CN102088813A - High-power LED (light-emitting diode) phase-control constant-current drive circuit - Google Patents
High-power LED (light-emitting diode) phase-control constant-current drive circuit Download PDFInfo
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- CN102088813A CN102088813A CN2011100693586A CN201110069358A CN102088813A CN 102088813 A CN102088813 A CN 102088813A CN 2011100693586 A CN2011100693586 A CN 2011100693586A CN 201110069358 A CN201110069358 A CN 201110069358A CN 102088813 A CN102088813 A CN 102088813A
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to a high-power LED (light-emitting diode) phase-control constant-current drive circuit. The drive circuit is characterized in that mains supply input in one way is output to a high-power LED circuit module for power supply via a phase-control rectifier module, and mains supply input in the other way is isolated by an isolation transformer and then is taken as input of a synchronous signal and a regulated power supply of a synchronous phase-shift circuit; a direct current (DC) detection module detects the output of the high-power LED circuit, and an output signal of the circuit is taken as a feedback signal of a regulating circuit; the output of the regulated power supply is connected with a preset circuit module; the output of a preset circuit is taken as a preset signal of the regulating circuit; the output of the regulating circuit is connected with the synchronous phase-shift circuit; and the output of a phase-control rectifier circuit is adjusted by means of the output of the synchronous phase-shift circuit, thus achieving the purpose of constant-current drive for the high-power LED circuit. The drive circuit has the advantages of novel control strategy and high intellectualization degree, thus having greater development prospect in application fields such as a high-power LED lamp and a large LED display screen.
Description
Technical field
The present invention relates to a kind of phased constant current high-power LED drive circuit, be applicable to high-power LED lamp and big screen LED display screen.
Background technology
Existing high-power LED drive circuit all is to adopt complex circuit, and the high Switching Power Supply of cost is as drive circuit.Because LED operating ambient temperature height, the device of Switching Power Supply are aging easily, the fault height, the LED product is low in implementation reliability in service, the spoilage height.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of phased constant current high-power LED drive circuit, this circuit relatively changes a silicon controlled angle of flow by total current and set-point on the measurement LED path, reaches the purpose that constant current provides the great power LED electric current.
The present invention realizes like this, a kind of phased constant current high-power LED drive circuit, comprise the phase control rectifier module, great power LED circuit module, the simultaneous phase-shifting module, the regulating circuit module, the direct current detection module, power module of voltage regulation and given circuit module, it is characterized in that: civil power is imported one the tunnel and is exported to great power LED circuit module for power supply through the phase control rectifier module, another road after isolating transformer is isolated as the input of the synchronizing signal and the stabilized voltage power supply of synchronization phase-shifted circuit, the direct current detection module detects the output of great power LED circuit, its output signal is as the feedback signal of regulating circuit, stabilized voltage power supply output connects the given circuit module, given circuit output is as the given signal of regulating circuit, regulating circuit output connects synchronization phase-shifted circuit, the output of phase control rectifier circuit is adjusted in synchronization phase-shifted circuit output, thereby reaches the purpose of great power LED circuit constant-current driving.
The module phase control rectifier adopts single silicon controlled phased bridge rectifier, reaches the purpose of output constant-current driving great power LED by the control silicon controlled angle of flow.
The terminal voltage of C, E by changing triode Q1 in the synchronization phase-shifted circuit is adjusted and is singly connect transistor input circuit charge constant, thereby changes the moment of the output of unijunction transistor, and then the control silicon controlled angle of flow.
The DC circuit detection module adopts CS005LX current type Hall element.
Control strategy novelty of the present invention, intelligent degree height has bigger development prospect in the application of high-power LED lamp and big screen LED display screen.
Description of drawings
Fig. 1 is the theory diagram of the embodiment of the invention.
Fig. 2 is the physical circuit figure of the embodiment of the invention.
Embodiment
As shown in Figure 1, a kind of phased constant current high-power LED drive circuit, comprise the phase control rectifier module, great power LED circuit module, the simultaneous phase-shifting module, the regulating circuit module, the direct current detection module, power module of voltage regulation and given circuit module, it is characterized in that: civil power is imported one the tunnel and is exported to great power LED circuit module for power supply through the phase control rectifier module, another road after isolating transformer is isolated as the input of the synchronizing signal and the stabilized voltage power supply of synchronization phase-shifted circuit, the direct current detection module detects the output of great power LED circuit, its output signal is as the feedback signal of regulating circuit, stabilized voltage power supply output connects the given circuit module, given circuit output is as the given signal of regulating circuit, regulating circuit output connects synchronization phase-shifted circuit, the output of phase control rectifier circuit is adjusted in synchronization phase-shifted circuit output, thereby reaches the purpose of great power LED circuit constant-current driving.
The module phase control rectifier adopts single silicon controlled phased bridge rectifier, reaches the purpose of output constant-current driving great power LED by the control silicon controlled angle of flow.
The terminal voltage of C, E by changing triode Q1 in the synchronization phase-shifted circuit is adjusted and is singly connect transistor input circuit charge constant, thereby changes the moment of the output of unijunction transistor, and then the control silicon controlled angle of flow.
The DC circuit detection module adopts CS005LX current type Hall element.
The specific embodiment of circuit is referring to Fig. 2:
Single-phase 220V alternating current is as the input of single silicon controlled control bridge rectifier, its output voltage
Wherein be the silicon controlled angle of flow, output circuit connects the great power LED circuit.Single-phase alternating current output meets isolating transformer T, isolating transformer negative terminal one tunnel connects behind the bridge rectifier input as three terminal regulator LM7812, the power supply of voltage stabilizing circuit output+12V is as the dc power supply of Hall element, simultaneously, by divider resistance R16, R17, the R18 output dividing potential drop to stabilized voltage power supply, its output is as the given signal of PID regulating circuit; Current mode Hall element CS005LX detects the variation of total current on the LED path, and as the feedback signal of PID regulating circuit, the output of PID regulating circuit is as the feedback signal of synchronization phase-shifted circuit.Another road of isolating transformer output negative terminal meets diode D1, carries out slicing by pressurizer D9, D10 again after the halfwave rectifier, thereby obtains trapezoidal wave voltage, and the zero crossing of its zero crossing and supply voltage is synchronous.The conducting voltage of PID regulating circuit output control signal control triode Q1, the control trapezoidal wave is by R12 and 3 chargings of equivalent variable resistive conductor road direction capacitor C, when charging voltage reaches the crest voltage of unijunction transistor Q2, the unijunction transistor conducting, capacitor C 3 triggers the conducting of thyristor D11 by the R15 discharge.
Owing to trigger phase shifting angle
Size determine by the charging interval.When in a certain charging interval internal trigger pulse, then by formula
* MERGEFORMAT as can be known,
Little, output voltage increases; Otherwise, when in the longest charging interval, exporting trigger impulse,
Greatly, output voltage increases little.By
As can be known, choose the suitable minimum angle of flow and maximum conduction angle and can determine minimum charging interval and maximum charge time respectively;
It is relevant with charging capacitor that circuit discharges and recharges in time constant and the circuit charging resistor as can be known, generally chooses suitable charging capacitor earlier, and electric capacity is chosen the too for a short time error that is easy to generate usually.The minimum charging interval, the maximum charge time was by R12 and the decision of R14 series resistance by resistance R 12 decisions.
More than be preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention when the function that is produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (4)
1. phased constant current high-power LED drive circuit, comprise the phase control rectifier module, great power LED circuit module, the simultaneous phase-shifting module, the regulating circuit module, the direct current detection module, power module of voltage regulation and given circuit module, it is characterized in that: civil power is imported one the tunnel and is exported to great power LED circuit module for power supply through the phase control rectifier module, another road after isolating transformer is isolated as the input of the synchronizing signal and the stabilized voltage power supply of synchronization phase-shifted circuit, the direct current detection module detects the output of great power LED circuit, its output signal is as the feedback signal of regulating circuit, stabilized voltage power supply output connects the given circuit module, given circuit output is as the given signal of regulating circuit, regulating circuit output connects synchronization phase-shifted circuit, the output of phase control rectifier circuit is adjusted in synchronization phase-shifted circuit output, thereby reaches the purpose of great power LED circuit constant-current driving.
2. a kind of phased constant current high-power LED drive circuit according to claim 1, it is characterized in that: the module phase control rectifier adopts single silicon controlled phased bridge rectifier, reaches the purpose of output constant-current driving great power LED by the control silicon controlled angle of flow.
3. a kind of phased constant current high-power LED drive circuit according to claim 1, it is characterized in that: the terminal voltage of C, E by changing triode Q1 in the synchronization phase-shifted circuit is adjusted and is singly connect transistor input circuit charge constant, thereby change the moment of the output of unijunction transistor, and then the control silicon controlled angle of flow.
4. a kind of phased constant current high-power LED drive circuit according to claim 1 is characterized in that: the DC circuit detection module adopts CS005LX current type Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100693586A CN102088813B (en) | 2011-03-22 | 2011-03-22 | High-power LED (light-emitting diode) phase-control constant-current drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100693586A CN102088813B (en) | 2011-03-22 | 2011-03-22 | High-power LED (light-emitting diode) phase-control constant-current drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102088813A true CN102088813A (en) | 2011-06-08 |
| CN102088813B CN102088813B (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100693586A Expired - Fee Related CN102088813B (en) | 2011-03-22 | 2011-03-22 | High-power LED (light-emitting diode) phase-control constant-current drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438365A (en) * | 2011-10-20 | 2012-05-02 | 常州大学 | Program-controlled SCR (silicon controlled rectifier) high-power LED (light-emitting diode) high-efficiency power supply circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102904A (en) * | 1985-04-19 | 1986-12-31 | 刘湘 | Microthyristor circuit and device |
| CN2349603Y (en) * | 1998-06-10 | 1999-11-17 | 王丽华 | Consatnt current apparatus with large power output |
| CN1818819A (en) * | 2006-01-05 | 2006-08-16 | 大连大学 | Current source controller with external load power supply |
| JP2007035403A (en) * | 2005-07-26 | 2007-02-08 | Matsushita Electric Works Ltd | D.c. power supply device for light emitting diode and luminaire using it |
| CN201986233U (en) * | 2011-03-22 | 2011-09-21 | 福建农林大学 | Phase-controlled constant-current and high-power LED (light-emitting diode) driving circuit |
-
2011
- 2011-03-22 CN CN2011100693586A patent/CN102088813B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102904A (en) * | 1985-04-19 | 1986-12-31 | 刘湘 | Microthyristor circuit and device |
| CN2349603Y (en) * | 1998-06-10 | 1999-11-17 | 王丽华 | Consatnt current apparatus with large power output |
| JP2007035403A (en) * | 2005-07-26 | 2007-02-08 | Matsushita Electric Works Ltd | D.c. power supply device for light emitting diode and luminaire using it |
| CN1818819A (en) * | 2006-01-05 | 2006-08-16 | 大连大学 | Current source controller with external load power supply |
| CN201986233U (en) * | 2011-03-22 | 2011-09-21 | 福建农林大学 | Phase-controlled constant-current and high-power LED (light-emitting diode) driving circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438365A (en) * | 2011-10-20 | 2012-05-02 | 常州大学 | Program-controlled SCR (silicon controlled rectifier) high-power LED (light-emitting diode) high-efficiency power supply circuit |
| CN102438365B (en) * | 2011-10-20 | 2014-02-05 | 常州大学 | Program-controlled SCR (silicon controlled rectifier) high-power LED (light-emitting diode) high-efficiency power supply circuit |
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| Publication number | Publication date |
|---|---|
| CN102088813B (en) | 2013-07-24 |
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