CN106455200A - Method and circuit capable of effectively prolonging service life of LED power supply - Google Patents
Method and circuit capable of effectively prolonging service life of LED power supply Download PDFInfo
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- CN106455200A CN106455200A CN201610834668.5A CN201610834668A CN106455200A CN 106455200 A CN106455200 A CN 106455200A CN 201610834668 A CN201610834668 A CN 201610834668A CN 106455200 A CN106455200 A CN 106455200A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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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
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- 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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Abstract
The invention provides a method and a circuit capable of effectively prolonging the service life of an LED power supply. A comprehensive optimization relation model among the pulse strength, frequency and pulse width of the LED, human eye vision lighting effect and the junction temperature of the LED is established by researching the relation between the pulse current amplitude, frequency and pulse width of the LED, changing along with input AC amplitude, the human eye vision lighting effect and the junction temperature of the LED mainly, and then a pulse driving power supply circuit scheme of the LED with long service life is determined by using the relation model. The invention comprises one method and four circuit schemes, LED transient state response characteristic and human eye lag and residue visual characteristics are sufficiently utilized, and LED lighting effect, power consumption and junction temperature characteristics are taken into account, so that comprehensive optimization of energy efficiency, human eye visual effect, the LED and pulse driving power supply service life of the LED is realized, the pulse driving power supply method and circuit of the LED with low cost, high reliability, high energy efficiency and long service life are obtained, and the service life of the LED reaches more than 50000 hours.
Description
Technical field：
The invention belongs to power technique fields and in particular to be a kind of extend the LED power life-span Method and circuits.
Background technology：
LED is the forth generation light source after incandescent lamp, fluorescent lamp and high-pressure mercury lamp, is widely used in city scape in recent years
Take illumination of bright, large screen display and some special occasions (as mine, diving, military hardware) etc. into consideration.LED is that characteristic is sensitive
Semiconductor devices, has negative temperature characteristic again, thus needs to carry out steady-working state and protection to it in application process.
LED component requires strictly to driving power supply, and LED, unlike common incandescent lamp bulb, can be directly connected to the electric main of 220V,
LED is 2～3 volts of low voltage drive, and the LED of different purposes will be equipped with different driving power supplies.LED drive power is divided into
Constant-current driving power supply and pulse driving power, constant-current driving power supply LED can obtain highest light efficiency, but constant-current driving LED power supply
Design is relative complex, relatively costly；And existing AC-DC LED illumination pulse driving power is required to electrochemical capacitor, electricity
Solution electric capacity only has 5,000～10,000 hour, and LED life, up to 50,000～100,000 hour, thus leads to LED to drive
The actual life of power supply and whole LED lamp is considerably shorter than LED life, causes the wasting of resources.
Content of the invention：
It is an object of the invention to provide a kind of inexpensive, highly reliable, high energy efficiency and effective method extending the LED power life-span
And circuit.
The present invention is solved the above problems by following technological means：
A kind of effective Method and circuits extending the LED power life-span of the present invention is by studying LED pulse current amplitude, frequently
Rate and pulse width are with the relation of input AC amplitude change and human eye vision light efficiency and LED junction temperature, and difference Changing Pattern
Transient state junction temperature and the relation of average junction temperature and LED life, set up LED pulse strength, frequency and pulse width and human eye vision light
Complex optimum relational model between effect, LED junction temperature, recycles this relational model to determine long-life LED pulse driving power electricity
Road scheme.
The present invention a kind of effective extend the LED power life-span method be:
First, optimize the current pulse shape of the single-phase civil power of 50/60Hz, the brightness making the electric current by LED and LED is in
100/120Hz mechanical periodicity；
Secondly, under conditions of input is in the pulse voltage source of sinusoidal positive half-wave for 100/120Hz amplitude, determine LED electricity
Relational model 1 between stream pulse amplitude, frequency and pulse width and human eye vision light efficiency, LED junction temperature, determines relational model 1
The components and parts that the experimental circuit being adopted includes have：Pulse voltage source, controller, LED, switch S, detection resistance R, rectification D,
Inductance L, LED temperature sensor, LED luminance sensor, human eye vision light efficiency comfort level evaluator, its annexation is：
Described pulse voltage source is exported one end and is connected with controller, switch S respectively, and the pulse voltage source output other end divides
Other controller, detection resistance R connect；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Described LED luminance sensor is fixed on LED vicinity, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
3rd, under conditions of input is in the pulse current source of sinusoidal positive half-wave for 100/120Hz amplitude, determine LED electricity
Relational model 2 between stream pulse amplitude, frequency and pulse width and human eye vision light efficiency, LED junction temperature, determines relational model 2
The components and parts that the circuit diagram being adopted includes have：Pulse current source, controller, LED, LED temperature sensor, LED luminance sensing
Device, human eye vision light efficiency comfort level evaluator, its annexation is：
Described pulse current source output terminal is connected with LED two ends；
Described controller is connected with LED temperature sensor, pulse current source respectively；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Described LED luminance sensor is fixed on LED vicinity, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
4th, according to above-mentioned relation model 1 and relational model 2, determine the long-life LED arteries and veins with single-phase civil power as input source
Rush driving power supply circuit structure, have four kinds of circuit arrangements for different application occasion.
A kind of effective circuit extending the LED power life-span of the present invention has four kinds of circuit arrangements, is described below respectively：
The first circuit arrangement applies to the LED pulse driving power circuit arrangement of various power, including components and parts
Have：Wave filter over-voltage protector, rectifier filter, basic module, basic module components and parts include：Controller, switch S,
Detection resistance R, inductance L, rectification D, LED, LED temperature sensor, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
Described rectifier filter is exported one end and is connected with the controller in basic module, switch S respectively, rectifier filter
The output other end is connected with the controller in basic module, detection resistance R respectively；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Second circuit arrangement applies to the LED pulse driving power circuit with isolation voltage changing module of various power
Scheme, including components and parts have：Wave filter overvoltage protective module, rectifier filter, isolation voltage changing module, basic module, substantially
Module components and parts include：Controller, switch S, detection resistance R, inductance L, rectification D, LED, LED temperature sensor, it connects pass
It is to be：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
The output end of described rectifier filter is connected with isolation voltage changing module input；
Described isolation voltage changing module is exported one end and is connected with the controller in basic module, switch S respectively, isolates transformation
The module output other end is connected with the controller in basic module, detection resistance R respectively；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
The third circuit arrangement applies to below 100W low power inverse-excitation type LED pulse driving power circuit arrangement,
Including components and parts have：Wave filter overvoltage protective module, rectifier filter, controller, transformer T, feedback isolation, switch S, suction
Receive diode D1, rectification D2, rectification D3, detection resistance R, feedback isolation detection resistance R1, absorption resistance R2, current-limiting resistance R3,
Absorption Capacitance C1, LED, temperature detection RT, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
Described rectifier filter export one end respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, transformation
Device T input connects, and the rectifier filter output other end is connected with controller, detection resistance R respectively；
Described controller is connected with current-limiting resistance R3, detection resistance R two ends, switch S, feedback isolation respectively；
Described transformer T input respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, rectification D2, open
Close S to connect, transformer T output end is connected with rectification D3, feedback isolation detection resistance R1, feedback isolation respectively；
Described feedback isolation respectively with transformer T output end, feedback isolation detection resistance R1 two ends, LED, temperature detection
RT two ends, controller connect；
Described switch S is connected with rectification D2, current-limiting resistance R3, detection resistance R respectively；
Described absorption diode D1, absorption resistance R2, Absorption Capacitance C1 are connected in parallel rear one end connection transformer T input
End, the other end connects rectification D2；
Described rectification D2 is connected with transformer T input after being connected with switch S；
Described rectification D3 one end connection transformer T output end, the rectification D3 other end is connected with LED；
Described detection resistance R two ends connect on the controller；
After described feedback isolation detection resistance R1 two ends are connected with feedback isolation, feedback isolation detection resistance R1 one end with
LED connects, and the feedback isolation detection resistance R1 other end is connected with transformer T output end；
Described current-limiting resistance R3 one end is connected with switch S, and the current-limiting resistance R3 other end is connected with controller；
Described temperature detection RT is fixed on LED vicinity, and temperature detection RT two ends are connected with feedback isolation again；
4th kind of circuit arrangement applies to more than 100W powerful resonant mode LED pulse driving power circuit arrangement,
Including components and parts have：Wave filter overvoltage protective module, rectifier filter, controller, transformer T, feedback isolation, switch S1,
Switch S2, filtration C1, rectification D1, rectification D2, LED, detection resistance R, feedback isolation detection resistance R1, temperature detection RT, it is even
The relation of connecing is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
The output end of described rectifier filter is connected with switch S1, controller, switch S2, detection resistance R respectively；
Described controller is connected with switch S1, switch S2, detection resistance R two ends, feedback isolation circuit respectively；
Described transformer T input is connected with filtration C1, detection resistance R, controller respectively, and transformer T output end is divided
It is not connected with rectification D1, rectification D2, feedback isolation detection resistance R1, feedback isolation；
Described feedback isolation respectively with transformer T output end, feedback isolation detection resistance R1 two ends, LED, temperature detection
RT two ends, controller connect；
Described switch S1 and switch S2 is connected with filtration C1 one end after connecting again, filters the C1 other end defeated with transformer T
Enter end to connect；
Described rectification D1 and rectification D2 is connected with LED one end after connecting again；
After described feedback isolation detection resistance R1 two ends are connected with feedback isolation, feedback isolation detection resistance R1 one end with
LED connects, and the feedback isolation detection resistance R1 other end is connected with transformer T output end；
Described temperature detection RT is fixed on LED vicinity, and temperature detection RT two ends are connected with feedback isolation；
It can further be stated that the basic module described in the first circuit arrangement and second circuit arrangement can be 1 base
This module or 2-20 basic module are connected in parallel use.
The invention has the beneficial effects as follows：Make full use of that LED transient response characteristic and human eye be delayed, residual visual characteristic, examine
Consider LED light effect, the impact to the life-span of power consumption and junction temperature characteristic, study LED pulsed drive technology, control LED by rights
Pulse current amplitude, frequency and dutycycle, so as to change according to certain rules with input AC amplitude, realize energy efficiency, human eye regards
Feel effect, LED and its complex optimum in pulse driving power life-span, thus obtaining inexpensive, highly reliable, high energy efficiency and long-life
It is ensured that LED service life reaches more than 50000 hours, efficiency reaches more than 0.85 to LED pulse driving power Method and circuits,
Power factor reaches more than 0.95.
Brief description：
Fig. 1：Determine the experimental circuit of relational model 1
Fig. 2：Determine the experimental circuit of relational model 2
Fig. 3：It is applied to the LED pulse driving power circuit of various power
Fig. 4：It is applied to the LED pulse driving power circuit with isolation voltage changing module of various power
Fig. 5：It is applied to below 100W low power LED pulse driving power circuit
Fig. 6：It is applied to more than 100W high-power LED pulse driving power circuit
Specific embodiment：
Below with reference to accompanying drawing, the present invention is described in detail.
As depicted in figs. 1 and 2, a kind of effective method extending the LED power life-span is by studying LED pulse current width
Value, frequency and pulse width are with the relation of input AC amplitude change and human eye vision light efficiency and LED junction temperature, and different change rule
The transient state junction temperature of rule and the relation of average junction temperature and LED life, set up LED pulse strength, frequency and pulse width and human eye regard
Feel the complex optimum relational model between light efficiency, LED junction temperature, recycle this relational model to determine long-life LED pulsed drive electricity
Source circuit scheme, concrete grammar is:
(1) optimize the current pulse shape of the single-phase civil power of 50/60Hz, the brightness making the electric current by LED and LED is in
100/120Hz mechanical periodicity；
(2) under conditions of input is in the pulse voltage source of sinusoidal positive half-wave for 100/120Hz amplitude, determine LED current
Relational model 1 between pulse amplitude, frequency and pulse width and human eye vision light efficiency, LED junction temperature, determines relational model 1 institute
Using the components and parts that include of experimental circuit have：Pulse voltage source, controller, LED, switch S, detection resistance R, rectification D, electricity
Feel L, LED temperature sensor, LED luminance sensor, human eye vision light efficiency comfort level evaluator, its annexation is：
Described pulse voltage source is exported one end and is connected with controller, switch S respectively, and the pulse voltage source output other end divides
Other controller, detection resistance R connect；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Described LED luminance sensor is fixed on LED vicinity, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
When the electric current flowing through LED is changed with temperature, by the mistake of LED temperature sensor and the detection of detection resistance R
Difference signal and the error compensation of controller, go to control control by the change of LED temperature sensor and LED luminance sensor signal
The signal of device processed, control electric current switchs the ON time of S to controller again, and the temperature change of LED can be controlled to change with brightness,
Make to flow through LED constant current hold, by LED luminance sensor and human eye vision light efficiency comfort level evaluator, and pass through
The electric current rule of LED, realizes power supply efficiency, human eye vision light efficiency, the complex optimum of LED junction temperature.
(3) under conditions of input is in the pulse current source of sinusoidal positive half-wave for 100/120Hz amplitude, determine LED current
Relational model 2 between pulse amplitude, frequency and pulse width and human eye vision light efficiency, LED junction temperature, determines relational model 2 institute
Using the components and parts that include of circuit diagram have：Pulse current source, controller, LED, LED temperature sensor, LED luminance sensor,
Human eye vision light efficiency comfort level evaluator, its annexation is：
Described pulse current source output terminal is connected with LED two ends；
Described controller is connected with LED temperature sensor, pulse current source respectively；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Described LED luminance sensor is fixed on LED vicinity, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
Pulse current source provides the electric current needed for LED, when flowing through the electric current of LED, when temperature, brightness change, leads to
Cross LED temperature sensor, the error signal of LED luminance sensor detection enters controller and carries out error amplification, controls LED to press
According to constant electric current, temperature, Brightness Duty, by LED luminance sensor and human eye vision light efficiency comfort level evaluator, and pass through
The electric current rule of LED, realizes power supply efficiency, human eye vision light efficiency, the complex optimum of LED junction temperature；
(4) according to above-mentioned relation model 1 and relational model 2, determine the long-life LED pulse with single-phase civil power as input source
Driving power supply circuit structure, has four kinds of circuit arrangements for different application occasion.
Specifically, pulse voltage source adopt SYM5502 pulse-modulator, pulse current source adopt high-accuracy heavy-current source and
Pulse current source LL.20-20, controller adopts the NCP1251 of ON, switch S to adopt the 20N60 of ST, and current detecting R adopts constantan
Silk HOKR05-5-U, rectification D adopt the RHRP860 of ST, and inductance L adopts CREE company using 150 degree of copper cash heatproof, LED
3535, LED temperature sensor adopts high accuracy PT1000 senser element, and LED luminance sensor adopts EVERLIGHT ALS-
PD70-01C, human eye vision light efficiency comfort level evaluator is using adopting RES1300, it is possible to obtain power supply efficiency, human eye vision light
Effect, the complex optimum of LED junction temperature；
As shown in figure 3, the first circuit arrangement of circuit effectively extending the LED power life-span applies to various power
LED pulse driving power circuit arrangement, including components and parts have：Wave filter over-voltage protector, rectifier filter, basic mould
Block, basic module components and parts include：Controller, switch S, detection resistance R, inductance L, rectification D, LED, LED temperature sensor,
Its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
Described rectifier filter is exported one end and is connected with the controller in basic module, switch S respectively, rectifier filter
The output other end is connected with the controller in basic module, detection resistance R respectively；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
When the electric current flowing through LED is changed with temperature, by the mistake of LED temperature sensor and the sampling of detection resistance R
Difference signal, by the error compensation of controller, goes control electric current to switch the make-and-break time of S, the electric current to keep flow through LED is permanent
Fixed.
Specifically, wave filter overvoltage protective module adopts lightning protection to be up to the device of 10KVA it is ensured that absorbing the overvoltage of AC input
Voltage pulse, rectifier filter adopts ON company GBU810, and controller adopts the NCP1251 of ON, switch S to adopt the 20N60 of ST,
Current detecting R adopts constantan wire HOKR05-5-U, and rectification D adopts the RHRP860 of ST, and inductance L is using 150 degree of copper cash heatproof, LED
Using the 3535 of CREE company, LED temperature sensor adopts high accuracy PT1000 senser element, and basic module adopts one, can
Guarantee that LED service life reaches 60000 hours, efficiency reaches 0.9, and power factor reaches 0.96.
As shown in figure 4, the circuit second circuit arrangement effectively extending the LED power life-span applies to the band of various power
Have isolation voltage changing module LED pulse driving power circuit arrangement, including components and parts have：Wave filter overvoltage protective module, whole
Stream wave filter, isolation voltage changing module, basic module, basic module components and parts include：Controller, switch S, detection resistance R, inductance
L, rectification D, LED, LED temperature sensor, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
The output end of described rectifier filter is connected with isolation voltage changing module input；
Described isolation voltage changing module is exported one end and is connected with the controller in basic module, switch S respectively, isolates transformation
The module output other end is connected with the controller in basic module, detection resistance R respectively；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
When the electric current flowing through LED is changed with temperature, by the mistake of LED temperature sensor and the detection of detection resistance R
Difference signal, by the error compensation of controller, goes control electric current to switch the make-and-break time of S, to keep flow through the current constant of LED
Constant with temperature, isolation voltage module can be isolated with the ground of civil power it is ensured that Electrical Safety.
Specifically, wave filter overvoltage protective module adopts lightning protection to be up to the device of 10KVA it is ensured that absorbing the overvoltage of AC input
Voltage pulse, rectifier filter adopts ON company GBU810, and isolation voltage changing module adopts ON's using strong spy JAP100, controller
NCP1251, switch S adopts the 20N60 of ST, and current detecting R adopts constantan wire HOKR05-5-U, and rectification D adopts ST's
RHRP860, inductance L adopt the 3535 of CREE company using 150 degree of copper cash heatproof, LED, and LED temperature sensor is using high accuracy
PT1000 senser element, using one it can be ensured that LED service life reaches 60000 hours, efficiency reaches 0.9 to basic module, work(
Rate factor reaches 0.96.
As shown in figure 5, the third circuit arrangement of circuit effectively extending the LED power life-span applies to the little work(of below 100W
The inverse-excitation type LED pulse driving power circuit arrangement of rate, including components and parts have：Wave filter overvoltage protective module, rectifying and wave-filtering
Device, controller, transformer T, feedback isolation, switch S, absorption diode D1, rectification D2, rectification D3, detection resistance R, feedback every
From detection resistance R1, absorption resistance R2, current-limiting resistance R3, Absorption Capacitance C1, LED, temperature detection RT, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
Described rectifier filter export one end respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, transformation
Device T input connects, and the rectifier filter output other end is connected with controller, detection resistance R respectively；
Described controller is connected with current-limiting resistance R3, detection resistance R two ends, switch S, feedback isolation respectively；
Described transformer T input respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, rectification D2, open
Close S to connect, transformer T output end is connected with rectification D3, feedback isolation detection resistance R1, feedback isolation respectively；
Described feedback isolation respectively with transformer T output end, feedback isolation detection resistance R1 two ends, LED, temperature detection
RT two ends, controller connect；
Described switch S is connected with rectification D2, current-limiting resistance R3, detection resistance R respectively；
Described absorption diode D1, absorption resistance R2, Absorption Capacitance C1 are connected in parallel rear one end connection transformer T input
End, the other end connects rectification D2；
Described rectification D2 is connected with transformer T input after being connected with switch S；
Described rectification D3 one end connection transformer T output end, the rectification D3 other end is connected with LED；
Described detection resistance R two ends connect on the controller；
After described feedback isolation detection resistance R1 two ends are connected with feedback isolation, feedback isolation detection resistance R1 one end with
LED connects, and the feedback isolation detection resistance R1 other end is connected with transformer T output end；
Described current-limiting resistance R3 one end is connected with switch S, and the current-limiting resistance R3 other end is connected with controller；
Described temperature detection RT is fixed on LED vicinity, and temperature detection RT two ends are connected with feedback isolation again；
When the electric current of LED is changed with temperature, feedback is passed through by the signal of detection resistance R3 and temperature detection RT
Isolation circuit is amplified, and gives controller signal transmission, and controller removes the ON time of controlling switch S, by transformer T with
The conversion of rectification D3, makes the electric current flowing through LED keep constant with temperature.
Specifically, wave filter overvoltage protective module adopts lightning protection to be up to the device of 10KVA it is ensured that absorbing the overvoltage of AC input
Voltage pulse, rectifier filter adopts the GBU810 of ON, and controller adopts the L6599AD of ST, transformer T to adopt ER45, feedback
Isolation adopts LM358 and PC817, absorption diode D1 to adopt P6KE200A, and absorption resistance R2 adopts 100K/3W metal film electricity
Resistance, current-limiting resistance R3 adopts 0.1R/3W metalfilmresistor, and Absorption Capacitance C1 adopts 102/1KV ceramic disc capacitor, and switch S adopts ST
20N60, detection resistance R and feedback isolation detection resistance R1 all adopt the HOKR05-5-U of constantan wire, and rectification D2, rectification D3 are
Using the RHRP860 of ST, using 150 degree of copper cash heatproof, LED adopts the 3535 of CREE company to inductance L, and temperature detection RT is using high
It can be ensured that LED service life reaches 60000 hours, efficiency reaches 0.9 to precision PT1000 senser element, and power factor reaches
0.96.
As shown in fig. 6, the 4th kind of circuit arrangement of circuit effectively extending the LED power life-span applies to the big work(of more than 100W
The resonant mode LED pulse driving power circuit arrangement of rate, including components and parts have：Wave filter overvoltage protective module, rectifying and wave-filtering
Device, controller, transformer T, feedback isolation, switch S1, switch S2, filter C1, rectification D1, rectification D2, LED, detection resistance R,
Feedback isolation detection resistance R1, temperature detection RT, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, and wave filter overvoltage protective module exports
End is connected with rectifier filter input；
The output end of described rectifier filter is connected with switch S1, controller, switch S2, detection resistance R respectively；
Described controller is connected with switch S1, switch S2, detection resistance R two ends, feedback isolation circuit respectively；
Described transformer T input is connected with filtration C1, detection resistance R, controller respectively, and transformer T output end is divided
It is not connected with rectification D1, rectification D2, feedback isolation detection resistance R1, feedback isolation；
Described feedback isolation respectively with transformer T output end, feedback isolation detection resistance R1 two ends, LED, temperature detection
RT two ends, controller connect；
Described switch S1 and switch S2 is connected with filtration C1 one end after connecting again, filters the C1 other end defeated with transformer T
Enter end to connect；
Described rectification D1 and rectification D2 is connected with LED one end after connecting again；
After described feedback isolation detection resistance R1 two ends are connected with feedback isolation, feedback isolation detection resistance R1 one end with
LED connects, and the feedback isolation detection resistance R1 other end is connected with transformer T output end；
Described temperature detection RT is fixed on LED vicinity, and temperature detection RT two ends are connected with feedback isolation；
When the electric current of LED is changed with temperature, feedback is passed through by the signal of detection resistance R2 and temperature detection RT
Isolation circuit is amplified, and gives controller signal transmission, and controller removes controlling switch S1 and the ON time of switch S2, passes through
Transformer T and rectification D1, the conversion of rectification D2, make the electric current flowing through LED keep constant with temperature.
Specifically, wave filter overvoltage protective module adopts lightning protection to be up to the device of 10KVA it is ensured that absorbing the overvoltage of AC input
Voltage pulse, rectifier filter adopts the GBU810 of ON, and controller adopts the L6599AD of ST, transformer T to adopt ER39, feedback
Isolation adopts LM358 and PC817, filters C1 and adopts 2200UF/50V electric capacity, switch S1, switch S2 adopt the 20N60 of ST, detection
Resistance R and feedback isolation detection resistance R1 all adopt the HOKR05-5-U of constantan wire, and rectification D1, rectification D2 adopt ST's
RHRP860, inductance L adopt the 3535 of CREE company using 150 degree of copper cash heatproof, LED, and temperature detection RT is using high accuracy
It can be ensured that LED service life reaches 60000 hours, efficiency reaches 0.9 to PT1000 senser element, and power factor reaches 0.96.
Above content describes the main feature of the present invention.It should be understood by those skilled in the art that, the present invention is not subject to
State the restriction of embodiment, on the premise of without departing from the principle of the invention and scope, the present invention also can have various changes and modifications, this
A little changes and improvements broadly fall in scope of the claimed invention.
Claims (6)
1. a kind of effective Method and circuits extending the LED power life-span is it is characterised in that the method that effectively extends the LED power life-span
It is by studying LED pulse current amplitude, frequency and pulse width with input AC amplitude change and human eye vision light efficiency and LED junction
The relation of temperature, and the relation of the transient state junction temperature of different Changing Pattern and average junction temperature and LED life, set up LED pulse strength,
Complex optimum relational model between frequency and pulse width and human eye vision light efficiency, LED junction temperature, recycles this relational model true
Fixed length life-span LED pulse driving power circuit arrangement, concrete grammar is:
A. optimize the current pulse shape of the single-phase civil power of 50/60Hz, the brightness making electric current by LED and LED is in 100/
120Hz mechanical periodicity；
B., under conditions of input is in the pulse voltage source of sinusoidal positive half-wave for 100/120Hz amplitude, determine LED current pulse width
Relational model 1 between value, frequency and pulse width and human eye vision light efficiency, LED junction temperature, determines what relational model 1 was adopted
The components and parts that experimental circuit includes have：Pulse voltage source, controller, LED, switch S, detection resistance R, rectification D, inductance L,
LED temperature sensor, LED luminance sensor, human eye vision light efficiency comfort level evaluator, its annexation is：
Described pulse voltage source is exported one end and is connected with controller, switch S respectively, and the pulse voltage source output other end is controlled respectively
Device processed, detection resistance R connect；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor respectively；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Described LED luminance sensor is fixed on LED vicinity, and LED luminance sensor is assessed with human eye vision light efficiency comfort level
Device connects；
C., under conditions of input is in the pulse current source of sinusoidal positive half-wave for 100/120Hz amplitude, determine LED current pulse width
Relational model 2 between value, frequency and pulse width and human eye vision light efficiency, LED junction temperature, determines what relational model 2 was adopted
The components and parts that circuit diagram includes have：Pulse current source, controller, LED, LED temperature sensor, LED luminance sensor, human eye regard
Feel light efficiency comfort level evaluator, its annexation is：
Described pulse current source output terminal is connected with LED two ends；
Described controller is connected with LED temperature sensor, pulse current source respectively；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller；
Described LED luminance sensor is fixed on LED vicinity, and LED luminance sensor is assessed with human eye vision light efficiency comfort level
Device connects；
D. according to above-mentioned relation model 1 and relational model 2, determine the long-life LED pulsed drive with single-phase civil power as input source
Circuit construction of electric power, has four kinds of circuit arrangements for different application occasion.
2. a kind of effective Method and circuits extending the LED power life-span, has four kinds of circuit arrangements it is characterised in that effective extend
The first circuit arrangement of the circuit in LED power life-span applies to the LED pulse driving power circuit arrangement of various power, including
Components and parts have：Wave filter over-voltage protector, rectifier filter, basic module, basic module components and parts include：Control
Device, switch S, detection resistance R, inductance L, rectification D, LED, LED temperature sensor, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, wave filter overvoltage protective module output end and
Rectifier filter input connects；
Described rectifier filter is exported one end and is connected with the controller in basic module, switch S respectively, and rectifier filter exports
The other end is connected with the controller in basic module, detection resistance R respectively；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller.
3. a kind of effective Method and circuits extending the LED power life-span, has four kinds of circuit arrangements it is characterised in that effective extend
The LED pulse with isolation voltage changing module that the circuit second circuit arrangement in LED power life-span applies to various power is driven
Dynamic power circuit scheme, including components and parts have：Wave filter overvoltage protective module, rectifier filter, isolation voltage changing module, basic
Module, basic module components and parts include：Controller, switch S, detection resistance R, inductance L, rectification D, LED, LED temperature sensor,
Its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, wave filter overvoltage protective module output end and
Rectifier filter input connects；
The output end of described rectifier filter is connected with isolation voltage changing module input；
Described isolation voltage changing module is exported one end and is connected with the controller in basic module, switch S respectively, isolates voltage changing module
The output other end is connected with the controller in basic module, detection resistance R respectively；
Described controller is connected with switch S, detection resistance R two ends, rectification D, LED, LED temperature sensor；
Described switch S is connected with inductance L one end after being connected with rectification D again；
The described inductance L other end is connected with LED；
Described detection resistance R is connected with LED after being connected with rectification D again；
Described LED temperature sensor is fixed on LED vicinity, and LED temperature sensor is connected with controller.
4. a kind of effective Method and circuits extending the LED power life-span, has four kinds of circuit arrangements it is characterised in that effective extend
The third circuit arrangement of the circuit in LED power life-span applies to below 100W low power inverse-excitation type LED pulse driving power
Circuit arrangement, including components and parts have：Wave filter overvoltage protective module, rectifier filter, controller, transformer T, feedback every
From, switch S, absorption diode D1, rectification D2, rectification D3, detection resistance R, feedback isolation detection resistance R1, absorption resistance R2,
Current-limiting resistance R3, Absorption Capacitance C1, LED, temperature detection RT, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, wave filter overvoltage protective module output end and
Rectifier filter input connects；
Described rectifier filter export one end respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, transformer T
Input connects, and the rectifier filter output other end is connected with controller, detection resistance R respectively；
Described controller is connected with current-limiting resistance R3, detection resistance R two ends, switch S, feedback isolation respectively；
Described transformer T input respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, rectification D2, switch S
Connect, transformer T output end is connected with rectification D3, feedback isolation detection resistance R1, feedback isolation respectively；
Described feedback isolation respectively with transformer T output end, feedback isolation detection resistance R1 two ends, LED, temperature detection RT two
End, controller connect；
Described switch S is connected with rectification D2, current-limiting resistance R3, detection resistance R respectively；
Described absorption diode D1, absorption resistance R2, Absorption Capacitance C1 are connected in parallel rear one end connection transformer T input,
The other end connects rectification D2；
Described rectification D2 is connected with transformer T input after being connected with switch S；
Described rectification D3 one end connection transformer T output end, the rectification D3 other end is connected with LED；
Described detection resistance R two ends connect on the controller；
After described feedback isolation detection resistance R1 two ends are connected with feedback isolation, feedback isolation detection resistance R1 one end and LED
Connect, the feedback isolation detection resistance R1 other end is connected with transformer T output end；
Described current-limiting resistance R3 one end is connected with switch S, and the current-limiting resistance R3 other end is connected with controller；
Described temperature detection RT is fixed on LED vicinity, and temperature detection RT two ends are connected with feedback isolation again.
5. a kind of effective Method and circuits extending the LED power life-span, has four kinds of circuit arrangements it is characterised in that effective extend
The 4th kind of circuit arrangement of the circuit in LED power life-span applies to more than 100W powerful resonant mode LED pulse driving power
Circuit arrangement, including components and parts have：Wave filter overvoltage protective module, rectifier filter, controller, transformer T, feedback every
From, switch S1, switch S2, filter C1, rectification D1, rectification D2, LED, detection resistance R, feedback isolation detection resistance R1, temperature inspection
Survey RT, its annexation is：
Described wave filter overvoltage protective module input connects AC (exchange) civil power, wave filter overvoltage protective module output end and
Rectifier filter input connects；
The output end of described rectifier filter is connected with switch S1, controller, switch S2, detection resistance R respectively；
Described controller is connected with switch S1, switch S2, detection resistance R two ends, feedback isolation circuit respectively；
Described transformer T input respectively with filter C1, detection resistance R, controller are connected, transformer T output end respectively with
Rectification D1, rectification D2, feedback isolation detection resistance R1, feedback isolation connect；
Described feedback isolation respectively with transformer T output end, feedback isolation detection resistance R1 two ends, LED, temperature detection RT two
End, controller connect；
Described switch S1 and switch S2 is connected with filtration C1 one end after connecting again, filters the C1 other end and transformer T input
Connect；
Described rectification D1 and rectification D2 is connected with LED one end after connecting again；
After described feedback isolation detection resistance R1 two ends are connected with feedback isolation, feedback isolation detection resistance R1 one end and LED
Connect, the feedback isolation detection resistance R1 other end is connected with transformer T output end；
Described temperature detection RT is fixed on LED vicinity, and temperature detection RT two ends are connected with feedback isolation.
6. the Method and circuits in the effective prolongation LED power life-span according to claim 2 and claim 3, its feature exists
Can be 1 basic module in described basic module or 2-20 basic module is connected in parallel use.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616524A (en) * | 2009-07-29 | 2009-12-30 | 广州复旦奥特科技股份有限公司 | A kind of commercial LED illumination driver |
| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN102256407A (en) * | 2010-05-21 | 2011-11-23 | 王中美 | Intelligent device and method for driving LED street lamps at constant current by directly utilizing commercial power |
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2016
- 2016-09-20 CN CN201610834668.5A patent/CN106455200B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN101616524A (en) * | 2009-07-29 | 2009-12-30 | 广州复旦奥特科技股份有限公司 | A kind of commercial LED illumination driver |
| CN102256407A (en) * | 2010-05-21 | 2011-11-23 | 王中美 | Intelligent device and method for driving LED street lamps at constant current by directly utilizing commercial power |
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Effective date of registration: 20191018 Address after: 519020 302F, No.51, 1st ring road, Guishan Town, Zhuhai City, Guangdong Province Patentee after: Zhuhai intelligent Holding Group Co., Ltd Address before: 519000 Guangdong city of Zhuhai province Hengqin Baohua Road No. 6, room 105 -15085 Patentee before: Zhuhai wisdom light Technology Co., Ltd. |