CN214100956U - AC/DC double power supply - Google Patents
AC/DC double power supply Download PDFInfo
- Publication number
- CN214100956U CN214100956U CN202022303090.5U CN202022303090U CN214100956U CN 214100956 U CN214100956 U CN 214100956U CN 202022303090 U CN202022303090 U CN 202022303090U CN 214100956 U CN214100956 U CN 214100956U
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- triode
- power supply
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- diode
- circuit
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 230000009977 dual effect Effects 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model discloses an alternating current-direct current dual supply, including step-down rectifier module, harmonic filtering module, voltage stabilizing circuit, output circuit and DC power supply, mains power is connected to step-down rectifier module's input, and harmonic filtering module is connected to step-down rectifier module's output, and voltage stabilizing circuit and DC power supply are connected to harmonic filtering module, and DC power supply connects voltage stabilizing circuit, and voltage stabilizing circuit connects output circuit, compares with prior art, the beneficial effects of the utility model are that: when the commercial power supply is disconnected, the standby direct-current power supply in the circuit can be automatically started, manual operation and control are not needed, the circuit structure is simple, the cost is saved, and the circuit is provided with the voltage stabilizing module, so that the service life of the load can be prolonged.
Description
Technical Field
The utility model relates to a dual supply switching circuit field specifically is an alternating current-direct current dual supply.
Background
With the development of science and technology, precise instruments required by various experiments need to be kept in a power-on state all the time, power supplies need to be switched, the fact that the instruments are powered on all the time is guaranteed, data cannot be lost, the living demands of people are higher and higher, a plurality of power supplies are arranged on various daily articles at present, and a mobile phone and a notebook computer can be connected with a commercial power supply and can also use the power supplies carried by the mobile phone and the notebook computer.
The power switching circuits currently used in the market are generally complex, the voltage is not stable enough, and damage to the load is easily caused, and these disadvantages need to be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an alternating current-direct current dual supply to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an alternating current-direct current dual supply, includes step-down rectifier module, harmonic filtering module, voltage stabilizing circuit, output circuit and DC power supply, mains power supply is connected to step-down rectifier module's input, and harmonic filtering module is connected to step-down rectifier module's output, and voltage stabilizing circuit and DC power supply are connected to harmonic filtering module, and DC power supply connects voltage stabilizing circuit, and voltage stabilizing circuit connects output circuit.
As a further aspect of the present invention: the voltage-reducing rectification module comprises a rectifier T and a transformer W, the harmonic filtering module adopts a filter K, the voltage stabilizing circuit comprises a triode V2, a triode V3 and a resistor R3, the output circuit comprises a diode D2 and a load X, the direct current power supply comprises a battery E1, a resistor R1, a resistor R2, a capacitor C1, a triode V1, a potentiometer RP and an MOS tube VT1, the primary winding of the transformer W is connected with 220V alternating current, the secondary winding of the transformer W is connected with the rectifier T, the output port 2 of the rectifier T is connected with the port 1 of the filter, the port 2 of the filter is connected with the output port 4 of the rectifier T, the port 4 of the filter is grounded, the port 3 of the filter is connected with the cathode of the diode D1, the potentiometer RP, the collector of the triode V2, the collector of the triode V3 and the emitter of the resistor R3, the triode V2 is connected with the base of the triode V3, the base of the triode V2 is connected with the other end of the resistor R3, the emitter of the triode V3 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the load X, the other end of the load X is grounded, the anode of the diode D1 is connected with the S pole of the MOS tube VT1, the D pole of the MOS tube VT1 is connected with the resistor R1, the capacitor C1 and the anode of the battery E1, the G pole of the MOS tube VT1 is connected with the other end of the capacitor C1, the other end of the resistor R1 and the emitter of the triode V1, the cathode of the battery E1 is grounded, the collector of the triode V1 is grounded, the other end of the potentiometer RP is grounded, the sliding end of the potentiometer RP is connected with the resistor R2, and the other end of the resistor R2 is connected with the base of the triode V1.
As a further aspect of the present invention: the MOS transistor VT1 is an NMOS transistor.
As a further aspect of the present invention: the triode V1, the triode V2 and the triode V3 are all NPN type triodes.
As a further aspect of the present invention: the diode D1 is a current limiting diode, and the diode D2 is a light emitting diode.
As a further aspect of the present invention: the rectifier T is a bridge rectifier circuit.
Compared with the prior art, the beneficial effects of the utility model are that: when the commercial power supply is disconnected, the standby direct-current power supply in the circuit can be automatically started, manual operation and control are not needed, the circuit structure is simple, the cost is saved, and the circuit is provided with the voltage stabilizing module, so that the service life of the load can be prolonged.
Drawings
Fig. 1 is a schematic diagram of an ac/dc dual power supply.
Fig. 2 is a circuit diagram of an ac/dc dual power supply.
Fig. 3 is a circuit diagram of the filter.
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.
Example 1: referring to fig. 1, an AC-DC dual power supply includes a step-down rectification module for AC-AC and AC-DC conversion, a harmonic filtering module for filtering harmonic interference, a DC power supply for automatically switching power supplies after a mains supply is disconnected, a voltage stabilizing circuit for stabilizing voltage, and an output circuit for outputting voltage, wherein an input end of the step-down rectification module is connected to the mains supply, an output end of the step-down rectification module is connected to the harmonic filtering module, the harmonic filtering module is connected to the voltage stabilizing circuit and the DC power supply, the DC power supply is connected to the voltage stabilizing circuit, and the voltage stabilizing circuit is connected to the output circuit.
The specific circuit is shown in fig. 2, the buck rectifying module includes a rectifier T and a transformer W, the harmonic filtering module adopts a filter K, the voltage stabilizing circuit includes a transistor V2, a transistor V3, and a resistor R3, the output circuit includes a diode D2 and a load X, the dc power supply includes a battery E1, a resistor R1, a resistor R2, a capacitor C1, a transistor V1, a potentiometer RP, and a MOS transistor VT1, the primary winding of the transformer W is connected to the 220V ac power, the secondary winding of the transformer W is connected to the rectifier T, the output port 2 of the rectifier T is connected to the port 1 of the filter T, the port 2 of the filter is connected to the output port 4 of the rectifier T, the port 4 of the filter is grounded, the port 3 of the filter is connected to the negative electrode of the diode D1, the potentiometer RP, the collector of the transistor V2, the collector of the transistor V3, the resistor R3, the emitter of the transistor V2 is connected to the base of the transistor V3, the base electrode of the triode V2 is connected with the other end of the resistor R3, the emitter electrode of the triode V3 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the load X, the other end of the load X is grounded, the anode of the diode D1 is connected with the S electrode of the MOS tube VT1, the D electrode of the MOS tube VT1 is connected with the resistor R1, the capacitor C1 and the anode of the battery E1, the G electrode of the MOS tube VT1 is connected with the other end of the capacitor C1, the other end of the resistor R1 and the emitter electrode of the triode V1, the cathode of the battery E1 is grounded, the collector electrode of the triode V1 is grounded, the other end of the potentiometer RP is grounded, the sliding end of the potentiometer RP 2 is connected with the resistor R2, and the base electrode of the triode V1 is connected with the other end of the potentiometer RP 2.
The utility model discloses a theory of operation is: when the mains supply is connected, the current enters the voltage stabilizing circuit through the filter K, the current leads the base of the triode V2 to be conducted through the resistor R3, the emitter of the triode V2 has current to pass, the base of the triode V3 is conducted, the triode V3 is conducted, the output circuit is conducted, the light-emitting diode is lightened to play a role in prompting, the load works, when the input voltage is changed, the current passing through the resistor R3 is changed, the conducting state of the base of the triode V2 is changed, the conducting state of the triode V3 is changed, collector currents of the triode V2 and the triode V3 are changed, the collector currents of the triode V2 and the triode V3 are changed because the input current is determined, the current passing through the resistor R3 is changed to form a feedback loop, the diode D1 prevents the mains current from flowing in, the potentiometer RP can change the voltage of the base of the triode V1, the conducting state of a triode V1 is changed, a triode V1 is conducted, so that voltage filtered by a filter K, a potentiometer RP, a resistor R2, a triode V1, a resistor R1 and a battery E1 form a loop, a battery E1 is charged, an NMOS tube VT1 is in a cut-off state at the moment, when a mains supply is disconnected, the triode V1 is cut off, the battery E1 generates electricity, voltage is applied to an NM0S tube VT1 to be conducted, current flows through a voltage stabilizing circuit to enter a load, the load works, and a capacitor C2 and a capacitor C3 in the figure III play a filtering role.
In embodiment 2, based on embodiment 1, in fig. 3, the resistor R4 is connected between the collector and the emitter of the transistor V4, and the current is small, so that the ripple has a large drop, and the direct current does not have a large loss, the capacitor C3 is connected in the loop where the base of the transistor V4 and the emitter of the transistor V4 are located, so that the capacitor C3 has a filtering effect that a large capacitor can achieve when the capacitor is small, and the resistor R5 has a function of delaying the receiving and discharging speed of the capacitor.
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 alternating current-direct current dual power supply comprises a voltage reduction rectification module, a harmonic filtering module, a voltage stabilizing circuit, an output circuit and a direct current power supply, and is characterized in that the input end of the voltage reduction rectification module is connected with a mains supply, the output end of the voltage reduction rectification module is connected with the harmonic filtering module, the harmonic filtering module is connected with the voltage stabilizing circuit and the direct current power supply, the direct current power supply is connected with the voltage stabilizing circuit, the voltage stabilizing circuit is connected with the output circuit, the voltage reduction rectification module comprises a rectifier T and a transformer W, the harmonic filtering module adopts a filter K, the voltage stabilizing circuit comprises a triode V2, a triode V3 and a resistor R3, the output circuit comprises a diode D2 and a load X, the direct current power supply comprises a battery E1, a resistor R1, a resistor R2, a capacitor C1, a triode V1, a potentiometer RP and an MOS tube VT1, a primary winding of the transformer W is connected with 220V alternating current, and a secondary winding of the transformer W is connected with the rectifier T, an output port 2 of the rectifier T is connected with a port 1 of the filter, the port 2 of the filter is connected with an output port 4 of the rectifier T, the port 4 of the filter is grounded, a port 3 of the filter is connected with the negative electrode of a diode D1, a potentiometer RP, the collector of a triode V2, the collector of a triode V3 and a resistor R3, the emitter of the triode V2 is connected with the base of a triode V3, the base of a triode V2 is connected with the other end of a resistor R3, the emitter of the triode V3 is connected with the positive electrode of a diode D2, the negative electrode of the diode D2 is connected with a load X, the other end of the load X is grounded, the positive electrode of a diode D1 is connected with the S electrode of a MOS tube VT1, the D electrode of the MOS tube VT1 is connected with a resistor R1, a capacitor C1 and the positive electrode of a battery E1, the G electrode of the MOS tube VT1 is connected with the other end of a capacitor C1, the other end of the resistor R1 and the emitter of the triode V1, the negative electrode of the battery E1 is grounded, the negative electrode of the triode V1, the collector of the triode V1 is grounded, the sliding end of the potentiometer RP is connected with a resistor R2, and the other end of the resistor R2 is connected with the base electrode of the triode V1.
2. The dual power supply of claim 1, wherein the MOS transistor VT1 is an NMOS transistor.
3. The dual power supply of claim 1, wherein the transistor V1, the transistor V2, and the transistor V3 are all NPN transistors.
4. The dual power supply of claim 1, wherein the diode D1 is a current limiting diode and the diode D2 is a light emitting diode.
5. The dual AC/DC power supply of claim 3, wherein the rectifier T is a bridge rectifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022303090.5U CN214100956U (en) | 2020-10-15 | 2020-10-15 | AC/DC double power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022303090.5U CN214100956U (en) | 2020-10-15 | 2020-10-15 | AC/DC double power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214100956U true CN214100956U (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022303090.5U Expired - Fee Related CN214100956U (en) | 2020-10-15 | 2020-10-15 | AC/DC double power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214100956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116707112A (en) * | 2023-05-17 | 2023-09-05 | 无锡广盈集团有限公司 | Dual-power intelligent power supply circuit based on lithium battery |
-
2020
- 2020-10-15 CN CN202022303090.5U patent/CN214100956U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116707112A (en) * | 2023-05-17 | 2023-09-05 | 无锡广盈集团有限公司 | Dual-power intelligent power supply circuit based on lithium battery |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |