CN204993098U - Computer adapter power - Google Patents

Abstract

The utility model discloses a computer adapter power, including fuse FU, resistance R1, electric capacity C1, diode D1, triode V1, transformer T and resistance R2, the anodal 220V alternating current one end of connecting of diode D1, fuse FU is connected to the 220V alternating current other end, electric capacity C1 is connected respectively to the fuse FU other end, electric capacity C3, triode V2 projecting pole, resistance R4 and transformer T coil L2, diode D1 negative pole is connected respectively to the electric capacity C1 other end, resistance R1, electric capacity C2, resistance R2 and transformer T coil L1, anodal and the triode V1 collecting electrode of diode D2 is connected respectively to the transformer T coil L1 other end, diode D2 negative pole is the connecting resistance R2 other end and the electric capacity C2 other end respectively. The utility model discloses computer adapter power does not adopt the design of any chip element, and circuit structure is simple, and is with low costs, small, and the interference killing feature is strong, and the steady voltage is effectual, especially adapted using widely.

Description

A kind of computer adaptor power supplies

Technical field

The utility model relates to a kind of power supply, specifically a kind of computer adaptor power supplies.

Background technology

Along with the development of electronic technology, the life of people and too busy to get away computer, and computer is as a kind of sophisticated electronics, its in-line power is even more important safely, on the basis of miniaturization, how to make power supply keep safety and stability, be the research emphasis of each large computer vendors.

Utility model content

The purpose of this utility model is to provide a kind of computer adaptor power supplies, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technical scheme:

A kind of computer adaptor power supplies, comprise fuse FU, resistance R1, electric capacity C1, diode D1, triode V1, transformer T and resistance R2, described diode D1 positive pole connects 220V alternating current one end, the 220V alternating current other end connects fuse FU, the fuse FU other end connects electric capacity C1 respectively, electric capacity C3, triode V2 emitter, resistance R4 and transformer T coil L2, the electric capacity C1 other end connects diode D1 negative pole respectively, resistance R1, electric capacity C2, resistance R2 and transformer T coil L1, the transformer T coil L1 other end connects diode D2 positive pole and triode V1 collector electrode respectively, diode D2 negative pole is the contact resistance R2 other end and the electric capacity C2 other end respectively, triode V1 base stage is the contact resistance R1 other end respectively, triode V2 collector electrode, resistance R3 and diode D3 negative pole, diode D3 positive pole connects diode D4 positive pole and the electric capacity C3 other end respectively, diode D4 negative pole connects electric capacity C4 and the transformer T coil L2 other end respectively, the electric capacity C4 other end contact resistance R3 other end, triode V2 base stage connects diode D2 negative pole, diode D2 positive pole is connecting triode V1 emitter and the resistance R4 other end respectively, described transformer T coil L3 one end connects diode D6 positive pole, diode D6 negative pole connects electric capacity C5 respectively, resistance R5 and output end vo, the resistance R5 other end connects diode D7 positive pole, diode D7 negative pole connects the electric capacity C5 other end and the transformer T coil L3 other end and ground connection respectively.

As the utility model further scheme: described diode D7 is light-emitting diode.

Compared with prior art, the beneficial effects of the utility model are: the utility model computer adaptor power supplies does not adopt any chip component to design, and circuit structure is simple, and cost is low, and volume is little, and antijamming capability is strong, and voltage regulation result is good, is applicable to very much promoting the use of.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of computer adaptor power supplies.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, in the utility model embodiment, a kind of computer adaptor power supplies, comprise fuse FU, resistance R1, electric capacity C1, diode D1, triode V1, transformer T and resistance R2, diode D1 positive pole connects 220V alternating current one end, the 220V alternating current other end connects fuse FU, the fuse FU other end connects electric capacity C1 respectively, electric capacity C3, triode V2 emitter, resistance R4 and transformer T coil L2, the electric capacity C1 other end connects diode D1 negative pole respectively, resistance R1, electric capacity C2, resistance R2 and transformer T coil L1, the transformer T coil L1 other end connects diode D2 positive pole and triode V1 collector electrode respectively, diode D2 negative pole is the contact resistance R2 other end and the electric capacity C2 other end respectively, triode V1 base stage is the contact resistance R1 other end respectively, triode V2 collector electrode, resistance R3 and diode D3 negative pole, diode D3 positive pole connects diode D4 positive pole and the electric capacity C3 other end respectively, diode D4 negative pole connects electric capacity C4 and the transformer T coil L2 other end respectively, the electric capacity C4 other end contact resistance R3 other end, triode V2 base stage connects diode D2 negative pole, diode D2 positive pole is connecting triode V1 emitter and the resistance R4 other end respectively, described transformer T coil L3 one end connects diode D6 positive pole, diode D6 negative pole connects electric capacity C5 respectively, resistance R5 and output end vo, the resistance R5 other end connects diode D7 positive pole, diode D7 negative pole connects the electric capacity C5 other end and the transformer T coil L3 other end and ground connection respectively.

Diode D7 is light-emitting diode.

Operation principle of the present utility model is: refer to Fig. 1, the direct voltage that 220V alternating current obtains about 300V after D1 rectification and C1 filtering is added on transformer T coil L1, simultaneously this voltage to add after after upper offset to V1 through R1 and makes its slight conducting, electric current is had to flow through transformer T coil L1, on transformer T coil L2, form positive voltage simultaneously, this voltage is through C4, R3 feeds back to V1, make its conducting Du Genggao, and even it is saturated, finally with the reduction of feedback current, V1 exits rapidly saturated and ends, circulation like this forms vibration, transformer T coil L3 induces required output voltage, transformer T coil L2 is feedback coil, simultaneously also with D4, D3, C3 forms voltage stabilizing circuit together, after the voltage of transformer T coil L3 after D6 rectification on C5 raises, also show as the voltage of transformer T coil L2 after D4 rectification on C3 negative pole lower simultaneously, be about voltage-stabiliser tube D3(9V when being low to moderate) voltage stabilizing value time D3 conducting, V1 is made to have base stage to be shorted to ground, turn off V1, output end vo voltage is finally made to reduce, R4 in circuit, D5, V2 forms current foldback circuit.When some reason cause the operating current of V1 large too time, the voltage of the upper generation of R4 adds to V2 base stage through D5, V2 conducting, and V1 base voltage declines, V1 electric current is reduced, the voltage stabilizing value theory of D3 is 9V+0.5 ~ 0.7V, when practical application, to change output voltage, as long as change the D3 of different voltage stabilizing value, voltage stabilizing value is less, and output voltage is lower, otherwise then higher.

To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.

In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.

Claims (2)

1. a computer adaptor power supplies, comprise fuse FU, resistance R1, electric capacity C1, diode D1, triode V1, transformer T and resistance R2, it is characterized in that, described diode D1 positive pole connects 220V alternating current one end, the 220V alternating current other end connects fuse FU, the fuse FU other end connects electric capacity C1 respectively, electric capacity C3, triode V2 emitter, resistance R4 and transformer T coil L2, the electric capacity C1 other end connects diode D1 negative pole respectively, resistance R1, electric capacity C2, resistance R2 and transformer T coil L1, the transformer T coil L1 other end connects diode D2 positive pole and triode V1 collector electrode respectively, diode D2 negative pole is the contact resistance R2 other end and the electric capacity C2 other end respectively, triode V1 base stage is the contact resistance R1 other end respectively, triode V2 collector electrode, resistance R3 and diode D3 negative pole, diode D3 positive pole connects diode D4 positive pole and the electric capacity C3 other end respectively, diode D4 negative pole connects electric capacity C4 and the transformer T coil L2 other end respectively, the electric capacity C4 other end contact resistance R3 other end, triode V2 base stage connects diode D2 negative pole, diode D2 positive pole is connecting triode V1 emitter and the resistance R4 other end respectively, described transformer T coil L3 one end connects diode D6 positive pole, diode D6 negative pole connects electric capacity C5 respectively, resistance R5 and output end vo, the resistance R5 other end connects diode D7 positive pole, diode D7 negative pole connects the electric capacity C5 other end and the transformer T coil L3 other end and ground connection respectively.

2. computer adaptor power supplies according to claim 1, is characterized in that, described diode D7 is light-emitting diode.