CN202475265U - Voltage feedback isolating circuit - Google Patents
Voltage feedback isolating circuit Download PDFInfo
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- CN202475265U CN202475265U CN2012200990972U CN201220099097U CN202475265U CN 202475265 U CN202475265 U CN 202475265U CN 2012200990972 U CN2012200990972 U CN 2012200990972U CN 201220099097 U CN201220099097 U CN 201220099097U CN 202475265 U CN202475265 U CN 202475265U
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Abstract
The utility model relates to a voltage feedback isolating circuit comprising a divider resistor, an operational shaper, a voltage-controlled oscillator, a pulse transformer, a frequency to voltage converter, an output operational amplifier and an isolating power supply. The output end of the divider resistor is connected with the input end of the operational shaper, the output end of the operational shaper is connected with the input end of the pulse transformer, the output end of the pulse transformer is connected with the frequency to voltage transformer, and the output end of the frequency to voltage transformer is connected with the output end of the output operational amplifier. The voltage feedback isolating circuit has the advantages of simple structure, good input and output linearity, high precision and quick response speed.
Description
Technical field:
The utility model relates to a kind of circuit, particularly a kind of Voltage Feedback buffer circuit.
Background technology:
At present, following several method is arranged generally in the power source voltage feedback circuit: 1, electric resistance partial pressure, this method main circuit and control circuit are not isolated; 2, adopt the Hall components and parts, this method can be isolated major loop and control loop, but cost is higher; 3, adopt linear optical coupling, this method must make the linearity range of circuit working at optocoupler, otherwise the linearity is bad, and is relatively more responsive to temperature.
Summary of the invention:
The purpose of the utility model is in order to overcome above deficiency, and a kind of isolation that realizes between input signal and the output is provided, a kind of Voltage Feedback buffer circuit that not influenced by extraneous factor such as temperature.
The purpose of the utility model realizes through following technical scheme: a kind of Voltage Feedback buffer circuit; Comprise divider resistance; Amplifier reshaper, voltage controlled oscillator, pulse transformer, FV convertor, output transport and placing device, insulating power supply; The output of divider resistance is connected with the input of amplifier reshaper, and the output of amplifier reshaper is connected with the input of pulse transformer, and the output of pulse transformer is connected with FV convertor; The output of FV convertor is connected with the output of output transport and placing device, and the input and output point voltage provides respectively through insulating power supply.
The advantage that the utility model compared with prior art has is: input and output linearity degree is good, and precision is high, and response speed is fast, and the isolation voltage between input and output can be accomplished more than the 3KV, in thyristor supply and other power-supply systems, can be used as feedback or isolates usefulness.
Description of drawings:
Fig. 1 is the structural representation of the utility model;
Label among the figure: 1-divider resistance, 2-amplifier reshaper, 3-voltage controlled oscillator, 4-pulse transformer, 5-FV convertor, 6-output transport and placing device, 7-insulating power supply.
Embodiment:
In order to deepen understanding to the utility model, will combine embodiment and accompanying drawing that the utility model is done further to detail below, this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection range.
Show a kind of execution mode of a kind of Voltage Feedback buffer circuit of the utility model like Fig. 1: comprise divider resistance 1; Amplifier reshaper 2, voltage controlled oscillator 3, pulse transformer 4, FV convertor 5, output transport and placing device 6, insulating power supply 7; The output of divider resistance 1 is connected with the input of amplifier reshaper 2; The output of amplifier reshaper 2 is connected with the input of pulse transformer 4; The output of pulse transformer 4 is connected with FV convertor 5; The output of FV convertor 5 is connected with the output of output transport and placing device 6, and the input and output point voltage provides respectively through insulating power supply 7, and input voltage and output voltage are isolated fully.
Embodiment 1: input signal uses divider resistance 1 to be divided to 0-100mV according to different input voltages; The 0-100mV signal amplifies through amplifier reshaper 2 and converts 0-10V to; The 0-10V signal converts the high-frequency pulse signal of 0KHz-100KHz again to through voltage controlled oscillator 3; Use 4 pairs of signals of pulse transformer to isolate, transformer voltage ratio is 1:1, and the high-frequency pulse signal after the isolation advances overfrequency electric pressure converter 5 again and is reduced into electric 0-5V analog signal; The 0-5V analog signal is reduced into the 0-10V signal through output transport and placing device 6 adjustment zero-bit and slopes.
The utility model is set in 100KHz, because the height of frequency has determined the resolution of conversion, 100KHz can satisfy most of demand, and as bringing up to 1MHz to frequency in order to improve resolution, the isolation voltage of isolating transformer can reach more than several kilovolts.
The utility model is in order further to reduce cost and volume also can adopt optocoupler to replace isolating transformer to isolate; Highest frequency generally can reach hundreds of KHz; The relative transformer of isolation voltage will hang down, and it is not too high to satisfy isolation voltage, and resolution is hanged down a little occasions.
The input of the utility model is the positive signal input, also can be revised as the input of FV convertor 5 ± 5V, makes circuit can accomplish the isolation of AC signal input and output.
The utility model is simple in structure, the linear degree of input and output is good, and precision is high, and response speed is fast, and the isolation voltage between input and output can be accomplished 3KV, in thyristor supply and other power-supply systems, can be used as feedback or isolates usefulness.
Claims (1)
1. Voltage Feedback buffer circuit; It is characterized in that: comprise divider resistance (1); Amplifier reshaper (2), voltage controlled oscillator (3), pulse transformer (4), FV convertor (5), output transport and placing device (6), insulating power supply (7); The output of said divider resistance (1) is connected with the input of amplifier reshaper (2); The output of said amplifier reshaper (2) is connected with the input of pulse transformer (4); The output of said pulse transformer (4) is connected with FV convertor (5), and the output of said FV convertor (5) is connected with the output of output transport and placing device (6), and the input and output point voltage provides respectively through insulating power supply (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200990972U CN202475265U (en) | 2012-03-16 | 2012-03-16 | Voltage feedback isolating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200990972U CN202475265U (en) | 2012-03-16 | 2012-03-16 | Voltage feedback isolating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475265U true CN202475265U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200990972U Expired - Fee Related CN202475265U (en) | 2012-03-16 | 2012-03-16 | Voltage feedback isolating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202475265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611314A (en) * | 2012-03-16 | 2012-07-25 | 南通金枫电气有限公司 | Voltage feedback isolation circuit |
-
2012
- 2012-03-16 CN CN2012200990972U patent/CN202475265U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611314A (en) * | 2012-03-16 | 2012-07-25 | 南通金枫电气有限公司 | Voltage feedback isolation circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Jian Inventor after: Zong Shu Inventor before: Guo Jian |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: GUO JIAN TO: GUO JIAN ZONG SHU |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20210316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |