CN204215302U - Online integrated high precision constant current source - Google Patents
Online integrated high precision constant current source Download PDFInfo
- Publication number
- CN204215302U CN204215302U CN201420681083.0U CN201420681083U CN204215302U CN 204215302 U CN204215302 U CN 204215302U CN 201420681083 U CN201420681083 U CN 201420681083U CN 204215302 U CN204215302 U CN 204215302U
- Authority
- CN
- China
- Prior art keywords
- constant
- circuit
- triode
- current
- resistance
- Prior art date
- 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.)
- Active
Links
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses a kind of online integrated High Precision Constant Current Source, comprise Industrial Frequency Transformer, rectification and filtering circuit, constant-current control circuit, constant-current power circuit and output filter circuit.Utilize Industrial Frequency Transformer isolated buck, utilize operational amplifier and triode Serial regulation output voltage and then adjustment output current to realize constant, utilize the positive and negative power supply of amplifier to realize short circuit constant current.Linear regulation circuit described in the utility model adopts Correctional tube Linear Amplifer principle control technology, and described ac buck circuit adopts firm online Industrial Frequency Transformer adjustment technology.It is adaptable that a kind of online integrated High Precision Constant Current Source of the utility model has electrical network, exports the features such as the precision of voltage regulation is high, output ripple voltage is low, output current is large, output power is large, reliability is high, adaptive capacity to environment is strong.
Description
Technical field
The utility model relates to a kind of power circuit, specifically, relates to a kind of online integrated high-precision constant current source circuit.
Background technology
At present, known linear constant current power supply is the one in constant output current source, and he utilizes Correctional tube Linear Amplifer principle, realizes adjustment output voltage by the line drop adjusting transistor, and then realizing constant output current, its constant current accuracy and response speed are far away higher than other constant-current supplies.But traditional Linear CCS can only realize relative constant current, namely load loses current constant control close to during short circuit.
Utility model content
Technical problem to be solved in the utility model is just the defect overcoming prior art, provides a kind of online integrated High Precision Constant Current Source, and supports short circuit constant current.
The utility model solves the technical scheme that its technical matters adopts:
A kind of online integrated High Precision Constant Current Source, comprises online Industrial Frequency Transformer, rectification and filtering circuit, constant-current control circuit, constant-current power circuit and output filter circuit; AC220 volt exchanges exports to rectification and filtering circuit, the DC voltage V of stable output after online Industrial Frequency Transformer T1 transformation
iN, DC voltage V
iNexport to output filter circuit through constant-current power circuit, constant-current power circuit is controlled by constant-current control circuit; Rectification and filtering circuit are made up of integral bridge type rectifier D1 and filter capacitor C1.
Described online integrated High Precision Constant Current Source, its constant-current power circuit is by triode Q11, Q12, and resistance R20, R11, electric capacity C11, C12, C13 and diode D11 form, and its annexation is: DC voltage V
iNthe collector of connecting triode Q11, Q12, the emitter of triode Q12 is connected with the base stage of triode Q11, and the emitter of triode Q11 is through resistance R20 output+V
oUT, the emitter tie point I of triode Q11 is connected with the tie point I of constant-current control circuit simultaneously, and the base connection point b of triode Q12 is connected with the tie point b of constant-current control circuit, output+V
oUTtie point R is connected with the tie point R of constant-current control circuit; Electric capacity C12 and C13 is connected in parallel on+V
oUTwith-V
oUTbetween, diode D11 just and with-V
oUTbe connected, negative pole and+V
oUTbe connected, resistance R11 is in parallel with electric capacity C11, one end and-V
oUTbe connected, the other end is that tie point ADJ is connected with the tie point ADJ of constant-current control circuit.
Described online integrated High Precision Constant Current Source, its constant-current control circuit is made up of rectifier bridge, DC power supplier, operational amplifier and peripheral circuit, its annexation is: export two-way low-voltage alternating-current after transformer T2 transformation respectively to rectifier bridge B1 and B2, rectifier bridge B1 anode connects the Vin end of DC power supplier IC1 and the positive pole of electric capacity C1, and negative terminal connects power module IC1 ground, electric capacity C1 negative terminal, electric capacity C2 negative terminal, diode D1 anode, diode D2 negative electrode, adjustable resistance R12 and resistance R5 one end, electric capacity C5 positive pole and tie point I; The Vout end of power module IC1 connects 8 pin of C2 positive pole, R1 and operational amplifier IC3; No. 1 amplifier in-phase end of R3 mono-termination R2 and operational amplifier IC3, connects ADJ tie point after other end serial connection adjustable resistance R13; No. 1 amplifier end of oppisite phase of operational amplifier IC3 is connected between resistance R4 and R5, connects tie point b after output terminal series resistor R6; Rectifier bridge B2 anode connects the Vin end of DC power supplier IC2 and the positive pole of electric capacity C3, and negative terminal connects DC power supplier IC2 ground, electric capacity C3 and C4 negative terminal, resistance R11,4 pin of operational amplifier IC3, triode Q3 emitter; The Vout termination capacitor C4 of DC power supplier IC2 and C5 positive pole, triode D2 negative electrode and adjustable resistance R12 one end; No. 2 amplifier in-phase ends connection electric capacity C5 negative poles of operational amplifier IC3, the other end of adjustable resistance R12 and resistance R10 one end, the resistance R10 other end is connected between diode D2 anode and resistance R11; Tie point R is connected after No. 2 amplifier end of oppisite phase series resistor R8 of operational amplifier IC3, electric capacity C6 is connected between No. 2 amplifier end of oppisite phase of operational amplifier IC3 and output terminal, connecting triode Q3 base stage after output terminal series resistor R9, triode Q3 collector is connected with tie point b.
The online integrated High Precision Constant Current Source of the utility model, input adopts Industrial Frequency Transformer step-down, direct current exports and adopts operational amplifier and adjustment triode adjustment voltage, and then realize constant output current, utilize the positive and negative power supply of amplifier to realize short circuit constant current, adopt entity embedding all-metal closed structure to improve adaptive capacity to environment.
The course of work of the present utility model is: alternating current 220V input first carries out isolated buck through Industrial Frequency Transformer, to meet the low voltage difference requirement of rear class adjustment triode, be converted to pulsating direct current through current rectifying and wave filtering circuit, the controlling circuit of voltage regulation of recycling operational amplifier composition realizes adjustment voltage by adjustment transistor base electric current and exports.Wherein, exporting sampling adopts resistor string to be associated on outlet line, detects output current change, feed back to Circuit tuning and carry out output voltage adjustment by the change in voltage detecting sampling resistor two ends, when making load change, the adjustment of output voltage simultaneous adaptation, achieves the constant of output current.
The utility model has the following advantages compared with traditional linear power supply:
1, online mode of operation, directly accesses utility grid work.
2, constant current accuracy is higher than 5 ‰.
3, short circuit constant current mode is supported.
4, all-metal sealing, entity embedding, resistance to harsh environment for use.
5, power supply grid is compatible strong.
The beneficial effect of the online integrated High Precision Constant Current Source of the utility model is that constant current accuracy is high, can 0V constant current output, support short circuit constant current, there is electrical network adaptable, export the features such as the precision of voltage regulation is high, output ripple voltage is low, output current is large, output power is large, reliability is high, adaptive capacity to environment is strong.
Accompanying drawing explanation
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is the utility model input power frequency step-down and current rectifying and wave filtering circuit schematic diagram.
Fig. 3 is the utility model constant-current power circuit theory diagrams.
Fig. 4 is the utility model constant-current control circuit schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As illustrated in fig. 1 and 2, the online integrated High Precision Constant Current Source of the utility model, comprises online Industrial Frequency Transformer, rectification and filtering circuit, constant-current control circuit, constant-current power circuit and output filter circuit; AC220 volt exchanges exports to rectification and filtering circuit, the DC voltage V of stable output after online Industrial Frequency Transformer T1 transformation
iN, DC voltage V
iNexport to output filter circuit through constant-current power circuit, constant-current power circuit is controlled by constant-current control circuit; Rectification and filtering circuit are made up of integral bridge type rectifier D1 and filter capacitor C1.
As shown in Figure 3, described online integrated High Precision Constant Current Source, its constant-current power circuit is by triode Q11, Q12, and resistance R20, R11, electric capacity C11, C12, C13 and diode D11 form, and its annexation is: DC voltage V
iNthe collector of connecting triode Q11, Q12, the emitter of triode Q12 is connected with the base stage of triode Q11, and the emitter of triode Q11 is through resistance R20 output+V
oUT, the emitter tie point I of triode Q11 is connected with the tie point I of constant-current control circuit simultaneously, and the base connection point b of triode Q12 is connected with the tie point b of constant-current control circuit, output+V
oUTtie point R is connected with the tie point R of constant-current control circuit; Electric capacity C12 and C13 is connected in parallel on+V
oUTwith-V
oUTbetween, diode D11 just and with-V
oUTbe connected, negative pole and+V
oUTbe connected, resistance R11 is in parallel with electric capacity C11, one end and-V
oUTbe connected, the other end is that tie point ADJ is connected with the tie point ADJ of constant-current control circuit.
As shown in Figure 4, described online integrated High Precision Constant Current Source, its constant-current control circuit is made up of operational amplifier, triode etc., by the divider resistance of output terminal, output voltage is sampled, then feed back to the in-phase end of operational amplifier 1, compare with the reference voltage of end of oppisite phase, output signal controls transistor base electric current after amplifying, to adjust triode on resistance, and then adjustment output voltage, realize output voltage relatively stable; By the sample resistance that outlet line is connected, output current is sampled, then the in-phase end of operational amplifier 2 is fed back to, compare with the reference voltage of end of oppisite phase, output signal controls transistor base electric current after amplifying, to adjust triode on resistance, and then adjustment output voltage, realize exporting electric current constant.Voltage stabilizing exports supply load after filter capacitor filtering.Its annexation is: export two-way low-voltage alternating-current after transformer T2 transformation respectively to rectifier bridge B1 and B2, rectifier bridge B1 anode connects the Vin end of DC power supplier IC1 and the positive pole of electric capacity C1, and negative terminal connects power module IC1 ground, electric capacity C1 negative terminal, electric capacity C2 negative terminal, diode D1 anode, diode D2 negative electrode, adjustable resistance R12 and resistance R5 one end, electric capacity C5 positive pole and tie point I; The Vout end of power module IC1 connects 8 pin of C2 positive pole, R1 and operational amplifier IC3; No. 1 amplifier in-phase end of R3 mono-termination R2 and operational amplifier IC3, connects ADJ tie point after other end serial connection adjustable resistance R13; No. 1 amplifier end of oppisite phase of operational amplifier IC3 is connected between resistance R4 and R5, connects tie point b after output terminal series resistor R6; Rectifier bridge B2 anode connects the Vin end of DC power supplier IC2 and the positive pole of electric capacity C3, and negative terminal connects DC power supplier IC2 ground, electric capacity C3 and C4 negative terminal, resistance R11,4 pin of operational amplifier IC3, triode Q3 emitter; The Vout termination capacitor C4 of DC power supplier IC2 and C5 positive pole, triode D2 negative electrode and adjustable resistance R12 one end; No. 2 amplifier in-phase ends connection electric capacity C5 negative poles of operational amplifier IC3, the other end of adjustable resistance R12 and resistance R10 one end, the resistance R10 other end is connected between diode D2 anode and resistance R11; Tie point R is connected after No. 2 amplifier end of oppisite phase series resistor R8 of operational amplifier IC3, electric capacity C6 is connected between No. 2 amplifier end of oppisite phase of operational amplifier IC3 and output terminal, connecting triode Q3 base stage after output terminal series resistor R9, triode Q3 collector is connected with tie point b.
The utility model is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the utility model drawn under enlightenment of the present utility model, all drops within protection domain of the present utility model.
Claims (3)
1. an online integrated High Precision Constant Current Source, comprises online Industrial Frequency Transformer, rectification and filtering circuit, constant-current control circuit, constant-current power circuit and output filter circuit; It is characterized in that: AC220 volt exchanges exports to rectification and filtering circuit, the DC voltage V of stable output after online Industrial Frequency Transformer T1 transformation
iN, DC voltage V
iNexport to output filter circuit through constant-current power circuit, constant-current power circuit is controlled by constant-current control circuit; Rectification and filtering circuit are made up of integral bridge type rectifier D1 and filter capacitor C1.
2. online integrated High Precision Constant Current Source according to claim 1, it is characterized in that: constant-current power circuit is by triode Q11, Q12, resistance R20, R11, electric capacity C11, C12, C13 and diode D11 form, and its annexation is: DC voltage V
iNthe collector of connecting triode Q11, Q12, the emitter of triode Q12 is connected with the base stage of triode Q11, and the emitter of triode Q11 is through resistance R20 output+V
oUT, the emitter tie point I of triode Q11 is connected with the tie point I of constant-current control circuit simultaneously, and the base connection point b of triode Q12 is connected with the tie point b of constant-current control circuit, output+V
oUTtie point R is connected with the tie point R of constant-current control circuit; Electric capacity C12 and C13 is connected in parallel on+V
oUTwith-V
oUTbetween, diode D11 just and with-V
oUTbe connected, negative pole and+V
oUTbe connected, resistance R11 is in parallel with electric capacity C11, one end and-V
oUTbe connected, the other end is that tie point ADJ is connected with the tie point ADJ of constant-current control circuit.
3. online integrated High Precision Constant Current Source according to claim 1, it is characterized in that: constant-current control circuit is by rectifier bridge, DC power supplier, operational amplifier and peripheral circuit composition, its annexation is: export two-way low-voltage alternating-current after transformer T2 transformation respectively to rectifier bridge B1 and B2, rectifier bridge B1 anode connects the Vin end of DC power supplier IC1 and the positive pole of electric capacity C1, negative terminal connects power module IC1 ground, electric capacity C1 negative terminal, electric capacity C2 negative terminal, diode D1 anode, diode D2 negative electrode, adjustable resistance R12 and resistance R5 one end, electric capacity C5 positive pole and tie point I, the Vout end of power module IC1 connects 8 pin of C2 positive pole, R1 and operational amplifier IC3, No. 1 amplifier in-phase end of R3 mono-termination R2 and operational amplifier IC3, connects ADJ tie point after other end serial connection adjustable resistance R13, No. 1 amplifier end of oppisite phase of operational amplifier IC3 is connected between resistance R4 and R5, connects tie point b after output terminal series resistor R6, rectifier bridge B2 anode connects the Vin end of DC power supplier IC2 and the positive pole of electric capacity C3, and negative terminal connects DC power supplier IC2 ground, electric capacity C3 and C4 negative terminal, resistance R11,4 pin of operational amplifier IC3, triode Q3 emitter, the Vout termination capacitor C4 of DC power supplier IC2 and C5 positive pole, triode D2 negative electrode and adjustable resistance R12 one end, No. 2 amplifier in-phase ends connection electric capacity C5 negative poles of operational amplifier IC3, the other end of adjustable resistance R12 and resistance R10 one end, the resistance R10 other end is connected between diode D2 anode and resistance R11, tie point R is connected after No. 2 amplifier end of oppisite phase series resistor R8 of operational amplifier IC3, electric capacity C6 is connected between No. 2 amplifier end of oppisite phase of operational amplifier IC3 and output terminal, connecting triode Q3 base stage after output terminal series resistor R9, triode Q3 collector is connected with tie point b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420681083.0U CN204215302U (en) | 2014-11-14 | 2014-11-14 | Online integrated high precision constant current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420681083.0U CN204215302U (en) | 2014-11-14 | 2014-11-14 | Online integrated high precision constant current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204215302U true CN204215302U (en) | 2015-03-18 |
Family
ID=52983958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420681083.0U Active CN204215302U (en) | 2014-11-14 | 2014-11-14 | Online integrated high precision constant current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204215302U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407660A (en) * | 2014-11-14 | 2015-03-11 | 航天长峰朝阳电源有限公司 | Online integration high-precision constant current source |
| CN113093850A (en) * | 2021-03-17 | 2021-07-09 | 海安天一智控设备有限公司 | Method for generating standard sine wave AC constant current source |
-
2014
- 2014-11-14 CN CN201420681083.0U patent/CN204215302U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407660A (en) * | 2014-11-14 | 2015-03-11 | 航天长峰朝阳电源有限公司 | Online integration high-precision constant current source |
| CN104407660B (en) * | 2014-11-14 | 2016-04-13 | 航天长峰朝阳电源有限公司 | Online integrated high precision constant current source |
| CN113093850A (en) * | 2021-03-17 | 2021-07-09 | 海安天一智控设备有限公司 | Method for generating standard sine wave AC constant current source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104407660B (en) | Online integrated high precision constant current source | |
| CN205377693U (en) | Output current continuously adjustable high efficiency switching power supply | |
| CN201408996Y (en) | Three-phase input equal current-sharing controller with power factor correction | |
| CN103763812B (en) | A kind of solar energy and semiconductor illuminator based on DSP and control method thereof | |
| CN204652713U (en) | A kind of LED drive power of no electrolytic capacitor | |
| CN205039717U (en) | Output polarity automatic switching's D.C. regulated power supply | |
| CN103701341A (en) | Voltage following type depth negative feedback constant current source device | |
| CN105226970A (en) | The D.C. regulated power supply that output polarity is changed automatically | |
| CN204215302U (en) | Online integrated high precision constant current source | |
| CN104113199A (en) | Active PFC circuit and control method thereof | |
| CN105334898B (en) | A kind of voltage regulator control circuit in AC voltage regulator | |
| CN202617008U (en) | Frequency modulation control circuit realized by using SG3525 chip | |
| CN205160397U (en) | High -pressure linear stabilized power supply of online integrated integration | |
| CN204406258U (en) | A kind of current source circuit based on Switching Power Supply | |
| CN204103577U (en) | Online integrated switch mode constant current charger | |
| CN204205959U (en) | A kind of DC-DC power source converter circuit | |
| CN203301359U (en) | Active PFC circuit | |
| CN204705931U (en) | Wide region is adjustable linear stabilized power supply | |
| CN202617007U (en) | Frequency modulation control circuit realized by using UC3846 chip | |
| CN205265545U (en) | Extremely low ripple switching power supply of integrated integration of off -line | |
| CN203896209U (en) | Low-voltage three-phase input voltage boosting and reducing DC power supply device | |
| CN204578382U (en) | A kind of single-chip switching stabilized voltage power supply | |
| CN203504440U (en) | High-power linear output high-voltage stabilizer | |
| CN205092641U (en) | Online integrated integration monolithic formula linear -charging ware | |
| CN205123604U (en) | Online integrated integration monolithic formula switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |