CN106455200B - A kind of effective method and circuit for extending the LED power service life - Google Patents
A kind of effective method and circuit for extending the LED power service life Download PDFInfo
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- CN106455200B CN106455200B CN201610834668.5A CN201610834668A CN106455200B CN 106455200 B CN106455200 B CN 106455200B CN 201610834668 A CN201610834668 A CN 201610834668A CN 106455200 B CN106455200 B CN 106455200B
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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 present invention provides a kind of effective methods and circuit for extending the LED power service life, mainly by studying LED pulse current amplitudes, frequency and pulse width with the variation of input AC amplitudes and human eye vision light efficiency and the relationship of LED junction temperature, the complex optimum relational model between LED pulse strengties, frequency and pulse width and human eye vision light efficiency, LED junction temperature is established, this relational model is recycled to determine long-life LED pulse driving power circuit arrangement.The present invention includes a kind of method and four kinds of circuit arrangements, LED transient response characteristics are made full use of to be lagged with human eye, residual visual characteristic, consider LED light effect, power consumption and junction temperature characteristic, realize energy efficiency, human eye vision effect, LED and its complex optimum in pulse driving power service life, it obtains inexpensive, highly reliable, high energy efficiency and long-life LED pulse driving power method and circuit, LED life reaches 50000 hours or more.
Description
Technical field：
The invention belongs to power technique fields, and in particular to be it is a kind of extend the LED power service life method and circuit.
Background technology：
LED is the forth generation light source after incandescent lamp, fluorescent lamp and high-pressure sodium lamp, is widely used in city scape in recent years
Take the illumination of bright, large screen display and some special occasions (such as mine, diving, military hardware) into consideration.LED is characteristic sensitivity
Semiconductor devices, and there is negative temperature characteristic, thus need to carry out steady-working state and protection to it in application process.
LED component requires strictly driving power, and LED can be directly connected to the electric main of 220V unlike common incandescent lamp bulb,
LED is 2~3 volts of low voltage drive, and the LED light of different purposes will be equipped with different driving powers.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 that relative complex, cost is higher；And existing AC-DC LED illumination is required to electrolytic capacitor with pulse driving power, electricity
Solution capacitance only has 5,000~10,000 hour, and thus LED life caused LED to drive up to 50,000~100,000 hours
The actual life of power supply and entire LED lamp is considerably shorter than LED life, results in waste of resources.
Invention content：
Extend the object of the present invention is to provide a kind of inexpensive, highly reliable, high energy efficiency and effectively the method in LED power service life
And circuit.
The present invention is solved the above problems by following technological means：
A kind of effective method for extending the LED power service life of the present invention and circuit are by studying LED pulse current amplitudes, frequency
Rate and pulse width are with the variation of input AC amplitudes and human eye vision light efficiency and the relationship of LED junction temperature, and difference changing rule
Transient state junction temperature and average junction temperature and the relationship of LED life, establish LED pulse strengties, 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 it is a kind of it is effective extend the LED power service life method be:
First, the current pulse shape for optimizing the single-phase alternating currents of 50/60Hz, makes the brightness of electric current and LED by LED be in
100/120Hz mechanical periodicities；
Secondly, under conditions of input is the pulse voltage source that 100/120Hz amplitudes are in sinusoidal positive half-wave, LED electricity is determined
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 component that used experimental circuit includes has：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, connection relation are：
The pulse voltage source exports one end and is connect respectively with controller, switch S, and pulse voltage source exports the other end point
Other controller, detection resistance R connections；
The controller is connect with switch S, the both ends detection resistance R, rectification D, LED, LED temperature sensor；
The switch S is connect with the one end inductance L again after being connect with rectification D；
The inductance L other ends are connect with LED；
The detection resistance R is connect with LED again after being connect with rectification D；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The LED luminance sensor is fixed on the vicinity LED, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
Third determines LED electricity under conditions of input is the pulse current source that 100/120Hz amplitudes are in sinusoidal positive half-wave
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 component that used circuit diagram includes has：Pulse current source, controller, LED, LED temperature sensor, LED luminance sensing
Device, human eye vision light efficiency comfort level evaluator, connection relation are：
The pulse current source output terminal is connect with the both ends LED；
The controller is connect with LED temperature sensor, pulse current source respectively；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The LED luminance sensor is fixed on the vicinity LED, 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 using single-phase alternating current as the long-life LED arteries and veins of input source
Driving power circuit structure is rushed, there are four types of circuit arrangements for different application occasion.
There are four types of circuit arrangements for a kind of effective circuit for extending the LED power service life of the present invention, are described below respectively：
The first circuit arrangement is the LED pulse driving power circuit arrangements suitable for various power, including component
Have：Filter over-voltage protector, rectifier filter, basic module, basic module component include：Controller, switch S,
Detection resistance R, inductance L, rectification D, LED, LED temperature sensor, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The rectifier filter exports one end and is connect respectively with controller, the switch S in basic module, rectifier filter
The output other end is connect with controller, the detection resistance R in basic module respectively；
The controller is connect with switch S, the both ends detection resistance R, rectification D, LED, LED temperature sensor；
The switch S is connect with the one end inductance L again after being connect with rectification D；
The inductance L other ends are connect with LED；
The detection resistance R is connect with LED again after being connect with rectification D；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
Second of circuit arrangement is the LED pulse driving power circuits with isolation voltage changing module suitable for various power
Scheme, including component have：Filter overvoltage protective module, rectifier filter, isolation voltage changing module, basic module, substantially
Module component includes：Controller, switch S, detection resistance R, inductance L, rectification D, LED, LED temperature sensor, connection are closed
System is：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The output end of the rectifier filter is connected with voltage changing module input terminal is isolated；
The isolation voltage changing module exports one end and is connect respectively with controller, the switch S in basic module, and transformation is isolated
The module output other end is connect with controller, the detection resistance R in basic module respectively；
The controller is connect with switch S, the both ends detection resistance R, rectification D, LED, LED temperature sensor；
The switch S is connect with the one end inductance L again after being connect with rectification D；
The inductance L other ends are connect with LED；
The detection resistance R is connect with LED again after being connect with rectification D；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The third circuit arrangement is to be suitable for the low power inverse-excitation type LED pulse driving power circuit arrangements of 100W or less,
Including component have：Filter overvoltage protective module, controller, transformer T, feedback isolation, switch S, is inhaled rectifier filter
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, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The rectifier filter export one end respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, transformation
Device T input terminals connect, and the rectifier filter output other end is connect with controller, detection resistance R respectively；
The controller is connect with current-limiting resistance R3, the both ends detection resistance R, switch S, feedback isolation respectively；
The transformer T input terminals respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, rectification D2, open
S connections are closed, transformer T output ends are connect with rectification D3, feedback isolation detection resistance R1, feedback isolation respectively；
The feedback isolation respectively with transformer T output ends, the both ends feedback isolation detection resistance R1, LED, temperature detection
The both ends RT, controller connection；
The switch S is connect with rectification D2, current-limiting resistance R3, detection resistance R respectively；
The absorption diode D1, absorption resistance R2, Absorption Capacitance C1 are connected in parallel rear one end connection transformer T inputs
End, the other end connect rectification D2；
The rectification D2 is connect after being connect with switch S with transformer T input terminals；
Described one end rectification D3 connects transformer T output ends, and the rectification D3 other ends are connect with LED；
The both ends the detection resistance R connection is on the controller；
After the both ends feedback isolation detection resistance R1 are connect with feedback isolation, feedback isolation one end detection resistance R1 with
LED connections, the feedback isolation detection resistance R1 other ends are connect with transformer T output ends；
Described one end current-limiting resistance R3 is connect with switch S, and the current-limiting resistance R3 other ends are connect with controller；
The temperature detection RT is fixed on the vicinity LED, and the both ends temperature detection RT are connect with feedback isolation again；
4th kind of circuit arrangement is to be suitable for the powerful resonant mode LED pulse driving power circuit arrangements of 100W or more,
Including component have：Filter overvoltage protective module, rectifier filter, controller, transformer T, feedback isolation, switch S1,
Switch S2, filtering C1, rectification D1, rectification D2, LED, detection resistance R, feedback isolation detection resistance R1, temperature detection RT, connect
The relationship of connecing is：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The output end of the rectifier filter is connect with switch S1, controller, switch S2, detection resistance R respectively；
The controller is connect with switch S1, switch S2, the both ends detection resistance R, feedback isolation circuit respectively；
The transformer T input terminals are connect with filtering C1, detection resistance R, controller respectively, transformer T output ends point
It is not connect with rectification D1, rectification D2, feedback isolation detection resistance R1, feedback isolation；
The feedback isolation respectively with transformer T output ends, the both ends feedback isolation detection resistance R1, LED, temperature detection
The both ends RT, controller connection；
It is connect again with the one end filtering C1 after the switch S1 and switch S2 connections, filters the C1 other ends and transformer T is defeated
Enter end connection；
It is connect again with the one end LED after the rectification D1 and rectification D2 connections；
After the both ends feedback isolation detection resistance R1 are connect with feedback isolation, feedback isolation one end detection resistance R1 with
LED connections, the feedback isolation detection resistance R1 other ends are connect with transformer T output ends；
The temperature detection RT is fixed on the vicinity LED, and the both ends temperature detection RT are connect with feedback isolation；
It should be noted that the basic module described in the first circuit arrangement and second of circuit arrangement can be 1 base
This module can also be that 2-20 basic module is connected in parallel use.
