CN203573241U - Voltage-stabilizing adjustable power circuit of computer - Google Patents
Voltage-stabilizing adjustable power circuit of computer Download PDFInfo
- Publication number
- CN203573241U CN203573241U CN201320754384.7U CN201320754384U CN203573241U CN 203573241 U CN203573241 U CN 203573241U CN 201320754384 U CN201320754384 U CN 201320754384U CN 203573241 U CN203573241 U CN 203573241U
- Authority
- CN
- China
- Prior art keywords
- voltage
- electric capacity
- resistance
- diode
- voltage stabilizing
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses a voltage-stabilizing adjustable power circuit of a computer. The voltage-stabilizing adjustable power circuit comprises an alternating current power supply, a transformer, a bridge rectifier, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a field effect tube, a triode, a voltage-stabilizing reference source and a potentiometer, wherein when the output voltage is reduced, the potential of a reference electrode of the voltage-stabilizing reference source is reduced, the voltage of a cathode is increased, after adjustment of the field effect tube, the potential of the emitter of the triode is increased, otherwise, when the output voltage is increased, the potential of the reference electrode of the voltage-stabilizing reference source is increased, the voltage of the cathode is reduced, after adjustment of the field effect tube, the potential of the emitter of the triode is reduced, so that the output voltage is stabilized, when the output current is greater than a set value, the triode is stopped so as to limit the current. According to the voltage-stabilizing adjustable power circuit, through adjustment of the voltage-stabilizing reference source and the field effect tube, the output voltage is stabilized, the output current is limited in the set value, the computer is guaranteed to work under the condition of stable voltage, and the service life is prolonged.
Description
Technical field
The utility model relates to a kind of power circuit for computer, relates in particular 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, generally in positive and negative 12 volts, and be direct current, and common civil power is 220 volts of alternating currents, can not directly on machine element, use, 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 is worked for a long time and will be caused performance to reduce the in the situation that of spread of voltage, and shorten serviceable life.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of voltage stabilizing adjustable power circuit of computing machine.
The utility model 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, the first electric capacity to the five electric capacity, the first diode, the second diode, the first resistance to the four 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, the 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 the first electric capacity and the first voltage end of described bridge rectifier respectively, the 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 the 3rd electric capacity, the positive pole of described the first diode, the first end of described the second electric capacity is connected with the drain electrode of described field effect transistor, the negative pole of described the first diode is connected with the second end of described the first electric capacity and the positive pole of described the second diode respectively, the negative pole of described the second diode is connected with the second end of described the second electric capacity and the first end of described the second resistance respectively, the second end of described the 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 the 3rd resistance respectively, the second end of described the 3rd resistance respectively with the emitter of described triode, the first end of described potentiometer, the sliding end of described potentiometer, the first voltage output end of the first end of described the 5th electric capacity and described voltage stabilizing adjustable power circuit is connected, the second end of described potentiometer respectively with the first end of described the 4th electric capacity, the reference utmost point of the first end of described the 4th resistance and described voltage stabilizing reference source is connected, the anode of described voltage stabilizing reference source respectively with the first end of described the first resistance, the second end of described the 4th resistance, the second end of described the 4th electric capacity, the second end of described the 5th electric capacity is connected with the second voltage output terminal of described voltage stabilizing adjustable power circuit, the second end of described the first resistance is connected with the second end of described the 3rd electric capacity and the negative pole of described bridge rectifier respectively.
The beneficial effects of the utility model are:
The utility model is a kind of voltage stabilizing adjustable power circuit of computing machine, adjusting by voltage stabilizing reference source and field effect transistor makes output voltage stabilization, and output current is limited in setting value, guaranteed 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 utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the voltage stabilizing adjustable power circuit of a kind of computing machine of the utility model, comprise AC power AC, transformer T, bridge rectifier BR, the first capacitor C 1 is to the 5th capacitor C 5, the first diode D1, the second diode D2, the first resistance R 1 is to the 4th resistance R 4, 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, the 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 capacitor C 1 and the first voltage end of bridge rectifier BR respectively, the second end of the secondary coil of transformer T is connected with the second voltage end of bridge rectifier BR, the positive pole of bridge rectifier BR respectively with the first end of the 3rd capacitor C 3, the positive pole of the first diode D1, the first end of the second capacitor C 2 is connected with the drain electrode of field effect transistor FET, the negative pole of the first diode D1 is connected with the second end of the first capacitor C 1 and the positive pole of the second diode D2 respectively, the negative pole of the second diode D2 is connected with the second end of the second capacitor C 2 and the first end of the second resistance R 2 respectively, the second end of the second resistance R 2 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 R 3 respectively, the second end of the 3rd resistance R 3 respectively with the emitter of triode VT, the first end of potentiometer RP, the sliding end of potentiometer RP, the first voltage output end VO1 of the first end of the 5th capacitor C 5 and voltage stabilizing adjustable power circuit is connected, the second end of potentiometer RP respectively with the first end of the 4th capacitor C 4, the first end of the 4th resistance R 4 is connected with the reference utmost point of voltage stabilizing reference source Q, the anode of voltage stabilizing reference source Q respectively with the first end of the first resistance R 1, the second end of the 4th resistance R 4, the second end of the 4th capacitor C 4, the second voltage output terminal VO2 of the second end of the 5th capacitor C 5 and voltage stabilizing adjustable power circuit is connected, the second end of the first resistance R 1 is connected with the second end of the 3rd capacitor C 3 and the negative pole of bridge rectifier BR respectively.
