CN206686394U - LED power supply - Google Patents
LED power supply Download PDFInfo
- Publication number
- CN206686394U CN206686394U CN201720149333.XU CN201720149333U CN206686394U CN 206686394 U CN206686394 U CN 206686394U CN 201720149333 U CN201720149333 U CN 201720149333U CN 206686394 U CN206686394 U CN 206686394U
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- circuit
- filter
- output
- rectifier
- power supply
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Abstract
It the utility model is related to a kind of LED power supply, including electromagnetic compatibility circuit, current rectifying and wave filtering circuit, flyback power supply governor circuit and output rectifier and filter；Wherein city's alternating current is inputted to the input of electromagnetic compatibility circuit, the output end of electromagnetic compatibility circuit electrically connects with the input of rectifier and filter circuit, the output end of rectifier and filter circuit electrically connects with flyback power supply governor circuit input, the output end of flyback power supply governor circuit electrically connects with the input of output rectifier and filter, the output termination LED load of output rectifier and filter；Feature is that the output rectifier and filter includes the tenth electric capacity, the second electrochemical capacitor, the 17th resistance, the 18th resistance, the 3rd diode and the 3rd inductance.Its advantage is：Exporting less than in the case of DC60V, can directly change LED load in the case of the energization of power supply, lamp bead will not be damaged, and greatly shorten the time of lamp maintenance, improve maintenance efficiency.
Description
Technical field
It the utility model is related to a kind of LED power supply.
Background technology
Exporting less than in the case of DC60V, existing LED power is cannot to be changed in the case of the energization of power supply
LED loads, if directly changing lamp bead, lamp bead can be damaged.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art and provides a kind of LED power supply, is less than in output
In the case of DC60V, LED load can be directly changed in the case of the energization of power supply, lamp bead will not be damaged, greatly contracted
The time of short lamp maintenance, improve maintenance efficiency.
In order to achieve the above object, the utility model is achieved in that it is a kind of LED power supply, including electromagnetism is simultaneous
Capacitive circuit, current rectifying and wave filtering circuit, flyback power supply governor circuit and output rectifier and filter；Wherein city's alternating current is inputted to electricity
The input of magnetic compatible circuit, the output end of electromagnetic compatibility circuit electrically connect with the input of rectifier and filter circuit, rectifier and filter
The output end of circuit electrically connects with flyback power supply governor circuit input, the output end of flyback power supply governor circuit and output
The input electrical connection of current rectifying and wave filtering circuit, the output termination LED load of output rectifier and filter；It is it is characterized in that described defeated
Going out current rectifying and wave filtering circuit includes the tenth electric capacity, the second electrochemical capacitor, the 17th resistance, the 18th resistance, the 3rd diode and the
Three inductance；Wherein, the tenth electric capacity electrically connects with one end after the 18th resistant series with the anode of the 3rd diode, and the end with it is anti-
The output end electrical connection of excitation power supply governor circuit, the negative electrode with the 3rd diode, the second electrochemical capacitor be just respectively for the other end
End and the electrical connection of one end of the 17th resistance, the negative electrode of the 3rd diode are the anode of output rectifier and filter output end；The
One end electrical connection of the negative terminal of two electrochemical capacitors, the other end of the 17th resistance and the 3rd inductance, the negative terminal of the second electrochemical capacitor
By capacity earth, the other end of the 3rd inductance is the negative terminal of output rectifier and filter output end.
The utility model compared with prior art the advantages of be：In the case where output is less than DC60V, in the energization of power supply
In the case of can directly change LED load, lamp bead will not damage, and greatly shorten the time of lamp maintenance, improve maintenance
Efficiency.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.Herein it should be noted that
It is used to help understand the utility model for the explanation of these embodiments, but does not form to restriction of the present utility model.This
Outside, as long as technical characteristic involved in each embodiment of the utility model disclosed below does not form punching each other
Prominent can is combined with each other.
In description of the present utility model, term " first " to " the 18th " be only used for describe purpose, and it is not intended that
Instruction implies relative importance.
As shown in figure 1, it is a kind of LED power supply, including electromagnetic compatibility circuit 1, current rectifying and wave filtering circuit 2, inverse-excitation type electricity
Source governor circuit 3 and output rectifier and filter 4；Wherein city's alternating current inputs simultaneous to the input of electromagnetic compatibility circuit 1, electromagnetism
The output end of capacitive circuit 1 electrically connects with the input of rectifier and filter circuit 2, output end and the inverse-excitation type electricity of rectifier and filter circuit 2
The input of source governor circuit 3 electrically connects, the output end of flyback power supply governor circuit 3 and the input of output rectifier and filter 4
End electrical connection, the output termination LED load of output rectifier and filter 4；The output rectifier and filter 4 includes the tenth electric capacity
C10, the second electrochemical capacitor E2, the 17th resistance R17, the 18th resistance R18, the 3rd diode D3 and the 3rd inductance L3；Wherein,
One end electrically connects with the 3rd diode D3 anode after tenth electric capacity C10 connects with the 18th resistance R18, and the end also with flyback
Formula power supply governor circuit 3 output end electrical connection be the second transformer T2 6 pin electrical connection, the other end respectively with the 3rd diode
One end electrical connection of D3 negative electrode, the second electrochemical capacitor E2 anode and the 17th resistance R17, the 3rd diode D3 negative electrode are
The anode of the output end of output rectifier and filter 4；Second electrochemical capacitor E2 negative terminal, the 17th resistance R17 other end and
Three inductance L3 one end electrical connection, the second electrochemical capacitor E2 negative terminal also electrically connect with the second transformer T2 7 pin and pass through electricity
Hold CY2 ground connection, the 3rd inductance L3 other end is the negative terminal of the output end of output rectifier and filter 4.
In the present embodiment, electromagnetic compatibility circuit 1, current rectifying and wave filtering circuit 2 and flyback power supply governor circuit 3 are using normal
Circuit；
Electromagnetic compatibility circuit 1 includes protective tube FR1, the first transformer T1, the first inductance L1, the electricity of the first electric capacity C1 and first
Hinder R1.
Rectifier and filter circuit 2 includes bridge rectifier D B1, second resistance R2,3rd resistor R3, piezo-resistance RV, second
Electric capacity C2, the 3rd electric capacity C3 and the second inductance L2；Because it is conventional circuit, therefore no longer describe their connecting relation.
Flyback power supply governor circuit 3 includes the 4th resistance R4 to the 16th resistance R16, metal-oxide-semiconductor Q1, the pole of the first voltage stabilizing two
Pipe DZ1, the first diode D1, the second diode D2, inverse-excitation type PWM controller U1 and the second transformer T2；Because it is conventional
Circuit, therefore no longer describe their connecting relation；Second mono- group of transformer T2 outputs are the second transformer T2 6 pin and 7
Pin.
During work, city's alternating current is inputted to the rectification of rectifier and filter circuit 2 and filtering after inputting to electromagnetic compatibility circuit 1
Become direct current, form pulse voltage after the DC supply input to flyback power supply governor circuit 3, the pulse voltage is inputted to defeated
Go out the DC voltage needed for the formation LED of current rectifying and wave filtering circuit 4.
When LED lamp bead, which loads, to be accessed, electric current from the 3rd diode D3 negative electrode are LED+ outflows, flow into LED lamp bead and bear
The effect by the 3rd inductance L3 bufferings is carried, hinders electric current instantaneous variation, so as to which LED lamp bead will not be damaged, is protected so as to reach
Protect the effect of LED lamp bead load；At work, the 3rd inductance L3 hinders the change of electric current, but this effect hinders with resistance
It is distinguishing to hinder current flowing effect, and it is consumption electric energy that resistance, which hinders current flowing effect, and inductive obstacle electric current moment
Change is purely then not allow the increase of curent change, when a current increases inductive obstacle electric current moment, when the current decreases inductance
Hinder the reduction of electric current.Inductive obstacle curent change process does not consume electric energy, when hindering electric current increase, it by the energy of electricity with
The form in magnetic field temporarily stores, and until electric current reduces, it also discharges the energy in magnetic field, for result, is exactly
Hinder the change of electric current moment.
Embodiment of the present utility model is explained in detail above in association with accompanying drawing, but the utility model is not limited to institute
The embodiment of description.For the ordinary skill in the art, principle and objective of the present utility model are not being departed from
In the case of to these embodiments carry out it is a variety of change, modification, replace and deformation still fall within the scope of protection of the utility model
It is interior.
Claims (1)
1. a kind of LED power supply, including electromagnetic compatibility circuit（1）, current rectifying and wave filtering circuit（2）, flyback power supply governor circuit（3）
And output rectifier and filter（4）；Wherein city's alternating current is inputted to electromagnetic compatibility circuit（1）Input, electromagnetic compatibility circuit
（1）Output end and rectifier and filter circuit（2）Input electrical connection, rectifier and filter circuit（2）Output end and inverse-excitation type electricity
Source governor circuit（3）Input electrically connects, flyback power supply governor circuit（3）Output end and output rectifier and filter（4）
Input electrical connection, output rectifier and filter（4）Output termination LED load；It is characterized in that the output rectification filter
Wave circuit（4）Including the tenth electric capacity（C10）, the second electrochemical capacitor（E2）, the 17th resistance（R17）, the 18th resistance（R18）、
3rd diode（D3）And the 3rd inductance（L3）；Wherein, the tenth electric capacity（C10）With the 18th resistance（R18）After series connection one end with
3rd diode（D3）Anode electrical connection, and the end and flyback power supply governor circuit（3）Output end electrical connection, the other end
Respectively with the 3rd diode（D3）Negative electrode, the second electrochemical capacitor（E2）Anode and the 17th resistance（R17）One end be electrically connected
Connect, the 3rd diode（D3）Negative electrode be output rectifier and filter（4）The anode of output end；Second electrochemical capacitor（E2）It is negative
End, the 17th resistance（R17）The other end and the 3rd inductance（L3）One end electrical connection, the second electrochemical capacitor（E2）Negative terminal lead to
Cross electric capacity（CY2）Ground connection, the 3rd inductance（L3）The other end be output rectifier and filter（4）The negative terminal of output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720149333.XU CN206686394U (en) | 2017-02-20 | 2017-02-20 | LED power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720149333.XU CN206686394U (en) | 2017-02-20 | 2017-02-20 | LED power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206686394U true CN206686394U (en) | 2017-11-28 |
Family
ID=60396073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720149333.XU Expired - Fee Related CN206686394U (en) | 2017-02-20 | 2017-02-20 | LED power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206686394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521694A (en) * | 2018-03-29 | 2018-09-11 | 电子科技大学 | A kind of LED half-bridge circuits of band feedback frequency-conversion constant-current driving |
-
2017
- 2017-02-20 CN CN201720149333.XU patent/CN206686394U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521694A (en) * | 2018-03-29 | 2018-09-11 | 电子科技大学 | A kind of LED half-bridge circuits of band feedback frequency-conversion constant-current driving |
| CN108521694B (en) * | 2018-03-29 | 2023-09-22 | 电子科技大学 | LED half-bridge circuit with feedback variable-frequency constant-current drive |
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Legal Events
| 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: 20171128 Termination date: 20200220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |