CN204145795U - Have APFC function without working frequency ripple wave LED streetlamp power source - Google Patents
Have APFC function without working frequency ripple wave LED streetlamp power source Download PDFInfo
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- CN204145795U CN204145795U CN201320836848.9U CN201320836848U CN204145795U CN 204145795 U CN204145795 U CN 204145795U CN 201320836848 U CN201320836848 U CN 201320836848U CN 204145795 U CN204145795 U CN 204145795U
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Abstract
The utility model relate to have APFC function without working frequency ripple wave LED streetlamp power source, at least comprise: EMC and surge current control circuit, a rectification and filter circuit, PFC boost circuit, pwm control circuit, constant voltage output rectifier and filter, linear constant current circuit.Because prime PFC is same as original single-ended reverse exciting circuit substantially, therefore without the need to significantly revising primary circuit, after PFC boost circuit is by voltage stabilization to 400V, eliminate working frequency ripple wave by high-voltage large-capacity electrochemical capacitor.Increase linear constant current device again, overall power supply cost is significantly reduced.Relative to former single-ended reverse exciting mode circuit, add high-voltage large-capacity electrochemical capacitor after PFC boost completes, its working frequency ripple wave is eliminated.Because its structure is Non-isolation model, be different from original isolated single-ended reverse exciting mode power, its power can accomplish that 200W is even higher.Relative to LLC mode power, which reduce the DC-DC partial circuit of rear class, cost is reduced greatly.
Description
Technical field
The utility model relates to LED streetlamp power source, particularly have APFC function without working frequency ripple wave LED streetlamp power source.
Background technology
LED, as a kind of high efficiency light source of emerging development in recent years, has been widely recognized, and is applied to the fields such as family expenses, commercial lighting and industrial lighting gradually.And in industrial lighting, LED is due to its controllability, light modulation, power saving and the high feature of brightness instead of the schemes such as traditional high-pressure sodium lamp gradually.
Along with the fast development of Led, its price from original 3-4 unit be reduced to present 1 yuan even (single light source) below unitary, and the thing followed is that the price of LED drive power is without obvious decline, its cost accounts for the 1/3 even more of holistic cost, for the scope spreading to popular acceptance enabling LED real, the price of current LED drive power is faced with severe tests.
The basic framework of LED drive power is following several nothing but in the market: the first is single-ended reverse exciting pattern, by promoting its PF value without prime big capacity electrolyte capacitor, reaches PF=0.9 even higher.Which cost is lower, is typically used as in below 100W light fixture.Owing to adopting single-ended reverse exciting mode of operation, its working frequency ripple wave that operationally rear class produces cannot be resolved always.For solving its working frequency ripple wave, mostly adopt the pattern of two-step scheme and prime single-ended reverse exciting+rear class DC-DC, which can effectively solve working frequency ripple wave problem, but inevitably because the reason increasing parts causes the increase of cost.The second adopts LLC mode of operation, and it has very large market at more than 100W, moderate cost, and working frequency ripple wave is also able to effective solution, but its holistic cost still cannot meet the needs of existing market.
The utility model provides a kind of the circuit using prime PFC scheme, because prime PFC is same as original single-ended reverse exciting circuit substantially, therefore without the need to significantly revising primary circuit, after PFC boost circuit is by voltage stabilization to 400V, eliminate working frequency ripple wave by high-voltage large-capacity electrochemical capacitor.Increase linear constant current device again, overall power supply cost is significantly reduced.Relative to former single-ended reverse exciting mode circuit, add high-voltage large-capacity electrochemical capacitor after PFC boost completes, its working frequency ripple wave is eliminated.Because its structure is Non-isolation model, be different from original isolated single-ended reverse exciting mode power, its power can accomplish that 200W is even higher.Relative to LLC mode power, which reduce the DC-DC partial circuit of rear class, cost is reduced greatly.
Utility model content
The purpose of this utility model is to provide a kind of high-power, low cost, high reliability, have APFC function without working frequency ripple wave LED street lamp driving power.
The purpose of this utility model realizes like this, have APFC function without working frequency ripple wave LED streetlamp power source, at least comprise: EMC and surge current control circuit, a rectification and filter circuit, PFC boost circuit, pwm control circuit, constant voltage output rectifier and filter, linear constant current circuit, is characterized in that: AC220V input is by entering a rectification and filter circuit input after EMC and surge current control circuit; The output of surge current control circuit is electrically connected with the input of PFC boost circuit through a rectification and filter circuit; Described PFC boost circuit includes boost inductance T2, and it has two groups of windings; One group of winding is serially connected in a rectification and between filter circuit output and constant voltage output rectifier and filter input; Another one end, road ground connection, the other end directly divides two-way, and resistance R7 of leading up to draws two branch roads, and a branch road is to the voltage-stabiliser tube voltage stabilizing end with linear constant current circuit, and another branch road is to SA6561 the 1st pin of pwm control circuit; Boost inductance T2 divides separately lead up to resistance R14, the diode D2 of two-way to divide two branch roads; First branch road is electrically connected with SA6561 the 8th pin; Second branch road passes through two resistance R5, R4 of serial connection to a rectification and filter circuit output; SA6561 the 8th pin is connected to electrochemical capacitor C8 over the ground simultaneously; Linear constant current circuit is connected with the electrode of LED array.
Described pwm control circuit comprises and is connected in series resistance R1, R2, R3, comprises SA6561 control circuit, MOS switching tube G; R1, R2, R3 are connected in series, and the R1 other end is electrically connected with a rectification and filter circuit output; Resistance R3 other end ground connection; The electric connection point of resistance R3 and resistance R2 is electrically connected with SA6561 control circuit the 3rd pin, and the 3rd pin is electrically connected with the anode of electrochemical capacitor C5, the negativing ending grounding of C5; 1st pin and the 2nd pin of SA6561 meet electric capacity C6; The 6th pin ground connection of SA6561, the 4th pin and the electrical connection of the 5th pin, and be electrically connected with the source electrode of resistance R8 one end, MOS switching tube G, the grid of MOS switching tube G is electrically connected by the 7th pin of resistance R6 and SA6561.
Described constant voltage output rectifier and filter includes diode BYV26C and electrochemical capacitor C9, the parameter of electrochemical capacitor C9 is 450V/22uF, the positive pole of diode BYV26C connects one end winding of PFC boost circuit, electrochemical capacitor 450V/22uF, to the smoothing filtering of the voltage after diode rectification after PFC boost circuit, reduces working frequency ripple wave.
Described linear constant current circuit is made up of multiple constant current circuit, and every road constant-current circuit includes linear constant current device LC1984 and current regulating resistance and voltage-stabiliser tube, and first left LC1984, R9, D5 form the first via; N number of LC1984, R10, D6 form N road on the right; Voltage-stabiliser tube and LC1984 parallel connection, current regulating resistance electrical connection LC1984; Voltage-stabiliser tube D5, D6 adopt 1N4747; Be connected in series in the single channel of LED array by linear constant current circuit, LC1984 carries out current constant control to single-string LED; Voltage change signal simultaneously above voltage-stabiliser tube feeds back to pwm control circuit the 1st pin, and pwm control circuit, by the Correctional tube G in the 7th foot control PFC boost circuit, makes the voltage required for transformer T2 output.
The utility model has the advantages that: because the utility model introduces linear constant current circuit, not only current constant control is carried out to LED array by linear constant current circuit, also by the change of itself upper voltage, output voltage is maintained in the required scope of LED array.This circuit due to constant current part control change, make constant current constant voltage control complete by means of only three devices, tremendous range decrease cost.Simultaneously due to the APFC function of this circuit, make to which overcome and make the drawbacks such as the color of LED lamplight easily changes because of the factor such as input voltage, ambient temperature, power factor reaches more than 0.9, THD can accomplish less than 20%, life-span can reach more than 50000 hours, also can complete the dimming function from 100% to 1% simultaneously.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model embodiment circuit diagram.
In figure: 1, AC220V input; 2, EMC and surge current control circuit; 3, a rectification and filter circuit; 4, PFC boost circuit; 5, pwm control circuit; 6, constant voltage output rectifier and filter; 7, linear constant current circuit; 8, LED array.
Embodiment
As shown in Figure 1, have APFC function without working frequency ripple wave LED streetlamp power source, at least comprise: EMC and surge current control circuit 2, rectification and filter circuit 3, PFC boost circuit 4, pwm control circuit 5, constant voltage output rectifier and filter 6, linear constant current circuit 7, is characterized in that: AC220V input 1 is by entering a rectification and filter circuit 3 input after EMC and surge current control circuit 2; The output of surge current control circuit 2 is electrically connected with the input of PFC boost circuit 4 through a rectification and filter circuit 3; Described PFC boost circuit 4 includes boost inductance T2, and it has two groups of windings; One group of winding is serially connected in a rectification and between filter circuit 3 output and constant voltage output rectifier and filter 6 input; Another one end, road ground connection, the other end directly divides two-way, and resistance R7 of leading up to draws two branch roads, and a branch road is to the voltage-stabiliser tube voltage stabilizing end with linear constant current circuit 7, and another branch road is to SA6561 the 1st pin of pwm control circuit 5; Boost inductance T2 divides separately lead up to resistance R14, the diode D2 of two-way to divide two branch roads; First branch road is electrically connected with SA6561 the 8th pin; Second branch road passes through two resistance R5, R4 of serial connection to a rectification and filter circuit 3 output; SA6561 the 8th pin is connected to electrochemical capacitor C8 over the ground simultaneously; Linear constant current circuit 7 is connected with the electrode of LED array 8.
During work, pwm control circuit 5 is by being converted to high frequency voltage to the conducting of pipe G after MOS switch by the low-frequency voltage of a rectification and filter circuit 3; The SA6561 controller that another group is pwm control circuit 5 provides the electric current and voltage that can maintain needed for its work.
By linear constant current circuit 7, the utility model detects that the change of its voltage controls the electric current that LED array 8 flows through and remains unchanged, voltage sample detection signal is connected with between linear constant current circuit 7 and pwm control circuit 5, when setting signal exceed in linear constant current circuit 7 upper in limited time, by the internal switch turn-on frequency controlling pwm control circuit 5, the output voltage of PFC boost circuit 3 is regulated, reach the object exporting constant voltage.
Described pwm control circuit 5 makes wide dynamic range circuit, and it comprises and is connected in series resistance R1, R2, R3, comprises SA6561 control circuit, MOS switching tube G; R1, R2, R3 are connected in series, and the R1 other end is electrically connected with a rectification and filter circuit 3 output; Resistance R3 other end ground connection; The electric connection point of resistance R3 and resistance R2 is electrically connected with SA6561 control circuit the 3rd pin, and the 3rd pin is electrically connected with the anode of electrochemical capacitor C5, the negativing ending grounding of C5; 1st pin and the 2nd pin of SA6561 meet electric capacity C6; The 6th pin ground connection of SA6561, the 4th pin and the electrical connection of the 5th pin, and be electrically connected with the source electrode of resistance R8 one end, MOS switching tube G, the grid of MOS switching tube G is electrically connected by the 7th pin of resistance R6 and SA6561.
Described constant voltage output rectifier and filter 6 includes diode BYV26C and electrochemical capacitor C9, the parameter of electrochemical capacitor C9 is 450V/22uF, the positive pole of diode BYV26C connects one end winding of PFC boost circuit 4, electrochemical capacitor 450V/22uF, to the smoothing filtering of voltage after diode rectification after PFC boost circuit 4, reduces working frequency ripple wave.
Described linear constant current circuit 7 is made up of multiple constant current circuit, and every road constant-current circuit includes linear constant current device LC1984 and current regulating resistance and voltage-stabiliser tube, and first left LC1984, R9, D5 form the first via; N number of LC1984, R10, D6 form N road on the right; Voltage-stabiliser tube and LC1984 parallel connection, current regulating resistance electrical connection LC1984.Voltage-stabiliser tube (D5, D6) adopts 1N4747; Be connected in series in the single channel of LED array 8 by linear constant current circuit 7, LC1984 carries out current constant control to single-string LED.Voltage change signal simultaneously above voltage-stabiliser tube feeds back to pwm control circuit 5 the 1st pin, and pwm control circuit 5, by the Correctional tube G in the 7th foot control PFC boost circuit 4, makes the voltage required for transformer T2 output.
Because SA6561 is integrated circuit, there is reliable performance.Therefore, effectively can ensure that the electric current of supply load LED array and voltage stabilization are in the set point needed.
AC220V input 1 is by entering a rectification and filter circuit 3 input after EMC and surge current control circuit 2; The output of surge current control circuit 2 is electrically connected with the input of PFC boost circuit 4 through a rectification and filter circuit 3; Because surge current control circuit 2 and a rectification and filter circuit 3 belong to the technology mostly belonging to circuit and adopt, therefore, do not do refinement explanation.
The parts that the present embodiment does not describe in detail, structure and circuit belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (3)
1. have APFC function without working frequency ripple wave LED streetlamp power source, at least comprise: EMC and surge current control circuit, a rectification and filter circuit, PFC boost circuit, pwm control circuit, constant voltage output rectifier and filter, linear constant current circuit, is characterized in that: AC220V input is by entering a rectification and filter circuit input after EMC and surge current control circuit; The output of surge current control circuit is electrically connected with the input of PFC boost circuit through a rectification and filter circuit; Described PFC boost circuit includes boost inductance T2, and it has two groups of windings; One group of winding is serially connected in a rectification and between filter circuit output and constant voltage output rectifier and filter input; Another one end, road ground connection, the other end directly divides two-way, and resistance R7 of leading up to draws two branch roads, and a branch road is to the voltage-stabiliser tube voltage stabilizing end with linear constant current circuit, and another branch road is to SA6561 the 1st pin of pwm control circuit; Boost inductance T2 divides separately lead up to resistance R14, the diode D2 of two-way to divide two branch roads; First branch road is electrically connected with SA6561 the 8th pin; Second branch road passes through two resistance R5, R4 of serial connection to a rectification and filter circuit output; SA6561 the 8th pin is connected to electrochemical capacitor C8 over the ground simultaneously; Linear constant current circuit is connected with the electrode of LED array; Described pwm control circuit comprises and is connected in series resistance R1, R2, R3, comprises SA6561 control circuit, MOS switching tube G; R1, R2, R3 are connected in series, and the R1 other end is electrically connected with a rectification and filter circuit output; Resistance R3 other end ground connection; The electric connection point of resistance R3 and resistance R2 is electrically connected with SA6561 control circuit the 3rd pin, and the 3rd pin is electrically connected with the anode of electrochemical capacitor C5, the negativing ending grounding of C5; 1st pin and the 2nd pin of SA6561 meet electric capacity C6; The 6th pin ground connection of SA6561, the 4th pin and the electrical connection of the 5th pin, and be electrically connected with the source electrode of resistance R8 one end, MOS switching tube G, the grid of MOS switching tube G is electrically connected by the 7th pin of resistance R6 and SA6561.
2. according to claim 1 have APFC function without working frequency ripple wave LED streetlamp power source, it is characterized in that: described constant voltage output rectifier and filter includes diode BYV26C and electrochemical capacitor C9, the parameter of electrochemical capacitor C9 is 450V/22uF, the positive pole of diode BYV26C connects one end winding of PFC boost circuit, electrochemical capacitor 450V/22uF, to the smoothing filtering of the voltage after diode rectification after PFC boost circuit, reduces working frequency ripple wave.
3. according to claim 1 have APFC function without working frequency ripple wave LED streetlamp power source, it is characterized in that: described linear constant current circuit is made up of multiple constant current circuit, every road constant-current circuit includes linear constant current device LC1984 and current regulating resistance and voltage-stabiliser tube, and first left LC1984, R9, D5 form the first via; N number of LC1984, R10, D6 form N road on the right; Voltage-stabiliser tube and LC1984 parallel connection, current regulating resistance electrical connection LC1984; Voltage-stabiliser tube D5, D6 adopt 1N4747; Be connected in series in the single channel of LED array by linear constant current circuit, LC1984 carries out current constant control to single-string LED; Voltage change signal simultaneously above voltage-stabiliser tube feeds back to pwm control circuit the 1st pin, and pwm control circuit, by the Correctional tube G in the 7th foot control PFC boost circuit, makes the voltage required for transformer T2 output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836848.9U CN204145795U (en) | 2013-12-18 | 2013-12-18 | Have APFC function without working frequency ripple wave LED streetlamp power source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320836848.9U CN204145795U (en) | 2013-12-18 | 2013-12-18 | Have APFC function without working frequency ripple wave LED streetlamp power source |
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| CN204145795U true CN204145795U (en) | 2015-02-04 |
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| CN201320836848.9U Expired - Fee Related CN204145795U (en) | 2013-12-18 | 2013-12-18 | Have APFC function without working frequency ripple wave LED streetlamp power source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993689A (en) * | 2015-07-11 | 2015-10-21 | 深圳创智慧能电子科技有限公司 | Boost no-DC-magnetic-bias and no-electrolytic-capacitor APFC circuit |
| CN106793342A (en) * | 2017-02-15 | 2017-05-31 | 江南大学 | A kind of long-life LED drive power based on ripple compensation |
| CN108513407A (en) * | 2018-05-04 | 2018-09-07 | 深圳市必易微电子有限公司 | A kind of low-frequency ripple suppression circuit and control method |
-
2013
- 2013-12-18 CN CN201320836848.9U patent/CN204145795U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993689A (en) * | 2015-07-11 | 2015-10-21 | 深圳创智慧能电子科技有限公司 | Boost no-DC-magnetic-bias and no-electrolytic-capacitor APFC circuit |
| CN104993689B (en) * | 2015-07-11 | 2017-09-22 | 深圳创智慧能电子科技有限公司 | The APFC circuits of Boost non DC bias no electrolytic capacitors |
| CN106793342A (en) * | 2017-02-15 | 2017-05-31 | 江南大学 | A kind of long-life LED drive power based on ripple compensation |
| CN108513407A (en) * | 2018-05-04 | 2018-09-07 | 深圳市必易微电子有限公司 | A kind of low-frequency ripple suppression circuit and control method |
| CN108513407B (en) * | 2018-05-04 | 2024-05-07 | 深圳市必易微电子股份有限公司 | Low-frequency ripple suppression circuit and control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20161218 |