CN100486401C - DC type fluorescent lamp light-regulator - Google Patents
DC type fluorescent lamp light-regulator Download PDFInfo
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- CN100486401C CN100486401C CNB2004100596656A CN200410059665A CN100486401C CN 100486401 C CN100486401 C CN 100486401C CN B2004100596656 A CNB2004100596656 A CN B2004100596656A CN 200410059665 A CN200410059665 A CN 200410059665A CN 100486401 C CN100486401 C CN 100486401C
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Abstract
Being for substituting ballast, the light modulator operates under DC state, possessing features of stable brightness, light changes in stepless and wide suitable voltage range. Under user's control, ratio between maximum power and minimum power of the fluorescent lamp is larger than 10. Equal energy feeding technique with characteristics of adjustment in advance is adopted in the adjustable switch type DC equipower source as core set in the invention. The said DC equipower source restrains disturbance effect on output caused by ripple in input power source. The invention raises stability of system and lowers cost and size of system so as to suit fluorescent lamp family as a load of having negative resistance characteristic especially.
Description
(1) technical field
Technical field under the present invention is an electric lighting equipment.More particularly, the present invention relates to a kind of switching mode DC stable power supply that the fluorescent lamp direct current can be lighted.
(2) background technology
The various switching mode DC stable power supply of extensive use have a common feature, that is exactly: when the operating state generation deviation of load, it adjusts circuit changes switch conduction in the stabilized power supply according to the control information of feedback time, thereby the energy that control input power supply provides makes the work of load approach predetermined state.But for certain input or load, the response of system often presents oscillating characteristic, because the effect of feedback just might make the vibration aggravation, even can not work.To this, in conventional art, nearly all the DC power supply in the system is carried out filtering, in the hope of the ripple that reduces input voltage perturbation action to system with jumbo electrochemical capacitor.
Because inductance element energy storage at a time is only relevant with this current value constantly with its inductance value.So, when the employing of the energy storage inductor element in energy converter paralleling switch, when anti-sharp mode is worked, just available method of fixing its electric current maximum made in each energy conversion cycle, can both obtain identical energy from the input power supply, and with new electric energy form output.Therefore, according to the operating state of the value of energy storage inductor electric current decision energy converter, can suppress to import disturbance composition in the power supply synchronously to the influence of loaded work piece state, promptly the homenergic feeding technique has the characteristics of leading adjusting.
In order to adjust the brightness of fluorescent lamp on a large scale, just need adjustable switching mode DC stable power supply on a large scale.Usually, the excursion of output is big more, and the maximum of damping loss will increase severely.This be because: classical damping do not have the detection system current state and the decision oneself state function.
Intelligent damping link among the present invention just plays a role when only being in certain specific state in system, only the power consumption that may cause system parasitic oscillation to occur is fallen.
(3) summary of the invention
The objective of the invention is to adopt the homenergic feeding technique, develop a kind of switching mode DC stable power supply, this power supply is driving fluorescent lamp directly, makes fluorescent lamp operation at dc state and send light stable, the adjustable brightness of user.
The core of technical solution of the present invention is a homenergic feed-type switching mode DC stable power supply, because fluorescent lamp is a Special Category in its load.Below will be with this technical scheme of character introduction.
1. system configuration
The once-through type fluorescent dimmer, parts such as classical input power conversion 1, control input 2, output comparison 4, pulse-width modulator 5, energy conversion 6, out-put supply conversion 7 have been quoted, increased parts such as input comparison 3, intelligent damping 8, fast precise feedback 9, concrete technical scheme is as described below.
The city electrically connects the input of input power conversion 1, the output of input power conversion 1 connects the detection input of input comparison 3 and the power input of energy conversion 6, the output of control input 2 connects input relatively 3 and output 4 reference input relatively, input relatively 3 output connects first input of pulse-width modulator 5, and output relatively 4 output connects second input of pulse-width modulator 5; The output of pulse-width modulator 5 connects the control input end of energy conversion 6, the output of energy conversion 6 connects the input of out-put supply conversion 7 and intelligent damping 8, the output of out-put supply conversion 7 connects the input of load and fast precise feedback 9, and the output of fast precise feedback 9 connects relatively 4 detection input of output; In above-mentioned parts, the direct voltage of exporting after 1 pair of commercial power rectification of input power conversion, the filtering is the main power source of system; Control input 2 is interface units of user's control system running status, it is parts of detection system input power source change situation that input compares 3, it is parts of detection system out-put supply situation of change that output compares 4, pulse-width modulator 5 is parts of output control pulse sequence, energy conversion 6 is the parts that the direct current energy of input converted to pulse electric energy output, out-put supply conversion 7 is the parts that pulse electric energy converted to direct current energy, intelligent damping 8 is parts that parasitic oscillation appears in anti-locking system, and fast precise feedback 9 is parts that the out-put supply of system is taken a sample; The operation principle of native system is: control input 2 is according to the output energy of user's expection, and corresponding system operation reference voltage is passed to input relatively 3 and output relatively 4; No matter how high the voltage of input power conversion 1 output is, input relatively 3 all will be adjusted the operating state of pulse-width modulator 5 according to the difference degree of its sampling value and reference voltage; The output value of out-put supply conversion 7 by fast precise feedback 9 sampling quickly and accurately, sends output to and compares 4, and output is 4 difference degrees according to this sampling and reference voltage relatively, adjusts the operating state of pulse-width modulator 5; In input relatively 3 and output relatively under 4 the common influence, the pulse of the appropriate width of pulse-width modulator 5 outputs, make energy conversion 6 in each energy conversion cycle, can both obtain the energy of user's expection from input power conversion 1, and with new electric energy form output; During pulse-width modulator 5 output pulses, energy conversion 6 beginning energy reserves, intelligent damping 8 is off state; During pulse-width modulator 5 no-output pulses, energy conversion 6 begins the energy storage of releasing, the pulse electric energy that energy conversion 6 is released in out-put supply conversion 7 converts direct current energy to the load work done, and when the energy storage of energy conversion 6 all released out, intelligent damping 8 just started damping function.
The cycle of present embodiment utilization homenergic feeding technique and fixed energies conversion, the power output that is obtained is continuously adjustable switching mode direct current constant power power supply between 3 watts～36 watts, can make fluorescent lamp operation at dc state and send the stable luminous flux that can be scheduled to.The technical scheme of each functional part in the following introducing system structure.In elaboration, not really important known technology has been carried out suitable simplification, given nodal scheme " Ec, Vo, Vx, Vr, Vcc " etc. to the numerous node of branch road.Attention: node Ec is the common port of the input and output of a plurality of parts.
2. import power conversion 1
Input power conversion 1 has been quoted classical converter technique, with the direct voltage of civil power conversion into about 260 volts; For system can be started voluntarily, also needing to start first resistance 11 and first electrolytic capacitor filter 12 provides accessory power supply to control circuit; Concrete technical scheme is, the positive pole of input power conversion 1 output dc voltage connects first terminal of first resistance 11, and the label of this node is Ec; Second terminal of first resistance 11 connects the positive pole of first electrochemical capacitor 12, and this node is the positive pole of first accessory power supply of system, and its nodal scheme is Vcc; The negative pole of the negative pole of the negative pole of first accessory power supply---first electrochemical capacitor 12 and input power conversion 1 output dc voltage connects this machine ground in the lump.
3. the control input 2
In order to make fluorescent lamp under the situation of low-light level, good working order is also arranged, need take to start measure by force---between the variable terminal of potentiometer 22 and ground and connect a capacitor that capacity is appropriate.
4. input compares 3
The classic applications scheme of first integrated circuit 17 is not adopted in input comparison 3, but with the organic assembling of the primary current comparator of first integrated circuit 17 inside and primary voltage error amplifier and external the 3rd resistance 15, the 4th resistance 16, concrete technical scheme is as follows.
Input is 3 detection input relatively---and the tripod of first integrated circuit 17 connects the exciting curent signal output part of energy conversion 6, variable reference Vx connects first terminal of the 3rd resistance 15, second terminal of the 3rd resistance 15 connects first terminal and the input of the 4th resistance 16 and compares 3 reference input---the crus secunda of first integrated circuit 17, and second terminal of the 4th resistance 16 connects first pin of first integrated circuit 17; In the inside of first integrated circuit 17, the primary voltage error amplifier only amplifies variable reference Vx signal, and input relatively 3 output connects with first input of pulse-width modulator 5; The operation principle of these parts is: first integrated circuit 17 Central Plains voltage error amplifier and the 3rd resistance 15, the 4th the anti-phase proportional amplifier that resistance 16 constitutes, set the reference voltage terminal of first integrated circuit 17 internal current comparator according to the value of variable reference Vx; When first detected exciting curent signal of integrated circuit 17 tripods during greater than this reference value, input relatively 3 forces pulse-width modulator 5 output low level at once, in the hope of the maximum of restriction exciting curent, realizes the homenergic feed; When first detected exciting curent signal of integrated circuit 17 tripods during less than this reference value, input is 3 operating states that can not influence pulse-width modulator 5 relatively.
Experiment shows: improve relatively 3 switching speed of input, can reduce the influence of the ripple of input power supply to output.
5. the fast precise feedback 9
Fast precise feedback 9 is made of the 8th resistance 31, the 9th resistance 32, the 34, the 11 resistance 35 of the tenth resistance, the value of the 8th resistance 31 equals the value of the tenth resistance 34, and the value of the 9th resistance 32 equals the value of the 11 resistance 35; These parts Duo a reference input than the differential circuit of both-end input both-end output, not only have high common-mode rejection ratio, and the speed of output voltage feedback and accuracy all have lifting significantly than classical circuit.The output that concrete technical scheme is asked for an interview subsequently compares 4.
6. output compares 4
Nodal scheme is anodal first terminal that connects the tenth resistance 34 of system's output voltage of Vo, second terminal of the tenth resistance 34 connects first terminal of the 11 resistance 35 and the 5th pin of second integrated circuit 36, second terminal ground connection of the 11 resistance 35, nodal scheme is first terminal that system's output voltage negative pole of Ec connects the 8th resistance 31, second terminal of the 8th resistance 31 connects first terminal of the 9th resistance 32 and the 6th pin of second integrated circuit 36, second terminal of the 9th resistance 32 connects the anode of first diode 33, the minus earth of first diode 33, fixed reference Vr connects the octal of second integrated circuit 36 and first terminal of the 12 resistance 37, second terminal of the 12 resistance 37 connects the 7th pin of second integrated circuit 36 and the anode of second diode 38, the 4th pin ground connection of second integrated circuit 36, output is 4 output relatively---and the negative electrode of second diode 38 connects second input of pulse-width modulator 5.In this link, fixed reference Vr makes the control information of second integrated circuit, 36 outputs stable, reliable, and first diode 33 provides protection point corresponding reference level, and second diode 38 is protection switches; The operation principle of this link is: when the ratio of the voltage (Vo-Ec) at load two ends and first diode 33 anode voltage during less than the ratio of the 8th resistance 31 and the 9th resistance 32, second integrated circuit 36 output low level, second diode 38 turn-offs at this moment, and the operating state of pulse-width modulator 5 compares 4 with output and has nothing to do; Voltage when the load two ends transfinites; when being it with the ratio of first diode 33 anode voltage greater than the ratio of the 8th resistance 31 and the 9th resistance 32; second integrated circuit 36 output high level; second diode 38 conducting this moment; pulse-width modulator 5 is output low level at once, and system enters guard mode.
Experiment shows: improve the switching speed of output comparing element, can reduce the ripple of system's output voltage.
7. pulse-width modulator 5
Pulse-width modulator 5 has adopted the classic applications scheme of first integrated circuit 17 basically, second timing resistor 13 and second timing capacitor 14 have determined the cycle of pulse-width modulator 5 output pulse sequences, and the 6th pin of first integrated circuit 17 is outputs of pulse-width modulator 5; In the present embodiment, second input of pulse-width modulator 5 and input be 3 the public terminal of reference input---the crus secunda of first integrated circuit 17 relatively, and this is the difference of itself and classic applications scheme; 5 two inputs of pulse-width modulator are to the mechanism that influences of output state, input comparison 3 and the output introduced were in the above relatively set forth in 4 liang of joints, here repeat no more: output square-wave pulse when the state of pulse-width modulator 5 is not influenced by input, pulse-width modulator 5 is parts of direct control energy conversion 6 operating states.
8. energy conversion 6
The anodal Ec of input power conversion 1 output dc voltage connects first terminal of the 13 resistance 41, second terminal of the magnetic energy signal output part of energy conversion 6---the 13 resistance 41 connects first terminal of switch transformer 44 former limit windings, second terminal of switch transformer 44 former limit windings connects the accessory power supply input of intelligent damping 8, nodal scheme is first energy output of the energy conversion 6 of D---the 3rd terminal of switch transformer 44 former limit windings connects drain electrode and first energy input of out-put supply conversion 7 and first damping input of intelligent damping 8 of first field effect transistor 42, the source electrode of the exciting curent signal output part of energy conversion 6---first field effect transistor 42 connects first terminal of the 14 resistance 43, second terminal ground connection of the 14 resistance 43, the grid of the control input end of energy conversion 6---first field effect transistor 42 connects the output of pulse-width modulator 5, first terminal of switch transformer 44 secondary windings connects the anode of the 3rd diode 45, the negative electrode of the 3rd diode 45 connects the first accessory power supply VCC, second terminal ground connection of switch transformer 44 secondary windings; In these parts, node Ec is the common port of the energy input and output of energy conversion 6; The voltage at the 13 resistance 41 two ends is used for describing the present situation of magnetic energy in the switch transformer 44; First and second two terminals of switch transformer 44 former limit windings provide the energy for the control circuit in the intelligent damping 8; The electronic switch of first field effect transistor 42 for magnetizing to switch transformer 44; Switch transformer 44 secondary winding networks are given the first accessory power supply VCC makeup energy, guarantee with first integrated circuit 17 to be that the control core circuit can stably be worked; The operation principle of these parts is: during pulse-width modulator 5 output high level, first field effect transistor 42 saturation conduction, source current returns the negative pole of power supply by set out former limit winding by the 13 resistance 41 and switch transformer 44, first field effect transistor 42 and the 14 resistance 43 of Ec, the magnetic energy that switch transformer 44 stores increases along with the linearity of exciting curent and increases sharply, and the exciting curent signal of the magnetic energy signal of the 13 resistance 41 outputs and the 14 resistance 43 outputs is also increasing; During pulse-width modulator 5 output low levels, first field effect transistor 42 ended, the magnetic energy that is stored in switch transformer 44 is released to out-put supply conversion 7 from output node D with the form of pulse current, along with reducing gradually of switch transformer 44 former limit winding currents, the magnetic energy signal of the 13 resistance 41 outputs is also more and more littler, when the electric current of switch transformer 44 former limit windings reduces to zero, the magnetic energy that shows storage in the switch transformer 44 has all released out, and after this system enters new state (referring to intelligent damping 8).
Experiment shows: the switching speed of first field effect transistor 42 is high more, and the ripple of input power supply is just more little to the influence of output.
9. the out-put supply conversion 7
Out-put supply conversion 7 is the circuit that the fluorescent lamp direct current is lighted in the present embodiment, and it is made of the 4th diode 51 and the 3rd electric capacity 52 and fluorescent lamp 53.Concrete technical scheme is as follows: first energy output D of energy conversion 6 connects the anode of the 4th diode 51, nodal scheme is the positive pole of out-put supply conversion 7 output dc voltages of Vo---the negative electrode of the 4th diode 51 connects first terminal of the 3rd electric capacity 52 and a terminal of fluorescent lamp 53 1 ends, and second terminal of the negative pole of out-put supply conversion 7 output dc voltages---the 3rd electric capacity 52 connects the terminal of fluorescent lamp 53 other ends and the energy input and output common port Ec of energy conversion 6; In these parts, node Ec is the common port of the energy input and output of out-put supply conversion 7; The operation principle of these parts is: when fluorescent lamp 53 is not luminous, the magnetic energy that energy conversion 6 is released only becomes electric energy and is stored in the 3rd electric capacity 52, make the direct voltage at the 3rd electric capacity 52 two ends rise rapidly, when the direct voltage at the 3rd electric capacity 52 two ends reaches the puncture voltage of mercury vapour in the fluorescent lamp 53, the avalanche type discharging current of its generation is drop-down rapidly the direct voltage at the 3rd electric capacity 52 two ends, and meanwhile fluorescent lamp 53 also begins luminous; After fluorescent lamp 53 is luminous, if energy conversion 6 let out can during replenish for the 3rd electric capacity 52 electric energy equal energy conversion 6 at the 3rd electric capacity 52 during the energy storage during to electric energy that fluorescent lamp 53 discharges, the ripple voltage at the 3rd electric capacity 52 two ends no longer changes, and fluorescent lamp 53 just sends stable luminous flux.
Experiment shows: the reverse recovery time of the 4th diode 51 is more little, and system is just low more to the requirement of antihunt circuit, and efficient is also high more.
10. intelligent damping 8
Intelligent damping 8 comprises the 69, the 18 resistance 70 of the 7th diode; For guaranteeing that damping action only occurs over just; When the magnetic energy of energy conversion 6 storage all releases out, when it begins energy storage once more during in; Intelligent damping 8 has increased the 3rd integrated circuit 68 that model is NE555, second triode 67, the 3rd field effect transistor 71, the 5th diode 63, voltage-stabiliser tube 64, the 4th electrochemical capacitor 65, the 15 resistance 61, the 16 resistance 62, the 17 element such as resistance 66.Concrete technical scheme is as described below.
The energy source terminal that energy conversion 6 provides for second accessory power supply connects first terminal of the 15 resistance 61, second terminal of the 15 resistance 61 connects the anode of the 5th diode 63, the negative electrode of the positive pole of second accessory power supply---the 5th diode 63 connects the negative electrode of the positive pole of the 4th electrochemical capacitor 65 and voltage-stabiliser tube 64 with first terminal of the 17 resistance 66 and the octal of the 3rd integrated circuit 68, the negative pole of the negative pole of second accessory power supply---the 4th electrochemical capacitor 65 connects anode and first pin of the 3rd integrated circuit 68 and the common port Ec of energy conversion 6 of voltage-stabiliser tube 64, the magnetic energy signal output part of energy conversion 6 connects first terminal of the 16 resistance 62, second terminal of the 16 resistance 62 connects second terminal of the 17 resistance 66 and the base stage of second triode 67, the emitter of second triode 67 connects the 4th pin of the 3rd integrated circuit 68, and the collector electrode of second triode 67 connects the crus secunda of the 3rd integrated circuit 68, the source electrode of the 6th pin and the 3rd field effect transistor 71 and the common port Ec of energy conversion 6; The tripod of the 3rd integrated circuit 68 connects the grid of the 3rd field effect transistor 71; The 3rd field effect transistor 71 drain electrodes connect second terminal of the 18 resistance 70, and first terminal of the 18 resistance 70 connects the negative electrode of the 7th diode 69, and the anode of the 7th diode 69 connects first energy output D of energy conversion 6; In these parts, node Ec also is the common port of intelligent damping 8; 61 metering functions of the 15 resistance, second accessory power supply that voltage-stabiliser tube 64 participates in also provides normative reference for detecting the magnetic energy signal exactly, and second triode 67 and the 3rd integrated circuit 68 constitute the strong same phase comparator of high sensitivity of driving force; The 3rd field effect transistor 71 served as damper switch, 70 damping actions of the 18 resistance, and the 7th diode 69 can prevent that the 3rd field effect transistor 71 from damaging because of unusual conducting during the energy storage of energy conversion 6; The operation principle of these parts is: the magnetic energy signal of energy conversion 6 outputs, by the base stage of giving second triode 67 after the 62, the 17 resistance 66 translations of the 16 resistance, the decay; Energy conversion 6 is during energy storage, the 7th diode 69 is applied in reverse voltage and ends, meanwhile the magnetic energy signal along with energy conversion 6 outputs strengthens gradually, the base potential of second triode 67 descends gradually, when second triode 67 produces base current, the 3rd integrated circuit 68 output low levels, the 3rd field effect transistor 71 ended, and the 18 resistance 70 is off state; When energy conversion 6 begins to let out energy, though the 7th diode 69 is applied in forward voltage, but powerful magnetic energy signal makes second triode 67 still keep conducting, the 3rd field effect transistor 71 still is in cut-off state, so electric current can not occur in the 18 resistance 70, when being reduced to zero gradually along with the magnetic energy signal, the base potential of second triode 67 rises gradually and base current is reduced to zero gradually, the 3rd integrated circuit 68 output high level when second triode 67 ends, the 3rd field effect transistor 71 conductings, the 18 resistance 70 begins to consume the 4th reverse current that diode 51 occurs in the out-put supply conversion 7 in reverse recovery time---prevent that this current feedback is to energy conversion 6.
On engineering,, should open damping function in a certain moment that energy conversion 6 is let out before finishing in order to overcome the time-delay characteristics of device.
11. useful effect
The switching mode direct current constant power power supply that present embodiment is introduced has suppressed the perturbation action of the ripple of input supply voltage to system greatly, has both improved the stability of system, has reduced the cost and the volume of system again, is particularly suitable for the constant load of rated power.For example incandescent lamp is connected on this power supply,, no matter the nominal operation voltage of incandescent lamp is much, all can exports corresponding luminous flux so because obtaining identical electrical power as long as configure the power output of power supply.Even if for the load that fluorescent lamp one class has negative resistance charactertistic, this power supply also can make its stable work.
Intelligent damping technology among the present invention both can prevent that parasitic oscillation from appearring in energy conversion 6---the assurance system normally moves, and has reduced damping loss and the temperature rise and the use cost of system again.
Fast precise feedback technique among the present invention, its feedback speed and feedback accuracy all are higher than conventional solution, and particularly its long-term stability is fine.This is highly significant for some application.
Utilization homenergic feeding technique can construct various concrete, practical switching mode DC stable power supply.For example: in order to overcome the non-ideal characteristic of device, make the ripple of system's output voltage do not imported the influence of power-supply fluctuation composition, can use ripple stabilized voltage power supplys such as the homenergic feeding technique constructs.Concrete method is: pulse-width modulator 5 only is made of the R-S trigger, the output of R-S trigger connects the control input end of energy conversion 6, input relatively 3 output connects 0 end of putting of R-S trigger, and output relatively 4 output connects 1 end of putting of R-S trigger.Its operation principle is: output voltage is during less than set point, and output relatively 4 makes R-S trigger output high level, and energy conversion 6 obtains energy from the input power supply; When the energy storage of energy conversion 6 reached requirement, input relatively 3 made R-S trigger output low level, and energy conversion 6 is to the load energy of releasing.
Set forth the homenergic feeding technique with paralleling switch type DC power supply above.Experiment shows; the homenergic feeding technique also is suitable for tandem tap type DC power supply; but need leave out first diode 33 and second terminal of the 9th resistance 32 is connected to variable reference Vx node, make output relatively 4 become the overproof protection link of output, move to guarantee system stability ground.In this application, the organic assembling of available four integrated comparator LM339 and four NAND gate CD4011 replaces UC3845, to reduce the power consumption of accessory power supply.
(4) drawing explanation
For ease of differentiating copy editor's mistake, make technical scheme of the present invention more directly perceived, more detailed, a cover can invest after the specification by complete embodiment circuit diagram of the present invention.In the accompanying drawings, not really important known technology has been carried out suitable simplification, replaced with nodal scheme " Ec, Vo, Vx, Vr, Vcc " having a strong impact on the clean and tidy electric tie of drawing.
Fig. 1 is the basic block diagram of homenergic feed-type switching mode DC stable power supply;
Fig. 2 is an once-through type fluorescent dimmer schematic diagram;
Fig. 3 is intelligent damping 8 electrical schematic diagrams.
(5) embodiment
The best way that realizes invention is to utilize integrated circuit technique, and the parts in first integrated circuit 17 and control input 2 and fast precise feedback 7 relatively 4 organically are combined on the chip with output.Make peripheral cell still less, efficient is higher.
Intelligent damping 8 parts have the prospect of extensive use, utilize integrated circuit technique to compress the significant of its volume.
Develop a kind of being more suitable in the fluorescent lamp of DC operation state.
Claims (6)
1. once-through type fluorescent dimmer, comprise input power conversion (1), control input (2), output is (4) relatively, pulse-width modulator (5), energy conversion (6), out-put supply conversion (7), it is characterized in that, the city electrically connects the input of input power conversion (1), the output of input power conversion (1) connects input and compares the detection input of (3) and the power input of energy conversion (6), the output of controlling input (2) connects input and compares (3) and export the relatively reference input of (4), input is first input of the output connection pulse-width modulator (5) of (3) relatively, exports second input that the output that compares (4) connects pulse-width modulator (5); The output of pulse-width modulator (5) connects the control input end of energy conversion (6), the output of energy conversion (6) connects the input of out-put supply conversion (7) and intelligent damping (8), the output of out-put supply conversion (7) connects the input of load and fast precise feedback (9), and the output of fast precise feedback (9) connects the relatively detection input of (4) of output; In above-mentioned parts, the direct voltage that input power conversion (1) is exported after to commercial power rectification, filtering is the main power source of system; Control input (2) is the interface unit of user's control system running status, input relatively (3) is the parts of detection system input power source change situation, output relatively (4) is the parts of detection system out-put supply situation of change, pulse-width modulator (5) is the parts of output control pulse sequence, energy conversion (6) is the parts that the direct current energy of input converted to pulse electric energy output, out-put supply conversion (7) is the parts that pulse electric energy converted to direct current energy, intelligent damping (8) is the parts that parasitic oscillation appears in anti-locking system, and fast precise feedback (9) is the parts that the out-put supply of system is taken a sample; The operation principle of native system is: control and import (2) output energy according to user's expection, corresponding system operation reference voltage is passed to input compare (3) and export relatively (4); No matter how high the voltage of input power conversion (1) output is, input relatively (3) all will be adjusted the operating state of pulse-width modulator (5) according to the difference degree of its sampling value and reference voltage; The output value of out-put supply conversion (7), taken a sample quickly and accurately by fast precise feedback (9), send output relatively (4) to, output relatively (4) is adjusted the operating state of pulse-width modulator (5) according to the difference degree of this sampling and reference voltage; Compare under the common influence of (4) in input comparison (3) and output, the pulse of the appropriate width of pulse-width modulator (5) output, make energy conversion (6) in each energy conversion cycle, can both obtain the energy of user's expection from input power conversion (1), and with new electric energy form output; During pulse-width modulator (5) output pulse, energy conversion (6) beginning energy reserve, intelligent damping (8) is off state; During pulse-width modulator (5) no-output pulse, energy conversion (6) begins the energy storage of releasing, the pulse electric energy that energy conversion (6) is released in out-put supply conversion (7) converts direct current energy to the load work done, when the energy storage of energy conversion (6) all released out, intelligent damping (8) just started damping function.
2. once-through type fluorescent dimmer as claimed in claim 1, wherein input is compared (3) and is comprised inner original current comparator of first integrated circuit (17) and primary voltage error amplifier, it is characterized in that, input is the detection input of (3) relatively---and the tripod of first integrated circuit (17) connects the exciting curent signal output part of energy conversion (6), variable reference Vx connects first terminal of the 3rd resistance (15), second terminal of the 3rd resistance (15) connects first terminal and the input of the 4th resistance (16) and compares reference input---the crus secunda of first integrated circuit (17) of (3), and second terminal of the 4th resistance (16) connects first pin of first integrated circuit (17); In the inside of first integrated circuit (17), the primary voltage error amplifier only amplifies variable reference Vx signal, and the input relatively output of (3) connects with first input of pulse-width modulator (5); The operation principle of these parts is: the anti-phase proportional amplifier that first integrated circuit (17) Central Plains voltage error amplifier and the 3rd resistance (15), the 4th resistance (16) constitute, set the reference voltage terminal of first integrated circuit (17) internal current comparator according to the value of variable reference Vx; When first detected exciting curent signal of integrated circuit (17) tripods during greater than this reference value, input relatively (3) forces pulse-width modulator (5) output low level at once, in the hope of the maximum of restriction exciting curent, realizes the homenergic feed; When first detected exciting curent signal of integrated circuit (17) tripods during less than this reference value, input relatively (3) can not influence the operating state of pulse-width modulator (5).
3. once-through type fluorescent dimmer as claimed in claim 1, wherein output comparison (4) and fast precise feedback (9) is characterised in that, nodal scheme is anodal first terminal that connects the tenth resistance (34) of system's output voltage of Vo, second terminal of the tenth resistance (34) connects first terminal of the 11 resistance (35) and the 5th pin of second integrated circuit (36), second terminal ground connection of the 11 resistance (35), nodal scheme is first terminal that system's output voltage negative pole of Ec connects the 8th resistance (31), second terminal of the 8th resistance (31) connects first terminal of the 9th resistance (32) and the 6th pin of second integrated circuit (36), second terminal of the 9th resistance (32) connects the anode of first diode (33), the minus earth of first diode (33), fixed reference Vr connects the octal of second integrated circuit (36) and first terminal of the 12 resistance (37), second terminal of the 12 resistance (37) connects the 7th pin of second integrated circuit (36) and the anode of second diode (38), the 4th pin ground connection of second integrated circuit (36), output is the output of (4) relatively---and the negative electrode of second diode (38) connects second input of pulse-width modulator (5).In this link, fixed reference Vr makes the control information of second integrated circuit (36) output stable, reliable, and first diode (33) provides protection point corresponding reference level, and second diode (38) is protection switch; The operation principle of this link is: when the ratio of the voltage (Vo-Ec) at load two ends and first diode (33) anode voltage during less than the ratio of the 8th resistance (31) and the 9th resistance (32), second integrated circuit (36) output low level, second diode this moment (38) turn-offs, and the operating state of pulse-width modulator (5) and output relatively (4) are irrelevant; Voltage when the load two ends transfinites; be that the ratio of itself and first diode (33) anode voltage is during greater than the ratio of the 8th resistance (31) and the 9th resistance (32); second integrated circuit (36) output high level; second diode (38) conducting this moment; pulse-width modulator (5) is output low level at once, and system enters guard mode.
4. once-through type fluorescent dimmer as claimed in claim 1, wherein energy conversion (6) comprises switch transformer (44), first field effect transistor (42), the 3rd diode (45), the 14 resistance (43), it is characterized in that, the anodal Ec of input power conversion (1) output dc voltage connects first terminal of the 13 resistance (41), second terminal of the magnetic energy signal output part of energy conversion (6)---the 13 resistance (41) connects first terminal of the former limit of switch transformer (44) winding, second terminal of the former limit of switch transformer (44) winding connects the accessory power supply input of intelligent damping (8), nodal scheme is first energy output of the energy conversion (6) of D---the 3rd terminal of the former limit of switch transformer (44) winding connects drain electrode and first energy input of out-put supply conversion (7) and first damping input of intelligent damping (8) of first field effect transistor (42), the source electrode of the exciting curent signal output part of energy conversion (6)---first field effect transistor (42) connects first terminal of the 14 resistance (43), second terminal ground connection of the 14 resistance (43), the grid of the control input end of energy conversion (6)---first field effect transistor (42) connects the output of pulse-width modulator (5), first terminal of switch transformer (44) secondary winding connects the anode of the 3rd diode (45), the negative electrode of the 3rd diode (45) connects the first accessory power supply VCC, second terminal ground connection of switch transformer (44) secondary winding; In these parts, node Ec is the common port of the energy input and output of energy conversion (6); The voltage at the 13 resistance (41) two ends is used for describing the present situation of magnetic energy in the switch transformer (44); First and second two terminals of the former limit of switch transformer (44) winding provide the energy for the control circuit in the intelligent damping (8); The electronic switch of first field effect transistor (42) for magnetizing to switch transformer (44); Switch transformer (44) secondary winding network is given the first accessory power supply VCC makeup energy, guarantees with first integrated circuit (17) to be that the control core circuit can stably be worked; The operation principle of these parts is: during pulse-width modulator (5) output high level, first field effect transistor (42) saturation conduction, source current is set out by Ec and returns the negative pole of power supply by former limit winding, first field effect transistor (42) and the 14 resistance (43) of the 13 resistance (41) and switch transformer (44), the magnetic energy that switch transformer (44) stores increases along with the linearity of exciting curent and increases sharply, and the exciting curent signal of the magnetic energy signal of the 13 resistance (41) output and the 14 resistance (43) output is also increasing; During pulse-width modulator (5) output low level, first field effect transistor (42) ended, the magnetic energy that is stored in switch transformer (44) is released to out-put supply conversion (7) from output node D with the form of pulse current, along with reducing gradually of switch transformer (44) former limit winding current, the magnetic energy signal of the 13 resistance (41) output is also more and more littler, when the electric current of the former limit of switch transformer (44) winding reduces to zero, show that the magnetic energy of storage in the switch transformer (44) has all released out.
5. once-through type fluorescent dimmer as claimed in claim 1, wherein out-put supply conversion (7) is characterised in that, first energy output D of energy conversion (6) connects the anode of the 4th diode (51), nodal scheme is the positive pole of out-put supply conversion (7) output dc voltage of Vo---the negative electrode of the 4th diode (51) connects first terminal of the 3rd electric capacity (52) and a terminal of fluorescent lamp (53) one ends, and second terminal of the negative pole of out-put supply conversion (7) output dc voltage---the 3rd electric capacity (52) connects the terminal of fluorescent lamp (53) other end and the energy input and output common port Ec of energy conversion (6); In these parts, node Ec is the common port of the energy input and output of out-put supply conversion (7); The operation principle of these parts is: when fluorescent lamp (53) is not luminous, the magnetic energy that energy conversion (6) is released only becomes electric energy and is stored in the 3rd electric capacity (52), make the direct voltage at the 3rd electric capacity (52) two ends rise rapidly, when the direct voltage at the 3rd electric capacity (52) two ends reaches the puncture voltage of mercury vapour in the fluorescent lamp (53), the avalanche type discharging current of its generation is drop-down rapidly the direct voltage at the 3rd electric capacity (52) two ends, and meanwhile fluorescent lamp (53) also begins luminous; After fluorescent lamp (53) is luminous, if energy conversion (6) let out can during replenish for the 3rd electric capacity (52) electric energy equal energy conversion (6) at the 3rd electric capacity (52) during the energy storage during to electric energy that fluorescent lamp (53) discharges, the ripple voltage at the 3rd electric capacity (52) two ends no longer changes, and fluorescent lamp (53) just sends stable luminous flux.
6. once-through type fluorescent dimmer as claimed in claim 1, wherein intelligent damping (8) comprises the 7th diode (69), the 18 resistance (70), it is characterized in that, the energy source terminal that energy conversion (6) provides for second accessory power supply connects first terminal of the 15 resistance (61), second terminal of the 15 resistance (61) connects the anode of the 5th diode (63), the negative electrode of the positive pole of second accessory power supply---the 5th diode (63) connects the negative electrode of the positive pole of the 4th electrochemical capacitor (65) and voltage-stabiliser tube (64) with first terminal of the 17 resistance (66) and the octal of the 3rd integrated circuit (68), the negative pole of the negative pole of second accessory power supply---the 4th electrochemical capacitor (65) connects anode and first pin of the 3rd integrated circuit (68) and the common port Ec of energy conversion (6) of voltage-stabiliser tube (64), the magnetic energy signal output part of energy conversion (6) connects first terminal of the 16 resistance (62), second terminal of the 16 resistance (62) connects the base stage of second terminal and second triode (67) of the 17 resistance (66), the emitter of second triode (67) connects the 4th pin of the 3rd integrated circuit (68), and the collector electrode of second triode (67) connects the crus secunda of the 3rd integrated circuit (68), the common port Ec of the source electrode of the 6th pin and the 3rd field effect transistor (71) and energy conversion (6); The tripod of the 3rd integrated circuit (68) connects the grid of the 3rd field effect transistor (71), the 3rd field effect transistor (71) drain electrode connects second terminal of the 18 resistance (70), first terminal of the 18 resistance (70) connects the negative electrode of the 7th diode (69), and the anode of the 7th diode (69) connects first energy output D of energy conversion (6); In these parts, node Ec also is the common port of intelligent damping (8); The 15 resistance (61) plays metering function, second accessory power supply that voltage-stabiliser tube (64) participates in also provides normative reference for detecting the magnetic energy signal exactly, and second triode (67) and the 3rd integrated circuit (68) constitute the strong same phase comparator of high sensitivity of driving force; The 3rd field effect transistor (71) served as damper switch, and the 18 resistance (70) plays damping action, and the 7th diode (69) can prevent that the 3rd field effect transistor (71) from damaging because of conducting unusually during the energy storage of energy conversion (6); The operation principle of these parts is: the magnetic energy signal of energy conversion (6) output, by the base stage of giving second triode (67) after the 16 resistance (62), the 17 resistance (66) translation, the decay; Energy conversion (6) is during energy storage, the 7th diode (69) is applied in reverse voltage and ends, meanwhile the magnetic energy signal along with energy conversion (6) output strengthens gradually, the base potential of second triode (67) descends gradually, when second triode (67) produces base current, the 3rd integrated circuit (68) output low level, the 3rd field effect transistor (71) ended, and the 18 resistance (70) is off state; When energy conversion (6) begins to let out energy, though the 7th diode (69) is applied in forward voltage, but powerful magnetic energy signal makes second triode (67) still keep conducting, the 3rd field effect transistor (71) still is in cut-off state, so electric current can not occur in the 18 resistance (70), when being reduced to zero gradually along with the magnetic energy signal, the base potential of second triode (67) rises gradually and base current is reduced to zero gradually, the 3rd integrated circuit (68) output high level when second triode (67) ends, the 3rd field effect transistor (71) conducting, the 18 resistance (70) begins to consume the reverse current that the 4th diode (51) occurs in the out-put supply conversion (7) in reverse recovery time---prevent that this current feedback is to energy conversion (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100596656A CN100486401C (en) | 2004-06-16 | 2004-06-16 | DC type fluorescent lamp light-regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100596656A CN100486401C (en) | 2004-06-16 | 2004-06-16 | DC type fluorescent lamp light-regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1711006A CN1711006A (en) | 2005-12-21 |
| CN100486401C true CN100486401C (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100596656A Expired - Fee Related CN100486401C (en) | 2004-06-16 | 2004-06-16 | DC type fluorescent lamp light-regulator |
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| Country | Link |
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| CN (1) | CN100486401C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5333768B2 (en) * | 2009-09-04 | 2013-11-06 | 東芝ライテック株式会社 | LED lighting device and lighting device |
| JP5333769B2 (en) * | 2009-09-04 | 2013-11-06 | 東芝ライテック株式会社 | LED lighting device and lighting device |
| JP5870291B2 (en) * | 2011-11-22 | 2016-02-24 | パナソニックＩｐマネジメント株式会社 | Dimmer |
| TWI800183B (en) * | 2021-12-28 | 2023-04-21 | 咸瑞科技股份有限公司 | Dynamic compensation load device |
| JP7359499B1 (en) | 2023-03-17 | 2023-10-11 | 咸瑞科技股▲分▼有限公司 | dynamic load compensator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3875460A (en) * | 1974-06-10 | 1975-04-01 | Westinghouse Electric Corp | Synthesis of dimmer output waveform within the dimmer logic circuit |
| US4414493A (en) * | 1981-10-06 | 1983-11-08 | Thomas Industries Inc. | Light dimmer for solid state ballast |
-
2004
- 2004-06-16 CN CNB2004100596656A patent/CN100486401C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3875460A (en) * | 1974-06-10 | 1975-04-01 | Westinghouse Electric Corp | Synthesis of dimmer output waveform within the dimmer logic circuit |
| US4414493A (en) * | 1981-10-06 | 1983-11-08 | Thomas Industries Inc. | Light dimmer for solid state ballast |
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| CN1711006A (en) | 2005-12-21 |
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