CN203339975U

CN203339975U - Direct-current stabilized power supply with protection function

Info

Publication number: CN203339975U
Application number: CN2013204147129U
Authority: CN
Inventors: 孟彦京; 张焱
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2013-12-11
Anticipated expiration: 2023-07-12

Abstract

The utility model discloses a direct-current stabilized power supply with a protection function. The direct-current stabilized power supply comprises a transformer module, wherein one end of the transformer module is connected with a power grid; the other end of the transformer module is sequentially connected with an uncontrolled rectifier circuit module, a filter circuit module and a voltage-stabilizing circuit module, the voltage-stabilizing circuit module is used for outputting a direct-current stabilized voltage, and a protection circuit module is further arranged on the voltage-stabilizing circuit module in parallel; and the protection circuit module is a diode, and the both ends of the diode are arranged at the input end and the output end of the voltage-stabilizing circuit module respectively. According to the direct-current stabilized power supply disclosed by the utility model, the problems of easy burnout, unstable power supply and complex design of the existing direct-current power supply voltage stabilizer on the market are effectively solved.

Description

A kind of D.C. regulated power supply with defencive function

Technical field

The utility model relates to technical field of electronic equipment, relates to a kind of D.C. regulated power supply with defencive function.

Background technology

Electric equipment brings great convenience to people, but any electric equipment all needs to have a common circuit-power circuit.Equipment itself requires power supply can provide continually and steadily, meet the electric energy of load request.

But, from present stage, because the aging of China's electric power transmission & distribution facility and development lag behind, and a series of reasons such as Design and optimization measure imperfection all easily make user's terminal voltage too low, and the higher phenomenon of end of incoming cables voltage.Unsettled voltage can cause mortal injury to equipment, and impact is produced, and causes construction delay, and product is defective waits many-sided loss.

Simultaneously, the aging of electromechanical equipment easily accelerated in the sudden change of voltage, reduces useful life, when serious, may burn machine.This makes the user need to spend extra energy aspect maintenance, lowers efficiency, and has wasted resource, has caused the cost rising.Security incident also likely occurs aborning, to enterprise, causes serious loss.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of D.C. regulated power supply with defencive function, solves that existing Power supply is unstable on the market at present, and pressurizer easily burns and the problem of indoor design complexity.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of D.C. regulated power supply with defencive function comprises:

One transformer module, described transformer module one end connects electrical network, and the transformer module other end connects not control rectifying circuit module, filter circuit module and a voltage stabilizing circuit module in turn, and described voltage stabilizing circuit module is exported a stable DC voltage,

Also be set up in parallel a protective circuit module on described voltage stabilizing circuit module.

In a preferred embodiment of the present utility model, described protective circuit module is a diode, and the diode two ends are arranged at respectively input and the output of voltage stabilizing circuit module.

In a preferred embodiment of the present utility model, described voltage stabilizing circuit module is a LM317 type integrated regulator.

In a preferred embodiment of the present utility model, described transformer module also arranges an integrated regulator.

By technique scheme, the beneficial effects of the utility model are:

The high pressure that the utility model has produced while having prevented capacitor discharge in the circuit is added in the two ends of pressurizer, avoids pressurizer to be burnt; Simultaneously, can effectively suppress the drift of voltage when operating ambient temperature changes, effectively suppress ripple, keep stable output.

When loading on while changing among a small circle, output voltage remains unchanged substantially, reaches the voltage stabilizing purpose.

The accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is fundamental diagram of the present utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

With reference to Fig. 1, a kind of D.C. regulated power supply with defencive function comprises:

One transformer module 1, described transformer module 1 input connects electrical network, and transformer module 1 output connection one is the input of control rectifying circuit module 2 not,

One filter circuit module 3, described filter circuit module 3 inputs connect the not output of control rectifying circuit module 2, and filter circuit module 3 outputs connect the input of voltage stabilizing circuit module 4, and the output of described voltage stabilizing circuit module 4 connects power consumption equipment,

Also be set up in parallel a protective circuit module 5 on described voltage stabilizing circuit module 4.Wherein, the protective circuit module is a diode, and the diode two ends are arranged at respectively input and the output of voltage stabilizing circuit module.

Described voltage stabilizing circuit module is a LM317 type integrated regulator.Described transformer module also arranges an integrated regulator.

Operation principle of the present utility model:

Transformer module 1 becomes the required 12V low-voltage AC of voltage stabilizing to the 220V alternating current of taking from electrical network; Control rectifying circuit module 2 is not utilized the rectification characteristic of not controlling of diode, and the low-voltage AC after step-down is become to direct current; And now rectification and the direct current that comes belongs to pulsating wherein contains alternating component, so need the alternating component filterings that circuit module 3 after filtering will be wherein, become smoother DC quantity;

Direct voltage after link still has a little fluctuation after filtering, and this sophisticated electronics to ask for something high-quality supply power voltage is unallowed.Now, just need to pass through a voltage stabilizing circuit module 4, core component is exactly LM317 type integrated regulator wherein again; If this pressurizer uses separately, likely because in the filter circuit of front, the electric discharge of electric capacity causes forming overvoltage on pressurizer.This will make LM317 burn out.

So also need, at diode of voltage stabilizing circuit module two ends inverse parallel as protective circuit, so just can guarantee the circuit steady operation.Thus, the voltage of exporting by Voltage stabilizing module is exactly a stable voltage, works as environmental change, and while loading on interior fluctuation among a small circle, stabilized voltage power supply can keep the constant of output voltage, reaches actual requirement.

Above demonstration and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. the D.C. regulated power supply with defencive function, is characterized in that, comprising:

2. a kind of D.C. regulated power supply with defencive function according to claim 1, it is characterized in that: described protective circuit module is a diode, the diode two ends are arranged at respectively input and the output of voltage stabilizing circuit module.

3. a kind of D.C. regulated power supply with defencive function according to claim 1, it is characterized in that: described voltage stabilizing circuit module is a LM317 type integrated regulator.

4. a kind of D.C. regulated power supply with defencive function according to claim 1, it is characterized in that: described transformer module also arranges an integrated regulator.