CN205453529U - Low -power consumption DC power supply circuit - Google Patents

Abstract

The utility model discloses a low -power consumption DC power supply circuit, including rectifier bridge Q, diode D1, transformer T, electric capacity C1, triode VT1 summation potential ware RP1, transformer T coil L1 connects 220V alternating current both ends respectively in both ends, anodal and the rectifier bridge Q pin 1 of diode D1 is connected respectively to transformer T coil L2 one end, the electric capacity C2 and the transformer T coil L2 other end are connected respectively to rectifier bridge Q pin 3, diode D1 negative pole is connected respectively to the electric capacity C2 other end and diode D2 is anodal, diode D2 negative pole is connecting resistance R4 respectively, triode VT2 collecting electrode and electric capacity C3, triode VT2 base and triode VT3 collecting electrode are connected respectively to the resistance R4 other end. The utility model discloses low -power consumption DC power supply circuit can make compensating pipe VT1 consumption reduce, has improved the efficiency of power greatly, and circuit structure is simple, and is with low costs, small.

Description

A kind of low-power consumption DC power supply circuit

Technical field

This utility model relates to a kind of power supply, specifically a kind of low-power consumption DC power supply circuit.

Background technology

Along with popularizing of present electrical equipment, bringing revolutionary change to industrial and agricultural production, Defence business, science and technology, accelerate the development of society, people have stepped into Electrification Age, also the quality of life making people is greatly improved, and the most increasingly be unable to do without these electric equipments.Along with the development of science and technology, the precision of electric equipment also gradually steps up, and there occurs earth-shaking change, but how to protect the most interfered by outside of these electric equipments, has become the subject matter that current development in science and technology is paid close attention to.The electrical network of China is popularized at present, and it is many convenient that huge network system gives us.But the user being as accessing electrical network increases, and the variation of consumer electronics, also result in the instability of line voltage, voltage fluctuated, also become to damage the principal element of electric equipment.

Classical tandem type regulated power supply is disadvantageous in that the driving running voltage adjusting pipe necessarily be greater than output voltage, and it is relatively big that this causes adjusting pipe c, e extreme pressure difference the most naturally, significant component of power is therefore lost, reduces efficiency.

Utility model content

The purpose of this utility model is to provide a kind of low-power consumption DC power supply circuit, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, the following technical scheme of this utility model offer:

nullA kind of low-power consumption DC power supply circuit，Including rectifier bridge Q、Diode D1、Transformator T、Electric capacity C1、Audion VT1 and potentiometer RP1，Described transformator T coil L1 two ends connect 220V alternating current two ends respectively，Transformator T coil L2 one end connects diode D1 positive pole and rectifier bridge Q pin 1 respectively，Rectifier bridge Q pin 3 connects electric capacity C2 and the transformator T coil L2 other end respectively，The electric capacity C2 other end connects diode D1 negative pole and diode D2 positive pole respectively，Diode D2 negative pole connects resistance R4 respectively、Audion VT2 colelctor electrode and electric capacity C3，The resistance R4 other end connecting triode VT2 base stage and audion VT3 colelctor electrode respectively，Audion VT2 emitter stage connecting triode VT1 base stage，Audion VT1 colelctor electrode connects rectifier bridge Q pin 2 and electric capacity C1 respectively，Audion VT1 emitter stage connects resistance R3 respectively、Potentiometer RP1 one end and output end vo，Potentiometer RP1 slide plate connects diode D4 negative pole and audion VT3 base stage respectively，Audion VT3 emitter stage connects the resistance R3 other end and diode D3 negative pole respectively，Diode D3 positive pole connects the potentiometer RP1 other end respectively、Diode D4 positive pole、The electric capacity C1 other end、The electric capacity C3 other end and rectifier bridge Q pin 4.

As this utility model further scheme: described diode D3 and diode D4 is Zener diode.

Compared with prior art, the beneficial effects of the utility model are: this utility model low-power consumption DC power supply circuit can make adjustment pipe VT1 lower power consumption, substantially increases the efficiency of power supply, and circuit structure is simple, and low cost, volume is little.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of low-power consumption DC power supply circuit.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.

nullRefer to Fig. 1，In this utility model embodiment，A kind of low-power consumption DC power supply circuit，Including rectifier bridge Q、Diode D1、Transformator T、Electric capacity C1、Audion VT1 and potentiometer RP1，Described transformator T coil L1 two ends connect 220V alternating current two ends respectively，Transformator T coil L2 one end connects diode D1 positive pole and rectifier bridge Q pin 1 respectively，Rectifier bridge Q pin 3 connects electric capacity C2 and the transformator T coil L2 other end respectively，The electric capacity C2 other end connects diode D1 negative pole and diode D2 positive pole respectively，Diode D2 negative pole connects resistance R4 respectively、Audion VT2 colelctor electrode and electric capacity C3，The resistance R4 other end connecting triode VT2 base stage and audion VT3 colelctor electrode respectively，Audion VT2 emitter stage connecting triode VT1 base stage，Audion VT1 colelctor electrode connects rectifier bridge Q pin 2 and electric capacity C1 respectively，Audion VT1 emitter stage connects resistance R3 respectively、Potentiometer RP1 one end and output end vo，Potentiometer RP1 slide plate connects diode D4 negative pole and audion VT3 base stage respectively，Audion VT3 emitter stage connects the resistance R3 other end and diode D3 negative pole respectively，Diode D3 positive pole connects the potentiometer RP1 other end respectively、Diode D4 positive pole、The electric capacity C1 other end、The electric capacity C3 other end and rectifier bridge Q pin 4；Described diode D3 and diode D4 is Zener diode.

Operation principle of the present utility model is: refer to Fig. 1, the circuit of resistance R3 and diode D3 composition provides reference voltage for audion VT3, existence due to D3, the current potential of D3 negative pole is constant, potentiometer RP1 forms output voltage sampling microwave network, and the potential voltage that sampling obtains compares with D3 negative pole current potential, and result of the comparison is exported by the colelctor electrode of VT3 and makes audion VT2 base potential change, thus control the conducting degree of VT1, reach the purpose of automatic stabilisation output voltage.When output end vo is unloaded or external loading resistance is bigger, output voltage drop tends to rising, the VT3 base level now obtained by sampling microwave network raises, and VT3 collector current strengthens, and VT2 base current reduces, VT2 conducting degree weakens, the electric current flowing to VT1 base stage reduces, and VT1 conducting degree weakens, and the electric current of output end vo reduces, current path, thus realize voltage stabilizing.

Transformator T coil L2 and D1, D2, C2, C3 constitutes voltage doubling rectifing circuit, at the positive half cycle of alternating current 220V, electric capacity C2 is charged by power supply, at alternating current 220V negative half period, 220V AC supply voltage and electric capacity C2 voltage are charged to C3 by D2 after being added, so C3 can obtain twice supply voltage, this twice supply voltage is supplied to VT1, and then lead to the base stage adjusting pipe VT1, the base stage of VT1 and transmitting interpolar voltage difference just can be the least, between its collector and emitter, voltage difference the most just can be reduced to close to saturation voltage drop, so that adjusting pipe VT1 lower power consumption, thus substantially increase the efficiency of power supply；Zener diode D4 can improve the stability of sampling by the base potential clamper of audion VT3 to fixing safety value.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in this utility model.Should not be considered as limiting involved claim by any reference in claim.

In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.

Claims (2)

1. null1. a low-power consumption DC power supply circuit，Including rectifier bridge Q、Diode D1、Transformator T、Electric capacity C1、Audion VT1 and potentiometer RP1，It is characterized in that，Described transformator T coil L1 two ends connect 220V alternating current two ends respectively，Transformator T coil L2 one end connects diode D1 positive pole and rectifier bridge Q pin respectively，Rectifier bridge Q pin 3 connects electric capacity C2 and the transformator T coil L2 other end respectively，The electric capacity C2 other end connects diode D1 negative pole and diode D2 positive pole respectively，Diode D2 negative pole connects resistance R4 respectively、Audion VT2 colelctor electrode and electric capacity C3，The resistance R4 other end connecting triode VT2 base stage and audion VT3 colelctor electrode respectively，Audion VT2 emitter stage connecting triode VT1 base stage，Audion VT1 colelctor electrode connects rectifier bridge Q pin 2 and electric capacity C1 respectively，Audion VT1 emitter stage connects resistance R3 respectively、Potentiometer RP1 one end and output end vo，Potentiometer RP1 slide plate connects diode D4 negative pole and audion VT3 base stage respectively，Audion VT3 emitter stage connects the resistance R3 other end and diode D3 negative pole respectively，Diode D3 positive pole connects the potentiometer RP1 other end respectively、Diode D4 positive pole、The electric capacity C1 other end、The electric capacity C3 other end and rectifier bridge Q pin 4.
2. Low-power consumption DC power supply circuit the most according to claim 1, it is characterised in that described diode D3 and diode D4 is Zener diode.