CN104540304A - Electronic replacement-type double-end straight-tube LED fluorescent lamp and safety protection circuit thereof - Google Patents
Electronic replacement-type double-end straight-tube LED fluorescent lamp and safety protection circuit thereof Download PDFInfo
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- CN104540304A CN104540304A CN201510023550.XA CN201510023550A CN104540304A CN 104540304 A CN104540304 A CN 104540304A CN 201510023550 A CN201510023550 A CN 201510023550A CN 104540304 A CN104540304 A CN 104540304A
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Abstract
The invention relates to an electronic replacement-type double-end straight-tube LED fluorescent lamp and a safety protection circuit thereof. The safety protection circuit comprises a fluorescent-lamp tube simulating cathode circuit connected to a first output end and a second output end of a fluorescent-lamp electronic ballast, wherein the output end of the fluorescent-lamp tube simulating cathode circuit is connected with a first anode of a bidirectional silicon controlled rectifier, and a second anode of the bidirectional silicon controlled rectifier is connected to the input end of a high-frequency rectifying and filtering circuit of the double-end straight-tube LED fluorescent lamp by a fourth capacitor and a fifth capacitor; a high-frequency triggering circuit capable being triggered and conducted under the high-frequency state of more than 10KHz is arranged between a control electrode of the bidirectional silicon controlled rectifier and the output end of the fluorescent-lamp tube simulating cathode circuit; or an open-circuit state with distributed capacitance is arranged between the control electrode of the bidirectional silicon controlled rectifier and the output end of the fluorescent-lamp tube simulating cathode circuit; and circuits at a third output end and a fourth output end of the fluorescent-lamp electronic ballast are symmetrical to circuits at the first output end and the second output end.
Description
Technical field
The present invention relates to lighting technical field, more particularly, relate to a kind of electronic type substituted type double end and straight tube LED daylight lamp and safety protective circuit thereof.
Background technology
LED fluorescent lamp tube possesses because of it advantage that luminous efficiency is high and energy consumption is low, progressively replaces conventional fluorescent fluorescent tube, is applied to various occasion more and more widely, to realize efficient illumination and energy-conservation object.At present for directly replacing the both-end substituted type LED lamp tube of traditional fluorescent tube, not needing that amendment is made to original fitting structure and can realize replacing.Refer to patent application CN 103929858A, disclose in this application a kind of utilize electronic ballast for fluoresent lamp to drive LED fluorescent lamp tube and lighting, wherein by adopting filtering high-frequency rectifier unit to realize mating with the Filament of fluorescent lamp impedance of electronic ballast for fluoresent lamp, and realized luminous by LED module, make not need that light fixture is carried out improving construction and can reach the object that the adaptive electronic ballast for fluoresent lamp of LED fluorescent lamp tube realizes illumination.
Specify requirement according to international IEC62776-2012 and IEC62776-2014, need to carry out multinomial safety test to the both-end LED for alternative conventional fluorescent.Wherein specify, when only one end lamp holder is inserted into lamp socket, electricity can be delivered to another lamp holder end also do not inserted, now electric shock should not be caused, adopt following detection method to verify its accordance: to the circuit ON rated voltage of lamp, and only allowing one end of lamp socket enter electricity, fluorescent tube one end lamp holder inserts lamp socket, requires that detecting the other end lamp holder not inserting lamp socket does not have conductive component to cause electric shock according to IEC 60598-1 appendix A.In addition, also specify the requirement according to IEC61347-1 appendix A, lamp holder pin pin or contact are no less than 2M Ω to the insulation resistance between other end lamp holder pin pin or contact.When carrying out megger test, in humidity chamber, apply about 500V direct voltage.Dielectric strength test should be carried out immediately after carrying out dielectric strength test.During dielectric test, apply voltage more than 1500V.
But in the LED fluorescent lamp tube circuit arrangement of above-mentioned prior art; the rectification filtering unit connecting LED module is directly connected with electronic ballast for fluoresent lamp; middle without any safety protective circuit; therefore by the above-mentioned multinomial safety test carried out both-end LED, great potential safety hazard cannot be there is.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of the electronic type substituted type double end and straight tube LED daylight lamp and the safety protective circuit thereof that meet international IEC62776-2012 and IEC62776-2014 safety code requirements.
The technical solution adopted for the present invention to solve the technical problems is:
Construct a kind of electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit, wherein, comprise the fluorescent tube simulation cathode circuit of the first output and the second output being connected to electronic ballast for fluoresent lamp; Wherein, the output of described fluorescent tube simulation cathode circuit is connected with a two-way silicon controlled first anode, and the second plate of described bidirectional triode thyristor is connected to the input of the rectifier filter circuit of double end and straight tube LED daylight lamp by the 4th electric capacity and the 5th electric capacity;
The high frequency circuits for triggering of triggering and conducting under the high frequency state being greater than 10kHz are provided with between the output that cathode circuit simulated by the control pole of described bidirectional triode thyristor and described fluorescent tube;
Or, for there is the open-circuit condition of distributed capacitance between the output that cathode circuit simulated by the control pole of described bidirectional triode thyristor and described fluorescent tube;
3rd output of described electronic ballast for fluoresent lamp and the circuit of the 4th output arrange and arrange symmetrical with the circuit of described first output and described second output.
Safety protective circuit of the present invention, wherein, described high frequency circuits for triggering comprise the 3rd electric capacity, and the capacitance span of described 3rd electric capacity is 1P-10 μ F;
Or described high frequency circuits for triggering are made up of the 6th electric capacity of mutually connecting and the 7th electric capacity, the capacitance span of described 6th electric capacity and the 7th electric capacity is 1P-10 μ F;
Or described high frequency circuits for triggering are made up of the 8th electric capacity be connected in series and the 9th resistance, the capacitance span of the 8th electric capacity is 1P-10 μ F, and the span of described 9th resistance is 1 Ω-10 Ω;
Described bidirectional triode thyristor is 1-5A and is withstand voltagely greater than 1KV.
Safety protective circuit of the present invention, wherein, the first resistance between described first output of electronic ballast for fluoresent lamp and described second output and the second resistance is connected to after described fluorescent tube simulation cathode circuit comprises series connection mutually, described first resistance two ends are connected in parallel to the first electric capacity, and described second resistance two ends are connected in parallel to the second electric capacity; Wherein,
Tie point between described first resistance and described second resistance is the output of described fluorescent tube simulation cathode circuit.
Safety protective circuit of the present invention, wherein, described first resistance and described second resistance value scope are 1 Ω-1k Ω;
Described first electric capacity and described second electric capacity span are 0.01 μ F-10 μ F;
Described 4th electric capacity and described 5th electric capacity span are 0.01 μ F-50 μ F.
Safety protective circuit of the present invention, wherein, the first resettable fuse between described first output of electronic ballast for fluoresent lamp and described second output and the second resettable fuse is connected to after described fluorescent tube simulation cathode circuit comprises series connection mutually;
Tie point between described first resettable fuse and described second resettable fuse is the output of described fluorescent tube simulation cathode circuit;
Described first resettable fuse and described second resettable fuse current parameters span are 0.25-2A.
Safety protective circuit of the present invention, wherein, described safety protective circuit also comprises the buffer circuit resistance via for maintaining system small area analysis operating state, comprising:
Be connected to the 3rd resistance between the first output of described electronic ballast for fluoresent lamp and the second plate of described bidirectional triode thyristor;
Be connected to the 4th resistance between the second output of described electronic ballast for fluoresent lamp and the second plate of described bidirectional triode thyristor;
Be connected in the 5th resistance at described 4th electric capacity two ends in parallel; And, be connected in the 6th resistance at described 5th electric capacity two ends in parallel;
Wherein, described 3rd resistance, described 4th resistance, described 5th resistance and described 6th resistance value scope are 1M Ω-10M Ω.
Present invention also offers a kind of electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit, wherein, comprise the fluorescent tube simulation cathode circuit of the first output and the second output being connected to electronic ballast for fluoresent lamp; Wherein, the output of described fluorescent tube simulation cathode circuit is connected in series with by least two and the bidirectional triode thyristor group that the identical bidirectional triode thyristor of model forms connects, the first anode being positioned at bidirectional triode thyristor foremost in described bidirectional triode thyristor group is connected with the output that cathode circuit simulated by described fluorescent tube, and the second plate being positioned at the bidirectional triode thyristor of rearmost end in described bidirectional triode thyristor group is connected to the input of the rectifier filter circuit of double end and straight tube LED daylight lamp by the 4th electric capacity and the 5th electric capacity;
In described bidirectional triode thyristor group, the control of each bidirectional triode thyristor is extremely all connected with the high frequency circuits for triggering of triggering and conducting under the high frequency state being greater than 10kHz; Wherein, the control pole being positioned at the bidirectional triode thyristor of rear end is electrically connected with the control pole of the bidirectional triode thyristor of adjacent headend by described high frequency circuits for triggering, and the output that cathode circuit is simulated by described high frequency circuits for triggering and described fluorescent tube in the control pole being positioned at bidirectional triode thyristor is foremost electrically connected;
Or, between the output that in described bidirectional triode thyristor group, the control pole of each bidirectional triode thyristor is and cathode circuit simulated by described fluorescent tube, there is the open-circuit condition of distributed capacitance;
3rd output of described electronic ballast for fluoresent lamp and the circuit of the 4th output arrange and arrange symmetrical with the circuit of described first output and described second output.
Present invention also offers a kind of electronic type substituted type double end and straight tube LED daylight lamp, driven by electronic ballast for fluoresent lamp, comprise the rectifier filter circuit be connected with LED group; Wherein, the safety protective circuit as described in aforementioned any one is connected with between the output of described electronic ballast for fluoresent lamp and described rectifier filter circuit.
Electronic type substituted type double end and straight tube LED daylight lamp of the present invention, wherein, described rectifier filter circuit comprises the first diode, the second diode, the 3rd diode and the 4th diode and electric capacity;
Wherein, described first diode and described second diode are connected in series by the 7th resistance or the 3rd resettable fuse;
Described 3rd diode and described 4th diode by the July 1st resistance or the 31 resettable fuse be connected in series;
The negative pole of described first diode connects the negative pole of described 3rd diode, and the positive pole of described second diode connects the positive pole of described 4th diode;
The second plate of described bidirectional triode thyristor is connected to the tie point place of described first diode and described 7th resistance by described 4th electric capacity;
The second plate of described bidirectional triode thyristor is connected to the tie point place of described second diode and described 7th resistance simultaneously by described 5th electric capacity;
Described electric capacity is connected between the negative pole of described 3rd diode and the positive pole of described 4th diode;
Described electric capacity two ends are connected in parallel to piezo-resistance.
