and the anode of described diode D2 is connected with ground wire.
Alternatively, described diode D1 and described diode D2 is Zener diode.
Alternatively, described resistance R2 is slide rheostat.
As can be seen from the above technical solutions, this utility model embodiment has advantages below：
This utility model embodiment provides this utility model embodiment and provides a kind of SVG sampled signal modulate circuit,
Including：Filter circuit and voltage follower circuit；Filter circuit includes resistance R1 and electric capacity C1, and voltage follower circuit is power amplification
Device U1；One end ground connection of electric capacity C1, the other end is connected to one end of resistance R1, and one end of resistance R1 is with power amplifier U1's
Positive input terminal connects, and the negative input end of power amplifier U1 is connected with the outfan of power amplifier U1, the other end of resistance R1
For input sample signal.In the present embodiment, harmonic wave and the impurity composition in sampled signal can be filtered by filter circuit, make to adopt
Sample signal is more accurate, and voltage follower circuit is acted on due to profound and negative feedbck, it is possible to achieve voltage isolation, working stability, input
Resistance is big and output resistance is little, and voltage is not subject to rear class impedance influences, makes sampled signal more stable, and without interruption, solves
Existing signal condition modulate circuit is only lifted to sampled voltage, without considering to harmonic componentss contained in sampled signal
Process and sampled signal output procedure in jamproof process, lead to be input to process chip sampled signal inaccurate
Technical problem.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before not paying creative labor
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structural representation of SVG sampled signal modulate circuit for providing in this utility model embodiment for the Fig. 1.
Specific embodiment
This utility model embodiment discloses a kind of SVG sampled signal modulate circuit, solves existing signal condition and adjusts
Reason circuit is only lifted to sampled voltage, without considering the process to harmonic componentss contained in sampled signal and sampling letter
Jamproof process in number output procedure, the inaccurate technical problem of sampled signal being input to process chip leading to.
Refer to Fig. 1, an a kind of embodiment of the SVG sampled signal modulate circuit providing in this utility model embodiment
Including：
Filter circuit and voltage follower circuit；
Filter circuit includes resistance R1 and electric capacity C1, and voltage follower circuit is power amplifier U1；
One end ground connection of electric capacity C1, the other end is connected to one end of resistance R1, and one end of resistance R1 and power amplifier
The positive input terminal of U1 connects, and the negative input end of power amplifier U1 is connected with the outfan of power amplifier U1, and resistance R1's is another
One end is used for input sample signal.
Alternatively, also include：
Voltage lifting circuit, is electrically connected with voltage follower circuit, and voltage lifting circuit is used for lifting the electricity of sampled signal
Pressure.
Alternatively, also include：
Voltage clamp circuit, is electrically connected with voltage lifting circuit, and voltage clamp circuit is used for avoiding high voltage to process
Wafer damage.
Alternatively, voltage lifting circuit includes resistance R2, resistance R3, resistance R4, resistance R5, power amplifier U2.
Alternatively, resistance R3, resistance R4 are connected in parallel, and one end of resistance R3 is connected with the outfan of power amplifier U1,
The other end of resistance R3 is connected with the negative input end of power amplifier U2；
One end of resistance R4 is connected with power supply VCC, and the other end of resistance R4 is connected with the negative input end of power amplifier U2；
One end ground connection of resistance R5, the other end of resistance R5 is connected with the positive input terminal of power amplifier U2；
The negative input end of power amplifier U2 is connected with one end of resistance R2, the other end power amplifier U2's of resistance R2
Outfan connects.
Alternatively, voltage clamp circuit includes diode D1 and diode D2.
Alternatively, diode D1 and diode D2 is connected in series, diode D1 and diode D2 junction and power amplification
The outfan of device U2 connects.
Alternatively, the negative electrode of diode D1 is connected with 3.3V power supply, and diode D1 anode is connected with the negative electrode of diode D2,
The anode of diode D2 is connected with ground wire.
Alternatively, diode D1 and diode D2 is Zener diode.
Alternatively, resistance R2 is slide rheostat.
As shown in figure 1, filtered electrical routing resistance R1 and electric capacity C1 series connection after connect and compose with ground wire, input signal with electricity
The first end of resistance R1 connects, and second end of R1 is connected with the first end of electric capacity C1, and second end of electric capacity C1 is connected with ground wire；Voltage
Follow circuit is made up of a power amplifier U1, the first end of the resistance R3 of the outfan of U1 and its negative input end and voltage lifting circuit
Connect, positive input terminal is connected with second end of the resistance R1 of filter circuit；Voltage lifting circuit has resistance R2, R3, R4, R5, work(
Put U2 and power supply VCC composition, second end of resistance R3 is connected with the negative input end of U2, the first end of resistance R4 is with power supply VCC even
Connect, the second end is connected with second end of resistance R3 and the negative input end of power amplifier U2, the first end of resistance R2 is negative defeated with power amplifier U2's
Enter end to connect, the second end is connected with the outfan of U2, and the first end of resistance R5 is connected with the positive input terminal of U2, the second end and ground wire
Connect；Voltage clamping circuit is made up of two Zener diode D1, D2 and 3.3V power supplys, and the negative electrode of D1 is connected with 3.3V power supply,
D1 anode is connected with the negative electrode of D2, and the anode of D2 is connected with ground wire.
Filter circuit can filter harmonic wave and impurity composition in sampled signal, makes sampled signal more accurate.Voltage follow
Circuit is acted on due to profound and negative feedbck, it is possible to achieve voltage isolation, working stability, input resistance is big and output resistance is little, voltage
It is not subject to rear class impedance influences, make sampled signal more stable, and without interruption.Voltage lifting circuit is transported through the addition of power amplifier
Calculate, the voltage of lifting sampled signal.Clamp circuit is it is ensured that output voltage is in the range of 0-3.3V, it is to avoid produce high voltage to control
The A/D port of device process chip processed produces impact, so that process chip is damaged.
Resistance R2 is replaced by slide rheostat, according to practical situation, amplification is adjusted, suitable to obtain
Sampled voltage signal.
This utility model embodiment provides this utility model embodiment and provides a kind of SVG sampled signal modulate circuit,
Including：Filter circuit and voltage follower circuit；Filter circuit includes resistance R1 and electric capacity C1, and voltage follower circuit is power amplification
Device U1；One end ground connection of electric capacity C1, the other end is connected to one end of resistance R1, and one end of resistance R1 is with power amplifier U1's
Positive input terminal connects, and the negative input end of power amplifier U1 is connected with the outfan of power amplifier U1, the other end of resistance R1
For input sample signal.In the present embodiment, harmonic wave and the impurity composition in sampled signal can be filtered by filter circuit, make to adopt
Sample signal is more accurate, and voltage follower circuit is acted on due to profound and negative feedbck, it is possible to achieve voltage isolation, working stability, input
Resistance is big and output resistance is little, and voltage is not subject to rear class impedance influences, makes sampled signal more stable, and without interruption, solves
Existing signal condition modulate circuit is only lifted to sampled voltage, without considering to harmonic componentss contained in sampled signal
Process and sampled signal output procedure in jamproof process, lead to be input to process chip sampled signal inaccurate
Technical problem.
Above a kind of SVG sampled signal modulate circuit provided by the utility model is described in detail, for this
The those skilled in the art in field, according to the thought of this utility model embodiment, all can in specific embodiments and applications
In place of having change, in sum, this specification content should not be construed as to restriction of the present utility model.
Claims (10)
1. a kind of SVG sampled signal modulate circuit is it is characterised in that include：
Filter circuit and voltage follower circuit；
Described filter circuit includes resistance R1 and electric capacity C1, and voltage follower circuit is power amplifier U1；
One end ground connection of described electric capacity C1, the other end is connected to one end of described resistance R1, and one end of described resistance R1 and institute
The positive input terminal stating power amplifier U1 connects, and the negative input end of described power amplifier U1 is defeated with described power amplifier U1's
Go out end to connect, the other end of described resistance R1 is used for input sample signal.
2. SVG sampled signal modulate circuit according to claim 1 is it is characterised in that also include：
Voltage lifting circuit, is electrically connected with described voltage follower circuit, and described voltage lifting circuit is used for lifting described sampling
The voltage of signal.
3. SVG sampled signal modulate circuit according to claim 2 is it is characterised in that also include：
Voltage clamp circuit, is electrically connected with described voltage lifting circuit, and described voltage clamp circuit is used for avoiding high voltage pair
Process chip is damaged.
4. SVG sampled signal modulate circuit according to claim 3 is it is characterised in that described voltage lifting circuit includes
Resistance R2, resistance R3, resistance R4, resistance R5, power amplifier U2.
5. SVG sampled signal modulate circuit according to claim 4 is it is characterised in that described resistance R3, described resistance R4
Be connected in parallel, one end of described resistance R3 is connected with the outfan of described power amplifier U1, the other end of described resistance R3 with
The negative input end of described power amplifier U2 connects；
One end of described resistance R4 is connected with power supply VCC, and the other end of described resistance R4 is negative defeated with described power amplifier U2's
Enter end to connect；
One end ground connection of described resistance R5, the other end of described resistance R5 is connected with the positive input terminal of described power amplifier U2；
The negative input end of described power amplifier U2 is connected with one end of described resistance R2, the work(described in the other end of described resistance R2
The outfan of rate amplifier U2 connects.
6. SVG sampled signal modulate circuit according to claim 5 is it is characterised in that described voltage clamp circuit includes
Diode D1 and diode D2.
7. SVG sampled signal modulate circuit according to claim 6 is it is characterised in that described diode D1 and described two
Pole pipe D2 is connected in series, and described diode D1 and described diode D2 junction are connected with the outfan of described power amplifier U2
Connect.
8. SVG sampled signal modulate circuit according to claim 7 it is characterised in that the negative electrode of described diode D1 with
3.3V power supply connects, and described diode D1 anode is connected with the negative electrode of described diode D2, the anode of described diode D2 and
Line connects.
9. the SVG sampled signal modulate circuit according to claim 7 or 8 is it is characterised in that described diode D1 and described
Diode D2 is Zener diode.
10. the SVG sampled signal modulate circuit according to claim 4 or 5 is it is characterised in that described resistance R2 is to slide
Rheostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620989211.7U CN206004647U (en) | 2016-08-30 | 2016-08-30 | A kind of SVG sampled signal modulate circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620989211.7U CN206004647U (en) | 2016-08-30 | 2016-08-30 | A kind of SVG sampled signal modulate circuit |
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| Publication Number | Publication Date |
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| CN206004647U true CN206004647U (en) | 2017-03-08 |
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ID=58195854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201620989211.7U Active CN206004647U (en) | 2016-08-30 | 2016-08-30 | A kind of SVG sampled signal modulate circuit |
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| CN (1) | CN206004647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061269A (en) * | 2018-07-30 | 2018-12-21 | 航天银山电气有限公司 | A kind of signal sample circuit and signal sampling device |
| CN109884384A (en) * | 2019-04-03 | 2019-06-14 | 深圳市佳运通电子有限公司 | A kind of signal acquisition circuit of compatible electric current and voltage input |
-
2016
- 2016-08-30 CN CN201620989211.7U patent/CN206004647U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061269A (en) * | 2018-07-30 | 2018-12-21 | 航天银山电气有限公司 | A kind of signal sample circuit and signal sampling device |
| CN109884384A (en) * | 2019-04-03 | 2019-06-14 | 深圳市佳运通电子有限公司 | A kind of signal acquisition circuit of compatible electric current and voltage input |
| CN109884384B (en) * | 2019-04-03 | 2024-02-06 | 深圳市佳运通电子有限公司 | Signal acquisition circuit compatible with current and voltage input |
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| GR01 | Patent grant |