CN102185503A - High-power adjustable voltage-stabilized power supply manufactured by reference voltage source - Google Patents
High-power adjustable voltage-stabilized power supply manufactured by reference voltage source Download PDFInfo
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- CN102185503A CN102185503A CN201110082799XA CN201110082799A CN102185503A CN 102185503 A CN102185503 A CN 102185503A CN 201110082799X A CN201110082799X A CN 201110082799XA CN 201110082799 A CN201110082799 A CN 201110082799A CN 102185503 A CN102185503 A CN 102185503A
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Abstract
The invention belongs to the technical fields of electronics and power supplies and discloses a high-power adjustable voltage-stabilized power supply manufactured by a reference voltage source. The voltage-stabilized power supply consists of an alternating current (AC) transformer B and a full-bridge rectifying circuit, a half-wave rectifying and filtering circuit, an adjusting tube BG1, a sampling amplifying circuit, a current-limiting protection circuit and a voltage-dividing and sampling circuit, and is characterized in that: the sampling amplifying circuit consists of a three-end adjustable current-dividing reference voltage source IC1 and a resistor R1; the adjusting tube BG1 is an enhanced N-channel high-power field-effect tube; the current-limiting protection circuit consists of a silicon triode BG2 and a current sampling resistor R2; and the voltage-dividing and sampling circuit consists of a potentiometer RP and a voltage-dividing resistor R3. The adjustable voltage-stabilized power supply outputs heavy current and adjustable voltage, the circuit has an overcurrent protection function, and particularly the conversion efficiency and working reliability of the adjustable voltage-stabilized power supply are improved.
Description
Technical field
The invention belongs to electronics and power technique fields, is the high-power adjustable stabilized voltage supply of making of reference voltage source about a kind of.
Background technology
High-power adjustable stabilized voltage supply is the equipment of general circuit design personnel or laboratory indispensability.High-power silicon transistor of adjustment Guan Duoyong or germanium transistor in the high-power in the past series connection adjustable stabilized voltage supply, its major defect are big, the difficult stabilized voltage power supplys of making the big electric current of output of loss of adjusting pipe, cause the efficient of power source conversion very low.In order to solve or remedy all shortcoming of some adjustable stabilized voltage supply existence on the market, the high-power adjustable stabilized voltage supply of making of reference voltage source of the present invention, adopt the sampling amplification circuit of the adjustable shunting reference voltage source of high accuracy three ends TL431 as circuit, adopt the adjustment pipe of enhancement mode N channel high power field effect transistor as power supply, this stabilized voltage power supply not only can be exported big electric current, Adjustable Output Voltage, and has improved the conversion efficiency of power supply and the reliability of work greatly.
Below describe in detail this with related relevant technologies content in the high-power adjustable stabilized voltage supply manufacturing process of reference voltage source making.
Summary of the invention
Goal of the invention and beneficial effect: the high-power adjustable stabilized voltage supply of making of reference voltage source of the present invention; adopted the sampling amplification circuit of the adjustable shunting reference voltage source of high accuracy three ends TL431 in the circuit as circuit; adopt the adjustment pipe of enhancement mode N channel high power field effect transistor as power supply; this stabilized voltage power supply not only can be exported big electric current, Adjustable Output Voltage; and circuit also designed overcurrent protection function, particularly improved the conversion efficiency of power supply and the reliability of work.
Technical scheme: with the high-power adjustable stabilized voltage supply of reference voltage source making; form by AC transformer B and full bridge rectifier, halfwave rectifier and filter circuit, adjustment pipe BG1, sampling amplification circuit, current-limiting protection circuit, pressure sampling circuit, it is characterized in that:
Sampling amplification circuit: form by three ends adjustable shunting reference voltage source IC1 and resistance R 1;
Adjust pipe BG1: adopt enhancement mode N channel high power field effect transistor, model is 2SK790;
Current-limiting protection circuit: form by silicon triode BG2 and current sampling resistor R2;
Dividing potential drop and sample circuit: form by potentiometer RP and divider resistance R3.
Connection features in the composition of each several part circuit and the circuit between the components and parts
The feature of AC transformer B and full bridge rectifier is: the two ends of AC transformer B secondary coil L1 connect the alternating current input of full-bridge rectification element QZ respectively, the cathode output end a point of full-bridge rectification element QZ connects the positive pole of electrochemical capacitor C2 and adjusts the drain electrode of pipe BG1, the cathode output end b point of full-bridge rectification element QZ links to each other with the negative pole of electrochemical capacitor C2 and circuit ground GND, two termination civil power alternating currents of AC transformer B primary coil.
The feature of halfwave rectifier and filter circuit is: the positive pole of the independent termination silicon rectifier diode D1 of AC transformer B secondary coil L2, the negative pole of silicon rectifier diode D1 connects the positive pole of electrochemical capacitor C1 and an end of resistance R 1, the grid of another termination adjustment pipe BG1 of resistance R 1, the negative pole connection circuit ground GND of electrochemical capacitor C1.
The feature of sampling amplification circuit is: the K pin of three ends are adjustable shunting reference voltage source IC1 connect adjust pipe BG1 grid, the R pin of three ends are adjustable shunting reference voltage source IC1 connects the positive pole of electrochemical capacitor C3, three ends the are adjustable A pin of shunting reference voltage source IC1 and the negative pole connection circuit ground GND of electrochemical capacitor C3.
The feature of current-limiting protection circuit is: the base stage of silicon triode BG2 connects the source electrode of adjustment pipe BG1 and the end of current sampling resistor R2; the collector electrode of silicon triode BG2 connects the grid of adjusting pipe BG1, and the other end of the emitter of silicon triode BG2, current sampling resistor R2, the end of potentiometer RP link to each other with the anodal VCC of output end of stabilized voltage supply.
The feature of dividing potential drop and sample circuit is: the end of another termination divider resistance R3 of potentiometer RP, three ends the are adjustable R pin of shunting reference voltage source IC1 and the positive pole of electrochemical capacitor C3, the negative pole of the other end of divider resistance R3, electrochemical capacitor C3 links to each other with circuit ground GND.
The circuit working principle: civil power 220V voltage is through AC transformer B step-down, full bridge rectifier QZ, electrochemical capacitor C1 filtering; form DC power supply (Vbc=60V) by silicon rectifier diode D1, electrochemical capacitor C1; form bleeder circuit by potentiometer RP, divider resistance R3; form sampling amplification circuit by the adjustable shunting reference voltage source of three ends IC1, resistance R 1; silicon triode BG2, resistance R 2 are formed current-limiting protection circuit; enhancement mode N channel high power field effect transistor BG1 adjusts pipe, and electrochemical capacitor C4 is an output filter circuit.Output voltage stabilizing process: when output end voltage reduced, the voltage that f is ordered reduced, the voltage increases that after amplify the inside of the adjustable shunting reference voltage source of three ends IC1, d is ordered, and after enhancement mode N channel high power field effect transistor BG1 adjusted, the voltage that e is ordered raise; Otherwise when output end voltage increased, the voltage that f is ordered raise, and the voltage that d is ordered reduces, and after enhancement mode N channel high power field effect transistor BG1 adjusted, the voltage that e is ordered reduced, thereby made the voltage of output stable.When output current during greater than 6A, silicon triode BG2 is in cut-off state, and output current is limited in the 6A, thereby reaches the purpose of current limliting.
Description of drawings
Accompanying drawing is to the invention provides an embodiment circuit working schematic diagram with the high-power adjustable stabilized voltage supply of reference voltage source making.
Embodiment
Implement according to the circuit working schematic diagram of the high-power adjustable stabilized voltage supply of making of reference voltage source shown in the accompanying drawing and the components and parts specification requirement of description of drawings and the following stated, can realize the present invention.
The selection of components and parts and technical parameter thereof
QZ is the full-bridge rectification element, requires operating current 〉=10A;
IC1 is the adjustable shunting reference voltage sources of three ends, model TL431, and packing forms T0-92, pin is respectively: the R pin is that reference edge, A pin are negative pole for anodal, K pin; The output voltage at anodal A pin and negative pole K pin two ends is adjustable continuously in 2.5～36V scope, and current margin is wide to be 0.1～100mA, and the dynamic electric resistor representative value is 0.2 Ω;
BG1 is the big electric current field effect transistor of enhancement mode N channel high power, and model is 2SK790;
BG2 is a silicon triode, selects models such as 2SC9013,3DG8050,3DG12 for use, requires β 〉=110;
D1 selects 1N4004 type silicon rectifier diode for use;
Power 〉=the 2W of resistance R 1, resistance are 2K Ω; Power 〉=the 5W of resistance R 2, resistance are 0.1 Ω; Resistance R 3 is a RTX-1/4W type metalfilmresistor, and resistance is 470 Ω; RP is potentiometer 5.6K Ω;
C1 selects the electrochemical capacitor of 47 μ F/160V for use; C2 selects the electrochemical capacitor of 3300 μ F/50V for use; C3 selects the electrochemical capacitor of 4.7 μ F/50V for use; C4 selects the electrochemical capacitor of 470 μ F/50V for use.
Circuit production and debugging
Power transformer B requires power 〉=250W, and the voltage of secondary coil L1 is 28V, require electric current 〉=10A of coil L1, the voltage of secondary coil L2 is 35V, require the electric current of coil L2 〉=0.1.
When making the circuit of the high-power adjustable stabilized voltage supply of making of reference voltage source, as long as the electronic devices and components performance of selecting for use is intact, and the components and parts annexation in the accompanying drawing is welded to specifications, after the physical connection line of circuit and welding quality process scrutiny were errorless, circuit only need simply be debugged and get final product operate as normal.
When debugging, if the direct voltage that discovery c is ordered can suitably reduce the resistance of resistance R 1 over the ground greater than 60V; The resistance of resistance R 2 requires accurately, if its resistance can improve the output current of stabilized voltage power supply less than 0.1 Ω, otherwise will reduce output current.
Claims (6)
1. high-power adjustable stabilized voltage supply of making of reference voltage source is made up of AC transformer B and full bridge rectifier, halfwave rectifier and filter circuit, adjustment pipe BG1, sampling amplification circuit, current-limiting protection circuit, pressure sampling circuit, it is characterized in that:
Sampling amplification circuit: form by three ends adjustable shunting reference voltage source IC1 and resistance R 1;
Adjust pipe BG1: adopt enhancement mode N channel high power field effect transistor, model is 2SK790;
Current-limiting protection circuit: form by silicon triode BG2 and current sampling resistor R2;
Dividing potential drop and sample circuit: form by potentiometer RP and divider resistance R3.
2. the high-power adjustable stabilized voltage supply of making of reference voltage source according to claim 1, the feature of AC transformer B and full bridge rectifier is: the two ends of AC transformer B secondary coil L1 connect the alternating current input of full-bridge rectification element QZ respectively, the cathode output end a point of full-bridge rectification element QZ connects the positive pole of electrochemical capacitor C2 and adjusts the drain electrode of pipe BG1, the cathode output end b point of full-bridge rectification element QZ links to each other with the negative pole of electrochemical capacitor C2 and circuit ground GND, two termination civil power alternating currents of AC transformer B primary coil.
3. the high-power adjustable stabilized voltage supply of making of reference voltage source according to claim 1, the feature of halfwave rectifier and filter circuit is: the positive pole of the independent termination silicon rectifier diode D1 of AC transformer B secondary coil L2, the negative pole of silicon rectifier diode D1 connects the positive pole of electrochemical capacitor C1 and an end of resistance R 1, the grid of another termination adjustment pipe BG1 of resistance R 1, the negative pole connection circuit ground GND of electrochemical capacitor C1.
4. the high-power adjustable stabilized voltage supply of making of reference voltage source according to claim 1, the feature of sampling amplification circuit is: the K pin of three ends are adjustable shunting reference voltage source IC1 connect adjust pipe BG1 grid, the R pin of three ends are adjustable shunting reference voltage source IC1 connects the positive pole of electrochemical capacitor C3, three ends the are adjustable A pin of shunting reference voltage source IC1 and the negative pole connection circuit ground GND of electrochemical capacitor C3.
5. the high-power adjustable stabilized voltage supply of making of reference voltage source according to claim 1; the feature of current-limiting protection circuit is: the base stage of silicon triode BG2 connects the source electrode of adjustment pipe BG1 and the end of current sampling resistor R2; the collector electrode of silicon triode BG2 connects the grid of adjusting pipe BG1, and the other end of the emitter of silicon triode BG2, current sampling resistor R2, the end of potentiometer RP link to each other with the anodal VCC of output end of stabilized voltage supply.
6. divide the high-power adjustable stabilized voltage supply of making of reference voltage source according to claim 1, the feature of dividing potential drop and sample circuit is: the end of another termination divider resistance R3 of potentiometer RP, three ends the are adjustable R pin of shunting reference voltage source IC1 and the positive pole of electrochemical capacitor C3, the negative pole of the other end of divider resistance R3, electrochemical capacitor C3 links to each other with circuit ground GND.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110082799XA CN102185503A (en) | 2011-04-01 | 2011-04-01 | High-power adjustable voltage-stabilized power supply manufactured by reference voltage source |
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| CN201110082799XA CN102185503A (en) | 2011-04-01 | 2011-04-01 | High-power adjustable voltage-stabilized power supply manufactured by reference voltage source |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026648A (en) * | 2016-06-14 | 2016-10-12 | 四川福豆科技有限公司 | Server based on educational resource sharing system |
| CN106452063A (en) * | 2016-10-27 | 2017-02-22 | 江苏吉泰科电气股份有限公司 | Power source control circuit of automobile inverter |
| CN112584580A (en) * | 2020-12-22 | 2021-03-30 | 安徽亮亮电子科技有限公司 | Programmable adjustable output drive high-power supply |
| CN113625820A (en) * | 2021-09-06 | 2021-11-09 | 武汉职业技术学院 | Current-limiting protection circuit with wide power supply voltage range |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1039159A (en) * | 1988-06-28 | 1990-01-24 | 明昌连 | Gated separable power adapter |
| CN201985772U (en) * | 2011-04-01 | 2011-09-21 | 黄宇嵩 | High-power adjustable stabilized voltage power supply manufactured by using reference voltage source |
-
2011
- 2011-04-01 CN CN201110082799XA patent/CN102185503A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039159A (en) * | 1988-06-28 | 1990-01-24 | 明昌连 | Gated separable power adapter |
| CN201985772U (en) * | 2011-04-01 | 2011-09-21 | 黄宇嵩 | High-power adjustable stabilized voltage power supply manufactured by using reference voltage source |
Non-Patent Citations (1)
| Title |
|---|
| 潘玉成: "可调式精密稳压集成电路TL431及应用", 《宁德师专学报（自然科学版）》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026648A (en) * | 2016-06-14 | 2016-10-12 | 四川福豆科技有限公司 | Server based on educational resource sharing system |
| CN106452063A (en) * | 2016-10-27 | 2017-02-22 | 江苏吉泰科电气股份有限公司 | Power source control circuit of automobile inverter |
| CN112584580A (en) * | 2020-12-22 | 2021-03-30 | 安徽亮亮电子科技有限公司 | Programmable adjustable output drive high-power supply |
| CN113625820A (en) * | 2021-09-06 | 2021-11-09 | 武汉职业技术学院 | Current-limiting protection circuit with wide power supply voltage range |
| CN113625820B (en) * | 2021-09-06 | 2022-03-15 | 武汉职业技术学院 | Current-limiting protection circuit with wide power supply voltage range |
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Application publication date: 20110914 |