CN104656865A - Adjustable voltage-stabilized power supply circuit of computer - Google Patents
Adjustable voltage-stabilized power supply circuit of computer Download PDFInfo
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- CN104656865A CN104656865A CN201310606314.1A CN201310606314A CN104656865A CN 104656865 A CN104656865 A CN 104656865A CN 201310606314 A CN201310606314 A CN 201310606314A CN 104656865 A CN104656865 A CN 104656865A
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- voltage
- electric capacity
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- voltage stabilizing
- diode
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses an adjustable voltage-stabilized power supply circuit of a computer. The adjustable voltage-stabilized power supply circuit of the computer comprises an AC power supply, a transformer, a bridge rectifier, first to fifth capacitors, a first diode, a second diode, first to fourth resistors, a field-effect tube, a triode, a voltage stabilizing reference source and a potentiometer; when the output voltage drops, the level of a reference electrode of the voltage stabilizing reference source is reduced, the voltage of a negative electrode is increased, and after being adjusted by the filed-effect tube, the level of an emitting electrode of the triode is increased; otherwise, the level of the reference electrode of the voltage stabilizing reference source is increased as the output voltage increases, the voltage of the negative electrode is decreased, and after being adjusted by the field-effect tube, the level of the emitting electrode of the triode is decreased, and as a result, the output voltage is stable; if the output current is more than the set value, the triode is stopped to reach the purpose of limiting the current. According to the adjustable voltage-stabilized power supply circuit of the computer, the output voltage is stabilized by adjusting through the voltage stabilizing reference source and the field-effect tube, the output current is limited to be within the set value, thus the computer can work under a stable voltage, and the service life can be prolonged.
Description
Technical field
The present invention relates to a kind of power circuit for computer, particularly relate to a kind of voltage stabilizing adjustable power circuit of computing machine.
Background technology
Computing machine belongs to light current product, the operating voltage of parts is lower, general within positive and negative 12 volts, and be direct current, and common civil power is 220 volts of alternating currents, can not directly use on machine element, therefore computing machine is the same with a lot of household electrical appliances needs a power unit, be responsible for common civil power to be converted to the operable voltage of computing machine, be generally arranged on computer-internal.The core component operating voltage of computing machine is lower, because computer operation frequency is very high, therefore higher to the requirement of power supply.Computing machine works when spread of voltage for a long time and will performance be caused to reduce, and serviceable life shortens.
Summary of the invention
Object of the present invention is just the voltage stabilizing adjustable power circuit providing a kind of computing machine in order to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of voltage stabilizing adjustable power circuit of computing machine, comprise AC power, transformer, bridge rectifier, first electric capacity is to the 5th electric capacity, first diode, second diode, first resistance is to the 4th resistance, field effect transistor, triode, voltage stabilizing reference source and potentiometer, the first end of described AC power is connected with the first end of the primary coil of described transformer, second end of described AC power is connected with the second end of the primary coil of described transformer, the first end of the secondary coil of described transformer is connected with the first end of described first electric capacity and the first voltage end of described bridge rectifier respectively, second end of the secondary coil of described transformer is connected with the second voltage end of described bridge rectifier, the positive pole of described bridge rectifier respectively with the first end of described 3rd electric capacity, the positive pole of described first diode, the first end of described second electric capacity is connected with the drain electrode of described field effect transistor, the negative pole of described first diode is connected with the second end of described first electric capacity and the positive pole of described second diode respectively, the negative pole of described second diode is connected with the second end of described second electric capacity and the first end of described second resistance respectively, second end of described second resistance respectively with the grid of described field effect transistor, the collector of described triode is connected with the negative electrode of described voltage stabilizing reference source, the source electrode of described field effect transistor is connected with the base stage of described triode and the first end of described 3rd resistance respectively, second end of described 3rd resistance respectively with the emitter of described triode, the first end of described potentiometer, the sliding end of described potentiometer, the first end of described 5th electric capacity is connected with the first voltage output end of described voltage stabilizing adjustable power circuit, second end of described potentiometer respectively with the first end of described 4th electric capacity, the first end of described 4th resistance is connected with the reference pole of described voltage stabilizing reference source, the anode of described voltage stabilizing reference source respectively with the first end of described first resistance, second end of described 4th resistance, second end of described 4th electric capacity, second end of described 5th electric capacity is connected with the second voltage output end of described voltage stabilizing adjustable power circuit, second end of described first resistance is connected with described second end of the 3rd electric capacity and the negative pole of described bridge rectifier respectively.
Beneficial effect of the present invention is:
The present invention is a kind of voltage stabilizing adjustable power circuit of computing machine, output voltage stabilization is made by the adjustment of voltage stabilizing reference source and field effect transistor, and output current is limited in setting value, ensure that computing machine works under stable voltage condition, delayed serviceable life.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the voltage stabilizing adjustable power circuit of a kind of computing machine of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the voltage stabilizing adjustable power circuit of a kind of computing machine of the present invention, comprise AC power AC, transformer T, bridge rectifier BR, first electric capacity C1 is to the 5th electric capacity C5, first diode D1, second diode D2, first resistance R1 is to the 4th resistance R4, field effect transistor FET, triode VT, voltage stabilizing reference source Q and potentiometer RP, the first end of AC power AC is connected with the first end of the primary coil of transformer T, second end of AC power AC is connected with the second end of the primary coil of transformer T, the first end of the secondary coil of transformer T is connected with the first end of the first electric capacity C1 and first voltage end of bridge rectifier BR respectively, second end of the secondary coil of transformer T is connected with second voltage end of bridge rectifier BR, the positive pole of bridge rectifier BR respectively with the first end of the 3rd electric capacity C3, the positive pole of the first diode D1, the first end of the second electric capacity C2 is connected with the drain electrode of field effect transistor FET, the negative pole of the first diode D1 is connected with second end of the first electric capacity C1 and the positive pole of the second diode D2 respectively, the negative pole of the second diode D2 is connected with second end of the second electric capacity C2 and the first end of the second resistance R2 respectively, second end of the second resistance R2 respectively with the grid of field effect transistor FET, the collector of triode VT is connected with the negative electrode of voltage stabilizing reference source Q, the source electrode of field effect transistor FET is connected with the base stage of triode VT and the first end of the 3rd resistance R3 respectively, second end of the 3rd resistance R3 respectively with the emitter of triode VT, the first end of potentiometer RP, the sliding end of potentiometer RP, the first end of the 5th electric capacity C5 is connected with the first voltage output end VO1 of voltage stabilizing adjustable power circuit, second end of potentiometer RP respectively with the first end of the 4th electric capacity C4, the first end of the 4th resistance R4 is connected with the reference pole of voltage stabilizing reference source Q, the anode of voltage stabilizing reference source Q respectively with the first end of the first resistance R1, second end of the 4th resistance R4, second end of the 4th electric capacity C4, second end of the 5th electric capacity C5 is connected with the second voltage output end VO2 of voltage stabilizing adjustable power circuit, second end of the first resistance R1 is connected with second end of the 3rd electric capacity C3 and the negative pole of bridge rectifier BR respectively.
Alternating voltage is through transformer T step-down, bridge rectifier BR rectification, the 3rd electric capacity C3 filtering; in addition; first electric capacity C1, the second electric capacity C2, the first diode D1, the second diode D2 form voltage-multiplying circuit; potentiometer RP and the 4th resistance R4 forms bleeder circuit; second resistance R2 and voltage stabilizing reference source Q forms sampling amplification circuit; 3rd resistance R3 and triode VT forms current-limiting protection circuit, and field effect transistor FET adjusts pipe, and the 5th electric capacity C5 carries out filtering to output voltage.Voltage stabilizing process is: when output voltage reduces, and the reference electrode potential of voltage stabilizing reference source Q reduces, and amplify through voltage stabilizing reference source Q inside and the cathode voltage of voltage stabilizing reference source Q is increased, after field effect transistor FET adjustment, triode VT emitter current potential raises; Otherwise when output voltage increases, the reference electrode potential of voltage stabilizing reference source Q raises, and the cathode voltage of voltage stabilizing reference source Q reduces, and after field effect transistor FET adjustment, triode VT emitter current potential reduces, thus makes output voltage stabilization.When output current is greater than setting value, triode VT ends, and output current is limited in setting value, thus reaches the object of current limliting.
Claims (1)
1. the voltage stabilizing adjustable power circuit of a computing machine, it is characterized in that: comprise AC power, transformer, bridge rectifier, first electric capacity is to the 5th electric capacity, first diode, second diode, first resistance is to the 4th resistance, field effect transistor, triode, voltage stabilizing reference source and potentiometer, the first end of described AC power is connected with the first end of the primary coil of described transformer, second end of described AC power is connected with the second end of the primary coil of described transformer, the first end of the secondary coil of described transformer is connected with the first end of described first electric capacity and the first voltage end of described bridge rectifier respectively, second end of the secondary coil of described transformer is connected with the second voltage end of described bridge rectifier, the positive pole of described bridge rectifier respectively with the first end of described 3rd electric capacity, the positive pole of described first diode, the first end of described second electric capacity is connected with the drain electrode of described field effect transistor, the negative pole of described first diode is connected with the second end of described first electric capacity and the positive pole of described second diode respectively, the negative pole of described second diode is connected with the second end of described second electric capacity and the first end of described second resistance respectively, second end of described second resistance respectively with the grid of described field effect transistor, the collector of described triode is connected with the negative electrode of described voltage stabilizing reference source, the source electrode of described field effect transistor is connected with the base stage of described triode and the first end of described 3rd resistance respectively, second end of described 3rd resistance respectively with the emitter of described triode, the first end of described potentiometer, the sliding end of described potentiometer, the first end of described 5th electric capacity is connected with the first voltage output end of described voltage stabilizing adjustable power circuit, second end of described potentiometer respectively with the first end of described 4th electric capacity, the first end of described 4th resistance is connected with the reference pole of described voltage stabilizing reference source, the anode of described voltage stabilizing reference source respectively with the first end of described first resistance, second end of described 4th resistance, second end of described 4th electric capacity, second end of described 5th electric capacity is connected with the second voltage output end of described voltage stabilizing adjustable power circuit, second end of described first resistance is connected with described second end of the 3rd electric capacity and the negative pole of described bridge rectifier respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310606314.1A CN104656865A (en) | 2013-11-25 | 2013-11-25 | Adjustable voltage-stabilized power supply circuit of computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310606314.1A CN104656865A (en) | 2013-11-25 | 2013-11-25 | Adjustable voltage-stabilized power supply circuit of computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104656865A true CN104656865A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310606314.1A Pending CN104656865A (en) | 2013-11-25 | 2013-11-25 | Adjustable voltage-stabilized power supply circuit of computer |
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Cited By (2)
| 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 |
| CN114115416A (en) * | 2021-11-10 | 2022-03-01 | 吕梁学院 | Reference source for precisely adjusting voltage |
-
2013
- 2013-11-25 CN CN201310606314.1A patent/CN104656865A/en active Pending
Cited By (2)
| 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 |
| CN114115416A (en) * | 2021-11-10 | 2022-03-01 | 吕梁学院 | Reference source for precisely adjusting voltage |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |