CN109451639A - A kind of efficient direct current fluorescent lamp and efficient direct current fluorescent-lamp-use adaptive transformation device - Google Patents
A kind of efficient direct current fluorescent lamp and efficient direct current fluorescent-lamp-use adaptive transformation device Download PDFInfo
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- CN109451639A CN109451639A CN201811153960.6A CN201811153960A CN109451639A CN 109451639 A CN109451639 A CN 109451639A CN 201811153960 A CN201811153960 A CN 201811153960A CN 109451639 A CN109451639 A CN 109451639A
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
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- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
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Abstract
The present invention is suitable for DC fluorescent lamp field, provide a kind of efficient direct current fluorescent-lamp-use adaptive transformation device, the adaptive transformation device includes invariable power voltage current transformation unit and LC filtering starter unit, and the invariable power voltage current transformation unit is connected with LC filtering starter unit；The conversion and control that the invariable power voltage current transformation unit is used to open or close invariable power voltage current transformation unit according to the control signal of the switch control unit of efficient direct current fluorescent lamp works, and carries out the invariable power conversion and control of voltage and current to the output direct current of the rectifying and wave-filtering list of efficient direct current fluorescent lamp according to the state of the DC fluorescent lamp tube of efficient direct current fluorescent lamp；LC filters starter unit and is used to carry out rectifying and wave-filtering according to the output voltage of invariable power voltage current transformation unit, and provides starting voltage and stabling current to the DC fluorescent lamp tube.
Description
Technical field
The invention belongs to DC fluorescent lamp field more particularly to a kind of efficient direct current fluorescent-lamp-use adaptive transformation devices.
Background technique
Existing technology all carries out decompression current limliting, therefore the electric current flowed through when low city's voltage with the capacitive reactance of capacitance resistance ware substantially
Very little lamp just can not work normally；Fluorescent tube electrophoresis suppression circuit is generally all pressed down with the linear stabilized current characteristic of transistor
System, so that the voltage drop on transistor is larger and fever is more serious, it is lower so as to cause the luminous efficiency of fluorescent lamp.
Summary of the invention
The present invention provides a kind of efficient direct current fluorescent-lamp-use adaptive transformation device, it is intended to solve existing DC fluorescent lamp and shine
Efficiency it is lower and can not wide scope power supply the problem of.
The invention is realized in this way a kind of efficient direct current fluorescent-lamp-use adaptive transformation device, the adaptive transformation device
Starter unit, the invariable power voltage current transformation unit and LC filtering are filtered including invariable power voltage current transformation unit and LC
The connection of starter unit；
The invariable power voltage current transformation unit is used for the control of the switch control unit according to efficient direct current fluorescent lamp
Signal opens or closes the conversion and control work of invariable power voltage current transformation unit, and according to the straight of efficient direct current fluorescent lamp
The state for flowing fluorescent tube carries out the permanent function of voltage and current to the output direct current of the rectification filtering unit of efficient direct current fluorescent lamp
Rate conversion and control；
LC filters starter unit and is used to carry out rectifying and wave-filtering according to the output voltage of invariable power voltage current transformation unit, and
Starting voltage and stabling current are provided to the DC fluorescent lamp tube.
Further, invariable power voltage current transformation unit include PWM control module, it is the first feedback isolation module, second anti-
Present isolation module, voltage changing module and switching tube；
PWM control module is connect with the first feedback isolation module and switching tube respectively, the second feedback isolation module and LC filter
The connection of wave starter unit, voltage changing module are connect with switching tube and LC filtering starter unit respectively.
Further, it includes LC current rectifying and wave filtering circuit and multiplication of voltage starting circuit, LC current rectifying and wave filtering circuit that LC, which filters starter unit,
It is connected with multiplication of voltage starting circuit；
LC current rectifying and wave filtering circuit is for being rectified and being put down to the pulsating current that invariable power voltage current transformation unit exports
DC fluorescent lamp tube is supplied after sliding filtering；
Multiplication of voltage starting circuit is used for when invariable power voltage current transformation unit starts output signal, is believed current output
Number carry out multiplication of voltage output to start DC fluorescent lamp tube.
Further, LC current rectifying and wave filtering circuit includes the first rectifier diode, the first inductor rectifier and the first commutation capacitor and
First dead resistance, multiplication of voltage starting circuit include the first starter diode, the first starting capacitor and the first starter resistance, the change
One end of die block is separately connected the anode of the first rectifier diode and one end of the first starting capacitor, the first rectifier diode
Cathode be separately connected one end of the first commutation capacitor, one end of the first dead resistance, the first starter diode anode and second
The other end of one end of feedback isolation module, the other end of the first commutation capacitor and the first dead resistance is grounded, the first starter
The other end of capacitor connects one end of the first starter resistance, and the other end of the first starter resistance is separately connected the first inductor rectifier
The other end of the cathode of one end and the first starter diode, the first inductor rectifier connects DC fluorescent lamp tube.
Further, PWM control module includes control chip, the first control resistance, the second control resistance, third control electricity
Resistance, the 4th control resistance, the 5th control resistance, the 6th control resistance, the 7th control resistance, the 8th control resistance, the 9th control
Resistance, the first control capacitor, the second control capacitor, third capacitor and the first control diode, one end of the first control resistance connect
The output direct current of the rectification filtering unit of DC fluorescent lamp is connect, other end connection the second control resistance of the first control resistance
One end, the end VIN of the other end connection control chip of the second control resistance, first control signal are separately connected the 8th control
One end of one end of resistance and the 9th control resistance, the other end ground connection of the 8th control resistance, the 9th controls the another of resistance
The first conversion voltage at the end RT of one end connection control chip U5, the accessory power supply of DC fluorescent lamp is separately connected the first control electricity
The vdd terminal of one end of appearance, one end of the second control capacitor and control chip, the other end of the first control capacitor and the second control electricity
The other end of appearance is grounded, and the end GATE for controlling chip is separately connected the cathode of the first control diode and third controls resistance
One end, first control diode anode be separately connected third control resistance the other end, the 4th control resistance one end and open
The control terminal of pipe is closed, the control terminal of switching tube and the 4th control the other end of the one end of resistance respectively with third control resistance and connect
It connects, the end SENSE of control chip U5 is separately connected the other end of the 4th control resistance, one end of the 7th control resistance and switching tube
First end, the 7th control resistance the other end ground connection, control chip U5 the end RI be separately connected the 5th control resistance one end
Signal is controlled with the other end connection third of one end of the 6th control resistance, the 5th control resistance, the 6th controls the another of resistance
End ground connection, the end FB of control chip U5 are separately connected one end and the first feedback isolation module of third capacitor, third capacitor it is another
One end ground connection.
Further, the first feedback isolation module includes the first feedback resistance, the output section of isolation optocoupler and the second feedback electricity
Resistance, second control signal are connected with one end of the first feedback resistance, and the other end of the first feedback resistance is separately connected isolation optocoupler
One end of output section, one end of the second feedback resistance and control chip the end FB, the other end of the output section of isolation optocoupler and
The other end of second feedback resistance is grounded.
Further, the second feedback isolation module include the 4th zener diode, third feedback resistance, the 4th feedback resistance and
The input unit of isolation optocoupler；4th zener diode one end connection LC filter starter unit, the 4th zener diode it is another
End connected with one end of third feedback resistance, the other end of third feedback resistance be separately connected the 4th feedback resistance one end and every
The other end of one end of the input unit from optocoupler, the input unit of the other end and isolation optocoupler of the 4th feedback resistance is grounded.
Further, the voltage changing module includes that the second transformer and third control capacitor, wherein third controls the one of capacitor
End is connect with the second end of one end of the primary coil of the second transformer and switching tube respectively, the primary coil of the second transformer
The other end connects the output direct current of rectification filtering unit, and one end of third control capacitor is separately connected the secondary of the second transformer
One end of coil and LC filter starter unit, the other end ground connection of the secondary coil of the second transformer.
The present invention also provides a kind of efficient direct current fluorescent lamps of embodiment, the adaptive transformation device including above-described embodiment.
Efficient direct current fluorescent-lamp-use adaptive transformation device of the invention is used by invariable power voltage current transformation unit and is opened
Pattern conversion control is closed, the supply voltage of alternating current can be made to guarantee the stabilization of output in wide scope variation, while LC filters starter
Starting voltage is provided when unit exports can be improved the transfer efficiency after fluorescent tube starts to DC fluorescent lamp tube, and can press down
The electrophoresis of DC fluorescent lamp tube processed makes DC fluorescent lamp tube stable operation.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of embodiment of efficient direct current fluorescent lamp provided by the invention.
Fig. 2 is the structural block diagram of efficient direct current fluorescent lamp another kind embodiment provided by the invention.
Fig. 3 is a kind of circuit diagram of embodiment of efficient direct current fluorescent-lamp-use adaptive transformation device provided by the invention.
Fig. 4 is a kind of circuit diagram of embodiment of rectification filtering unit provided by the invention.
Fig. 5 is a kind of circuit diagram of embodiment of accessory power supply provided by the invention.
Fig. 6 is a kind of circuit diagram of embodiment of switch control unit provided by the invention.
Fig. 7 is a kind of circuit diagram of embodiment of filament pre-heating unit provided by the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention provide a kind of embodiment without stroboscopic Width funtion efficient direct current fluorescent lamp, it is as depicted in figs. 1 and 2, described
No stroboscopic Width funtion efficient direct current fluorescent lamp includes: rectification filtering unit 10, adaptive transformation device 20, accessory power supply 30, switch
Control unit 40, filament pre-heating unit 50 and DC fluorescent lamp tube 60.Wherein, rectification filtering unit 10 is separately connected alternating current
AC85-265, adaptive transformation device 20 and accessory power supply 30, rectification filtering unit 10 is for being converted to directly the alternating current of alternating current
Galvanic electricity simultaneously filters output to adaptive transformation device 20 and accessory power supply 30；Accessory power supply 30 be separately connected switch control unit 40,
Filament pre-heating unit 50 and adaptive transformation device 20, accessory power supply 30 are used to be converted in the direct current of input the electricity of burning voltage
Source to switch control unit 40, filament pre-heating unit 50 and adaptive transformation device 20 to power；Switch control unit 40 connects respectively
It is connected to and adapts to converter 20 and filament pre-heating unit 50, switch control unit 40 is used for according to the touch signal output control received
Signal processed is to control the work of adaptive transformation device 20 and filament pre-heating unit 50；Filament pre-heating unit 50 connects DC fluorescent lamp
Pipe 60, filament pre-heating unit 50 according to the control signal of switch control unit 40 for opening or closing to DC fluorescent lamp tube 60
Filament carry out warm operation；Adaptive transformation device 20 connects DC fluorescent lamp tube 60, and adaptive transformation device 20 is used for basis and opens
Close control unit 40 control signal open or close to rectification filtering unit 10 output direct current voltage transformation work with
The steady operation of electric current is exported, and when opening work, provides filter power supply to direct current according to the state of DC fluorescent lamp tube 60
Fluorescent tube 60 and starting voltage is provided to start the work of DC fluorescent lamp tube 60.
Specifically, AC85-265 is exactly to indicate wide operating voltage range, every country can be used.
The rectified filter unit 10 of alternating current AC85-265 is rectified into direct current and filters, and supplies accessory power supply 30 all the way, another
Road supplies adaptive converter 20.Accessory power supply 30 is used to power to switch control unit 40 and filament pre-heating unit 50；Switch
Control unit 40 is used for filament pre-heating unit 50 and the (control of adaptive transformation device 20.Filament pre-heating unit 50 is for starting
When filament is preheated to avoid caused fluorescent tube nigrescence phenomenon when starting, to make the higher use of DC fluorescent lamp tube 60
Service life.Adaptive transformation device 20 uses switch change-over scheme control, can make the guarantee in wide scope variation of the supply voltage of alternating current
The stabilization of output, while starting voltage is provided when exporting to DC fluorescent lamp tube, the transfer efficiency after improving fluorescent tube starting, and
The electrophoresis that can inhibit DC fluorescent lamp tube makes DC fluorescent lamp tube stable operation.
In specific implementation, as shown in Fig. 2, the adaptive transformation device 20 includes invariable power voltage current transformation unit 21
Starter unit 22 is filtered with LC, the invariable power voltage current transformation unit 21 and LC filtering starter unit 22 connect.Wherein, institute
Invariable power voltage current transformation unit 21 is stated for opening or closing invariable power electricity according to the control signal of switch control unit 40
The conversion and control of current voltage converter unit 21 works, and according to the state of DC fluorescent lamp tube to the defeated of rectification filtering unit 10
Direct current carries out the invariable power conversion and control of voltage and current out；LC filters starter unit 22 and is used to be become according to invariable power voltage and current
The output voltage for changing unit 21 carries out rectifying and wave-filtering, and provides starting voltage and stabling current to DC fluorescent lamp tube 60.
Specifically, as shown in figure 3, invariable power voltage current transformation unit 21 is fed back including PWM control module 211, first
Isolation module 212, the second feedback isolation module 213, voltage changing module 214 and switching tube Q1.Wherein, PWM control module 211 is distinguished
It is connect with the first feedback isolation module 212 and switching tube Q1, the second feedback isolation module 213 and LC filtering starter unit 22 connect
It connects, voltage changing module 214 is connect with switching tube Q1 and LC filtering starter unit 22 respectively.
In specific implementation, as shown in figure 4, the rectification filtering unit 10 include fuse F1, it is thermistor RT1, whole
Flow bridge BR1, the first inductance L1, first capacitor C10 and the second capacitor C11.Wherein, the firewire of one end connection alternating current of fuse F1
The first input end of the other end connection rectifier bridge BR1 of MainL, fuse F1, the zero of one end connection alternating current of thermistor RT1
Line MainN, thermistor RT1 the other end connection rectifier bridge BR1 the second input terminal, the first output end of rectifier bridge BR1 and
Connection first capacitor C10 between the second output terminal of rectifier bridge BR1, the first output end of rectifier bridge BR1 and the first inductance L1's
One end connection, the output end of the other end of the first inductance L1 as the rectification filtering unit and one end with the second capacitor C11
Connection, the second output terminal of the other end connection rectifier bridge BR1 of the second capacitor C11.Wherein, the other end output of the first inductance L1
The output voltage of 300V.
In specific implementation, as shown in figure 5, the accessory power supply 30 includes PWM switch chip U6, lowering and stabilizing blood pressure chip
U7, the first transformer T2, the first peripheral circuit 301, the second peripheral circuit 302, third peripheral circuit 303 and fourth peripheral circuit
304.Wherein, the first peripheral circuit 301 respectively with the output direct current of rectification filtering unit 10, PWM switch chip U6 and first
The primary coil of transformer T2 connects, and the second peripheral circuit 302 is connected with PWM switch chip U6, and exports the first conversion voltage
To the adaptive transformation device 20；Third peripheral circuit 303 connects the secondary coil of the first transformer T2 and exports the second conversion
Voltage is to filament pre-heating unit 50；Fourth peripheral circuit 304 respectively with the secondary coil and lowering and stabilizing blood pressure core of the first transformer T2
Piece U7 connection, and export third and convert voltage to switch control unit 40.
Specifically, first converts voltage as 15V, second converts voltage as 9V, and third converts voltage as 5V.First periphery electricity
Road 301 includes the first transfer resistance R22, the second transfer resistance R23, third transfer resistance R24, the first conversion capacitor C17, second
Convert capacitor C4, first diode D7, the second diode D6.Wherein one end of the first transfer resistance R22 connects rectifying and wave-filtering list
The output direct current of member 10, the other end of the first transfer resistance R22 are separately connected one end and the two or two of the second transfer resistance R23
The cathode of pole pipe D6, the first end of the second primary coil of the first transformer T2 of anode connection of the second diode D6, the two or two
The cathode of pole pipe D6 with second conversion capacitor C4 one end connect, second convert capacitor C4 the other end respectively with the first transformer
The second end and ground connection of the second primary coil of T2, the other end connection PWM switch chip U6's of the second transfer resistance R23
The output direct current of vdd terminal, rectification filtering unit 10 is connect with the first end of the first primary coil of the first transformer T2, third
One end of transfer resistance R24 and one end of the first conversion capacitor C17 respectively with the first primary coil of the first transformer T2 the
The other end of one end connection, the other end of third transfer resistance R24 and the first conversion capacitor C17 are respectively with first diode D7's
Cathode connection, the anode of first diode D7 are connect with the second end of the first primary coil of the first transformer T2.
Second peripheral circuit 302 includes third diode D3, the 4th transfer resistance R18, the 5th transfer resistance 19, the 6th turn
Change resistance R20 and third conversion capacitor C16.Wherein cathode output the first conversion voltage of third diode D3, third diode
The anode of D3 is connect with the first end of one end of the 4th transfer resistance R18 and the second primary coil of the first transformer T2 respectively,
The other end of 4th transfer resistance R18 is connect with the end INV of one end of the 5th transfer resistance R19 and PWM switch chip U6 respectively,
The other end of 5th transfer resistance R19 respectively with one end of the 6th transfer resistance R20 and connect, the 6th transfer resistance R20's
The other end is connect with the end CS of PWM switch chip U6, and third converts one end of capacitor C16 and the end COMP of PWM switch chip U6
Connection, third convert the other end and the ground connection of capacitor C16, and two ends D of PWM switch chip U6 connect the first transformer T2's
The second end of first primary coil.
Third peripheral circuit 303 includes the 4th diode D5, and the cathode of the 4th diode D5 connects the first transformer T2's
The second end of the first end of secondary coil, the secondary coil of the first transformer T2 is hanging, and the anode of the 4th diode D5 connects second turn
Change voltage.
Fourth peripheral circuit 304 includes the 4th capacitor C8 and the 5th capacitor C9, and one end of the 4th capacitor C8 is separately connected drop
Press the end IN and the second conversion voltage of voltage stabilizing chip U7, the other end of the 4th capacitor C8, the first transformer T2 secondary coil the
The one end at three ends, the end AD1 of lowering and stabilizing blood pressure chip U7 and the 5th capacitor C9 is grounded, and the other end of the 5th capacitor C9 connects decompression
The OUT terminal of voltage stabilizing chip U7 and the OUT terminal output third conversion voltage of voltage stabilizing chip U7.
Pass through PWM switch chip U6, the first transformer T2, the first peripheral circuit 301, the second peripheral circuit 302 and third
The high-voltage electricity that rectification filtering unit 10 exports is converted to stable low tension by peripheral circuit 303, for adaptive converter 20 and
Filament pre-heating unit uses.Then it by lowering and stabilizing blood pressure chip U7 and fourth peripheral circuit 304, is provided for switch control unit 40
Stable voltage.
In specific implementation, as shown in fig. 6, the switch control unit 40 includes for obtaining the touch signal of user simultaneously
The touch of output receives circuit 401 and the ON-OFF control circuit 402 for exporting four kinds of control signals according to touch signal, touches
It receives circuit 401 and ON-OFF control circuit 402 connects.Switch control unit 40 controls adaptive transformation device according to touch signal
20 work.
Specifically, it includes: first resistor R3, second resistance R28, third capacitor C2, first that the touch, which receives circuit 401,
Touch sheet, the first identification chip U4, the 4th capacitor C18,3rd resistor R31, the 4th resistance R29, the 5th resistance R1, the 5th is isolated
Capacitor C1, the second isolation touch sheet, the second identification chip U2, the 6th capacitor C7 and the 6th resistance R30.Wherein, first resistor R3
One end connection the first isolation touch sheet, the other end of first resistor R3 connects the end Tin of the first identification chip U4, second resistance
One end of R28 connects the OUT terminal of the first identification chip U4, and the other end of second resistance R28 connects the ON-OFF control circuit, the
One end of three capacitor C2 is connect with the other end of first resistor R3, and the other end of third capacitor C2 is connected to ground, 3rd resistor R31
One end connects third and converts voltage, and the other end of 3rd resistor R31 is separately connected one end and the first identification core of the 4th capacitor C18
The end VCC of piece U4, the other end of the 4th capacitor C18 are connected to ground, the end TOG of the first identification chip U4, the first identification chip U4
The end GND and the end OLH of the first identification chip U4 be grounded.One end connection the second isolation touch sheet of 5th resistance R1, the 5th
The other end of resistance R1 connects the end Tin of the second identification chip U2, and one end of the 4th resistance R29 connects the second identification chip U2's
OUT sections, the other end of the 4th resistance R29 connects the ON-OFF control circuit 402, one end of the 5th capacitor C1 and the 5th resistance R1
Other end connection, the other end of the 5th capacitor C1 is connected to ground, and the 6th one end resistance R30 connects third and converts voltage, the 6th
The resistance R30 other end is separately connected one end of the 6th capacitor C7 and the end VCC of the second identification chip U2, and the 6th capacitor C7's is another
End is connected to ground, the end TOG of the second identification chip U2, the end GND of the second identification chip U2 and the second identification chip U2 the end OLH
It is grounded.
Specifically, as shown in fig. 6, the ON-OFF control circuit 402 includes microcontroller U1.Wherein U1 microcontroller is used
In logic control, time switch etc..Microcontroller U1 receives circuit 401 with the touch respectively and third conversion voltage is connect,
Output first control signal PWR controls the opening and closing of adaptive transformation device 20, output second to adaptive transformation device 20
Control signal PWD controls the power of adaptive transformation device 20 to adaptive transformation device 20, and output third controls signal STF to certainly
Converter 20 is adapted to control the working frequency of adaptive transformation device 20 and the 4th control signal LPR of output to filament pre-heating list
Member 40 is to control the opening and closing of filament pre-heating unit 40.
In specific implementation, as shown in fig. 7, the filament pre-heating unit 40 includes the first pre- thermal resistance R4, the first current limliting
Switch Q2, the second pre- thermal resistance R21, the second current limiting switch Q3, the first zener diode ZD2, the second zener diode ZD3 and
Three pre- thermal resistance R25.Wherein, one end of the first pre- thermal resistance R4, the first end of the first current limiting switch Q2, the second pre- thermal resistance
One end of R21 is separately connected the second conversion voltage, the other end of the second pre- thermal resistance R21 respectively with the first current limiting switch Q2
Two ends are connected with the first end of the second current limiting switch Q3, and the third end of the first current limiting switch Q2 is separately connected the first pre- thermal resistance R4
The other end, the second end of the second current limiting switch Q3 and one end of the first zener diode ZD2, the first zener diode ZD2's
The other end connects one end of the pre- thermal resistance R25 of third, and the other end and the switch control unit 40 of the pre- thermal resistance R25 of third connects
Connect, the third end of the second current limiting switch Q3 be separately connected the second zener diode ZD3 one end and DC fluorescent lamp tube 60 one
End, the other end of the second zener diode ZD3 are separately connected one end and ground of DC fluorescent lamp tube 60.
When the i.e. the 4th control signal LPR is useful signal after switch control unit 40 issues effectively control signal, filament
Preheating unit 40 starts to apply voltage to the filament of DC fluorescent lamp tube 60 to heat.When the sending of switch control unit 40 has
I.e. the 4th control signal LPR is effective shutdown signal after imitating shutdown signal, and filament pre-heating unit 40 stops to DC fluorescent lamp tube
60 filament heating.
When the 4th control signal LPR of switch control unit is that low level is effective, the control of filament pre-heating unit 40 first
Current limiting switch Q2 and the second current limiting switch Q3 conducting, to be heated to the filament of DC fluorescent lamp tube 60.
In specific implementation, as shown in figure 3, PWM control module 211 is used to export the PWM of control and driving switch pipe Q1
Wave.PWM control module 211 includes control chip U5, the first control resistance R9, the second control resistance R10, third control resistance
R11, the 4th control resistance R14, the 5th control resistance R12, the 6th control resistance R13, the 7th control resistance R15, the 8th control
Resistance R7, the 9th control resistance R2, the first control capacitor C5, the second control capacitor C3, two poles of the control of third capacitor C6 and first
Pipe D1.Wherein, the output direct current of one end connection rectification filtering unit 10 of the first control resistance R9, the first control resistance R9's
One end of the second control of other end connection resistance R10, the end VIN of the other end connection control chip U5 of the second control resistance R10,
First control signal PWR is separately connected one end of the 8th control resistance R7 and one end of the 9th control resistance R2, and described the
The other end ground connection of eight control resistance R7, the end RT of the other end connection control chip U5 of the 9th control resistance R2.Accessory power supply
30 the first conversion voltage is separately connected one end of the first control capacitor C5, one end of the second control capacitor C3 and control chip U5
Vdd terminal, first control capacitor C5 the other end and second control capacitor C3 the other end be grounded, control chip U5 GATE
End is separately connected the cathode of the first control diode D1 and one end of third control resistance R11, the sun of the first control diode D1
Pole is separately connected the control terminal of the other end of third control resistance R11, one end of the 4th control resistance R14 and switching tube Q1, opens
One end of the control terminal and the 4th control resistance R14 of closing pipe Q1 is connect with the other end of third control resistance R11 respectively, controls core
The end SENSE of piece U5 is separately connected the other end of the 4th control resistance R14, one end of the 7th control resistance R15 and switching tube Q1
First end, the 7th control resistance R15 the other end ground connection, control chip U5 the end RI be separately connected the 5th control resistance R12
One end and the 6th control resistance R13 one end, the 5th control resistance R12 the other end connection third control signal STF, the 6th
Control resistance R13 the other end ground connection, control chip U5 the end FB be separately connected third capacitor C6 one end and first feedback every
From module 212, the other end of third capacitor C6 is grounded.PWM control module 211 controls PWM by the enable end of control chip U5
The PWM wave of control module 211 output control and driving switch pipe Q1.
First feedback isolation module 212 is used for current potential feedback isolation.First feedback isolation module 212 includes the first feedback electricity
Hinder the output section U3B and the second feedback resistance R6 of R5, isolation optocoupler.The one of second control signal PWD and the first feedback resistance R5
End connection, the other end of the first feedback resistance R5 are separately connected one end of the output section U3B of isolation optocoupler, the second feedback resistance R6
One end and control chip U5 the end FB, the other end of the other end of the output section U3B of isolation optocoupler and the second feedback resistance R6
Ground connection.
Second feedback isolation module 213 is used for current potential feedback isolation.Second feedback isolation module 213 includes the 4th pressure stabilizing two
The input unit U3A of pole pipe ZD1, third feedback resistance R16, the 4th feedback resistance R8 and isolation optocoupler.Wherein, two pole of the 4th pressure stabilizing
One end connection LC of pipe ZD1 filters starter unit 22, the other end of the 4th zener diode ZD1 and third feedback resistance R16's
One end connection, the other end of third feedback resistance R16 are separately connected one end of the 4th feedback resistance R8 and the input of isolation optocoupler
The other end of one end of portion U3A, the input unit U3A of the other end and isolation optocoupler of the 4th feedback resistance R8 is grounded.
The voltage changing module 214 includes that the second transformer T1 and third control capacitor C12, wherein third controls capacitor C12
One end connect respectively with the second end of one end of the primary coil of the second transformer T1 and switching tube Q1, the second transformer T1's
The output direct current of the other end connection rectification filtering unit 10 of primary coil, one end of third control capacitor C12 are separately connected
One end of the secondary coil of second transformer T1 and LC filter starter unit 22, the other end of the secondary coil of the second transformer T1
Ground connection.
Signal STF is controlled according to first control signal PWR, second control signal PWD and third, passes through PWM control module
211, the cooperation of the first feedback isolation module 212, the second feedback isolation module 213, voltage changing module 214 is with control switch pipe Q1's
It opens and is closed, so that invariable power voltage current transformation unit 21 may be implemented according to lamp tube status to rectification filtering unit 10
Wide-range voltage carries out the invariable power conversion and control of voltage and current, keeps lamps and lanterns reliable and can be used for global general-use voltage range.
That is, invariable power voltage current transformation unit 21 is straight according to the power control of setting after DC fluorescent lamp tube 60 is lighted
The voltage and current for flowing 60 both ends of fluorescent tube enters adaptive state.
The input terminal of LC filtering starter unit 22 connects the output end of the invariable power voltage current transformation unit 21, LC filter
The output end of wave starter unit 22 connects DC fluorescent lamp tube 60.LC filtering starter unit 22 is including LC current rectifying and wave filtering circuit and again
Starting circuit is pressed, LC current rectifying and wave filtering circuit is connected with multiplication of voltage starting circuit.LC current rectifying and wave filtering circuit is used for invariable power voltage electricity
The pulsating current that stream converter unit 21 exports rectify and supplies DC fluorescent lamp tube 60 after smothing filtering.Multiplication of voltage starting circuit
For carrying out multiplication of voltage to current output signal and exporting to open when invariable power voltage current transformation unit 21 starts output signal
Dynamic DC fluorescent lamp tube 60.
Specifically, LC current rectifying and wave filtering circuit includes the first rectifier diode D2, the first inductor rectifier L2 and the first rectified current
Hold C13 and the first dead resistance R26.Multiplication of voltage starting circuit includes the first starter diode D8, the first starting capacitor C14 and first
Starter resistance R27.One end of the voltage changing module 214 is separately connected the anode and the first starting capacitor of the first rectifier diode D2
One end of C14, the cathode of the first rectifier diode D2 are separately connected one end of the first commutation capacitor C13, the first dead resistance R26
One end, the anode of the first starter diode D8 and one end of the second feedback isolation module 213, the first commutation capacitor C13's is another
The other end of one end and the first dead resistance R26 are grounded, and the other end of the first starting capacitor C14 connects the first starter resistance
One end of R27, the other end of the first starter resistance R27 are separately connected one end and the first starter diode of the first inductor rectifier L2
The other end of the cathode of D8, the first inductor rectifier L2 connects DC fluorescent lamp tube 60.By the first rectifier diode D2, the first rectification
Inductance L2 and the first commutation capacitor C13 and the first dead resistance R26 composition LC current rectifying and wave filtering circuit becomes invariable power voltage and current
The pulsating current for changing the output of unit 21 rectify and supplies DC fluorescent lamp tube 60 after smothing filtering；By the first starter diode
D8, the first starting capacitor C14 and the first starter resistance R27 form multiplication of voltage starting circuit, when invariable power voltage current transformation unit
21 start to carry out multiplication of voltage output when output to start DC fluorescent lamp tube 60.When DC fluorescent lamp tube 60 is normal and working frequency drops
Voltage multiplying rectifier basically lost its role after low, but plus the filter action for having energy storage inductor coil L2, it will not be to DC fluorescent lamp
The working condition of pipe 60 causes adverse effect.
In specific implementation, after switch control unit 40 issues effectively control signal, the 20 pairs of rectification filters of adaptive transformation device
The voltage 10 of wave unit carries out boost or depressurization transformation, so that the output voltage of adaptive transformation device 20 meets DC fluorescent lamp tube
60 demand simultaneously makes stable output power, and changes electric current suitably according to the voltage status of DC fluorescent lamp tube 60,
Stablize so that the illumination of DC fluorescent lamp tube 60 exports.Switch control unit 40 controls power tube Q1 by adaptive transformation device 20
Switch accounting and frequency, so that energy-storage transformer T1 is stored energy appropriate and is discharged to LC filtering starter unit 22 and be filtered
And multiplication of voltage starter output.After switch control unit 40 issues effective shutdown signal, adaptive transformation device 20 close and enter to
Machine state is to reduce power consumption.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of efficient direct current fluorescent-lamp-use adaptive transformation device, which is characterized in that the adaptive transformation device includes invariable power
Voltage current transformation unit and LC filter starter unit, and the invariable power voltage current transformation unit and LC filtering starter unit connect
It connects；
The invariable power voltage current transformation unit is used for the control signal of the switch control unit according to efficient direct current fluorescent lamp
The conversion and control work of invariable power voltage current transformation unit is opened or closed, and glimmering according to the direct current of efficient direct current fluorescent lamp
The invariable power that the state of light lamp tube carries out voltage and current to the output direct current of the rectification filtering unit of efficient direct current fluorescent lamp turns
Change control；
LC filters starter unit and is used to carry out rectifying and wave-filtering according to the output voltage of invariable power voltage current transformation unit, and provides
Starting voltage and stabling current give the DC fluorescent lamp tube.
2. adaptive transformation device as described in claim 1, which is characterized in that invariable power voltage current transformation unit includes PWM
Control module, the first feedback isolation module, the second feedback isolation module, voltage changing module and switching tube；
PWM control module is connect with the first feedback isolation module and switching tube respectively, and the second feedback isolation module and LC filtering are opened
The connection of brightness unit, voltage changing module are connect with switching tube and LC filtering starter unit respectively.
3. adaptive transformation device as claimed in claim 2, it is characterised in that: LC filtering starter unit includes LC rectifying and wave-filtering electricity
Road and multiplication of voltage starting circuit, LC current rectifying and wave filtering circuit are connected with multiplication of voltage starting circuit；
LC current rectifying and wave filtering circuit is for rectifying the pulsating current that invariable power voltage current transformation unit exports and smoothly being filtered
DC fluorescent lamp tube is supplied after wave；
Multiplication of voltage starting circuit be used for when invariable power voltage current transformation unit starts output signal, to current output signal into
Row multiplication of voltage is exported to start DC fluorescent lamp tube.
4. adaptive transformation device as claimed in claim 3, it is characterised in that: LC current rectifying and wave filtering circuit includes the first two poles of rectification
Pipe, the first inductor rectifier and the first commutation capacitor and the first dead resistance, multiplication of voltage starting circuit include the first starter diode, the
One starting capacitor and the first starter resistance, one end of the voltage changing module are separately connected the anode and first of the first rectifier diode
One end of starting capacitor, the cathode of the first rectifier diode are separately connected one end of the first commutation capacitor, first dead resistance
One end, the anode of the first starter diode and the second feedback isolation module one end, the other end of the first commutation capacitor and first
The other end of dead resistance is grounded, and the other end of the first starting capacitor connects one end of the first starter resistance, the first starter electricity
The other end of resistance is separately connected one end of the first inductor rectifier and the cathode of the first starter diode, the first inductor rectifier it is another
End connection DC fluorescent lamp tube.
5. adaptive transformation device as claimed in claim 2, it is characterised in that: PWM control module includes control chip, the first control
Resistance processed, the second control resistance, third control resistance, the 4th control resistance, the 5th control resistance, the 6th control resistance, the 7th
Control resistance, the 8th control resistance, the 9th control resistance, the first control capacitor, the second control capacitor, third capacitor and the first control
Diode processed, the output direct current of the rectification filtering unit of one end connection DC fluorescent lamp of the first control resistance, the first control
One end of other end connection the second control resistance of resistance, the end VIN of the other end connection control chip of the second control resistance, the
One control signal is separately connected one end of the 8th control resistance and one end of the 9th control resistance, the 8th control resistance
The other end ground connection, the 9th control resistance the other end connection control chip U5 the end RT, the accessory power supply of DC fluorescent lamp
First conversion voltage is separately connected the vdd terminal of one end of the first control capacitor, one end of the second control capacitor and control chip, the
The other end of the other end of one control capacitor and the second control capacitor is grounded, and the end GATE for controlling chip is separately connected the first control
One end of cathode and third the control resistance of diode processed, the anode of the first control diode are separately connected third control resistance
The other end, the 4th control one end of resistance and the control terminal of switching tube, one end of the control terminal of switching tube and the 4th control resistance
It is connect respectively with the other end of third control resistance, the end SENSE of control chip U5 is separately connected the another of the 4th control resistance
The first end at end, one end of the 7th control resistance and switching tube, the other end ground connection of the 7th control resistance, controls the RI of chip U5
End is separately connected one end of the 5th control resistance and one end of the 6th control resistance, and the other end of the 5th control resistance connects third
Signal is controlled, the end FB of the other end ground connection of the 6th control resistance, control chip U5 is separately connected one end and the of third capacitor
One feedback isolation module, the other end ground connection of third capacitor.
6. adaptive transformation device as claimed in claim 5, it is characterised in that: the first feedback isolation module includes the first feedback electricity
Resistance, the output section of isolation optocoupler and the second feedback resistance, second control signal are connected with one end of the first feedback resistance, and first is anti-
The other end of feed resistance is separately connected one end of output section, one end of the second feedback resistance and the FB for controlling chip of isolation optocoupler
The other end ground connection of end, the other end of the output section of isolation optocoupler and the second feedback resistance.
7. adaptive transformation device as claimed in claim 6, it is characterised in that: the second feedback isolation module includes the 4th pressure stabilizing two
The input unit of pole pipe, third feedback resistance, the 4th feedback resistance and isolation optocoupler；One end connection LC filter of 4th zener diode
Wave starter unit, the other end of the 4th zener diode are connected with one end of third feedback resistance, third feedback resistance it is another
End be separately connected the 4th feedback resistance one end and isolation optocoupler input unit one end, the other end of the 4th feedback resistance and every
The other end of input unit from optocoupler is grounded.
8. adaptive transformation device as claimed in claim 7, it is characterised in that: the voltage changing module includes the second transformer and the
Three control capacitors, wherein third control one end of capacitor respectively with one end of the primary coil of the second transformer and switching tube
Second end connection, the output direct current of the other end connection rectification filtering unit of the primary coil of the second transformer, third control
One end of capacitor is separately connected one end and the LC filtering starter unit of the secondary coil of the second transformer, the secondary of the second transformer
The other end of coil is grounded.
9. a kind of efficient direct current fluorescent lamp, it is characterised in that: including the adaptive transformation as described in claim 1-8 any one
Device.
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| CN201811153960.6A CN109451639B (en) | 2018-09-30 | 2018-09-30 | A kind of efficient direct current fluorescent lamp and efficient direct current fluorescent-lamp-use adaptive transformation device |
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