CN207588469U - A kind of energy feedback sinusoidal voltage synchronous base circuit - Google Patents
A kind of energy feedback sinusoidal voltage synchronous base circuit Download PDFInfo
- Publication number
- CN207588469U CN207588469U CN201721363693.6U CN201721363693U CN207588469U CN 207588469 U CN207588469 U CN 207588469U CN 201721363693 U CN201721363693 U CN 201721363693U CN 207588469 U CN207588469 U CN 207588469U
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- China
- Prior art keywords
- circuit
- energy feedback
- synchronous base
- sinusoidal voltage
- voltage synchronous
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Abstract
The utility model discloses a kind of energy feedback sinusoidal voltage synchronous base circuits.It includes the common Industrial Frequency Transformer T1, polarity free capacitor C1, C2 for voltage sample, the filter circuit of resistance R1, R2, R3, R4 composition, the amplifying circuit that R5, R6 and operational amplifier U1 are formed.The utility model is simple in structure, reasonable design, very easily forms three-phase reference sinusoidal signal, per road, input and power grid are all mutually isolated, insulate high pressure between the input of each road power supply, strong antijamming capability, is very suitable for the sinusoidal voltage synchronous base circuit as energy feedback system.
Description
Technical field
The utility model is related to a kind of energy feedback sinusoidal voltage synchronous base circuits, belong to the one of energy feedback system
A component is mainly used in grid-connected feedback inversion transformation device.
Background technology
The output current of energy feedback system was both synchronous with input network voltage, tracked reference sinusoidal voltage again, therefore
Reference signal must be synchronous with input network voltage.As the feedback converter current Setting signal of electric current Instantaneous Control, wave
The quality of shape directly influences amplitude, frequency and the THD of output positive wave, therefore it is required that reference sinusoidal wave generation circuit can carry
Highly stable for amplitude, frequency, the distortion factor is small and the adjustable sine wave of amplitude.
Traditional energy feedback reference signal is directly to acquire network voltage as feedback current with reference to letter using electric resistance partial pressure
Number, this method has several drawbacks in that：
1) since network voltage has distortion in itself, the distortion of reference signal can cause output to generate distortion, so as to cause
Pollution to power grid.
2) reference signal is directly sampled by electric resistance partial pressure, is not isolated with forceful electric power, there are security risks.
Utility model content
The utility model is to solve above-mentioned technical problem and the technical solution adopted is that provide a kind of energy feedback sine
Voltage synchronous reference circuit, wherein, specific technical solution is：
Common Industrial Frequency Transformer T1, polarity free capacitor C1, C2 including being used for voltage sample, including resistance R1, R2, R3,
The filter circuit of R4 compositions, the amplifying circuit formed including R5, R6 and operational amplifier U1.Resistance R1, R2, R3, R4, R5, R6
Changeable parameters, U1 is general-purpose operation amplifier, the phase that the input winding terminal (high-pressure side) of T1 gets access to grid, and output winding is (low
Press side) one end of termination a R1, the other end and R2 connect, one end connection of the other end and R3 of R1 and R2, the other end of R3
It is connect with one end of R4, the other end of R4 is connect with low-pressure side winding one end of C1, R2, R5, T1, and C1 is in parallel with R2, C2 and R3
It is in parallel.
2 feet of U1 are connected with one end of C2, R3, R4, R5, and one end of 3 feet of U1 and R6 connect, and 1 foot of U1 and R5's is another
One end is connected, and R5, R6 and operational amplifier U1 form reverse phase scaling circuit.
The utility model has the advantages that relative to the prior art：
The utility model is simple in structure, reasonable design, very easily forms three-phase reference sinusoidal signal, is inputted per road
It is all mutually isolated with power grid, insulate high pressure between the input of each road power supply, and strong antijamming capability is very suitable for as energy
Measure the sinusoidal voltage synchronous base circuit of feedback system.
Description of the drawings
Fig. 1 is the reference sinusoidal circuit synchronous with network voltage.
Fig. 2 is three-phase reference sinusoidal signal.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, the technical solution in embodiment is carried out clear, complete
Ground describes.Fig. 1 is a kind of circuit diagram of energy feedback sinusoidal voltage synchronous base circuit embodiments of the utility model.
The utility model, using mains voltage signal as sinusoidal reference amount, using common Industrial Frequency Transformer T1 (220V/
5V) directly up-sampled from power grid.Fig. 1 is A phase voltage sampling principle figures, and the voltage sample schematic diagram of B, C phase is identical.In figure, R1,
R2, R3, R4 capacitance C1, C2 filter out disturbing high frequency components.
In order to obtain adjustable sine wave signal in order to adjust its parameter, it is big to adjust it using reverse phase proportional controller
Small, the amplitude of output reference signal can change the parameter of R5 according to specific needs to meet the requirements.It is synchronous with network voltage
Reference sinusoidal circuit has the advantages that, reliable operation synchronous with network voltage, at low cost, realization is simple, output waveform THD is low.
Fig. 2 is three-phase reference sinusoidal signal measured waveform, is the mistake of three-phase reference sinusoidal signal A phase voltages measured using FLUKE43B
True degree, the distortion factor of A phase voltages is 1.5%, can meet application request.By following description and with reference to attached drawing, sheet
Utility model will become more fully apparent, these attached drawings are used to explain the embodiment of the utility model.
With reference to Fig. 1, the circuit of the present embodiment includes the common Industrial Frequency Transformer T1 for voltage sample, polarity free capacitor
C1, C2, the filter circuit of resistance R1, R2, R3, R4 composition, the amplifying circuit that R5, R6 and operational amplifier U1 are formed.Including work
Frequency power transformer T1, polarity free capacitor C1, C2, the changeable parameters of resistance R1, R2, R3, R4, R5, R6, U1 amplify for general-purpose operation
Device.Its physical circuit is as follows:The phase that the input winding terminal (high-pressure side) of T1 gets access to grid, one end of output winding (low-pressure side)
R1 is met, one end connection of the other end and R2, one end connection of the other end and R3 of R1 and R2, the other end of R3 and one end of R4 connect
It connecing, the other end of R4 is connect with low-pressure side winding one end of C1, R2, R5, T1, and C1 is in parallel with R2, and C2 is in parallel with R3, capacitance C1,
The filter circuit of C2, resistance R1, R2, R3, R4 composition.2 feet for further including U1 are connected with one end of C2, R3, R4, R5, and the 3 of U1
One end of foot and R6 connect, and 1 foot of U1 is connected with the other end of R5, and R5, R6 and operational amplifier U1 form reverse phase ratio enlargement
Circuit.
The utility model is simple in structure, reasonable design, very easily forms three-phase reference sinusoidal signal, is inputted per road
It is all mutually isolated with power grid, insulate high pressure between the input of each road power supply, and strong antijamming capability is very suitable for as energy
Measure the sinusoidal voltage synchronous base circuit of feedback system.
Claims (2)
1. a kind of energy feedback sinusoidal voltage synchronous base circuit, it is characterised in that：Unskilled labor including being used for voltage sample
Frequency power transformer T1, polarity free capacitor C1, C2 include the filter circuit of resistance R1, R2, R3, R4 composition, including R5, R6 and operation
The amplifying circuit that amplifier U1 is formed；
The changeable parameters of resistance R1, R2, R3, R4, R5, R6, U1 are general-purpose operation amplifier, what the input winding terminal of T1 got access to grid
One phase exports a termination R1 of winding, one end connection of the other end and R2, one end connection of the other end and R3 of R1 and R2, R3
The other end and one end of R4 connect, the other end of R4 connect with low-pressure side winding one end of C1, R2, R5, T1, and C1 and R2 are simultaneously
Connection, C2 are in parallel with R3.
2. energy feedback according to claim 1 sinusoidal voltage synchronous base circuit, it is characterised in that：2 feet of U1 with
One end of C2, R3, R4, R5 are connected, and 3 feet of U1 and one end of R6 connect, and 1 foot of U1 is connected with the other end of R5, R5, R6 and fortune
It calculates amplifier U1 and forms reverse phase scaling circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721363693.6U CN207588469U (en) | 2017-10-23 | 2017-10-23 | A kind of energy feedback sinusoidal voltage synchronous base circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721363693.6U CN207588469U (en) | 2017-10-23 | 2017-10-23 | A kind of energy feedback sinusoidal voltage synchronous base circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207588469U true CN207588469U (en) | 2018-07-06 |
Family
ID=62728158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721363693.6U Expired - Fee Related CN207588469U (en) | 2017-10-23 | 2017-10-23 | A kind of energy feedback sinusoidal voltage synchronous base circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207588469U (en) |
-
2017
- 2017-10-23 CN CN201721363693.6U patent/CN207588469U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20191023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |