CN217135392U - AC to DC voltage-stabilizing output switching power supply - Google Patents
AC to DC voltage-stabilizing output switching power supply Download PDFInfo
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- CN217135392U CN217135392U CN202123035722.5U CN202123035722U CN217135392U CN 217135392 U CN217135392 U CN 217135392U CN 202123035722 U CN202123035722 U CN 202123035722U CN 217135392 U CN217135392 U CN 217135392U
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Abstract
The utility model discloses a AC is to DC steady voltage output switching power supply relates to the power field, and this AC is to DC steady voltage output switching power supply includes: the commercial power supply is used for supplying 220V alternating current; the voltage reduction rectification module is used for converting 220V alternating current into direct current; the first filtering module is used for filtering direct current for the first time; the second filtering module is used for filtering the filtered direct current again; the voltage output module is used for supplying voltage to a load to work; the feedback voltage stabilizing module is used for feeding back a voltage signal to the voltage output module according to the voltage output by the voltage output module and adjusting the voltage output by the voltage output module; compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a twice filtering guarantees the steady of circuit current through the triode filtering effect of amplifying, guarantees through the feedback to output voltage that output voltage can come real-time regulation output voltage according to output voltage's size, guarantees output voltage's stability.
Description
Technical Field
The utility model relates to a power field specifically is an AC to DC steady voltage output switching power supply.
Background
A switching power supply, also called an exchange power supply or a switching converter, is a high-frequency power conversion device, and is a kind of power supply. The function is to convert a level voltage into a voltage or current required by the user terminal through different types of architectures. The input of the switching power supply is mostly an ac power supply (e.g., commercial power) or a dc power supply, and the output is mostly equipment requiring a dc power supply, such as a personal computer, and the switching power supply performs voltage and current conversion between the two.
The switching power supply in the current market often forms output voltage through a voltage stabilizer, and the output voltage is difficult to guarantee when the voltage stabilizer fails due to the lack of feedback voltage, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an AC to DC steady voltage output switching power supply to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an AC to DC regulated output switching power supply comprising:
the commercial power supply is used for supplying 220V alternating current;
the voltage reduction rectification module is used for converting 220V alternating current into direct current;
the first filtering module is used for filtering direct current for the first time;
the second filtering module is used for filtering the filtered direct current again;
the voltage output module is used for supplying voltage to a load to work;
the feedback voltage stabilizing module is used for feeding back a voltage signal to the voltage output module according to the voltage output by the voltage output module and adjusting the voltage output by the voltage output module;
the voltage reduction rectifier module is connected with the first filter module, the first filter module is connected with the second filter module, the second filter module is connected with the voltage output module, and the voltage output module is connected with the feedback voltage stabilization module in a two-way mode.
As a further aspect of the present invention: the first filtering module comprises a capacitor C1, a capacitor C2, an inductor L1, a triode V1 and a switch S1, one end of the capacitor C1 is connected with the step-down rectifying module, the inductor L1 and the switch S1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected with the base electrodes of the capacitor C2 and the triode V1, the other end of the capacitor C2 is grounded, the other end of the switch S1 is connected with the collector electrode of the triode V1, and the emitter electrode of the triode V1 is connected with the second filtering module.
As a further aspect of the present invention: the second filtering module comprises a capacitor C3, an inductor L2, a resistor R1, a triode V2 and a capacitor C4, one end of the capacitor C3 is connected with the inductor L2 and the first filtering module, the other end of the capacitor C3 is grounded, the other end of the inductor L2 is connected with a resistor R1 and a base electrode of the triode V2, the other end of the resistor R1 is grounded, a collector electrode of the triode V2 is connected with the other end of the switch S1, an emitter electrode of the triode V2 is connected with the capacitor C4 and the voltage output module, and the other end of the capacitor C4 is grounded.
As a further aspect of the present invention: the voltage output module comprises a resistor R2, a diode D1, a resistor R3, a triode V3 and a triode V4, one end of the resistor R2 is connected with the second filtering module, the other end of the resistor R2 is connected with the anode of the diode D1, the collector of the triode V3 and the collector of the triode V4, the cathode of the diode D1 is connected with a resistor R3, the other end of the resistor R3 is connected with the base of the triode V3, the emitter of the triode V3 is connected with the base of the triode V4, and the emitter of the triode V4 is connected with the feedback voltage stabilizing module.
As a further aspect of the present invention: the feedback voltage stabilizing module comprises a triode V5, a diode D2, a resistor R4, a resistor R5, a potentiometer R6, a resistor R7, a capacitor C5 and a voltmeter Y, one end of the resistor R4 is connected with the resistor R5, the capacitor C5, the voltmeter Y and a voltage output module, the other end of the capacitor C5 is grounded, the other end of the voltmeter Y is grounded, the other end of the resistor R4 is connected with the negative electrode of the diode D2 and the emitter of the triode V5, the positive electrode of the diode D2 is grounded, the other end of the resistor R5 is connected with the potentiometer R6, the other end of the potentiometer R6 is connected with the resistor R7, the other end of the resistor R7 is grounded, the sliding end of the potentiometer R6 is connected with the base of the triode V5, and the collector of the triode V5 is connected with the voltage output module.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a twice filtering guarantees the steady of circuit current through the triode filtering effect of amplifying, guarantees through the feedback to output voltage that output voltage can come real-time regulation output voltage according to output voltage's size, guarantees output voltage's stability.
Drawings
Fig. 1 is a schematic diagram of an AC to DC regulated output switching power supply.
Fig. 2 is a circuit diagram of an AC to DC regulated output switching power supply.
Fig. 3 is a graph of the current-voltage characteristic of the zener diode.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, an AC to DC regulated output switching power supply includes:
the commercial power supply is used for supplying 220V alternating current;
the voltage reduction rectification module is used for converting 220V alternating current into direct current;
the first filtering module is used for filtering direct current for the first time;
the second filtering module is used for filtering the filtered direct current again;
the voltage output module is used for supplying voltage to a load to work;
the feedback voltage stabilizing module is used for feeding back a voltage signal to the voltage output module according to the voltage output by the voltage output module and adjusting the voltage output by the voltage output module;
the voltage reduction rectifier module is connected with the first filter module, the first filter module is connected with the second filter module, the second filter module is connected with the voltage output module, and the voltage output module is connected with the feedback voltage stabilization module in a two-way mode.
In this embodiment: referring to fig. 2, the first filtering module includes a capacitor C1, a capacitor C2, an inductor L1, a transistor V1, and a switch S1, one end of the capacitor C1 is connected to the buck rectifier module, the inductor L1, and the switch S1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected to the capacitor C2 and the base of the transistor V1, the other end of the capacitor C2 is grounded, the other end of the switch S1 is connected to the collector of the transistor V1, and the emitter of the transistor V1 is connected to the second filtering module.
The capacitor C1, the capacitor C2 and the inductor L1 form a filter circuit, the direct current input by the voltage reduction rectification module is filtered, and the filtering effect is amplified through the triode V1.
In this embodiment: referring to fig. 2, the second filtering module includes a capacitor C3, an inductor L2, a resistor R1, a transistor V2, and a capacitor C4, one end of the capacitor C3 is connected to the inductor L2 and the first filtering module, the other end of the capacitor C3 is grounded, the other end of the inductor L2 is connected to the resistor R1 and the base of the transistor V2, the other end of the resistor R1 is grounded, the collector of the transistor V2 is connected to the other end of the switch S1, the emitter of the transistor V2 is connected to the capacitor C4 and the voltage output module, and the other end of the capacitor C4 is grounded.
The capacitor C3, the inductor L2 and the resistor R1 form a filter circuit, and the filter circuit is used for filtering the direct current filtered by the first filter module again. The output direct current filtering effect is ensured to be good. And the stable direct current voltage is output through the triode amplification filtering effect.
In this embodiment: referring to fig. 2, the voltage output module includes a resistor R2, a diode D1, a resistor R3, a transistor V3, and a transistor V4, one end of the resistor R2 is connected to the second filtering module, the other end of the resistor R2 is connected to the anode of the diode D1, the collector of the transistor V3, and the collector of the transistor V4, the cathode of the diode D1 is connected to the resistor R3, the other end of the resistor R3 is connected to the base of the transistor V3, the emitter of the transistor V3 is connected to the base of the transistor V4, and the emitter of the transistor V4 is connected to the feedback voltage regulator module.
The direct current output by the second filtering module passes through the resistor R2, the diode D1 and the resistor R3 to turn on the transistor V3, so that the transistor V4 is turned on, and the output direct current voltage is supplied to the load.
In this embodiment: referring to fig. 2 and 3, the feedback voltage stabilizing module includes a transistor V5, a diode D2, a resistor R4, a resistor R5, a potentiometer R6, a resistor R7, a capacitor C5, and a voltmeter Y, wherein one end of the resistor R4 is connected to the resistor R5, the capacitor C5, the voltmeter Y, and the voltage output module, the other end of the capacitor C5 is grounded, the other end of the voltmeter Y is grounded, the other end of the resistor R4 is connected to a negative electrode of the diode D2 and an emitter of the transistor V5, an anode of the diode D2 is grounded, the other end of the resistor R5 is connected to the potentiometer R6, the other end of the potentiometer R6 is connected to the resistor R7, the other end of the resistor R7 is grounded, a sliding end of the potentiometer R6 is connected to a base of the transistor V5, and a collector of the transistor V5 is connected to the voltage output module.
The voltage on the voltage stabilizing diode is constant before the breakover voltage is reached. The direct current voltage output by the voltage output module is the sum of the voltages of the resistor R5, the potentiometer R6 and the resistor R7, and the sum of the voltages of the lower ends of the sliding ends of the resistor R7 and the potentiometer R6 is the base voltage of the triode V5, so that when the output voltage of the triode V4 is increased, the base voltage of the triode V5 is increased, the emitter voltage of the triode V5 is increased, but the diode D2 is a zener diode, so that the emitter voltage of the triode V5 cannot be changed, the base voltage of the triode V3 is reduced, and the output voltage of the triode V4 is reduced; when the output voltage of the transistor V4 is reduced, the output voltage of the transistor V4 is increased through feedback voltage information; thereby achieving the effect of voltage stabilization. The base voltage of the triode V5 is changed by adjusting the resistance value of the potentiometer R6, and the collector voltage of the triode V5 is further changed, so that the base voltage of the triode V3 is changed, the direct-current voltage output by the voltage output module is changed, and the voltage regulating effect is achieved. And obtaining a specific numerical value of the output voltage through a voltmeter Y.
The utility model discloses a theory of operation is: the mains supply supplies 220V alternating current, unstable low-voltage direct current is output through the voltage reduction rectification module, stable low-voltage direct current is obtained through filtering of the first filtering module and the second filtering module and is output to the voltage output module, voltage is supplied to a load through the voltage output module to work, the voltage feedback and stabilization module feeds back a voltage signal to the voltage output module according to the voltage output by the voltage output module, the output voltage of the voltage output module is adjusted, and stability is guaranteed; and the voltage output by the voltage output module can be adjusted by adjusting the feedback voltage stabilizing module.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An AC to DC regulated output switching power supply characterized by:
the AC to DC regulated output switching power supply includes:
the commercial power supply is used for supplying 220V alternating current;
the voltage reduction rectification module is used for converting 220V alternating current into direct current;
the first filtering module is used for filtering direct current for the first time;
the second filtering module is used for filtering the filtered direct current again;
the voltage output module is used for supplying voltage to a load to work;
the feedback voltage stabilizing module is used for feeding back a voltage signal to the voltage output module according to the voltage output by the voltage output module and regulating the voltage output by the voltage output module;
the voltage reduction rectifier module is connected with the first filter module, the first filter module is connected with the second filter module, the second filter module is connected with the voltage output module, and the voltage output module is connected with the feedback voltage stabilization module in a two-way mode.
2. The AC-to-DC regulated output switching power supply according to claim 1, wherein the first filtering module comprises a capacitor C1, a capacitor C2, an inductor L1, a transistor V1 and a switch S1, one end of the capacitor C1 is connected with the buck rectifying module, the inductor L1 and the switch S1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected with the capacitor C2 and the base of the transistor V1, the other end of the capacitor C2 is grounded, the other end of the switch S1 is connected with the collector of the transistor V1, and the emitter of the transistor V1 is connected with the second filtering module.
3. An AC-to-DC regulated output switching power supply according to claim 2, wherein the second filtering module comprises a capacitor C3, an inductor L2, a resistor R1, a transistor V2 and a capacitor C4, one end of the capacitor C3 is connected with the inductor L2 and the first filtering module, the other end of the capacitor C3 is grounded, the other end of the inductor L2 is connected with the resistor R1 and the base of the transistor V2, the other end of the resistor R1 is grounded, the collector of the transistor V2 is connected with the other end of the switch S1, the emitter of the transistor V2 is connected with the capacitor C4 and the voltage output module, and the other end of the capacitor C4 is grounded.
4. An AC-to-DC regulated output switching power supply according to claim 1, wherein the voltage output module comprises a resistor R2, a diode D1, a resistor R3, a transistor V3 and a transistor V4, one end of the resistor R2 is connected with the second filtering module, the other end of the resistor R2 is connected with the anode of the diode D1, the collector of the transistor V3 and the collector of the transistor V4, the cathode of the diode D1 is connected with a resistor R3, the other end of the resistor R3 is connected with the base of the transistor V3, the emitter of the transistor V3 is connected with the base of the transistor V4, and the emitter of the transistor V4 is connected with the feedback voltage stabilizing module.
5. An AC-to-DC regulated output switching power supply according to claim 1, wherein the feedback regulator module comprises a transistor V5, a diode D2, a resistor R4, a resistor R5, a potentiometer R6, a resistor R7, a capacitor C5 and a voltmeter Y, one end of the resistor R4 is connected to the resistor R5, the capacitor C5, the voltmeter Y and the voltage output module, the other end of the capacitor C5 is grounded, the other end of the voltmeter Y is grounded, the other end of the resistor R4 is connected to the negative electrode of the diode D2 and the emitter of the transistor V5, the positive electrode of the diode D2 is grounded, the other end of the resistor R5 is connected to the potentiometer R6, the other end of the potentiometer R6 is connected to the resistor R7, the other end of the resistor R7 is grounded, the sliding end of the potentiometer R6 is connected to the base of the transistor 539v 5, and the collector of the transistor V5 is connected to the voltage output module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123035722.5U CN217135392U (en) | 2021-12-06 | 2021-12-06 | AC to DC voltage-stabilizing output switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123035722.5U CN217135392U (en) | 2021-12-06 | 2021-12-06 | AC to DC voltage-stabilizing output switching power supply |
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| Publication Number | Publication Date |
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| CN217135392U true CN217135392U (en) | 2022-08-05 |
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| CN202123035722.5U Active CN217135392U (en) | 2021-12-06 | 2021-12-06 | AC to DC voltage-stabilizing output switching power supply |
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- 2021-12-06 CN CN202123035722.5U patent/CN217135392U/en active Active
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