CN201708695U - Adjustable precise DC regulated power supply - Google Patents
Adjustable precise DC regulated power supply Download PDFInfo
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- CN201708695U CN201708695U CN2010202411778U CN201020241177U CN201708695U CN 201708695 U CN201708695 U CN 201708695U CN 2010202411778 U CN2010202411778 U CN 2010202411778U CN 201020241177 U CN201020241177 U CN 201020241177U CN 201708695 U CN201708695 U CN 201708695U
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Abstract
The utility model relates to a precise DC regulated power supply, which is continuously adjustable between 0V and the set maximum working voltage, and comprises a supply transformer T1, diodes, triodes, resistors and capacitors, wherein one way of the T1 is filtered by a bridge rectifier circuit D1 and a capacitor C1 to obtain an unregulated DC supply of which the anode is connected with the collecting electrodes of the triodes (Q1, Q2 and Q3), a resistor R1 is connected between the collecting electrode and the base electrode of the Q1, a capacitor C2 is connected between the base electrode of the Q1 and the cathode of the DC supply, the emitting electrode of the Q1 is connected with the base electrode of the Q2, the emitting electrode of the Q2 serves as the anode of the DC regulated power supply, and a potentiometer W1 and a capacitor C3 are connected in parallel between the anode and the cathode of the output terminal of the DC regulated power supply; the other way of the transformer T1 is filtered by a bridge rectifier circuit D2 and a capacitor C4 to obtain an unregulated auxiliary DC supply of which the positive output terminal is connected with the cathode of the DC regulated power supply, the cathode thereof is connected with a capacitor C5 after being connected with a resistor R2 in series, and the other end of the C5 is connected with the cathode of the DC regulated power supply; the control terminal and the cathode of a precise voltage stabilizing integrated circuit Q4 are connected with the cathode of the DC regulated power supply, and the anode of the Q4 is connected with the connection point of the R2 and the C5; and the anode of the Q3 is connected with the anode of the Q4, the cathode of the Q3 is connected with the base electrode of the Q1, and the control terminal of the Q3 is connected with the central slip sheet of the W1. The utility model has the characteristics of simple structure and high voltage stabilizing precision.
Description
Technical field
The utility model relates to a kind of adjustable D.C. regulated power supply, it be particularly related to a kind of from zero volt to setting continuously adjustable precision DC stabilized voltage power supply between the maximum operating voltage.
Background technology
Existing series type direct current regulation source, because the voltage of voltage stabilizing didoe is limit, its output voltage generally is higher than the voltage stabilizing value of zener diode.Realize setting continuously adjustable precision DC voltage stabilizing output between the maximum output voltage from zero lying prostrate, must adopt accessory power supply, the pipe of counteracting voltage stabilizing didoe is pressed, and achieves the above object.But existing voltage stabilizing circuit, because components and parts and circuit power factor, voltage stability is low, is difficult to realize accurate voltage stabilizing.
The utility model content
It is core parts that the purpose of this utility model is to provide the accurate integrated stable voltage circuit of a kind of employing, and circuit structure is simple, and output voltage can be from zero volt to setting continuously adjustable precision DC stabilized voltage power supply between the maximum output voltage.
The purpose of this utility model can realize by following circuit.It comprises this adjustable precision D.C. regulated power supply by power transformer T1, diode, triode, resistance, formations such as electric capacity, a road of power transformer T1 output, through bridge rectifier D1, obtain the DC power supply of not voltage stabilizing after capacitor C 1 filtering, the positive pole of the DC power supply of voltage stabilizing is not with triode Q1, the collector electrode of Q2 links to each other, connect resistance R 1 between the collector electrode of triode Q1 and the base stage, be connected with capacitor C 2 between the base stage of triode Q1 and the negative pole of DC power supply, the emitter of triode Q1 links to each other with the base stage of triode Q2, the emitter of triode Q2 is the positive pole of D.C. regulated power supply, between the both positive and negative polarity of D.C. regulated power supply output and be connected to potentiometer W1 and capacitor C 3; Obtain the auxiliary DC power supply of not voltage stabilizing after another road process bridge rectifier D2 of the output of power supply output transformer, capacitor C 4 filtering, the positive output end of auxiliary DC power supply links to each other with the negative pole of D.C. regulated power supply, connect capacitor C 5 behind the negative pole series resistor R2 of auxiliary DC power supply, the other end of capacitor C 5 links to each other with the negative pole of D.C. regulated power supply, the control end of accurate integrated regulator Q4 and the negative pole of Q4 link to each other with the negative pole of D.C. regulated power supply, and the positive pole of Q4 links to each other with the tie point of resistance R 2 with capacitor C 5; The positive pole of accurate integrated regulator Q3 links to each other with the positive pole of accurate integrated regulator Q4, and the negative pole of Q3 links to each other with the base stage of triode Q1, and the center slide plate of the idiostatic device W1 of the control end of Q3 links to each other.For ease of monitoring power supply output situation, all right series current table of circuit, shunt voltage table.
In this circuit, if there is not auxiliary DC power supply, its output voltage, minimum is exactly the voltage stabilizing value of accurate integrated regulator.Under the effect of accessory power supply, the output voltage of accessory power supply is exactly the voltage stabilizing of accurate integrated regulator, because the consistency of element, provide an absolute value identical, positive and negative opposite boost voltage (Vz), thus realized that stabilized voltage power supply lies prostrate continuous adjustable output between the maximum operating voltage from zero.Owing to adopted accurate integrated regulator, circuit structure is simple, and precision of voltage regulation height is easy to realize adjustable precision voltage stabilizing output.Can be used for maintenance circuit, electronic experiment, plating experiment etc. needs stabilized voltage power supply to lie prostrate continuous adjustable output occasion between the maximum operating voltage from zero.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
In circuit shown in Figure 1, it comprises this adjustable precision D.C. regulated power supply by power transformer T1, diode, triode, resistance, formations such as electric capacity, a road of power transformer T1 output, through bridge rectifier D1, obtain the DC power supply of not voltage stabilizing after capacitor C 1 filtering, the positive pole of the DC power supply of voltage stabilizing is not with triode Q1, the collector electrode of Q2 links to each other, connect resistance R 1 between the collector electrode of triode Q1 and the base stage, be connected with capacitor C 2 between the base stage of triode Q1 and the negative pole of DC power supply, the emitter of triode Q1 links to each other with the base stage of triode Q2, the emitter of triode Q2 is the positive pole of D.C. regulated power supply, between the both positive and negative polarity of D.C. regulated power supply output and be connected to potentiometer W1 and capacitor C 3; Obtain the auxiliary DC power supply of not voltage stabilizing after another road process bridge rectifier D2 of the output of power supply output transformer, capacitor C 4 filtering, the positive output end of auxiliary DC power supply links to each other with the negative pole of D.C. regulated power supply, connect capacitor C 5 behind the negative pole series resistor R2 of auxiliary DC power supply, the other end of capacitor C 5 links to each other with the negative pole of D.C. regulated power supply, the control end of accurate integrated regulator Q4 and the negative pole of Q4 link to each other with the negative pole of D.C. regulated power supply, and the positive pole of Q4 links to each other with the tie point of resistance R 2 with capacitor C 5; The positive pole of Q3 links to each other with the positive pole of accurate integrated regulator Q4, and the negative pole of Q3 links to each other with the base stage of triode Q1, and the center slide plate of the idiostatic device W1 of the control end of Q3 links to each other.
Circuit shown in Figure 1 can adopt following parameter: resistance R 1=2K, R2=0.51K, potentiometer W1=4.7k; Capacitor C 1=1000uf, C2=100uf, C3=100uf, C4=470uf, C5=100uf; Triode and rectifier diode can be selected according to stabilized voltage power supply output current and voltage; Accurate integrated regulator Q3, Q4 select TL431 for use.
Claims (1)
1. adjustable precision D.C. regulated power supply, it comprises by power transformer T1, diode, triode, resistance, formations such as electric capacity, it is characterized in that a road of power transformer T1 output, through bridge rectifier D1, obtain the DC power supply of not voltage stabilizing after capacitor C 1 filtering, the positive pole of the DC power supply of voltage stabilizing is not with triode Q1, the collector electrode of Q2 links to each other, connect resistance R 1 between the collector electrode of triode Q1 and the base stage, be connected with capacitor C 2 between the base stage of triode Q1 and the negative pole of DC power supply, the emitter of triode Q1 links to each other with the base stage of triode Q2, the emitter of triode Q2 is the positive pole of D.C. regulated power supply, between the both positive and negative polarity of D.C. regulated power supply output and be connected to potentiometer W1 and capacitor C 3; Obtain the auxiliary DC power supply of not voltage stabilizing after another road process bridge rectifier D2 of the output of power supply output transformer, capacitor C 4 filtering, the positive output end of auxiliary DC power supply links to each other with the negative pole of D.C. regulated power supply, connect capacitor C 5 behind the negative pole series resistor R2 of auxiliary DC power supply, the other end of capacitor C 5 links to each other with the negative pole of D.C. regulated power supply, the control end of accurate integrated regulator Q4 and the negative pole of Q4 link to each other with the negative pole of D.C. regulated power supply, and the positive pole of Q4 links to each other with the tie point of resistance R 2 with capacitor C 5; The positive pole of accurate integrated regulator Q3 links to each other with the positive pole of accurate integrated regulator Q4, and the negative pole of Q3 links to each other with the base stage of triode Q1, and the center slide plate of the idiostatic device W1 of the control end of Q3 links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202411778U CN201708695U (en) | 2010-06-29 | 2010-06-29 | Adjustable precise DC regulated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202411778U CN201708695U (en) | 2010-06-29 | 2010-06-29 | Adjustable precise DC regulated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201708695U true CN201708695U (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202411778U Expired - Fee Related CN201708695U (en) | 2010-06-29 | 2010-06-29 | Adjustable precise DC regulated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201708695U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701338A (en) * | 2013-12-03 | 2014-04-02 | 国家电网公司 | Universal stabilized voltage supply plug-in |
-
2010
- 2010-06-29 CN CN2010202411778U patent/CN201708695U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701338A (en) * | 2013-12-03 | 2014-04-02 | 国家电网公司 | Universal stabilized voltage supply plug-in |
| CN103701338B (en) * | 2013-12-03 | 2017-01-11 | 国家电网公司 | Universal stabilized voltage supply plug-in |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20110629 |