Electronic type substituted type double end and straight tube LED daylight lamp of the present invention, wherein, described rectifier filter circuit is arranged in two lamp holders of electronic type substituted type double end and straight tube LED daylight lamp with the form of the first module;
Described safety protective circuit is arranged in two lamp holders of described electronic type substituted type double end and straight tube LED daylight lamp with the form of the second module, and two lamp holder inner structures are symmetrical;
Described first module wherein in the lamp holder of one end is electrically connected by screw thread copper post with between described second module, and described screw thread copper post is connected to the two ends of described 7th resistance, or described screw thread copper post is connected to the two ends of described 3rd resettable fuse.
Beneficial effect of the present invention is: by arranging bidirectional triode thyristor between the output of the electronic ballast for fluoresent lamp in electronic type substituted type double end and straight tube LED daylight lamp and rectifier filter circuit, and under the control pole of bidirectional triode thyristor is connected to the high frequency state being greater than 10kHz the high frequency circuits for triggering of triggering and conducting, or, for there is the open-circuit condition of distributed capacitance between the output that cathode circuit simulated by the control pole of bidirectional triode thyristor and fluorescent tube, make when low frequency (power frequency 50/60Hz), signal cannot trigger bidirectional triode thyristor, when being in high frequency (being greater than 10k Hz) state, the conducting of high frequency circuits for triggering, at once bidirectional triode thyristor is triggered, thus connect electronic ballast for fluoresent lamp high frequency output electric current and the normal service aisle of LED group, play the effect of safeguard protection.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit and the interlock circuit schematic diagram one of present pre-ferred embodiments;
Fig. 2 is electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit and the interlock circuit schematic diagram two of present pre-ferred embodiments;
Fig. 3 is the high frequency circuits for triggering schematic diagram one of present pre-ferred embodiments;
Fig. 4 is the high frequency circuits for triggering schematic diagram two of present pre-ferred embodiments;
Fig. 5 is electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit and the interlock circuit of the employing resettable fuse substitutional resistance of present pre-ferred embodiments;
Fig. 6 is electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit and the interlock circuit schematic diagram of another embodiment of the present invention;
Fig. 7 is the electronic type substituted type double end and straight tube LED daylight lamp lamp holder internal structure schematic diagram of present pre-ferred embodiments.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 and Fig. 2 shows the electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit of present pre-ferred embodiments, and for convenience of explanation, wherein illustrate only the part relevant to the embodiment of the present invention, details are as follows:
Electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit comprises the fluorescent tube simulation cathode circuit of the first output 1 and the second output 2 being connected to electronic ballast for fluoresent lamp 100; Wherein, the output of fluorescent tube simulation cathode circuit is connected with the first anode of a two-way controllable silicon SCR, and the second plate of bidirectional triode thyristor SCR is connected to the input of the rectifier filter circuit 300 of double end and straight tube LED daylight lamp by the 4th electric capacity C4 and the 5th electric capacity C5; The high frequency circuits for triggering 201 of triggering and conducting under the high frequency state being greater than 10kHz are provided with between the output that cathode circuit simulated by the control pole of bidirectional triode thyristor SCR and fluorescent tube; Or, for there is the open-circuit condition of distributed capacitance between the output that cathode circuit simulated by the control pole of bidirectional triode thyristor and fluorescent tube; 3rd output 3 of electronic ballast for fluoresent lamp 100 and the circuit of the 4th output 4 arrange and arrange symmetrical with the circuit of the first output 1 and the second output 2.
Above-mentioned protective circuit operation principle is: when low frequency (power frequency 50/60Hz), signal cannot trigger bidirectional triode thyristor SCR, when being in high frequency (being greater than 10k Hz) state, make to be connected to high frequency circuits for triggering 201 conducting that bidirectional triode thyristor SCR controls pole, the about 0.1-50mA of On current, at once bidirectional triode thyristor SCR is triggered, electric current simulates by fluorescent tube the first anode that cathode circuit is incorporated into bidirectional triode thyristor SCR, rectifying and wave-filtering is carried out to the rectifier filter circuit 300 of double end and straight tube LED daylight lamp respectively again through the 4th electric capacity C4 and the 5th electric capacity C5, lightening LED lamp group 400 again, thus connect electronic ballast for fluoresent lamp 100 high frequency output electric current and the normal service aisle of LED group 400, play the effect of safeguard protection.
In above-described embodiment, be different from current trigger mode during general use, make use of the frequency trigger characteristic of bidirectional triode thyristor SCR cleverly, carrying out safety standard test or in user installation LED daylight lamp process, safety protective circuit can make both-end LED lamp tube two ends insulation resistance be greater than 2M Ω, when applying AC1500V, 50/60Hz voltage in lamp tube ends, there will not be flicker and punch-through; When one end adds AC500V, 50/60Hz power supply wherein simultaneously, the pick-up current of the anthropological measuring network that other end access IEC 60598-1 annex G specifies is less than 0.7mA.
In above-described embodiment, as shown in Figure 2, for there is the open-circuit condition of distributed capacitance between the output that cathode circuit simulated by the control pole of bidirectional triode thyristor SCR and fluorescent tube, specifically refer to: is opened a way in the control pole of bidirectional triode thyristor SCR, do not connect any element, but due to other each components and parts impacts of circuit, between the output of simulating cathode circuit in this control pole and fluorescent tube there is circuit distributed capacitance in essence.This distributed capacitance isolation low-frequency current; under making low frequency state, signal cannot trigger bidirectional triode thyristor SCR; when being in high frequency (being greater than 10k Hz) state; high-frequency current triggers bidirectional triode thyristor SCR at once through this distributed capacitance; thus connect electronic ballast for fluoresent lamp 100 high frequency output electric current and the normal service aisle of LED group 400, play the effect of safeguard protection.
In above-described embodiment, bidirectional triode thyristor SCR preferably adopts value to be 1-5A and the withstand voltage bidirectional triode thyristor being greater than 1KV.Wherein, bidirectional triode thyristor SCR can regard as and is made up of a PNP pipe and a NPN pipe, and therefore, the multiple tube with identical function adopting the conversion of the triode of same structure to form also should in the protection range of above-described embodiment.
In a further embodiment, as shown in Figure 1, the first resistance R1 between the first output 1 of electronic ballast for fluoresent lamp 100 and the second output 2 and the second resistance R2 is connected to after above-mentioned fluorescent tube simulation cathode circuit comprises series connection mutually, first resistance R1 two ends are connected in parallel to the first electric capacity C1, and the second resistance R2 two ends are connected in parallel to the second electric capacity C2; Wherein, the tie point between the first resistance R1 and the second resistance R2 is the output of fluorescent tube simulation cathode circuit.
Preferably, above-mentioned first resistance R1 and the second resistance R2 is the resistance of same size, and preferred span is 1 Ω-1k Ω; The preferred span of the first electric capacity C1 and the second electric capacity C2 is 0.01 μ F-10 μ F; The preferred span of the 4th electric capacity C4 and the 5th electric capacity C5 is 0.01 μ F-50 μ F.
In a further embodiment, as shown in Figure 5, the first resettable fuse P1 between the first output 1 of electronic ballast for fluoresent lamp 100 and the second output 2 and the second resettable fuse P2 is connected to after above-mentioned fluorescent tube simulation cathode circuit comprises series connection mutually; Tie point between first resettable fuse P1 and the second resettable fuse P2 is the output of fluorescent tube simulation cathode circuit; First resettable fuse P1 and the second resettable fuse P2 current parameters span are 0.25-2A.That is, adopt the first resettable fuse P1 and the second resettable fuse P2 to substitute the first resistance R1 in preceding embodiment and the second resistance R2, do not need connection first electric capacity C1 and the second electric capacity C2.
Wherein, resettable fuse is made up of polymeric matrix and the carbon black particle making it conduct electricity, and because this material has certain conductive capability, thus it has electric current and passes through.When there being overcurrent by thermistor, the heat of generation will make it expand, thus carbon black particle will be separated, its resistance will rise.This will impel thermistor to produce heat faster, expand larger, make resistance raise further.When temperature reaches 125 DEG C, resistance variations is remarkable, thus electric current is obviously reduced.The small area analysis now flowing through thermistor is enough to make it remain on this temperature and be in high-impedance state.When after failture evacuation, thermistor is contracted to original shape and is again tied by carbon black particle, thus macromolecular PTC thermistor is cooled very soon and is returned to original low resistance state, so again can periodic duty.
In a further embodiment, as shown in Figure 1, above-mentioned high frequency circuits for triggering 201 comprise concrete 3rd electric capacity C3,3rd electric capacity C3 one end is connected to the output of fluorescent tube simulation cathode circuit, the other end connects the control pole of bidirectional triode thyristor, and the preferred span of the 3rd electric capacity C3 capacitance is 1P-10 μ F.When low frequency (power frequency 50/60Hz); 3rd electric capacity C3 isolates low-frequency current; signal cannot trigger bidirectional triode thyristor SCR; when being in high frequency (being greater than 10k Hz) state; high-frequency current triggers bidirectional triode thyristor SCR at once through the 3rd electric capacity C3; thus connect electronic ballast for fluoresent lamp 100 high frequency output electric current and the normal service aisle of LED group 400, play the effect of safeguard protection.
In a further embodiment, as shown in Figure 3, above-mentioned high frequency circuits for triggering 201 are made up of the 6th electric capacity C6 mutually connected and the 7th electric capacity C7, and the preferred span of the capacitance of the 6th electric capacity C6 and the 7th electric capacity C7 is 1P-10 μ F.Equally; when low frequency (power frequency 50/60Hz); the series circuit isolation low-frequency current that 6th electric capacity C6 and the 7th electric capacity C7 forms; signal cannot trigger bidirectional triode thyristor SCR; when being in high frequency (being greater than 10k Hz) state; high-frequency current triggers bidirectional triode thyristor SCR at once through the 6th electric capacity C6 and the 7th electric capacity C7, thus connects electronic ballast for fluoresent lamp 100 high frequency output electric current and the normal service aisle of LED group 400, plays the effect of safeguard protection.
In a further embodiment, as shown in Figure 4, above-mentioned high frequency circuits for triggering are made up of the 8th electric capacity C8 be connected in series and the 9th resistance R9, and the preferred span of capacitance of the 8th electric capacity C8 is 1P-10 μ F, and the preferred span of the 9th resistance R9 is 1 Ω-10 Ω.Equally; when low frequency (power frequency 50/60Hz); the series circuit isolation low-frequency current that 8th electric capacity C8 and the 9th resistance R9 forms; signal cannot trigger bidirectional triode thyristor SCR; when being in high frequency (being greater than 10k Hz) state; high-frequency current forms triggering bidirectional triode thyristor SCR at once through the 8th electric capacity C8 and the 9th resistance R9, thus connects electronic ballast for fluoresent lamp high frequency output electric current and the normal service aisle of LED group, plays the effect of safeguard protection.
Be appreciated that the high frequency circuits for triggering 201 in the various embodiments described above can also have other variations, only need meet and isolate electric current under low frequency state, in high frequency triggering and conducting, not enumerate at this.
In a further embodiment, above-mentioned electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit 200 also comprises the buffer circuit resistance via for maintaining system small area analysis operating state, comprising: be connected to the 3rd resistance R3 between the first output 1 of electronic ballast for fluoresent lamp 100 and the second plate of bidirectional triode thyristor SCR; Be connected to the 4th resistance R4 between the second output 2 of electronic ballast for fluoresent lamp 100 and the second plate of bidirectional triode thyristor SCR; Be connected in the 5th resistance R5 at the 4th electric capacity C4 two ends in parallel; And, be connected in the 6th resistance R6 at the 5th electric capacity C5 two ends in parallel; Wherein, the preferred span of the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 is 1M Ω-10M Ω.
Time under low frequency state; because bidirectional triode thyristor SCR is in cut-off state; the buffer circuit resistance via be made up of the 3rd resistance R3, the 4th resistance R4 of larger resistance, the 5th resistance R5 and the 6th resistance R6 can allow system small area analysis to flow through; thus take into account the different starter characteristic of all types of electric ballasts, play circuit safety protective effect.
As shown in Figure 6, present invention also offers another embodiment of electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit, comprise the fluorescent tube simulation cathode circuit of the first output 1 and the second output 2 being connected to electronic ballast for fluoresent lamp 100; Wherein, the output of fluorescent tube simulation cathode circuit is connected in series with by least two and the bidirectional triode thyristor group SCR ' connection that forms of the identical bidirectional triode thyristor SCR of model, the first anode being positioned at bidirectional triode thyristor foremost in bidirectional triode thyristor group SCR ' is connected with the output that cathode circuit simulated by fluorescent tube, and the second plate being positioned at the bidirectional triode thyristor of rearmost end in bidirectional triode thyristor group SCR ' is connected to the input of the rectifier filter circuit 300 of double end and straight tube LED daylight lamp by the 4th electric capacity C4 and the 5th electric capacity C5; In bidirectional triode thyristor group SCR ', the control of each bidirectional triode thyristor is extremely all connected with the high frequency circuits for triggering 201 of triggering and conducting under the high frequency state being greater than 10kHz; Wherein, the control pole being positioned at the bidirectional triode thyristor of rear end is electrically connected with the control pole of the bidirectional triode thyristor of adjacent headend by high frequency circuits for triggering 201, and the output that cathode circuit is simulated by high frequency circuits for triggering 201 and fluorescent tube in the control pole being positioned at bidirectional triode thyristor is foremost electrically connected; Or, between the output that in bidirectional triode thyristor group, the control pole of each bidirectional triode thyristor is and cathode circuit simulated by fluorescent tube, there is the open-circuit condition of distributed capacitance; 3rd output 3 of electronic ballast for fluoresent lamp 100 and the circuit of the 4th output 4 arrange and arrange symmetrical with the circuit of the first output 1 and the second output 2.
Consult Fig. 6, above-mentioned safety protective circuit operation principle is: when low frequency (power frequency 50/60Hz), signal cannot trigger bidirectional triode thyristor group SCR ', when being in high frequency (being greater than 10k Hz) state, make to be connected to high frequency circuits for triggering 201 conducting that bidirectional triode thyristor group SCR ' controls pole, the about 0.1-50mA of On current, at once bidirectional triode thyristor group SCR ' is triggered, electric current simulates by fluorescent tube the first anode that cathode circuit is incorporated into bidirectional triode thyristor group SCR ', rectifying and wave-filtering is carried out to the rectifier filter circuit 300 of double end and straight tube LED daylight lamp respectively again through the 4th electric capacity C4 and the 5th electric capacity C5, lightening LED lamp group 400 again, thus connect electronic ballast for fluoresent lamp 100 high frequency output electric current and the normal service aisle of LED group 400, play the effect of safeguard protection.
Owing to have employed the bidirectional triode thyristor bidirectional triode thyristor group SCR ' in series of two or more (such as two, three, four), make protective circuit withstand voltage properties better.Carrying out safety standard test or in user installation LED daylight lamp process, safety protective circuit can make both-end LED lamp tube two ends insulation resistance be greater than 2M Ω, when applying AC1500V, 50/60Hz voltage in lamp tube ends, there will not be flicker and punch-through; When one end adds AC500V, 50/60Hz power supply wherein simultaneously, the pick-up current of the anthropological measuring network that other end access IEC 60598-1 annex G specifies is less than 0.7mA.
In safety protective circuit shown in Fig. 6, in bidirectional triode thyristor group SCR ', single bidirectional triode thyristor SCR is 1-5A and is withstand voltagely greater than 1KV.Be connected in series for three bidirectional triode thyristors, comprise the first bidirectional triode thyristor, the second bidirectional triode thyristor that are positioned at front end and be positioned at the 3rd bidirectional triode thyristor of rear end, the second plate of the first bidirectional triode thyristor connects the first anode of the second bidirectional triode thyristor, and the second plate of the second bidirectional triode thyristor connects the first anode of the 3rd bidirectional triode thyristor; The control pole being positioned at the 3rd bidirectional triode thyristor of rearmost end is connected to the control pole of the second bidirectional triode thyristor by high frequency circuits for triggering 201; The control pole of the second bidirectional triode thyristor is connected to the control pole of the first bidirectional triode thyristor by another high frequency circuits for triggering 201; The control pole being positioned at the first bidirectional triode thyristor is foremost connected to the output of fluorescent tube simulation cathode circuit again by another high frequency circuits for triggering 201.
In safety protective circuit shown in Fig. 6, high frequency circuits for triggering 201 comprise the 3rd electric capacity C3, and the capacitance span of the 3rd electric capacity C3 is 1P-10 μ F; Or high frequency circuits for triggering 201 are made up of the 6th electric capacity C6 mutually connected and the 7th electric capacity C7, the capacitance span of the 6th electric capacity C6 and the 7th electric capacity C7 is 1P-10 μ F; Or high frequency circuits for triggering 201 are made up of the 8th electric capacity C8 be connected in series and the 9th resistance R9, the capacitance span of the 8th electric capacity C8 is 1P-10 μ F, and the span of the 9th resistance R9 is 1 Ω-10 Ω.The detailed description of high frequency circuits for triggering 201 principle refers to foregoing embodiments, does not repeat them here.
In safety protective circuit shown in Fig. 6, fluorescent tube simulation cathode circuit principle consults foregoing embodiments, and each component parameter value also consults foregoing embodiments, does not repeat them here.
In electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit 200 shown in Fig. 6; further; also comprise the buffer circuit resistance via for maintaining system small area analysis operating state, the principles illustrated of buffer circuit resistance via also refers to foregoing embodiments, does not repeat them here.
Present invention also offers a kind of embodiment of electronic type substituted type double end and straight tube LED daylight lamp, as shown in Figure 7, consult Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 simultaneously, this electronic type substituted type double end and straight tube LED daylight lamp is driven by electronic ballast for fluoresent lamp 100, comprises the rectifier filter circuit 300 be connected with LED group 400; Wherein, the safety protective circuit 200 described in aforementioned any embodiment is connected with between the output of electronic ballast for fluoresent lamp 100 and rectifier filter circuit 300.This safety protective circuit 200 plays the effect of safety switch between the output and rectifier filter circuit 300 of electronic ballast for fluoresent lamp; and this safety switch is the safety switch to frequency sensitive; disconnect under low frequency (power frequency 50/60Hz) state, conducting under high frequency (being greater than 10k Hz) state.Wherein, safety protective circuit 200 operation principle, see foregoing embodiments, does not repeat them here.
In the electronic type substituted type double end and straight tube LED daylight lamp of above-described embodiment, be different from current trigger mode during general use, make use of the frequency trigger characteristic of bidirectional triode thyristor SCR cleverly, carrying out safety standard test or in user installation LED daylight lamp process, safety protective circuit can make both-end LED lamp tube two ends insulation resistance be greater than 2M Ω, when applying AC1500V, 50/60Hz voltage in lamp tube ends, there will not be flicker and punch-through; When one end adds AC500V, 50/60Hz power supply wherein simultaneously, the pick-up current of the anthropological measuring network that other end access IEC 60598-1 annex G specifies is less than 0.7mA.
Therefore, adopt electronic type substituted type double end and straight tube LED daylight lamp of the present invention, in replacement installation process with when normally working, electric shock accidents can not occur and damage fluorescent tube, thus guaranteeing the person and property safety.Meanwhile, both-end LED daylight lamp can not be changed the fluorescent lighting lamp circuit of primary electron ballast driven and directly substitute fluorescent tube, reach energy-conservation, safety, environmental protection and long-lived operation object.
In the electronic type substituted type double end and straight tube LED daylight lamp of above-described embodiment; as depicted in figs. 1 and 2; the live wire end L of electronic ballast for fluoresent lamp 100 and zero line side N accesses city alternating current AC, and (voltage is 220V; frequency is 50Hz or 60Hz); electronic ballast for fluoresent lamp 100 exports safety protective circuit 200 of the present invention to after electric main AC being converted to high-frequency alternating current by the AC-DC patent circuit of its inside and DC-AC change-over circuit, and its current frequency range is 20KHz-80KHz.
In above-described embodiment, as depicted in figs. 1 and 2, rectifier filter circuit 300 comprises the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 and electric capacity Co; Wherein, by the 7th resistance R7, (or the 3rd resettable fuse P3, is connected in series the first diode D1 and the second diode D2 as shown in Figure 5); 3rd diode D3 and the 4th diode D4 by the July 1st resistance R7 ' (or the 31 resettable fuse P3 ', is connected in series as shown in Figure 5); The negative pole of the first diode D1 connects the negative pole of the 3rd diode D3, and the positive pole of the second diode D2 connects the positive pole of the 4th diode D4; The second plate of bidirectional triode thyristor SCR is connected to the tie point place of the first diode D1 and the 7th resistance by the 4th electric capacity C4; The second plate of bidirectional triode thyristor SCR is connected to the tie point place of the second diode D2 and the 7th resistance simultaneously by the 5th electric capacity C5; Electric capacity Co is connected between the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4.
Preferably, above-mentioned LED group 400 two ends are connected in parallel to the piezo-resistance of 100V-200V, and to prevent user from fluorescent tube is accessed electric inductance type fluorescent lamp tool by mistake, the LED lamp bead avoiding starter (jump bubble) disconnection moment back-emf to cause is damaged.
Preferably, in above-mentioned electronic type substituted type double end and straight tube LED daylight lamp, as shown in Figure 7, consult Fig. 1 and Fig. 2, rectifier filter circuit 300 is arranged in two lamp holders 501 of electronic type substituted type double end and straight tube LED daylight lamp with the form of the first modules A simultaneously; Safety protective circuit 200 is arranged in two lamp holders 501 of electronic type substituted type double end and straight tube LED daylight lamp with the form of the second module B, and two lamp holder inner structures are symmetrical; The first modules A wherein in the lamp holder of one end is electrically connected by screw thread copper post 504 with between the second module B, and screw thread copper post 504 is connected to the two ends of the 7th resistance R7, or screw thread copper post 504 is connected to the two ends of the 3rd resettable fuse P3.
In the electronic type substituted type double end and straight tube LED daylight lamp of above-described embodiment, as shown in Figure 1, LED group 400 is connected in parallel by multiple LED luminescence unit (L1-Ln) and forms, the input of multiple LED luminescence unit (L1-Ln) is connected to the output of rectifier filter circuit 300 jointly, the output of multiple LED luminescence unit (L1-Ln) is connected to the loop end of rectifier filter circuit 300 jointly, and each LED luminescence unit is connected in series by multiple LED chip.Wherein, the quantity span of multiple LED luminescence unit (L1-Ln) is 2-20; In each LED luminescence unit, the quantity span of multiple LED chip is 10-50.
Glass tube 503 overall length of the electronic type substituted type double end and straight tube LED daylight lamp of above-described embodiment is preferably 1178mm or 1478mm, and lamp bar 502 length is preferably 1170mm or 1466mm; Lamp holder 501 lengthens 6mm, in order to avoid naked wire or dark space, lamp holder place.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (10)
1. an electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit, it is characterized in that, comprise the fluorescent tube simulation cathode circuit of the first output (1) and the second output (2) being connected to electronic ballast for fluoresent lamp (100); Wherein, the output of described fluorescent tube simulation cathode circuit is connected with the first anode of a bidirectional triode thyristor (SCR), and the second plate of described bidirectional triode thyristor (SCR) is connected to the input of the rectifier filter circuit (300) of double end and straight tube LED daylight lamp by the 4th electric capacity (C4) and the 5th electric capacity (C5);
The high frequency circuits for triggering (201) of triggering and conducting under the high frequency state being greater than 10kHz are provided with between the output that cathode circuit simulated by the control pole of described bidirectional triode thyristor (SCR) and described fluorescent tube;
Or, for there is the open-circuit condition of distributed capacitance between the output that cathode circuit simulated by the control pole of described bidirectional triode thyristor (SCR) and described fluorescent tube;
3rd output (3) of described electronic ballast for fluoresent lamp (100) and the circuit of the 4th output (4) arrange and arrange symmetrical with the circuit of described first output (1) and described second output (2).
2. safety protective circuit according to claim 1, is characterized in that, described high frequency circuits for triggering (201) comprise the 3rd electric capacity (C3), and the capacitance span of described 3rd electric capacity (C3) is 1P-10 μ F;
Or, described high frequency circuits for triggering (201) are made up of the 6th electric capacity (C6) of mutually connecting and the 7th electric capacity (C7), and the capacitance span of described 6th electric capacity (C6) and the 7th electric capacity (C7) is 1P-10 μ F;
Or, described high frequency circuits for triggering (201) are made up of the 8th electric capacity (C8) be connected in series and the 9th resistance (R9), the capacitance span of the 8th electric capacity (C8) is 1P-10 μ F, and the span of described 9th resistance (R9) is 1 Ω-10 Ω;
Described bidirectional triode thyristor (SCR) is for 1-5A and be withstand voltagely greater than 1KV.
3. safety protective circuit according to claim 1, it is characterized in that, the first resistance (R1) between described first output (1) of electronic ballast for fluoresent lamp (100) and described second output (2) and the second resistance (R2) is connected to after described fluorescent tube simulation cathode circuit comprises series connection mutually, described first resistance (R1) two ends are connected in parallel to the first electric capacity (C1), and described second resistance (R2) two ends are connected in parallel to the second electric capacity (C2); Wherein,
Tie point between described first resistance (R1) and described second resistance (R2) is the output of described fluorescent tube simulation cathode circuit.
4. safety protective circuit according to claim 3, is characterized in that, described first resistance (R1) and described second resistance (R2) span are 1 Ω-1k Ω;
Described first electric capacity (C1) and described second electric capacity (C2) span are 0.01 μ F-10 μ F;
Described 4th electric capacity (C4) and described 5th electric capacity (C5) span are 0.01 μ F-50 μ F.
5. safety protective circuit according to claim 1, it is characterized in that, after described fluorescent tube simulation cathode circuit comprises series connection mutually, be connected to the first resettable fuse (P1) between described first output (1) of electronic ballast for fluoresent lamp and described second output (2) and the second resettable fuse (P2);
Tie point between described first resettable fuse (P1) and described second resettable fuse (P2) is the output of described fluorescent tube simulation cathode circuit;
Described first resettable fuse (P1) and described second resettable fuse (P2) current parameters span are 0.25-2A.
6. safety protective circuit according to claim 1, is characterized in that, described safety protective circuit (200) also comprises the buffer circuit resistance via for maintaining system small area analysis operating state, comprising:
Be connected to the 3rd resistance (R3) between first output (1) of described electronic ballast for fluoresent lamp (100) and the second plate of described bidirectional triode thyristor (SCR);
Be connected to the 4th resistance (R4) between second output (2) of described electronic ballast for fluoresent lamp (100) and the second plate of described bidirectional triode thyristor (SCR);
Be connected in the 5th resistance (R5) at described 4th electric capacity (C4) two ends in parallel; And, be connected in the 6th resistance (R6) at described 5th electric capacity (C5) two ends in parallel;
Wherein, described 3rd resistance (R3), described 4th resistance (R4), described 5th resistance (R5) and described 6th resistance (R6) span are 1M Ω-10M Ω.
7. an electronic type substituted type double end and straight tube LED daylight lamp safety protective circuit, it is characterized in that, comprise the fluorescent tube simulation cathode circuit of the first output (1) and the second output (2) being connected to electronic ballast for fluoresent lamp (100), wherein, the output of described fluorescent tube simulation cathode circuit is connected in series with by least two and the bidirectional triode thyristor group (SCR ') that the identical bidirectional triode thyristor (SCR) of model forms connects, the first anode being positioned at bidirectional triode thyristor foremost in described bidirectional triode thyristor group (SCR ') is connected with the output that cathode circuit simulated by described fluorescent tube, the second plate being positioned at the bidirectional triode thyristor of rearmost end in described bidirectional triode thyristor group (SCR ') is connected to the input of the rectifier filter circuit (300) of double end and straight tube LED daylight lamp by the 4th electric capacity (C4) and the 5th electric capacity (C5),
In described bidirectional triode thyristor group (SCR '), the control of each bidirectional triode thyristor is extremely all connected with the high frequency circuits for triggering (201) of triggering and conducting under the high frequency state being greater than 10kHz; Wherein, the control pole being positioned at the bidirectional triode thyristor of rear end is electrically connected with the control pole of the bidirectional triode thyristor of adjacent headend by described high frequency circuits for triggering (201), and the control pole being positioned at bidirectional triode thyristor is foremost electrically connected with the output that cathode circuit simulated by described fluorescent tube by described high frequency circuits for triggering (201);
Or, between the output that in described bidirectional triode thyristor group (SCR '), the control pole of each bidirectional triode thyristor is and cathode circuit simulated by described fluorescent tube, there is the open-circuit condition of distributed capacitance;
3rd output (3) of described electronic ballast for fluoresent lamp (100) and the circuit of the 4th output (4) arrange and arrange symmetrical with the circuit of described first output (1) and described second output (2).
8. an electronic type substituted type double end and straight tube LED daylight lamp, is driven by electronic ballast for fluoresent lamp (100), comprises the rectifier filter circuit (300) be connected with LED group (400); It is characterized in that, between the output of described electronic ballast for fluoresent lamp (100) and described rectifier filter circuit (300), be connected with the safety protective circuit (200) according to any one of claim 1-7.
9. electronic type substituted type double end and straight tube LED daylight lamp according to claim 8, it is characterized in that, described rectifier filter circuit (300) comprises the first diode (D1), the second diode (D2), the 3rd diode (D3) and the 4th diode (D4) and electric capacity (Co);
Wherein, described first diode (D1) and described second diode (D2) are connected in series by the 7th resistance (R7) or the 3rd resettable fuse (P3);
Described 3rd diode (D3) and described 4th diode (D4) are connected in series by the resistance July 1st (R7 ') or the 31 resettable fuse (P3 ');
The negative pole of described first diode (D1) connects the negative pole of described 3rd diode (D3), and the positive pole of described second diode (D2) connects the positive pole of described 4th diode (D4);
The second plate of described bidirectional triode thyristor (SCR) is connected to the tie point place of described first diode (D1) and described 7th resistance (R7) by described 4th electric capacity (C4);
The second plate of described bidirectional triode thyristor (SCR) is connected to the tie point place of described second diode (D2) and described 7th resistance (R7) simultaneously by described 5th electric capacity (C5);
Described electric capacity (Co) is connected between the negative pole of described 3rd diode (D3) and the positive pole of described 4th diode (D4);
Described electric capacity (Co) two ends are connected in parallel to piezo-resistance (R8).
10. electronic type substituted type double end and straight tube LED daylight lamp according to claim 9, it is characterized in that, described rectifier filter circuit (300) is arranged in two lamp holders (501) of electronic type substituted type double end and straight tube LED daylight lamp with the form of the first module (A);
Described safety protective circuit (200) is arranged in two lamp holders (501) of described electronic type substituted type double end and straight tube LED daylight lamp with the form of the second module (B), and two lamp holders (501) inner structure is symmetrical;
Described first module (A) wherein in one end lamp holder (501) is electrically connected by screw thread copper post (504) with between described second module (B), described screw thread copper post (504) is connected to the two ends of described 7th resistance (R7), or described screw thread copper post (504) is connected to the two ends of described 3rd resettable fuse (P3).
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| CN201510023550.XA CN104540304B (en) | 2015-01-16 | 2015-01-16 | Electronic replacement-type double-end straight-tube LED fluorescent lamp and safety protection circuit thereof |
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| CN106102290A (en) * | 2016-08-02 | 2016-11-09 | 欧普照明股份有限公司 | A kind of device based on electronic ballast control electronic control circuit and lighting |
| CN106304522A (en) * | 2015-05-22 | 2017-01-04 | 讯强电子(惠州)有限公司 | General-purpose type light-emitting diode lamp tube, power-supply system and LED driving circuit |
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| CN107529713A (en) * | 2017-07-27 | 2018-01-02 | 邓树兴 | Universal LED fluorescent tube and its module |
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| US10674586B1 (en) | 2019-10-22 | 2020-06-02 | Jiangxi Jingke Electronics Co., Ltd. | Universal LED tube and module thereof |
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