Alternating voltage is through transformer T step-down, bridge rectifier BR rectification, the 3rd capacitor C 3 filtering; in addition; the first capacitor C 1, the second capacitor C 2, the first diode D1, the second diode D2 composition voltage-multiplying circuit; potentiometer RP and the 4th resistance R 4 form bleeder circuit; the second resistance R 2 and voltage stabilizing reference source Q composition sampling amplification circuit; the 3rd resistance R 3 and triode VT composition current-limiting protection circuit, field effect transistor FET adjusts pipe, and the 5th capacitor C 5 is carried out filtering to output voltage.Voltage stabilizing process is: when output voltage reduces, the reference electrode potential of voltage stabilizing reference source Q reduces, and through inner amplification of voltage stabilizing reference source Q, the cathode voltage of voltage stabilizing reference source Q is increased, after field effect transistor FET adjusts, and triode VT emitter potential rise; Otherwise when output voltage increases, the reference electrode potential of voltage stabilizing reference source Q raises, the cathode voltage of voltage stabilizing reference source Q reduces, and after field effect transistor FET adjusts, triode VT emitter current potential reduces, thereby makes output voltage stabilization.When output current is greater than setting value, triode VT cut-off, is limited in setting value output current, thereby 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, the first electric capacity to the five electric capacity, the first diode, the second diode, the first resistance to the four 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, the 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 the first electric capacity and the first voltage end of described bridge rectifier respectively, the 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 the 3rd electric capacity, the positive pole of described the first diode, the first end of described the second electric capacity is connected with the drain electrode of described field effect transistor, the negative pole of described the first diode is connected with the second end of described the first electric capacity and the positive pole of described the second diode respectively, the negative pole of described the second diode is connected with the second end of described the second electric capacity and the first end of described the second resistance respectively, the second end of described the 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 the 3rd resistance respectively, the second end of described the 3rd resistance respectively with the emitter of described triode, the first end of described potentiometer, the sliding end of described potentiometer, the first voltage output end of the first end of described the 5th electric capacity and described voltage stabilizing adjustable power circuit is connected, the second end of described potentiometer respectively with the first end of described the 4th electric capacity, the reference utmost point of the first end of described the 4th resistance and described voltage stabilizing reference source is connected, the anode of described voltage stabilizing reference source respectively with the first end of described the first resistance, the second end of described the 4th resistance, the second end of described the 4th electric capacity, the second end of described the 5th electric capacity is connected with the second voltage output terminal of described voltage stabilizing adjustable power circuit, the second end of described the first resistance is connected with the second end of described the 3rd electric capacity and the negative pole of described bridge rectifier respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320754384.7U CN203573241U (en) | 2013-11-25 | 2013-11-25 | Voltage-stabilizing adjustable power circuit of computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320754384.7U CN203573241U (en) | 2013-11-25 | 2013-11-25 | Voltage-stabilizing adjustable power circuit of computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573241U true CN203573241U (en) | 2014-04-30 |
Family
ID=50540965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320754384.7U Expired - Fee Related CN203573241U (en) | 2013-11-25 | 2013-11-25 | Voltage-stabilizing adjustable power circuit of computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203573241U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320008A (en) * | 2014-11-07 | 2015-01-28 | 成都爱斯顿测控技术有限公司 | Adjustable direct current stabilized power supply circuit |
-
2013
- 2013-11-25 CN CN201320754384.7U patent/CN203573241U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320008A (en) * | 2014-11-07 | 2015-01-28 | 成都爱斯顿测控技术有限公司 | Adjustable direct current stabilized power supply circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103280765A (en) | Overvoltage protection circuit | |
| CN105099201A (en) | Micro-power consumption single-ended flyback high-voltage power supply circuit | |
| CN203573241U (en) | Voltage-stabilizing adjustable power circuit of computer | |
| CN104656865A (en) | Adjustable voltage-stabilized power supply circuit of computer | |
| CN203225668U (en) | Circuit for converting sinusoidal alternating current electric signal into sawtooth wave electric signal | |
| CN105429488A (en) | Magnetic amplifier based switch power supply self-feedback circuit and control method therefor | |
| CN202797873U (en) | Light-emitting diode (LED) short-circuit protection circuit | |
| CN205051415U (en) | Lithium battery charging circuit | |
| CN203562754U (en) | Over-voltage and under-voltage protective circuit based on three-end adjustable shunt reference source | |
| CN202737766U (en) | Large power adjustable direct current voltage stabilization power supply | |
| CN204349851U (en) | Control of Fan Motor system | |
| CN203301390U (en) | Direct-current power voltage regulator circuit | |
| CN203551960U (en) | Power supply timer of router | |
| CN104570816A (en) | Simple time delay power supply switching circuit | |
| CN204030562U (en) | A kind of under-voltage protecting circuit of Switching Power Supply | |
| CN204442190U (en) | A kind of doubleway output step-down controller circuit | |
| CN204681147U (en) | A kind of constant-current charging circuit of adjustable current | |
| CN203942666U (en) | A kind of field-effect transistor step-down LED drive circuit with power correction | |
| CN203573116U (en) | Highly-stable power supply control circuit of electronic communication device | |
| CN203233311U (en) | Circuit of stabilized voltage supply | |
| CN210807225U (en) | Switch control circuit | |
| CN203896208U (en) | High-efficiency control circuit for power adapter | |
| CN203589701U (en) | Over-high temperature automatic power-off controller for motor of textile machine | |
| CN205142037U (en) | Household power consumption safety protection automatic control circuit | |
| CN105375600A (en) | Lithium battery charging circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20141125 |
|
| EXPY | Termination of patent right or utility model |