CN106505878A - Power source drive device for inquiry system terminal - Google Patents
Power source drive device for inquiry system terminal Download PDFInfo
- Publication number
- CN106505878A CN106505878A CN201610941308.5A CN201610941308A CN106505878A CN 106505878 A CN106505878 A CN 106505878A CN 201610941308 A CN201610941308 A CN 201610941308A CN 106505878 A CN106505878 A CN 106505878A
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- circuit
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- electric capacity
- inductance
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of power source drive device for inquiry system terminal, including input circuit, rectification circuit and output circuit；Input circuit includes that power supply and transformator, the two ends of the second siding ring of transformator are connected with the input of rectification circuit as the outfan of input circuit；Rectification circuit includes full-wave rectification bridge；Output circuit includes switching tube, fly-wheel diode, the 3rd inductance and the 3rd electric capacity；The base stage of the switching tube is connected with control signal generating meanss, and the two ends of the 3rd electric capacity are connected with LED as the outfan of output circuit.The present invention replaces electrochemical capacitor with switching tube, can greatly improve the life-span of driving power supply, make circuit reduction, so as to improve efficiency, reduces cost；In addition, isolated buck is carried out by arranging transformator to civil power, so as to mitigate the carrying burden of electronic devices and components in circuit, further increase service life of equipment.
Description
Technical field
The present invention relates to a kind of driving power supply, in more detail, is related to a kind of power drives for inquiry system terminal and fills
Put.
Background technology
With the development of science and technology, all trades and professions are all proposed the inquiry system suitable for the industry, with the life being convenient for people to
Living, and inquiry system terminal be unable to do without display screen, wherein, LED display is most commonly seen one kind.
LED（Light emitting diode）Many advantages, such as with its energy-saving and environmental protection, high brightness, long-life, becomes the green illumination of a new generation
Light source.With day by day ripe, its various aspects at last for life of LED illumination technology, and become the new lover of lighting source.
The LED for substituting now general bulb on the market was about 40 times of incandescent lamp bulb life-span, equivalent to 40,000 hours.As LED is
Direct current driven part, by the electric current for flowing through, directly converts electrical energy into luminous energy, therefore also referred to as optical-electrical converter.Cause
For there is no friction, mechanical loss, thus in terms of energy-conservation than general light source efficiency high.
As LED is DC powered part, the use supporting corresponding driving power supply of needs, existing LED of LED drive
Power supply includes that commutating circuit is peaceful and slides back to road（Make unidirectional current stable）, but smoothing necessary electrochemical capacitor time in loop can be because of week
Temperature and the heating of itself enclosed and rise 10 DEG C, so as to cause the LED drive power life-span significantly to reduce, so as to affect LED
The life-span of ligthing paraphernalia；Further, since line voltage is higher, electric current is larger, and wherein in containing a large amount of harmonic waves and surge, such as
Fruit directly carries out rectification to civil power, can increase the carrying burden of fairing, and the life-time service to electronic devices and components is unfavorable.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of power drives for inquiry system terminal are filled
Put, which not only eliminates electrochemical capacitor, isolated buck is carried out also by transformator, extend electronics device in driving power supply so as to have
Part life-span, the advantage for improving source efficiency.
The present invention is solved the above problems by the following technical programs：
For the power source drive device of inquiry system terminal, including input circuit, rectification circuit and output circuit；Input circuit bag
Power supply and transformator is included, power supply is connected with the first siding ring of transformator, and the two ends of the second siding ring of transformator are used as input
The outfan of circuit is connected with the input of rectification circuit；Rectification circuit includes full-wave rectification bridge, the Si Tiaoqiao of full-wave rectification bridge
Arm is joined end to end successively, and the junction point of four bridge arms is set to a points, b points, c points and d points successively, and a points and c points are used as all-wave
The input of rectifier bridge is connected with the two ends of the second siding ring of the transformator, the outfan of b points and d points as rectification circuit
It is connected with the input of output circuit；Output circuit includes switching tube, fly-wheel diode, the 3rd inductance and the 3rd electric capacity；Described
The base stage of switching tube is connected with control signal generating meanss, and the emitter stage of switching tube is whole with all-wave as the input of output circuit
The b points of stream bridge are connected, and the colelctor electrode of switching tube is connected with the positive pole of fly-wheel diode, and the positive pole of fly-wheel diode is also electric with the 3rd
One end of sense is connected, and the negative pole of fly-wheel diode is connected with the d points of full-wave rectification bridge as the input of output circuit, and afterflow
The negative pole of diode is also connected with one end of the 3rd electric capacity, two pole of other end connection afterflow relative with the 3rd inductance of the 3rd electric capacity
The other end of pipe is connected, and the two ends of the 3rd electric capacity are used as the outfan of output circuit.During using the present invention, the electricity of input circuit
Source is civil power, and as the voltage of civil power is higher, electric current is larger, and therefore first passing through transformator carries out isolated buck to civil power, through drop
Civil power after pressure is still alternating current, and LED is DC driven part, and therefore electric main first passes through full-wave rectification bridge rectification
Into unidirectional current, then the input of output circuit of making a gift to someone, the letter that control signal generating meanss that the base stage of switching tube is connected send
Number be high-frequency oscillation signal, when the signal that control signal generating meanss send be high level when, switching tube saturation conduction works as control
When the signal that signal generation apparatus send is low level, switching tube ends, as control signal generating meanss are believed for the higher-order of oscillation
Number, the time that switching tube ends each time is very of short duration, and as in inductance, electric current can not be mutated, in electric capacity, voltage can not be mutated,
Therefore, in the presence of fly-wheel diode, the 3rd inductance and the 4th electric capacity, the electric current of output is continuous and stable, be well suited for for
LED provides operating current, and switching tube have life-span length, safe and reliable, without mechanical wear, switching speed be fast, volume
Little the features such as, therefore the present invention both eliminated electrochemical capacitor, mitigate electronic devices and components in circuit further through transformer pressure-reducing
Burden is carried, such that it is able to improve the life-span of driving power supply, and circuit is relatively easy, thus also reduces cost, improves
Efficiency.
Further, the output circuit also includes the first Zener diode and the second Zener diode；Described first is steady
Pressure diode is arranged on the circuit that the colelctor electrode of switching tube is connected with the positive pole of fly-wheel diode, and the first Zener diode
Negative pole is connected with the colelctor electrode of switching tube, and the positive pole of the first Zener diode is connected with the positive pole of fly-wheel diode；Described second
Zener diode is in parallel with the 3rd electric capacity, and the junction point of the positive pole of the second Zener diode and the 3rd electric capacity be the 3rd electric capacity with
The junction point of the 3rd inductance.Zener diode is set, on the one hand can prevent switching tube from having reverse current stream in the moment of shut-off
Damage circuit parts are crossed, the output voltage of output circuit on the other hand can be made to keep stable, power supply quality is improved.
Further, the input circuit also includes the first electric capacity and the first inductance, the first inductance be series at transformator with
On the circuit that a points of full-wave rectification bridge are connected, the first electric capacity is a little connected with a points of full-wave rectification bridge, the other end and all-wave
The c points of rectifier bridge are connected.By arranging the first electric capacity and the first inductance, can with filtering circuit in higher hamonic wave so that circuit
Little by the interference of power supply, it is ensured that power supply quality.
Further, the rectification circuit also includes the second electric capacity and the second inductance；One end of second inductance with complete
The d points of ripple rectifier bridge are connected, and the other end is connected with the negative pole of fly-wheel diode in output circuit as the outfan of rectification circuit,
One end of second electric capacity is connected with the b points of full-wave rectification bridge, and the other end of the second electric capacity connection all-wave relative with the second inductance is whole
The other end of a points of stream bridge is connected.By arranging the first electric capacity and the first inductance, the exchange after rectification point can be further filtered out
Amount, so as to ensure the DC current for exporting high-quality, improves current quality.
Further, the input circuit also includes fuse and surge absorber；The surge absorber and transformator
First siding ring in parallel, and one end of surge absorber is connected with one end of power supply by fuse, surge absorber another
One end is connected with the other end of power supply.When setting fuse is in order that there is the peak current of harm circuit to produce in circuit, fast
Speed is cut off circuit to protect load；It is to absorb electrostatic and surge from input, protected with this to arrange surge absorber
Shield circuit below.
The beneficial effects of the present invention is：
1st, replace electrochemical capacitor with switching tube, the life-span of driving power supply can be greatly improved, circuit reduction is made, so as to improve effect
Rate, reduces cost；In addition, isolated buck is carried out to civil power by arranging transformator, so as to mitigate electronic devices and components in circuit
Carrying burden, further increase service life of equipment.
2nd, by arranging Zener diode, on the one hand can prevent switching tube from having reverse current to flow through damage in the moment of shut-off
Hinder circuit parts, the output voltage of output circuit on the other hand can be made to keep stable, power supply quality is improved.
3rd, pass through electric capacity and inductance to be arranged in input circuit, can filter the higher hamonic wave in civil power and surge so that
Circuit is little by the interference of power supply, it is ensured that power supply quality.
4th, by arranging fuse and surge absorber, the harm of peak current and surge can be protected the circuit from, is carried
The overall security of high circuit, so that improve the service life of driving power supply.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Parts title in accompanying drawing corresponding to labelling：Ui power supplys, F fuses, Z surge absorbers, T transformations
Device, IC1 full-wave rectification bridges, VT1 switching tubes, the first electric capacity of C1, the second electric capacity of C2, the 3rd electric capacity of C3, L1
One inductance, the second inductance of L2, the 3rd inductance of L3, the first Zener diodes of D1, the second Zener diodes of D2, D3 continue
Stream diode, D4 LEDs, UC control signal generating meanss.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As shown in figure 1, the present embodiment provides the power source drive device for inquiry system terminal, including input circuit, whole
Current circuit and output circuit.
Input circuit bag expands power supply Ui, transformator T, fuse F, surge absorber Z, the first inductance L1 and the first electric capacity
C1, surge absorber Z are in parallel with the first siding ring of transformator T, and one end of the first siding ring of transformator T passes through fuse F
It is connected with one end of power supply Ui, the other end of the first siding ring of transformator T is connected with the other end of power supply Ui, transformator T's
One end of second siding ring is connected with one end of the first electric capacity C1 by the first inductance L1, the second siding ring of transformator T another
One end is connected with the other end of the first electric capacity C1；Outfan and rectification circuit of the two ends of the first electric capacity C1 as input circuit
Input is connected.
Rectification circuit includes four of full-wave rectification bridge IC1, the second inductance L2 and the second electric capacity C2, full-wave rectification bridge IC1
Bridge arm is joined end to end successively, and the junction point of four bridge arms is set to a points, b points, c points and d points successively；A points and c points are used as whole
The input of current circuit is connected with the two ends of the first electric capacity C1 respectively, the one end of d points by the second inductance L2 and the second electric capacity C2
It is connected, the other end of the second electric capacity C2 is connected with the b points of full-wave rectification bridge IC1；The two ends of the second electric capacity C2 are used as rectification circuit
Outfan be connected with the input of output circuit.
Output circuit include switching tube VT1, the first Zener diode D1, the second Zener diode D2, sustained diode 3,
3rd inductance L3 and the 3rd electric capacity C3；The base stage of switching tube VT1 is connected with control signal generating meanss UC, and switching tube VT1 sends out
Emitter-base bandgap grading is connected with one end of the second electric capacity C2 in input circuit as the input of output circuit, the colelctor electrode of switching tube VT1
It is connected with the negative pole of the first Zener diode D1, the positive pole of the first Zener diode D1 is connected with the positive pole of sustained diode 3,
Input with input circuit second electric capacity C2 relative connecting valve pipe VT1 of the negative pole of sustained diode 3 as output circuit
The other end of emitter stage is connected, and the negative pole of sustained diode 3 is connected with one end of the 3rd electric capacity C3, sustained diode 3
Positive pole is connected with the other end of the 3rd electric capacity C3 by the 3rd inductance L3, and the second Zener diode D2 is in parallel with the 3rd electric capacity C3,
And second Zener diode D2 positive pole and the 3rd electric capacity C3 junction point be the 3rd electric capacity C3 and the 3rd inductance L3 junction point,
The two ends of the second Zener diode D2 are connected with LED D4 as the outfan of output circuit.
When implementing the present embodiment, civil power first carries out isolated buck through transformator T1, then by the first electric capacity C1 and the first inductance
L1 is filtered, and decreases or even eliminates the higher hamonic wave in circuit, then again through full-wave rectification bridge IC1 rectifications, and by the second electricity
Hold C2 and the second inductance L2 further to filter, eliminate the AC compounent in circuit, so as to obtain high-quality unidirectional current, the direct current
Electric current enters output circuit, and the base stage of switching tube VT1 in the presence of control signal generating meanss UC is constantly turned on and ended,
As the signal that control signal generating meanss UC sends is high-frequency oscillation signal, the time that switching tube VT1 ends each time is very
Of short duration, and the electric current of inductance can not be mutated, and the voltage of electric capacity can not be mutated, so as to the input current of output circuit is in afterflow two
Can remain steadily smooth in the presence of pole pipe D3, the 3rd inductance L3 and the 4th electric capacity C4, and in the first Zener diode D1
Galvanic current is provided with the presence of the second Zener diode D2 for D4 such as LED.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, the be should be understood that specific embodiment that the foregoing is only the present invention is not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements that within the spirit and principles in the present invention, is done etc. all should include
Within protection scope of the present invention.
Claims (5)
1. the power source drive device of inquiry system terminal is used for, it is characterised in that including input circuit, rectification circuit and output electricity
Road；
Input circuit includes power supply（Ui）And transformator（T）, power supply（Ui）With transformator（T）First siding ring be connected, transformation
Device（T）The two ends of second siding ring be connected with the input of rectification circuit as the outfan of input circuit；
Rectification circuit includes full-wave rectification bridge（IC1）, full-wave rectification bridge（IC1）Four bridge arms join end to end successively, and by four
The junction point of bar bridge arm is set to a points, b points, c points and d points successively, and a points and c points are used as full-wave rectification bridge（IC1）Input with
The transformator（T）The two ends of second siding ring be connected, b points and d points outfan and output circuit as rectification circuit
Input connects；
Output circuit includes switching tube（VT1）, fly-wheel diode（D3）, the 3rd inductance（L3）With the 3rd electric capacity（C3）；Described open
Guan Guan（VT1）Base stage be connected with control signal generating meanss（UC）, switching tube（VT1）Emitter stage as the defeated of output circuit
Enter end and full-wave rectification bridge（IC1）B points be connected, switching tube（VT1）Colelctor electrode and fly-wheel diode（D3）Positive pole be connected,
Fly-wheel diode（D3）Positive pole also with the 3rd inductance（L3）One end be connected, fly-wheel diode（D3）Negative pole as output electricity
The input and full-wave rectification bridge on road（IC1）D points be connected, and fly-wheel diode（D3）Negative pole also with the 3rd electric capacity（C3）'s
One end is connected, the 3rd electric capacity（C3）The other end and the 3rd inductance（L3）Relative connection fly-wheel diode（D3）Other end phase
Connect, and the 3rd electric capacity（C3）Two ends as output circuit outfan.
2. the power source drive device for inquiry system terminal according to claim 1, it is characterised in that the output electricity
Road also includes the first Zener diode（D1）With the second Zener diode（D2）；First Zener diode（D1）It is arranged at out
Guan Guan（VT1）Colelctor electrode and fly-wheel diode（D3）The circuit that is connected of positive pole on, and the first Zener diode（D1）Negative
Pole and switching tube（VT1）Colelctor electrode be connected, the first Zener diode（D1）Positive pole and fly-wheel diode（D3）Positive pole phase
Even；Second Zener diode（D2）With the 3rd electric capacity（C3）Parallel connection, and the second Zener diode（D2）Positive pole and the 3rd
Electric capacity（C3）Junction point be the 3rd electric capacity（C3）With the 3rd inductance（L3）Junction point.
3. the power source drive device for inquiry system terminal according to claim 1, it is characterised in that the input electricity
Road also includes the first electric capacity（C1）With the first inductance（L1）, the first inductance（L1）It is series at transformator（T1）With full-wave rectification bridge
（IC1）A points be connected circuit on, the first electric capacity（C1）A little and full-wave rectification bridge（IC1）A points be connected, the other end with
Full-wave rectification bridge（IC1）C points be connected.
4. the power source drive device for inquiry system terminal according to claim 1, it is characterised in that the rectified current
Road also includes the second electric capacity（C2）With the second inductance（L2）；Second inductance（L2）One end and full-wave rectification bridge（IC1）D
Point is connected, outfan and in output circuit fly-wheel diode of the other end as rectification circuit（D3）Negative pole be connected, second electricity
Hold（C2）One end and full-wave rectification bridge（IC1）B points be connected, the second electric capacity（C2）The other end and the second inductance（L2）Relative
Connection full-wave rectification bridge（IC1）A points the other end be connected.
5. the power source drive device for inquiry system terminal according to claim 1, it is characterised in that the input electricity
Road also includes fuse（F）And surge absorber（Z）；The surge absorber（Z）With transformator（T）First siding ring simultaneously
Connection, and surge absorber（Z）One end pass through fuse（F）With power supply（Ui）One end be connected, surge absorber（Z）Another
End and power supply（Ui）The other end be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610941308.5A CN106505878A (en) | 2016-11-02 | 2016-11-02 | Power source drive device for inquiry system terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610941308.5A CN106505878A (en) | 2016-11-02 | 2016-11-02 | Power source drive device for inquiry system terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106505878A true CN106505878A (en) | 2017-03-15 |
Family
ID=58322867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610941308.5A Withdrawn CN106505878A (en) | 2016-11-02 | 2016-11-02 | Power source drive device for inquiry system terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106505878A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112188688A (en) * | 2020-09-09 | 2021-01-05 | 高达文科技控股有限公司 | LED lamp |
-
2016
- 2016-11-02 CN CN201610941308.5A patent/CN106505878A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112188688A (en) * | 2020-09-09 | 2021-01-05 | 高达文科技控股有限公司 | LED lamp |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170315 |
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| WW01 | Invention patent application withdrawn after publication |