The beneficial effects of the invention are as follows：It makes full use of LED transient response characteristics to be lagged with human eye, residual visual characteristic, examines
Consider LED light effect, the influence of power consumption and junction temperature characteristic to the service life, studies LED pulsed drive technologies, control LED in the right way
Pulse current amplitude, frequency and duty ratio make it change according to certain rules with input AC amplitudes, realize that energy efficiency, human eye regard
Effect, LED and its complex optimum in pulse driving power service life are felt, to obtain inexpensive, highly reliable, high energy efficiency and long-life
LED pulse driving powers method and circuit, it is ensured that LED service lifes reach 50000 hours or more, and efficiency reaches 0.85 or more,
Power factor reaches 0.95 or more.
Description of the drawings：
Fig. 1：Determine the experimental circuit of relational model 1
Fig. 2：Determine the experimental circuit of relational model 2
Fig. 3：LED pulse driving power circuits suitable for various power
Fig. 4：The LED pulse driving power circuits with isolation voltage changing module suitable for various power
Fig. 5：Suitable for the low power LED pulse driving powers circuits of 100W or less
Fig. 6：Suitable for 100W or more high-power LED pulse driving power circuits
Specific implementation mode：
Below with reference to attached drawing, the present invention is described in detail.
As depicted in figs. 1 and 2, a kind of effective method for extending the LED power service life is by studying LED pulse current width
Value, frequency and pulse width are with the variation of input AC amplitudes and human eye vision light efficiency and the relationship of LED junction temperature, and different variation rule
The transient state junction temperature of rule and average junction temperature and the relationship of LED life, establish LED pulse strengties, frequency and pulse width and human eye regard
Feel the complex optimum relational model between light efficiency, LED junction temperature, this relational model is recycled to determine long-life LED pulsed drive electricity
Source circuit scheme, specific method are:
(1) current pulse shape for optimizing the single-phase alternating currents of 50/60Hz, makes the brightness of electric current and LED by LED be in
100/120Hz mechanical periodicities；
(2) under conditions of input is the pulse voltage source that 100/120Hz amplitudes are in sinusoidal positive half-wave, LED current is determined
Relational model 1 between pulse amplitude, frequency and pulse width and human eye vision light efficiency, LED junction temperature determines 1 institute of relational model
The component that the experimental circuit of use includes has：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, connection relation is：
The pulse voltage source exports one end and is connect respectively with controller, switch S, and pulse voltage source exports the other end point
Other controller, detection resistance R connections；
The controller is connect with switch S, the both ends detection resistance R, rectification D, LED, LED temperature sensor；
The switch S is connect with the one end inductance L again after being connect with rectification D；
The inductance L other ends are connect with LED；
The detection resistance R is connect with LED again after being connect with rectification D；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The LED luminance sensor is fixed on the vicinity LED, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
When the electric current for flowing through LED changes with temperature, pass through the mistake of LED temperature sensor and detection resistance R detections
The error compensation of difference signal and controller goes control to control by the variation of LED temperature sensor and LED luminance sensor signal
The signal of device processed, controller control the turn-on time of current switch S again, can control the temperature change and brightness change of LED light,
Make to flow through LED light 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, realize power supply efficiency, human eye vision light efficiency, LED junction temperature complex optimum.
(3) under conditions of input is the pulse current source that 100/120Hz amplitudes are in sinusoidal positive half-wave, LED current is determined
Relational model 2 between pulse amplitude, frequency and pulse width and human eye vision light efficiency, LED junction temperature determines 2 institute of relational model
The component that the circuit diagram of use includes has：Pulse current source, controller, LED, LED temperature sensor, LED luminance sensor,
Human eye vision light efficiency comfort level evaluator, connection relation are：
The pulse current source output terminal is connect with the both ends LED；
The controller is connect with LED temperature sensor, pulse current source respectively；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The LED luminance sensor is fixed on the vicinity LED, LED luminance sensor and human eye vision light efficiency comfort level
Evaluator connects；
Pulse current source provides the electric current needed for LED, when flow through the electric current of LED light, temperature, brightness change when, lead to
Cross LED temperature sensor, LED luminance sensor detection error signal enter controller carry out error amplification, control LED light 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, realize power supply efficiency, human eye vision light efficiency, LED junction temperature complex optimum；
(4) it according to above-mentioned relation model 1 and relational model 2, determines using single-phase alternating current as the long-life LED pulse of input source
Driving power circuit structure, for different application occasion, there are four types of circuit arrangements.
Specifically, pulse voltage source uses SYM5502 pulse-modulators, pulse current source using high-accuracy heavy-current source and
Pulse current source LL.20-20, controller use the NCP1251 of ON, switch S that the 20N60 of ST, current detecting R is used to use constantan
Silk HOKR05-5-U, rectification D use the RHRP860 of ST, inductance L to use 150 degree of copper wire heatproof, and LED is using CREE companies
3535, LED temperature sensor uses high-precision PT1000 senser elements, LED luminance sensor to use EVERLIGHT ALS-
PD70-01C, human eye vision light efficiency comfort level evaluator use RES1300, can obtain power supply efficiency, human eye vision light
The complex optimum of effect, LED junction temperature；
As shown in figure 3, effectively the first circuit arrangement of the circuit in extension LED power service life is suitable for various power
LED pulse driving power circuit arrangements, including component have：Filter over-voltage protector, rectifier filter, basic mould
Block, basic module component include：Controller, switch S, detection resistance R, inductance L, rectification D, LED, LED temperature sensor,
Its connection relation is：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The rectifier filter exports one end and is connect respectively with controller, the switch S in basic module, rectifier filter
The output other end is connect with controller, the detection resistance R in basic module respectively；
The controller is connect with switch S, the both ends detection resistance R, rectification D, LED, LED temperature sensor；
The switch S is connect with the one end inductance L again after being connect with rectification D；
The inductance L other ends are connect with LED；
The detection resistance R is connect with LED again after being connect with rectification D；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
When the electric current for flowing through LED changes with temperature, pass through the mistake of LED temperature sensor and detection resistance R samplings
Difference signal removes the make-and-break time of control current switch S by the error compensation of controller, to keep flow through the electric current perseverance of LED
It is fixed.
Specifically, filter overvoltage protective module is up to the device of 10KVA using lightning protection, ensure the overvoltage for absorbing AC input
Voltage pulse, rectifier filter use ON companies GBU810, controller that the NCP1251 of ON, switch S is used to use the 20N60 of ST,
Current detecting R uses constantan wire HOKR05-5-U, rectification D that the RHRP860 of ST, inductance L is used to use 150 degree of copper wire heatproof, LED
Using the 3535 of CREE companies, LED temperature sensor uses high-precision PT1000 senser elements, basic module to use one, can
Ensure that LED service lifes reach 60000 hours, efficiency reaches 0.9, and power factor reaches 0.96.
As shown in figure 4, second of the circuit arrangement of circuit for effectively extending the LED power service life is the band suitable for various power
Have isolation voltage changing module LED pulse driving power circuit arrangements, including component have：It is filter overvoltage protective module, whole
Filter, isolation voltage changing module, basic module are flowed, basic module component includes：Controller, switch S, detection resistance R, inductance
L, rectification D, LED, LED temperature sensor, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The output end of the rectifier filter is connected with voltage changing module input terminal is isolated；
The isolation voltage changing module exports one end and is connect respectively with controller, the switch S in basic module, and transformation is isolated
The module output other end is connect with controller, the detection resistance R in basic module respectively；
The controller is connect with switch S, the both ends detection resistance R, rectification D, LED, LED temperature sensor；
The switch S is connect with the one end inductance L again after being connect with rectification D；
The inductance L other ends are connect with LED；
The detection resistance R is connect with LED again after being connect with rectification D；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
When the electric current for flowing through LED changes with temperature, pass through the mistake of LED temperature sensor and detection resistance R detections
Difference signal removes the make-and-break time of control current switch S by the error compensation of controller, constant come the electric current that keeps flow through LED
Constant with temperature, isolation voltage module can be isolated with the ground of alternating current, ensure Electrical Safety.
Specifically, filter overvoltage protective module is up to the device of 10KVA using lightning protection, ensure the overvoltage for absorbing AC input
Voltage pulse, rectifier filter use ON companies GBU810, and isolation voltage changing module is using spy JAP100 is good for, and controller is using ON's
NCP1251, switch S use the 20N60 of ST, current detecting R to use constantan wire HOKR05-5-U, and rectification D is using ST's
RHRP860, inductance L use 150 degree of copper wire heatproof, LED to use the 3535 of CREE companies, and LED temperature sensor is using high-precision
PT1000 senser elements, basic module use one, it can be ensured that LED service lifes reach 60000 hours, and efficiency reaches 0.9, work(
Rate factor reaches 0.96.
As shown in figure 5, effectively the third circuit arrangement of the circuit in extension LED power service life is to be suitable for the small work(of 100W or less
The inverse-excitation type LED pulse driving power circuit arrangements of rate, including component have：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, connection relation is：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The rectifier filter export one end respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, transformation
Device T input terminals connect, and the rectifier filter output other end is connect with controller, detection resistance R respectively；
The controller is connect with current-limiting resistance R3, the both ends detection resistance R, switch S, feedback isolation respectively；
The transformer T input terminals respectively with absorption diode D1, absorption resistance R2, Absorption Capacitance C1, rectification D2, open
S connections are closed, transformer T output ends are connect with rectification D3, feedback isolation detection resistance R1, feedback isolation respectively；
The feedback isolation respectively with transformer T output ends, the both ends feedback isolation detection resistance R1, LED, temperature detection
The both ends RT, controller connection；
The switch S is connect with rectification D2, current-limiting resistance R3, detection resistance R respectively；
The absorption diode D1, absorption resistance R2, Absorption Capacitance C1 are connected in parallel rear one end connection transformer T inputs
End, the other end connect rectification D2；
The rectification D2 is connect after being connect with switch S with transformer T input terminals；
Described one end rectification D3 connects transformer T output ends, and the rectification D3 other ends are connect with LED；
The both ends the detection resistance R connection is on the controller；
After the both ends feedback isolation detection resistance R1 are connect with feedback isolation, feedback isolation one end detection resistance R1 with
LED connections, the feedback isolation detection resistance R1 other ends are connect with transformer T output ends；
Described one end current-limiting resistance R3 is connect with switch S, and the current-limiting resistance R3 other ends are connect with controller；
The temperature detection RT is fixed on the vicinity LED, and the both ends temperature detection RT are connect with feedback isolation again；
When the electric current of LED and temperature change, feedback is passed through by the signal of detection resistance R3 and temperature detection RT
Isolation circuit is amplified, and controller is given signal transmission, and controller removes the turn-on time of control switch S, by transformer T and
The conversion of rectification D3 makes the electric current for flowing through LED be kept constant with temperature.
Specifically, filter overvoltage protective module is up to the device of 10KVA using lightning protection, ensure the overvoltage for absorbing AC input
Voltage pulse, rectifier filter use the GBU810 of ON, controller that the L6599AD of ST, transformer T is used to use ER45, feedback
Isolation uses LM358 and PC817, absorption diode D1 to use P6KE200A, and absorption resistance R2 is using 100K/3W metal film electricity
Resistance, current-limiting resistance R3 use 0.1R/3W metalfilmresistors, Absorption Capacitance C1 that 102/1KV ceramic disc capacitors, switch S is used to use ST
20N60, detection resistance R and feedback isolation detection resistance R1 all use constantan wire HOKR05-5-U, rectification D2, rectification D3 are
150 degree of copper wire heatproof, LED is used to use the 3535 of CREE companies using the RHRP860 of ST, inductance L, temperature detection RT is using high
Precision PT1000 senser elements, it can be ensured that LED service lifes reach 60000 hours, and efficiency reaches 0.9, and power factor reaches
0.96。
As shown in fig. 6, the 4th kind of circuit arrangement of circuit for effectively extending the LED power service life is to be suitable for the big work(of 100W or more
The resonant mode LED pulse driving power circuit arrangements of rate, including component have：Filter overvoltage protective module, rectifying and wave-filtering
Device, controller, transformer T, feedback isolation, switch S1, switch S2, filtering C1, rectification D1, rectification D2, LED, detection resistance R,
Feedback isolation detection resistance R1, temperature detection RT, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, the output of filter overvoltage protective module
End is connect with rectifier filter input terminal；
The output end of the rectifier filter is connect with switch S1, controller, switch S2, detection resistance R respectively；
The controller is connect with switch S1, switch S2, the both ends detection resistance R, feedback isolation circuit respectively；
The transformer T input terminals are connect with filtering C1, detection resistance R, controller respectively, transformer T output ends point
It is not connect with rectification D1, rectification D2, feedback isolation detection resistance R1, feedback isolation；
The feedback isolation respectively with transformer T output ends, the both ends feedback isolation detection resistance R1, LED, temperature detection
The both ends RT, controller connection；
It is connect again with the one end filtering C1 after the switch S1 and switch S2 connections, filters the C1 other ends and transformer T is defeated
Enter end connection；
It is connect again with the one end LED after the rectification D1 and rectification D2 connections；
After the both ends feedback isolation detection resistance R1 are connect with feedback isolation, feedback isolation one end detection resistance R1 with
LED connections, the feedback isolation detection resistance R1 other ends are connect with transformer T output ends；
The temperature detection RT is fixed on the vicinity LED, and the both ends temperature detection RT are connect with feedback isolation；
When the electric current of LED and temperature change, feedback is passed through by the signal of detection resistance R2 and temperature detection RT
Isolation circuit is amplified, and gives controller, controller to remove the turn-on time of control switch S1 and switch S2, pass through signal transmission
The conversion of transformer T and rectification D1, rectification D2 make the electric current for flowing through LED be kept constant with temperature.
Specifically, filter overvoltage protective module is up to the device of 10KVA using lightning protection, ensure the overvoltage for absorbing AC input
Voltage pulse, rectifier filter use the GBU810 of ON, controller that the L6599AD of ST, transformer T is used to use ER39, feedback
Isolation uses LM358 and PC817, filtering C1 that 2200UF/50V capacitances, switch S1, switch S2 is used to use the 20N60 of ST, detection
Resistance R and feedback isolation detection resistance R1 uses the HOKR05-5-U of constantan wire, rectification D1, rectification D2 to use ST's
RHRP860, inductance L use 150 degree of copper wire heatproof, LED to use the 3535 of CREE companies, and temperature detection RT is using high-precision
PT1000 senser elements, it can be ensured that LED service lifes reach 60000 hours, and efficiency reaches 0.9, and power factor reaches 0.96.
The 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 by upper
The limitation for stating embodiment, under the premise of not departing from the principle of the invention and range, the present invention can also have various changes and modifications, this
A little changes and improvements belong in scope of the claimed invention.
Claims (3)
1. a kind of effective method for extending the LED power service life, which is characterized in that the method for effectively extending the LED power service life is logical
Research LED pulse current amplitudes, frequency and pulse width are crossed with the variation of input AC amplitudes and human eye vision light efficiency and LED junction temperature
Relationship,
And the relationship of the transient state junction temperature and average junction temperature and LED life of different changing rules, establish LED pulse strengties, frequency
And the complex optimum relational model between pulse width and human eye vision light efficiency, LED junction temperature, recycle this relational model to determine length
Service life LED pulse driving power circuit arrangement, specific method are：
A. the current pulse shape for optimizing the single-phase alternating currents of 50/60Hz, it is in 100/ to make the brightness by the electric current and LED of LED
120Hz mechanical periodicities；
B. under conditions of input is the pulse voltage source that 100/120Hz amplitudes are in sinusoidal positive half-wave, LED current pulse width is determined
Relational model 1 between value, frequency and pulse width and human eye vision light efficiency, LED junction temperature, used by determining relational model 1
The component that experimental circuit includes has：Pulse voltage source, controller, LED, switch S, detection resistance R, rectifier diode D, inductance
L, LED temperature sensor, LED luminance sensor and human eye vision light efficiency comfort level evaluator, connection relation are：
The pulse voltage source exports one end and is connect respectively with the first end of controller and switch S, and pulse voltage source output is another
One end is connect with the first end of controller and detection resistance R respectively；
The controller respectively with the first end of switch S, the both ends detection resistance R, the anode of rectifier diode D, LED cathode
It is connected with LED temperature sensor；
The second end of the switch S is connect with the cathode of rectifier diode D, the second end of the switch S also with inductance L
One end connects；
The anode connection of the inductance L second ends and LED；
The second end of the detection resistance R is connect with the anode of rectifier diode D, and the second end of the detection resistance R is also
It is connect with the cathode of LED；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The LED luminance sensor is fixed on the vicinity LED, and LED luminance sensor is assessed with human eye vision light efficiency comfort level
Device connects；
C. under conditions of input is the pulse current source that 100/120Hz amplitudes are in sinusoidal positive half-wave, LED current pulse width is determined
Relational model 2 between value, frequency and pulse width and human eye vision light efficiency, LED junction temperature, used by determining relational model 2
The component that circuit diagram includes has：Pulse current source, controller, LED, LED temperature sensor, LED luminance sensor and human eye
Vision light efficiency comfort level evaluator, connection relation are：
The pulse current source output terminal is connect with the both ends LED；
The controller is connect with LED temperature sensor, pulse current source respectively；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
The LED luminance sensor is fixed on the vicinity LED, and LED luminance sensor is assessed with human eye vision light efficiency comfort level
Device connects；
D. it according to above-mentioned relation model 1 and relational model 2, determines using single-phase alternating current as the long-life LED pulsed drive of input source
Circuit construction of electric power, for different application occasion, there are four types of circuit arrangements；
Effectively the first circuit arrangement of the circuit in extension LED power service life is the LED pulse driving powers suitable for various power
Circuit arrangement, including component have：Filter over-voltage protector, rectifier filter, basic module, basic module component
Include：Controller, switch S, detection resistance R, inductance L, rectifier diode D, LED and LED temperature sensor, connection relation
For：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, filter overvoltage protective module output end and
Rectifier filter input terminal connects；
The rectifier filter exports one end and is connect respectively with the first end of controller and switch S in basic module, rectification
The filter output other end is connect with the first end of controller and detection resistance R in basic module respectively；
The first end of the controller and switch S, the both ends detection resistance R, the anode of rectifier diode D, LED cathode and
LED temperature sensor connects；
The second end of the switch S is connect with the cathode of rectifier diode D, the second end of the switch S also with inductance L
One end connects；
The anode connection of the inductance L second ends and LED；
The second end of the detection resistance R is connect with the anode of rectifier diode D, and the second end of the detection resistance R is also
It is connect with the cathode of LED；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
Second of the circuit arrangement of circuit for effectively extending the LED power service life is suitable for various power with isolation voltage changing module
LED pulse driving power circuit arrangements, including component have：Filter overvoltage protective module, rectifier filter, isolation become
Die block, basic module, basic module component include：Controller, switch S, detection resistance R, inductance L, rectifier diode D,
LED and LED temperature sensor, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, filter overvoltage protective module output end and
Rectifier filter input terminal connects；
The output end of the rectifier filter is connected with voltage changing module input terminal is isolated；
The isolation voltage changing module exports one end and is connect respectively with the first end of controller and switch S in basic module, every
It is connect respectively with the first end of controller and detection resistance R in basic module from the voltage changing module output other end；
The first end of the controller and switch S, the both ends detection resistance R, the anode of rectifier diode D, LED cathode and
LED temperature sensor connects；
The second end of the switch S is connect with the cathode of rectifier diode D, the second end of the switch S also with inductance L
One end connects；
The anode connection of the inductance L second ends and LED；
The second end of the detection resistance R is connect with the anode of rectifier diode D, and the second end of the detection resistance R is also
It is connect with the cathode of LED；
The LED temperature sensor is fixed on the vicinity LED, and LED temperature sensor is connect with controller；
Effectively the third circuit arrangement of the circuit in extension LED power service life is to be suitable for the low power inverse-excitation type LED of 100W or less
Pulse driving power circuit arrangement, including component have：Filter overvoltage protective module, rectifier filter, controller, transformation
Device T, feedback isolation, switch S, absorption diode D1, rectifier diode D2, rectifier diode D3, detection resistance R, feedback isolation
Detection resistance R1, absorption resistance R2, current-limiting resistance R3, Absorption Capacitance C1, LED and temperature detection RT, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, filter overvoltage protective module output end and
Rectifier filter input terminal connects；
The rectifier filter export one end respectively with the anode of absorption diode D1, absorption resistance R2 first end, absorb
The first end of capacitance C1 is connected with transformer T input terminals, rectifier filter export the other end respectively with controller and detection resistance R
Second end connection；
The controller respectively with the first end of current-limiting resistance R3, the both ends detection resistance R, switch S second end and feedback every
From connection；
The transformer T input terminals respectively with the anode of absorption diode D1, the first end of absorption resistance R2, Absorption Capacitance C1
First end, rectifier diode D2 anode connected with the first end of switch S, transformer T output ends respectively with rectifier diode
The anode of D3, the first end of feedback isolation detection resistance R1 are connected with feedback isolation；
The feedback isolation is examined with transformer T output ends, the both ends feedback isolation detection resistance R1, the cathode of LED, temperature respectively
The both ends RT are surveyed to connect with controller；
The anode of the first end of the switch S and rectifier diode D2 are connect, the second end of the switch S respectively with current limliting
The second end of resistance R3 is connected with the first end of detection resistance R；
The absorption diode D1, absorption resistance R2, Absorption Capacitance C1 are connected in parallel, the anode of the absorption diode D1,
The first end of the absorption resistance R2 and the first end of the Absorption Capacitance C1 are connected to transformer T input terminals, the absorption
The second end of the cathode of diode D1, the second end of the absorption resistance R2 and the Absorption Capacitance C1 is connected to two pole of rectification
The cathode of pipe D2；
The anode of the rectifier diode D2 is connect with the first end of switch S, and the anode of the rectifier diode D2 is also and transformation
Device T input terminals connect；
The anode connection transformer T output ends of the rectifier diode D3, the cathode of rectifier diode D3 and the anode of LED are even
It connects；
The both ends the detection resistance R connection is on the controller；
The both ends feedback isolation detection resistance R1 are connect with feedback isolation, the second end of feedback isolation detection resistance R1 with
The cathode of LED connects, and feedback isolation detection resistance R1 first ends are connect with transformer T output ends；
The current-limiting resistance R3 second ends are connect with the second end of switch S, and current-limiting resistance R3 first ends are connect with controller；
The temperature detection RT is fixed on the vicinity LED, and the both ends temperature detection RT are connect with feedback isolation again；
The 4th kind of circuit arrangement of circuit for effectively extending the LED power service life is to be suitable for the powerful resonant mode LED of 100W or more
Pulse driving power circuit arrangement, including component have：Filter overvoltage protective module, rectifier filter, controller, transformation
Device T, feedback isolation, switch S1, switch S2, filter capacitor C1, rectifier diode D1, rectifier diode D2, LED, detection resistance
R, feedback isolation detection resistance R1 and temperature detection RT, connection relation are：
The filter overvoltage protective module input terminal connects AC (exchange) alternating current, filter overvoltage protective module output end and
Rectifier filter input terminal connects；
The output end of the rectifier filter is electric with the first end of switch S1, controller, the second end of switch S2, detection respectively
Hinder the second end connection of R；
The controller respectively with the second end of switch S1, the both ends of switch S2, the both ends detection resistance R and feedback isolation circuit
Connection；
The transformer T input terminals connect with the second end of filter capacitor C1, the first end of detection resistance R and controller respectively
Connect, transformer T output ends respectively with the anode of rectifier diode D1, the anode of rectifier diode D2, feedback isolation detection resistance
The first end of R1 is connected with feedback isolation；
The feedback isolation is examined with transformer T output ends, the both ends feedback isolation detection resistance R1, the cathode of LED, temperature respectively
The both ends RT are surveyed to connect with controller；
The second end of the switch S1 is connected with the first end of switch S2, the second end of the switch S1 also with filter capacitor
The first end of C1 connects, and filter capacitor C1 second ends are connect with transformer T input terminals；
The cathode of the rectifier diode D1 is connected with the cathode of rectifier diode D2, the cathode of the rectifier diode D1
Also it is connect with the anode of LED；
The both ends feedback isolation detection resistance R1 are connect with feedback isolation, the second end of feedback isolation detection resistance R1 with
The cathode of LED connects, and feedback isolation detection resistance R1 first ends are connect with transformer T output ends；
The temperature detection RT is fixed on the vicinity LED, and the both ends temperature detection RT are connect with feedback isolation.
2. effective method for extending the LED power service life according to claim 1, which is characterized in that the basic module
It is 1 basic module.
3. effective method for extending the LED power service life according to claim 1, which is characterized in that the basic module
It is that 2-20 basic module is connected in parallel use.
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| CN201610428727 | 2016-06-15 | ||
| CN2016104287279 | 2016-06-15 |
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| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN101616524B (en) * | 2009-07-29 | 2012-11-28 | 广州复旦奥特科技股份有限公司 | 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. |