CN206149543U - Single -stage high power factor's LED drive power supply - Google Patents
Single -stage high power factor's LED drive power supply Download PDFInfo
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- CN206149543U CN206149543U CN201621051094.6U CN201621051094U CN206149543U CN 206149543 U CN206149543 U CN 206149543U CN 201621051094 U CN201621051094 U CN 201621051094U CN 206149543 U CN206149543 U CN 206149543U
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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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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Abstract
The utility model discloses a single -stage high power factor's LED drive power supply, including NULL circuit, rectification filter circuit, flyback circuit, constant current constant voltage output circuit and the passive PFC circuit of inductance compensation, the output of NULL circuit is connected rectification filter circuit's input, rectification filter circuit's output is connected the flyback circuit, the output connection of flyback circuit constant current constant voltage output circuit, the passive PFC circuit of inductance compensation respectively with rectification filter circuit and flyback circuit connection, the passive PFC circuit of inductance compensation includes electric capacity C2, inductance L4 and charge / discharge circuit module. The utility model provides an among the prior art circuit structure of active PFC power factor correction circuit complicated, the power factor of passive form PFC power factor correction circuit is lower or need main circuit structure do the complex problem.
Description
Technical field
This utility model is related to LED drive power technical field, and the LED for particularly relating to a kind of high-power factor drives
Power supply.
Background technology
It is well known that in recent years LED drive power is used more and more extensively, because LED drive power adopts traditional bridge
Formula rectification, capacitor filter can make AC input electric current produce serious wave distortion, and to electrical network substantial amounts of higher hamonic wave is injected,
Therefore the power factor of grid side is not high, and only 0.6 or so, substantial amounts of higher hamonic wave is caused sternly to electrical network and other electrical equipments
Weight harmonic pollution and interference so that other electrical equipments cannot normal work (i.e. electromagnetic interference-EMI and electromagnetic compatibility-EMC
Problem).And 15W electrical source power factors must be more than 0.9, in order to pursue the quality of light, LED drive power output ripple is certain
Control within 5%.For this purpose, PFC circuit of power factor correction just arises at the historic moment.
PFC circuit of power factor correction has two kinds of circuit topologies：
1. active PFC (also referred to as active PFC), the English full name of PFC is " Power Factor Correction ",
Mean " PFC ".Active PFC is made up of inductance capacitance and electronic components of high power, and components and parts are more, can be by
Power factor brings up to 0.95～0.98 or so, but cost to be higher by passive type PFC many.
2. passive PFC (also referred to as passive type PFC), typically divides " inductance compensation formula " and " valley fill circuit formula (Valley
Fill Circuit) " and " charge pump type (also referred to as switched capacitor voltage changer) circuit ".
A. " inductance compensation method " is that phase contrast reduces to improve power between the fundamental current and voltage for being input into exchange
Factor, the power factor of passive PFC can only achieve 0.7～0.8.
B. " valley fill circuit formula " belongs to a kind of passive power factor correction circuit, is characterized in using behind rectifier bridge
Valley fill circuit increasing considerably the angle of flow of rectifier tube, by filling and leading up valley point, make input current be changed into connecing from spike
The waveform of sine wave is bordering on, power factor is brought up to into 0.85～0.87 or so.
C. charge pump type (also referred to as switched capacitor voltage changer) circuit of power factor correction, charge pump power factor school
Just (Charge Pump Power Factor Correction. abbreviation CPPFC) technology, can bring up to power factor
0.92～0.98 or so, need main circuit structure to do electric device more and coordinate.
Understand, the circuit structure of active PFC circuit of power factor correction of the prior art is complicated, passive PFC work(
The power factor of rate factor correcting circuit is relatively low or needs main circuit structure to do to coordinate.
Utility model content
The utility model proposes a kind of LED drive power of high-power factor, solves active in prior art
The circuit structure of PFC circuit of power factor correction is complicated, the power factor of passive PFC circuit of power factor correction it is relatively low or
Main circuit structure is needed to do the problem for coordinating.
What the technical solution of the utility model was realized in：
A kind of LED drive power of high-power factor, including ac input circuit, current rectifying and wave filtering circuit, Flyback
Circuit, constant current/constant voltage output circuit and inductance compensation passive PFC circuit, the outfan connection of the ac input circuit is described
The input of current rectifying and wave filtering circuit, the outfan of the current rectifying and wave filtering circuit connects the Flyback circuits, the Flyback
The output of circuit connects the constant current/constant voltage output circuit, the inductance compensation passive PFC circuit respectively with the rectifying and wave-filtering
Circuit and Flyback circuits connect；The inductance compensation passive PFC circuit includes electric capacity C2, inductance L4 and charge/discharge circuit mould
Block.
Further, also including protection circuit, the input of the protection circuit connects with the constant current/constant voltage output circuit
Connect, the outfan of the protection circuit is connected with the Flyback circuits.
Further, the charge/discharge circuit module includes diode D1, diode D2 and diode D3, the electric capacity
The two ends of C2 are in parallel with the outfan of the current rectifying and wave filtering circuit, and one end of the electric capacity C2 connects the inductance L4 and described two
The common port of pole pipe D1, the other end of the inductance L4 respectively with one end and one end of the diode D3 of the diode D2
Connection, the other end of the diode D2 is grounded after being connected with the other end of the electric capacity C2, the other end of the diode D3
Connect the Flyback circuits.
Further, the electric capacity C2 be CCB electric capacity, the diode D3 be fast recovery diode, the diode D2
For fly-wheel diode.
Further, the Flyback circuits include transformator T1, one end of the primary side winding of the transformator T1 and institute
State diode D1 connections, its common port is connected with electric capacity C3, the other end of the primary side winding of the transformator T1 respectively with it is described
The drain electrode connection of diode D3 and metal-oxide-semiconductor Q1.
The beneficial effects of the utility model are：Inductance compensation passive PFC circuit includes electric capacity C2, inductance L4 and discharge charge
Electric circuit module, circuit structure is simple, power factor can be caused to reach requirement, it is not necessary to main circuit structure does coordinate.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the theory diagram of the LED drive power of this utility model high-power factor；
Fig. 2 is the theory diagram of the LED drive power preferred embodiment of this utility model high-power factor；
Fig. 3 is the circuit theory diagrams of the LED drive power preferred embodiment of this utility model high-power factor.
In figure, 1- ac input circuits；2- current rectifying and wave filtering circuits；3-Flyback circuits；4- constant current/constant voltage output circuits；
5- inductance compensation passive PFC circuits；6- protection circuits.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
As shown in Figure 1-Figure 3, the utility model proposes a kind of LED drive power of high-power factor, including friendship
Stream input circuit 1, current rectifying and wave filtering circuit 2, Flyback circuits 3, constant current/constant voltage output circuit 4 and the passive PFC of inductance compensation are electric
Road 5, the outfan of ac input circuit 1 connects the input of current rectifying and wave filtering circuit 2, the outfan connection of current rectifying and wave filtering circuit 2
Flyback circuits 3, the output connection constant current/constant voltage output circuit 4 of Flyback circuits 3,5 points of inductance compensation passive PFC circuit
It is not connected with current rectifying and wave filtering circuit 2 and Flyback circuits 3；Inductance compensation passive PFC circuit 5 include electric capacity C2, inductance L4 and
Charge/discharge circuit module.
Specifically, also including protection circuit 6, the input of protection circuit 6 is connected with constant current/constant voltage output circuit 4, protection
The outfan of circuit 6 is connected with Flyback circuits 3.
Charge/discharge circuit module includes diode D1, diode D2 and diode D3, the two ends of electric capacity C2 and rectifying and wave-filtering
The outfan of circuit 2 is in parallel, and one end of electric capacity C2 connects the common port of inductance L4 and diode D1, the other end difference of inductance L4
It is connected with one end of diode D2 and one end of diode D3, the other end of diode D2 is connected with the other end of electric capacity C2 and is followed by
Ground, the other end connection Flyback circuits 3 of diode D3.
Electric capacity C2 is CCB electric capacity, and diode D3 is fast recovery diode, and diode D2 is fly-wheel diode.
Flyback circuits 3 include transformator T1, and one end of the primary side winding of transformator T1 is connected with diode D1, and it is public
Altogether end is connected with electric capacity C3, and the other end of the primary side winding of transformator T1 is connected respectively with the drain electrode of diode D3 and metal-oxide-semiconductor Q1.
With diode D3 and metal-oxide-semiconductor Q1 as switch, circuit conversion power tube based on metal-oxide-semiconductor Q1, electric current leads to this utility model
Inductance L4, diode D3 are crossed, it is inductance L4 energy storage that metal-oxide-semiconductor Q1 forms loop, using inductance time-sharing charging and electric discharge, by electrical network energy
Amount is transferred to high-voltage energy storage capacitor, makes input average current for sine wave, and with line voltage same phase, power factor is improved
To 0.92～0.98 or so.This utility model be using inductance energy storage and exoergic realizing the conversion of electric current, inductance compensation
Ultimate principle be the principle that make use of the electric current on inductance to be mutated, by switch realize circuit system electric current size
With the change of polarity.
This utility model does not have relatively costly two-stage circuit (i.e. active PFC circuit of power factor correction), does not have
Source switch device.Power factor compensation effect is significant, power factor can reach 0.92～0.98.The harmonic content for meeting certification will
Ask, the output of low ripple current, low cost has reached the design object of High Power Factor, low ripple, high performance-price ratio.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit this utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in this utility model
Protection domain within.
Claims (5)
1. a kind of LED drive power of high-power factor, it is characterised in that：Including ac input circuit, rectifying and wave-filtering electricity
Road, Flyback circuits, constant current/constant voltage output circuit and inductance compensation passive PFC circuit, the output of the ac input circuit
The input of the end connection current rectifying and wave filtering circuit, the outfan of the current rectifying and wave filtering circuit connects the Flyback circuits, institute
The output for stating Flyback circuits connects the constant current/constant voltage output circuit, the inductance compensation passive PFC circuit respectively with institute
State current rectifying and wave filtering circuit and the connection of Flyback circuits；The inductance compensation passive PFC circuit includes electric capacity C2, inductance L4 and filling/
Discharge circuit module.
2. the LED drive power of high-power factor according to claim 1, it is characterised in that：Also include protection electricity
Road, the input of the protection circuit is connected with the constant current/constant voltage output circuit, the outfan of the protection circuit with it is described
Flyback circuits connect.
3. the LED drive power of high-power factor according to claim 1, it is characterised in that：The charge/discharge electricity
Road module includes diode D1, diode D2 and diode D3, and the two ends of the electric capacity C2 are defeated with the current rectifying and wave filtering circuit
Go out end parallel connection, one end of the electric capacity C2 connects the common port of the inductance L4 and diode D1, and the inductance L4's is another
One end is connected respectively with one end of the diode D2 and one end of the diode D3, the other end of the diode D2 and institute
It is grounded after the other end connection for stating electric capacity C2, the other end of the diode D3 connects the Flyback circuits.
4. the LED drive power of high-power factor according to claim 3, it is characterised in that：The electric capacity C2 is
CCB electric capacity, the diode D3 is fast recovery diode, and the diode D2 is fly-wheel diode.
5. the LED drive power of high-power factor according to claim 3, it is characterised in that：The Flyback is electric
Road includes transformator T1, and one end of the primary side winding of the transformator T1 is connected with the diode D1, and its common port is connected with
Electric capacity C3, the other end of the primary side winding of the transformator T1 is connected respectively with the drain electrode of the diode D3 and metal-oxide-semiconductor Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051094.6U CN206149543U (en) | 2016-09-12 | 2016-09-12 | Single -stage high power factor's LED drive power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051094.6U CN206149543U (en) | 2016-09-12 | 2016-09-12 | Single -stage high power factor's LED drive power supply |
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| Publication Number | Publication Date |
|---|---|
| CN206149543U true CN206149543U (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621051094.6U Active CN206149543U (en) | 2016-09-12 | 2016-09-12 | Single -stage high power factor's LED drive power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106304498A (en) * | 2016-09-12 | 2017-01-04 | 广东科谷电源股份有限公司 | The LED drive power of high-power factor |
-
2016
- 2016-09-12 CN CN201621051094.6U patent/CN206149543U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106304498A (en) * | 2016-09-12 | 2017-01-04 | 广东科谷电源股份有限公司 | The LED drive power of high-power factor |
| CN106304498B (en) * | 2016-09-12 | 2019-01-01 | 广东科谷电源股份有限公司 | The LED drive power of high-power factor |
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