CN205212790U - Take care of amplifier circuit - Google Patents
Take care of amplifier circuit Download PDFInfo
- Publication number
- CN205212790U CN205212790U CN201521101465.2U CN201521101465U CN205212790U CN 205212790 U CN205212790 U CN 205212790U CN 201521101465 U CN201521101465 U CN 201521101465U CN 205212790 U CN205212790 U CN 205212790U
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- China
- Prior art keywords
- resistance
- amplifier
- connects
- electric capacity
- output
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a take care of amplifier circuit, wherein, include: current input connects the one end of first resistance and second resistance respectively, the other end ground connection of first resistance, the other end ground connection of third resistance, the first end of the 5th resistance is connected to first amplifier output end, and the one end of the 6th resistance is connected to the other end of the 5th resistance, and the anode of second amplifier is connected to the other end of the 6th resistance, and the output of second amplifier is connected to the negative terminal of second amplifier, and the 7th resistance and second electric capacity are still connected to the output of second amplifier, and the other end of second electric capacity is connected between the 5th resistance and the 6th resistance, the one end ground connection of first electric capacity, the positive input terminal of second amplifier is connected to the other end, the other end ground connection of third electric capacity and output, third electric capacity is connected to the other end of the 7th resistance.
Description
Technical field
The utility model includes active power filter technical field, particularly one conditioning amplifying circuit
Background technology
Along with the complexity of current electric grid load is various, the problem caused by harmonic wave and the quality of power supply such as idle is serious all the more.Electrical network and power consumption equipment have relevant criterion to limit harmonic content,
Figure 1 shows that the fundamental diagram of Active Power Filter-APF, with reference to figure 1, Active Power Filter-APF (being called for short APF) is the power electronic equipment of a kind of dynamic harmonic inhabitation and compensating reactive power, be equivalent to a controllable current source, be parallel to electrical network, by detecting the harmonic components of load current, produce the pulse current injectingt electrical network contrary with load harmonic current equal and opposite in direction direction, thus realize the compensation to system harmonics.The load current iL of Active Power Filter-APF is decomposed into first-harmonic component i f and harmonic components ih, active electric power filter to output current is i, the current waveform i that the current waveform iL of load-side and Active Power Filter-APF self send is gathered by analog signal sample circuit 10, reference current i* is calculated by instruction current computing circuit 11, current follow-up control circuit 12 calculates by closed loop control algorithm the current i accurate real-time tracking reference current i* that main circuit control signal realizes Active Power Filter-APF, drive circuit 13 amplifies control signal the IGBT power model being transferred to main circuit 14, complete the output of current i.Make reference current i*=ih, namely Active Power Filter-APF exports identical harmonic cancellation load harmonic, then the fundamental current if of system side current i s only containing load-side, thus realizes the harmonic filtration effect to system.
Active Power Filter-APF needs to carry out conditioning to feedback signal and amplifies, therefore, need a kind of can the conditioning amplifying circuit of reliable filtering.
Utility model content
The purpose of this utility model is to provide a kind of conditioning amplifying circuit, for solving the problem of above-mentioned prior art.
One conditioning amplifying circuit of the present utility model, wherein, comprising: the first amplifier, the second amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity; Second resistance connects the positive input terminal of the first amplifier, and the 3rd resistance connects the negative input end of the first amplifier, between the output that the 4th resistance is connected across the first amplifier and negative input end; Current input terminal connects one end of the first resistance and the second resistance respectively; The other end ground connection of the first resistance; The other end ground connection of the 3rd resistance; First amplifier out connects the first end of the 5th resistance, the other end of the 5th resistance connects one end of the 6th resistance, the other end of the 6th resistance connects the anode of the second amplifier, the negative terminal of the second amplifier connects the output of the second amplifier, the output of the second amplifier also connects the 7th resistance and the second electric capacity, and the other end of the second electric capacity is connected between the 5th resistance and the 6th resistance; One end ground connection of the first electric capacity, the other end connects the positive input terminal of the second amplifier; The other end of the 7th resistance connects the 3rd electric capacity and output, the other end ground connection of the 3rd electric capacity.
Originally be the conditioning amplifying circuit of utility model, wherein, also comprise: the first diode and the second diode, the negative electrode of the first diode is just connecting power supply, and anode connects output, and the negative electrode of the second diode connects output, and anode connects power-.
Visible, conditioning amplifying circuit of the present utility model, effectively can carry out filtering to feedback current.
Accompanying drawing explanation
Figure 1 shows that the fundamental diagram of Active Power Filter-APF;
Figure 2 shows that the circuit diagram of the utility model conditioning amplifying circuit.
Embodiment
For making the purpose of this utility model, content and advantage clearly, below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.
Figure 2 shows that the circuit diagram of the utility model conditioning amplifying circuit, as shown in Figure 2, a kind of conditioning amplifying circuit, comprising: the first amplifier U16A, the second amplifier U16D, resistance R1 ~ R7, electric capacity C1 ~ C3, diode D1 and diode D2.
With reference to figure 2, the second resistance R2 connects the positive input terminal of the first amplifier U16A, and the 3rd resistance R3 connects the negative input end of the first amplifier U16A, between the output that the 4th resistance R4 is connected across the first amplifier U16A and negative input end.Current input terminal IAin connects one end of the first resistance R1 and the second resistance R2 respectively.The other end ground connection of the first resistance R1.The other end ground connection of the 3rd resistance R3.First amplifier U16A output connects the first end of the 5th resistance R5, the other end of the 5th resistance R5 connects one end of the 6th resistance R6, the other end of the 6th resistance R6 connects the anode of the second amplifier U16D, the negative terminal of the second amplifier U16D connects the output of the second amplifier U16D, the output of the second amplifier U16D also connects the 7th resistance R7 and the second electric capacity C2, and the other end of the second electric capacity C2 is connected between the 5th resistance R5 and the 6th resistance R6; One end ground connection of the first electric capacity C1, the other end connects the positive input terminal of the second amplifier U16D; The other end of the 7th resistance R7 connects the 3rd electric capacity C3 and output IAout, the other end ground connection of the 3rd electric capacity C3; The negative electrode of the first diode D1 is just connecting power supply, and anode connects output IAout, and the negative electrode of the second diode D2 connects output IAout, and anode connects power-.
With reference to figure 2, IAin is current transformer output current, voltage signal is converted to through sampling resistor, first order operational amplification circuit is isolation amplification, take out analog signal and isolated impedance, first order amplifying circuit exports as IA1, and second level amplifying circuit is second order filter, with the high-frequency harmonic composition controlling to have nothing to do in filtering analog signal, the analog signal IAout after conditioning exports to AD conversion chip.
Visible, conditioning amplifying circuit of the present utility model, effectively can carry out filtering to feedback current.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection range of the present utility model.
Claims (2)
1. a conditioning amplifying circuit, it is characterized in that, comprising: the first amplifier, the second amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity;
Second resistance connects the positive input terminal of the first amplifier, and the 3rd resistance connects the negative input end of the first amplifier, between the output that the 4th resistance is connected across the first amplifier and negative input end;
Current input terminal connects one end of the first resistance and the second resistance respectively; The other end ground connection of the first resistance; The other end ground connection of the 3rd resistance; First amplifier out connects the first end of the 5th resistance, the other end of the 5th resistance connects one end of the 6th resistance, the other end of the 6th resistance connects the anode of the second amplifier, the negative terminal of the second amplifier connects the output of the second amplifier, the output of the second amplifier also connects the 7th resistance and the second electric capacity, and the other end of the second electric capacity is connected between the 5th resistance and the 6th resistance; One end ground connection of the first electric capacity, the other end connects the positive input terminal of the second amplifier; The other end of the 7th resistance connects the 3rd electric capacity and output, the other end ground connection of the 3rd electric capacity.
2. nurse one's health amplifying circuit as claimed in claim 1, it is characterized in that, also comprise: the first diode and the second diode, the negative electrode of the first diode is just connecting power supply, anode connects output, and the negative electrode of the second diode connects output, and anode connects power-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521101465.2U CN205212790U (en) | 2015-12-25 | 2015-12-25 | Take care of amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521101465.2U CN205212790U (en) | 2015-12-25 | 2015-12-25 | Take care of amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205212790U true CN205212790U (en) | 2016-05-04 |
Family
ID=55850478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521101465.2U Expired - Fee Related CN205212790U (en) | 2015-12-25 | 2015-12-25 | Take care of amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205212790U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291250A (en) * | 2016-08-30 | 2017-01-04 | 合肥智博电气有限公司 | High-voltage cable insulating runs detecting system |
| CN106507247A (en) * | 2016-12-31 | 2017-03-15 | 马鞍山格尚智能装备有限公司 | A kind of large-scale stereo set volume playing circuit |
| CN107743020A (en) * | 2017-11-30 | 2018-02-27 | 贝兹维仪器(苏州)有限公司 | A kind of signal amplification circuit |
-
2015
- 2015-12-25 CN CN201521101465.2U patent/CN205212790U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291250A (en) * | 2016-08-30 | 2017-01-04 | 合肥智博电气有限公司 | High-voltage cable insulating runs detecting system |
| CN106507247A (en) * | 2016-12-31 | 2017-03-15 | 马鞍山格尚智能装备有限公司 | A kind of large-scale stereo set volume playing circuit |
| CN107743020A (en) * | 2017-11-30 | 2018-02-27 | 贝兹维仪器(苏州)有限公司 | A kind of signal amplification circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20161225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |