CN101868106A - Electronic ballast for fluorescent lamp and energy-saving lamp - Google Patents
Electronic ballast for fluorescent lamp and energy-saving lamp Download PDFInfo
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- CN101868106A CN101868106A CN200910134551A CN200910134551A CN101868106A CN 101868106 A CN101868106 A CN 101868106A CN 200910134551 A CN200910134551 A CN 200910134551A CN 200910134551 A CN200910134551 A CN 200910134551A CN 101868106 A CN101868106 A CN 101868106A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
- H05B41/2828—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage using control circuits for the switching elements
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
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Abstract
The invention relates to 'an electronic ballast for a fluorescent lamp and an energy-saving lamp'. A multifunctional module circuit is arranged on the basis of a half-bridge inverter circuit-based electronic ballast. The module circuit has the functions of preventing common conduction, preheating start-up, and protecting overcurrent and short-circuit, and is connected between a positive power node A and a negative power node B of a rectifier filtering circuit and upper and lower bridges of two power tubes of a bridge inverter. Although the cost is increased, the electronic ballast can become an electronic ballast of a new-generation half-bridge inverter circuit, which has the advantages of long service life, relatively low cost, sufficient output power and the functions of electronic preheating and overcurrent, short-circuit and open-circuit protection. The electronic ballast for the fluorescent lamp and the energy-saving lamp has higher cost performance and stronger market competitiveness, is favorable for popularization of split type energy-saving lamps, is favorable for ending the embarrassing situation that the conventional fluorescent lamp and energy-saving lamp do not save money, and is more favorable for reducing the emission of carbon dioxide and mercury pollution on the environment.
Description
The invention belongs to electronic technology field, further relate to " a kind of fluorescent lamp and energy-saving lamp electronic ballast ".
In existing technology: selling on market at present and " fluorescent lamp and energy-saving lamp electronic ballast " (annotating: be designated hereinafter simply as " electric ballast ") that the consumer generally uses, substantially all is the circuit structure that adopts " magnetic satisfy self-excited half-bridge formula inverter " (notes: be designated hereinafter simply as " semi-bridge type inverter ").Because simple in structure, use that element is less, price is lower, is subjected to consumers in general's welcome especially.But: this electric ballast is because poor anti jamming capability, and all do not have preheating, overcurrent and short-circuit protection function, so the annual spoilage that all has more than 10～20%.Again because of there not being preheat function, make by the useful life of its bright " fluorescent tube and power saving fluorescent lamps " of point (annotating: be designated hereinafter simply as " fluorescent tube ") and seriously shorten, especially ambient temperature be lower than+below 10 ℃ the time, it is more obvious that shorten the useful life of fluorescent tube.Power output with ballast is reduced to 70～80% of the rated power of being lighted fluorescent tube so manufacturer has to, when reduce starting to the impact of the filament of fluorescent tube, come the useful life of prolonging lamp tube, the result causes and uses the brightness of the fluorescent tube that this ballast lights obviously to feel not enough.But still can not avoid annual a large amount of electronic wastes and the discarded fluorescent tube of producing, what especially can not ignore is that heavy metal Hg in a large amount of discarded fluorescent tubes is to the pollution of environment with to descendants's harm.And have the electric ballast that starts preheating, open circuit, overcurrent and short-circuit protection function now, all be to adopt special-purpose integrated circuit and fet power pipe to form.So, do not accepted by consumers in general because the higher price of cost is relatively costly.
In order to overcome above-mentioned deficiency: the invention provides on a kind of basis based on the semi-bridge type inverter circuit, install a multifunction module additional: this module has " prevent the lower power tube conducting simultaneously of unexpected moment of semi-bridge type inverter and burn " (annotating: be designated hereinafter simply as " anti-lead altogether "), starts preheating, overcurrent and short-circuit protection function.Though increased a little cost, can make this electric ballast have that reliability is high, cost is relatively low, power output is sufficient and have an electric ballast of new generation of kinds of protect function.The fluorescent tube relative brightness of using this electric ballast to light obviously increases, and makes prolong 3～5 times relatively with first-class advantage the useful life of fluorescent tube.
For achieving the above object, technical scheme of the present invention: comprise triode, controllable silicon, diode, resistor, capacitor, electrolytic capacitor, transformer and inductor composition.It is characterized in that: current rectifying and wave filtering circuit, open-circuit-protection and circuits for triggering, semi-bridge type inverter circuit, series resonance output circuit and multifunction module circuit are formed.Wherein " multifunction module circuit " (annotating: be designated hereinafter simply as " module ") is connected positive supply node A, the negative supply node B of current rectifying and wave filtering circuit and up and down between the bridge circuit of two power tubes of bridge-type inverter.
Integrated circuit structure annexation of the present invention is as shown in Figure 1:
Described current rectifying and wave filtering circuit: comprise that diode D1～D4 and electrolytic capacitor C1 form.Described diode D1～D4 forms bridge rectifier, wherein the negative pole of diode D1 is connected with diode D2 positive pole, and be connected with the input X of AC power, the negative pole of described diode D3 is connected with the positive pole of diode D4, and is connected with another input O of AC power.The node A that the positive pole of described diode D1, D3 is connected with electrolytic capacitor C1 positive pole is a positive electricity.The node B that the negative pole of described diode D2, D4 is connected with electrolytic capacitor C1 negative pole is a negative electricity.
Described open-circuit-protection and circuits for triggering: comprise that resistor R 1～R2, diode D5, capacitor C2 and diac DR form: the end of an end of described resistor R 1, an end of resistor R 2 and capacitor C5 is connected with an end of the filament of an end of fluorescent tube.The other end of resistor R 1 is connected with the negative pole of diode D5, the end of diac DR and the end of capacitor C2.The head end of the elementary winding a of the negative pole of the positive pole of the other end of described resistor R 2 and diode D5, an end of resistor R 3, module MK pin 2, diode D6, the end of capacitor C4, magnetic saturation transformer T and the tail end of the secondary winding b of magnetic saturation transformer T are connected, and (annotate: magnetic saturation transformer T is elementary, the direction of secondary winding in order to distinguish in the accompanying drawing 1, regulation band point end is the winding head end as usual, and the other end is the winding tail end).The other end of described diac DR is connected with an end of base stage, diode D7 positive pole and the resistor R 6 of triode BG2.One end of the other end resistance R 7 of described capacitor C2, the negative pole of electrolytic capacitor C3, module MK pin 7 are connected with node B negative electricity in the current rectifying and wave filtering circuit.
Described semi-bridge type inverter circuit: comprise that triode BG1～BG2, diode D6～D7, resistor R 3～R6 and magnetic saturation transformer T form.The other end of the other end of the collector electrode of described triode BG1 and capacitor C4, the filament of fluorescent tube DG one end is connected with the node A positive electricity in the described current rectifying and wave filtering circuit, the base stage of triode BG1 is connected with module MK pin 3 with the positive pole of diode D6, an end of resistor R 4, and the emitter of triode BG1 is connected with the other end of resistor R 3.The head end of the elementary winding a of the negative pole of the other end of one end of described resistor R 3 and the positive pole of diode D5, resistor R 2, module MK pin 2, diode D6, the end of capacitor C4, magnetic saturation transformer T and the tail end of the secondary winding b of magnetic saturation transformer T are connected.The other end of described resistor R 4 is connected with the head end of the secondary winding b of magnetic saturation transformer T.The collector electrode of described triode BG2 is connected with module MK pin 5, and the base stage of triode BG2 is connected with the diac DR other end with the positive pole of diode D7, an end of resistor R 6.The emitter of triode BG2 is connected with an end of resistor R 5, and positive pole, module MK pin 6 and the head end of the secondary winding c of magnetic saturation transformer T of the negative pole of the other end of resistor R 5 and diode D7, resistor R 7, electrolytic capacitor C3 are connected.The other end of described resistor R 6 is connected with the tail end of the secondary winding c of magnetic saturation transformer T.
Described series resonance output circuit: the filament that comprises inductor L, capacitor C5～C6 and external fluorescent tube DG two ends is formed.The end of described inductor L is connected with the tail end of the elementary winding a of magnetic saturation transformer T, the other end of inductor L is connected with the end of capacitor C6, the other end of capacitor C6 is connected with an end of the filament of the other end of external circuit fluorescent tube DG, the other end of the filament of the fluorescent tube DG other end is connected with the end of capacitor C5, the other end of capacitor C5 is connected with the other end of the filament of fluorescent tube DG one end, and the other end of the filament of described fluorescent tube DG one end is connected with node A positive electricity in the described current rectifying and wave filtering circuit.
Described multifunction module circuit MK: comprise anti-conduct electricity altogether the road, start preheat circuit and overcurrent, short-circuit protection circuit are formed, the outside is established 1～7 totally 7 pins altogether.The other end of the filament of the other end of the node A positive electricity in the pin 1 of described module MK and the described current rectifying and wave filtering circuit, the collector electrode of triode BG1, capacitor C4, the end of fluorescent tube DG is connected.The head end of the elementary winding a of the negative pole of the other end of the pin 2 of described module MK and the positive pole of diode D5, resistor R 2, the other end of resistor R 3, diode D6, the other end of capacitor C4, magnetic saturation transformer and the tail end of the secondary b of magnetic saturation transformer are connected.The pin 3 of described module MK is connected with the base stage of the triode BG1 of bridge-type inverter circuit, the positive pole of diode D6, an end of resistor R 4.The other end of the resistor R 4 in the pin 4 of described module MK and the bridge-type inverter circuit and the head end of the secondary winding b of magnetic saturation transformer T are connected.The collector electrode of triode BG2 in the pin 5 of described module MK and the semi-bridge type inverter circuit is connected.The pin 6 of described module MK is connected with the other end of the positive pole of electrolytic capacitor C3, resistor R 7, the other end of resistor R 5, the positive pole of diode D7 and the head end of the secondary winding c of magnetic saturation transformer T.The pin 7 of described module MK and the negative pole of an end of resistor R 7, electrolytic capacitor C3 are connected with node B negative electricity in the current rectifying and wave filtering circuit.
Described multifunction module MK internal circuit is as shown in Figure 2: comprise that transistor, controllable silicon, diode, resistor, capacitor and electrolytic capacitor form.The concrete function of described multifunction module MK is made up of anti-road, startup preheat circuit and overcurrent, the short-circuit protection circuit of conducting electricity altogether.
Described anti-route triode BG3～BG4, diode D8～D9, resistor R 8～R11, the capacitor C7 composition of conducting electricity altogether.The emitter of described triode BG3 is connected with this module MK pin 3 with an end of resistor R 10, and (annotate: triode BG3 is the positive-negative-positive transistor, all the other are negative-positive-negative transistor), the base stage of triode BG3 is connected with the other end of resistor R 10, an end of resistor R 11 and the end of capacitor C7, and the collector electrode of triode BG3 is connected with this module MK pin 2 with an end of resistor R 8, the negative pole of diode D8, the positive pole of diode D12, the end of capacitor C10.The collector electrode of described triode BG4 is connected with the other end of the capacitor C7 other end and resistor R 11.The end of the other end of the base stage of triode BG4 and resistor R 8 and the R9 of resistor is connected.The emitter of triode BG4 is connected with this module pin 5 with the other end of resistor R 9, the positive pole of diode D9, the negative pole of diode D11, the positive pole of diode D10, an end of resistor R 12.The positive pole of described diode D8 is connected with the negative pole of diode D9.
Described startup preheat circuit: form by triode BG5, diode D10, resistor R 12～R14, electrolytic capacitor C8, capacitor C9～C10 and described anti-resistor R 10～R11, capacitor C7 and the triode BG3 that conducts electricity altogether in the road.The positive pole of described electrolytic capacitor C8 is connected with this module pin 4, the negative pole of electrolytic capacitor C8 is connected with an end of resistor R 14, and the other end of described resistor R 14 is connected with the base stage of triode BG5, an end of resistor R 13 and the end of capacitor C9.The emitter of described triode BG5 is connected with the negative pole of diode D10, the other end of resistor R 12, the other end of resistor R 13, the other end of capacitor C9 and the other end of capacitor C10.
Described overcurrent, short-circuit protection circuit: form jointly by controllable silicon QT, diode D11, resistor R 15～R16, electrolytic capacitor C11, light-emitting diode DL and the described anti-road of conducting electricity altogether.One end of described resistor R 16 is connected with this module pin 6, the other end of resistor R 16 is connected with the positive pole of electrolytic capacitor C11 and the trigger electrode of controllable silicon QT, and the negative pole of described electrolytic capacitor C11 is connected with this module pin 7 with the negative electrode of controllable silicon QT, the negative pole of diode D12.The anode of described controllable silicon QT is connected with the positive pole of diode D11 and the positive pole of light-emitting diode DL, and the negative pole of light-emitting diode DL is connected with an end of resistor R 15, and the other end of the R15 of resistor is connected with this module pin 1.
The present invention has following advantage:
The present invention is on the basis of the electric ballast of original semi-bridge type inverter circuit structure, has increased a multifunction module, makes this ballast have anti-lead altogether, start preheating, open circuit, overcurrent and short-circuit protection function.Though increased the inherent defect that a little cost has really changed the primary electron ballast significantly.Make this electric ballast have the electronics preheating, anti-do that ability is disturbed by force, driving power is sufficient and advantage (even also can not make the damage of this electric ballast to the output short circuit) such as the utmost point is not fragile, and the lighting tube brightness of the same power that the fluorescent tube lighted lights than primary electron ballast is obviously increased, the life-span of fluorescent tube is brought up to more than 3～5 times relatively.Electric ballast of the present invention has the high cost performance and the stronger market competitiveness, also have good social benefit and environmental benefit, also help the production of " separated energy-saving lamp " and popularize, more help reducing the pollution of the discharging of carbon dioxide and mercury environment.
Description of drawings:
Accompanying drawing 1 is an integrated circuit schematic diagram of the present invention.
Do simple declaration below in conjunction with 1 pair of structure of the present invention of accompanying drawing and operation principle:
As shown in Figure 1: the present invention is that " a kind of fluorescent lamp and energy-saving lamp electronic ballast " mainly is made up of current rectifying and wave filtering circuit, open-circuit-protection and circuits for triggering, semi-bridge type inverter circuit, series resonance output circuit and multifunction module circuit.Described current rectifying and wave filtering circuit, open-circuit-protection and circuits for triggering, the contrary formula change device circuit of half-bridge and serial-resonant output circuit are prior art, and its operation principle is not being given unnecessary details.
Below in conjunction with the portions of electronics element in accompanying drawing 2 and the accompanying drawing 1, the structure and the principle of the present invention's's " a kind of fluorescent lamp and energy-saving lamp electronic ballast " multifunction module part is described in further detail.
Described multifunction module MK: form by anti-road, startup preheat circuit and overcurrent, the short-circuit protection circuit of conducting electricity altogether.
Described anti-route triode BG3～BG4, diode D8～D9, resistor R 8～R11 and the capacitor C7 of conducting electricity altogether forms.Described when the semi-bridge type inverter circuit working the output of positive half cycle the time, triode BG1 conducting, triode BG2 end.At this moment there is not electric current to flow to module pin 5 through diode D8, D9 and resistor R 8, R9, so the voltage between module pin 2 and the module pin 5 is 0 volt by module pin 2.Node voltage and the voltage between the module pin 5 that resistor R 8, R9 series connection back are connected with the base stage of triode BG4 also are 0 volt.At this moment triode BG4 ends, because the base voltage of triode BG3 equals the voltage of this module pin 3 under the effect of resistor R 10, emitter owing to triode BG3 also is connected with this module pin 3 again, so voltage equals 0 volt between the emitter of triode BG3 and the base stage.Triode BG3 is ended, so triode BG3 has no effect to semi-bridge type inverter circuit working operating state to triode BG1 when positive half cycle is exported.When the semi-bridge type inverter circuit working when negative half period is exported, triode BG1 is by, triode BG2 conducting.At this moment electric current flows to this module 5 pin through diode D8, D9 and resistor R 8, R9 respectively through this module pin 2, because diode D8, D9 are the forward series connection, again because diode D8, D9 select for use is the ordinary silicon rectifying tube of 0.6 volt of forward junction pressure drop, so the voltage between pin 2 and the pin 5 is stabilized in about 1.2 volts.Module pin 2 is that positive voltage, module pin 5 are negative voltage relatively relatively.Again owing to resistor R 8, R9 connect, suitably select the resistance of resistor R 8, R9, node voltage and 0.6 volt of the voltage ratio between the module pin 5 that resistor R 8, R9 series connection back are connected with the base stage of triode BG4 are higher slightly, make triode BG4 conducting.Its collector voltage approximates the voltage of module pin 5 after the triode BG4 conducting, be added on the base stage of triode BG3 by current-limiting resistor R11 and speed-up condenser C7, this voltage belongs to forward voltage with respect to the base stage of positive-negative-positive triode BG3, makes triode BG3 conducting.So the emitter of triode BG3 is module pin 3 and collector electrode is that voltage between the module pin 2 approximates 0 volt, be connected with the other end of the emitter resistance R3 of semi-bridge type inverter circuit triode BG1 owing to module pin 2 again, module pin 3 is connected with the base stage of semi-bridge type inverter triode BG1, if at this moment noisy positive current is added on the base stage of semi-bridge type inverter triode BG1, will be by the emitter of the triode BG3 in the module and the short circuit of collector electrode institute.So when the triode BG2 of semi-bridge type inverter conducting, semi-bridge type inverter triode BG1 is forced at cut-off state by the anti-road of conducting electricity altogether.Triode BG1, the BG2 that is to say semi-bridge type inverter can not produce moment conducting simultaneously and damage under anti-effect of conducting electricity the road altogether under any operating state.
Described startup preheat circuit: form by triode BG5, resistor R 12～R14, electrolytic capacitor C8, capacitor C9～C10 and described anti-triode BG3, resistor R 10～R11, the capacitor C7 that conducts electricity altogether in the road.Electrolytic capacitor C8, capacitor C10 both end voltage all equal 0 volt before bridge-type inverter starts.After bridge-type inverter starts, at first enter the negative half period output state, triode BG1 ends, triode BG2 conducting, electric current divides through diode D8 → D9 flow to pin 5 at three the tunnel: the one tunnel by the positive electricity of the node A in the described current rectifying and wave filtering circuit after module pin 2 enters multifunction module through the filament → capacitor C6 → inductor L → magnetic saturation primary winding a of the other end of filament " flow direction " (annotate: following usefulness " → " is represented) capacitor C5 → fluorescent tube DG of the end of fluorescent tube DG, another road flows to pin 5 through resistance R 8 → R9, also have one the tunnel to flow to module pin 5, again the node B negative electricity in triode BG2 → resistance R 5 → resistance R 7 → current rectifying and wave filtering circuit through capacitor C10 → diode D10.In this process, charge to capacitor C5 with to capacitor C10 respectively simultaneously.Capacitor C10 connection module pin 2 ends are for just, and capacitor C10 connects diode D10 positive terminal for negative.At this moment because the voltage of the head end induction of the magnetic saturation transformer T secondary winding b that module pin 4 connects is negative voltage, module pin 2 is a positive voltage with the voltage of the tail end induction of magnetic saturation transformer T secondary winding b, be reverse voltage with respect to diode D10 and triode BG5 emitter junction, so electric current can not be through emitter junction → electrolytic capacitor C8 and 4 couples of electrolytic capacitor C8 reverse charging of module pin or the discharge of module pin 2 → resistor R 8 → resistor R 9 → diode D10 → triode BG5.Because the operating frequency of bridge-type inverter is higher relatively, it is relatively large that the resistance of resistance R 12, R13 is selected for use, little to the reverse charge and discharge process influence of capacitor C10, can ignore.When semi-bridge type inverter negative half period end of output entered the output of positive half cycle: triode BG2 ended, triode BG1 conducting immediately under the effect that starts preheat circuit, series resonance capacitor C5 has begun discharge, its positive current through other end filament → capacitor C4 of one end → fluorescent tube DG of series resonance capacitor C5 (annotate: because capacitor C4 capacity is less, some electric current through the full elementary winding of transformer T of electrolytic capacitor C1 → module pin 7 → diode D12 → module pin 2 → magnetic a) → other end of the elementary winding a of magnetic saturation transformer T → series resonance inductor L → capacitor C6 → fluorescent tube DG one end filament → series resonance capacitor C5.At this moment the tail end of the secondary winding c of magnetic saturation transformer T is sensed as negative voltage, and this negative voltage is added on the base stage of triode BG2 through resistance R 6, makes triode BG2 remain off.The tail end of the secondary winding b of magnetic saturation transformer T is sensed as negative electricity, and its head end is sensed as positive voltage.This positive voltage is added in through resistance R 4 on the base stage of triode BG1, and the pin 4 → electrolytic capacitor C8 → resistor R 14 through multifunction module is added in triode BG5 base stage simultaneously, makes triode BG5 conducting.To electrolytic capacitor C8 charging, because the capacity that electrolytic capacitor C8 selects for use is big and the metering function of resistance R 14, each positive half cycle can only charge into a little electric weight simultaneously.Again owing to capacitor C10 has charged when the previous negative half period of semi-bridge type inverter is exported.The positive terminal that capacitor C10 meets diode D10 fills and is negative electricity, and it is superimposed that the tail end of the secondary winding b of this voltage of capacitor C10 and magnetic saturation transformer T is sensed as negative electricity.Base stage for positive-negative-positive triode BG3 is forward current, and this negative voltage is added on the base stage of triode BG3 through resistance R 11 and capacitor C7 when triode BG5 conducting, makes triode BG3 conducting.Triode BG3 conducting makes that voltage approaches 0 volt between module pin 2 and the module pin 3, and the base stage and the voltage between emitter that are equivalent to triode BG1 equal 0 volt, forces triode BG1 at initial stage of the positive half cycle of semi-bridge type inverter remain off state still.When capacitor C10 discharge off, the base stage of positive-negative-positive triode BG3 loses negative voltage and ends, the positive voltage of the head end of the secondary winding b of magnetic saturation transformer T induction at this moment, could be added in triode BG1 base stage normally through resistance R 4, make the conducting relative delay (suitably select the capacity of capacitor C10, can change time of turn on delay in the output of the positive half cycle of bridge-type inverter of triode BG1) of triode BG1.Because triode BG1 shortened relatively in the time of positive half cycle conducting, and whole bridge-type inverter power output is reduced relatively, suitably selected starting power not only not have percussion can also play pre-heat effect on the contrary to the filament of fluorescent tube.All capacitor C10 is charged when each negative half period of bridge-type inverter is exported when this electric ballast starts, when exporting, each positive half cycle put in the appropriate time, electrolytic capacitor C8 charges when each positive half cycle, when negative half period, do not discharge, when electrolytic capacitor C8 fill voltage when equaling the positive voltage of head end induction of secondary winding b of magnetic saturation transformer T, electrolytic capacitor C8 just can not produce charging current again, make triode BG5 and no longer conducting of triode BG3, at this moment this electric ballast startup warm finishes, and bridge-type inverter enters normal output services state.Capacitor C7 plays acceleration in circuit, capacitor C9 plays high frequency voltage bypass effect in circuit.When illumination finishes to close AC power, the positive voltage that positive pole filled of electrolytic capacitor C8, can bleed off through secondary winding b → module pin 2 → resistor R 8, R9 → resistor R 12 → resistor R 13 → resistor R 14 the negative poles of magnetic saturation transformer T to electrolytic capacitor C8, whole discharge time in about tens seconds, if during this period of time light fluorescent tube again, can not give full play to the effect that it all starts warm though start preheat circuit, but because fluorescent tube and filament temperature also do not have cooling fully, so to there is no big influence in useful life of fluorescent tube.
Described overcurrent, short-circuit protection circuit: form by controllable silicon QT, diode D11, resistor R 15～R16, electrolytic capacitor C11 and light-emitting diode DL.When bridge-type inverter is operated in normal condition, can produce a direct voltage at resistance R 7 two ends, this direct voltage, is added in silicon controlled control again and extremely goes up after the 2nd pin of module MK through electrolytic capacitor C3 filtering after resistor R 16 and electrolytic capacitor C10 filtering.Suitably select the resistance of resistor R 7, make the magnitude of voltage of its generation suitably be lower than the trigger voltage that controllable silicon QT controls the utmost point, make controllable silicon be in cut-off state.Because an end of resistor R 15 is connected with node A positive electricity in the current rectifying and wave filtering circuit through module pin 1, resistor R 15 other ends are connected with light-emitting diode DL negative pole, the positive pole of light-emitting diode is connected with the positive pole of silicon controlled anode with diode D11, makes the voltage of diode D11 positive pole approximate node A positive voltage in the current rectifying and wave filtering circuit.Because the negative pole of diode D11 is the positive voltage that is less than or equal to node A always, so also remain off state always of diode D11.Because controllable silicon QT and diode D11 are in cut-off state, light-emitting diode DL no current by and not luminous.When the bearing power of series resonance output circuit obviously increases or during short circuit, the dc voltage drop of resistance R 7 can raise simultaneously, when the voltage at resistance R 7 two ends is higher than the trigger voltage of the controllable silicon QT control utmost point, can make controllable silicon QT conducting through resistance R 16.Its anode voltage approximates 0 volt with respect to the node B voltage in module pin 7 and the current rectifying and wave filtering circuit after controllable silicon QT conducting, makes diode D11 forward conduction, makes the voltage of pin 5 and the voltage of pin 7 also approach 0 volt.By anti-effect of conducting electricity the road altogether noted earlier, the triode BG1 of bridge-type inverter ends at once, makes whole bridge-type inverter work stop to have played protective effect fully.After bridge-type inverter stopped output, resistance R 3 two ends did not have electric current to approximate 0 volt by voltage drop, and the electric current owing to flow through by resistor R 1, R2 diode D11 and controllable silicon QT is very little again, might make controllable silicon QT withdraw from conducting state.In order to prevent controllable silicon QT from withdrawing from conducting state bridge-type inverter is started once more and damage; by the positive electricity of current rectifying and wave filtering circuit node A through resistance R 15 and light-emitting diode DL; for controllable silicon QT provides one to keep electric current; make controllable silicon QT keep stable conducting state; light-emitting diode DL is luminous simultaneously, and this electric ballast of prompting consumer has entered guard mode.If under guard mode behind the deenergization; when the stored electric weight of the electrolytic capacitor C1 in the current rectifying and wave filtering circuit reduces gradually; the electric current of keeping of controllable silicon QT is also reducing gradually; when controllable silicon QT keep electric current less than certain value the time will withdraw from conducting state and end, make this module overcurrent, short-circuit protection circuit return to the electric ballast normal operating conditions.Above overall process can effectively be protected this electric ballast to have under overcurrent and the short-circuit conditions at output and can not be damaged.
Bridge-type inverter of the present invention can be auto-excitation type half-bridge or full-bridge inverter, or independent-excited half-bridge or full-bridge inverter
The power tube of bridge-type inverter of the present invention can be bipolar transistor, field-effect transistor (MOSFET) and igbt (IGBT) etc.
The local circuit of multifunction module circuit of the present invention or whole circuit can be used on electronic switch transformer, electronic welding machine, ultrasonic wave driving power, inverter power supply, electromagnetic oven and have on the electronic product of bridge-type inverter output circuit.
Multifunction module circuit of the present invention can be separate upright element circuitry, also can be integrated circuit, also can be thick film circuit.
Claims (5)
1. fluorescent lamp and energy-saving lamp electronic ballast: a kind of electric ballast based on " bridge-type inverter " circuit structure comprises that triode, controllable silicon, diode, resistor, capacitor, electrolytic capacitor, transformer and inductor etc. form.It is characterized in that: by anti-conduct electricity altogether the road, start the multifunction module circuit MK that preheat circuit, overcurrent and short-circuit protection circuit are formed, be connected positive supply node A, the negative supply node B of current rectifying and wave filtering circuit and up and down between the bridge circuit of two power tubes of bridge-type inverter.
Described multifunction module circuit MK: comprise anti-conduct electricity altogether the road, start preheat circuit and overcurrent, short-circuit protection circuit are formed, the outside is established 1～7 totally 7 pins altogether.The other end of the filament of the other end of the node A positive electricity in the pin 1 of described module and the described current rectifying and wave filtering circuit, the collector electrode of triode BG1, capacitor C4, the end of fluorescent tube DG is connected.The head end of the elementary winding a of the negative pole of the other end of the pin 2 of described module and the positive pole of diode D5, resistor R 2, the other end of resistor R 3, diode D6, the other end of capacitor C4, magnetic saturation transformer and the tail end of the secondary b of magnetic saturation transformer are connected.The pin 3 of described module is connected with the base stage of the triode BG1 of bridge-type inverter circuit, the positive pole of diode D6, an end of resistor R 4.The other end of the resistor R 4 in the pin 4 of described module and the bridge-type inverter circuit and the head end of the secondary winding b of magnetic saturation transformer T are connected.The collector electrode of triode BG2 in the pin 5 of described module and the semi-bridge type inverter circuit is connected.The pin 6 of described module is connected with the other end of the positive pole of electrolytic capacitor C3, resistor R 7, the other end of resistor R 5, the positive pole of diode D7 and the tail end of the secondary winding c of magnetic saturation transformer T.The pin 7 of described module and the negative pole of an end of resistor R 7, electrolytic capacitor C3 are connected with node B negative electricity in the current rectifying and wave filtering circuit.
Described anti-route triode BG3～BG4, diode D8～D9, resistor R 8～R11, the capacitor C7 composition of conducting electricity altogether.The emitter of described triode BG3 is connected with this module pin 3 with an end of resistor R 10, and (annotate: triode BG3 is the positive-negative-positive transistor, all the other are negative-positive-negative transistor), the base stage of triode BG3 is connected with the other end of resistor R 10, an end of resistor R 11 and the end of capacitor C7, and the collector electrode of triode BG3 is connected with this module pin 2 with an end of resistor R 8, the negative pole of diode D8, the positive pole of diode D12, the end of capacitor C10.The collector electrode of described triode BG4 is connected with the other end of the capacitor C7 other end and resistor R 11.The end of the other end of the base stage of triode BG4 and resistor R 8 and the R9 of resistor is connected.The emitter of triode BG4 is connected with this module pin 5 with the other end of resistance R 9, the positive pole of diode D9, the negative pole of diode D11, the positive pole of diode D10, an end of resistor R 12.The positive pole of described diode D8 is connected with the negative pole of diode D9.
Described startup preheat circuit: form by triode BG5, diode D10, resistor R 12～R14, electrolytic capacitor C8, capacitor C9～C10 and described anti-resistor R 10～R11, capacitor C7 and the triode BG3 that conducts electricity altogether in the road.The positive pole of described electrolytic capacitor C8 is connected with this module pin 4, the negative pole of electrolytic capacitor C8 is connected with an end of resistor R 14, and the other end of described resistor R 14 is connected with the base stage of triode BG5, an end of resistor R 13 and the end of capacitor C9.The emitter of described triode BG5 is connected with the negative pole of diode D10, the other end of resistor R 12, the other end of resistor R 13, the other end of capacitor C9 and the other end of capacitor C10.
Described overcurrent, short-circuit protection circuit: form jointly by controllable silicon QT, diode D11, resistor R 15～R16, electrolytic capacitor C11, light-emitting diode DL and the described anti-road of conducting electricity altogether.One end of described resistor R 16 is connected with this module pin 6, the other end of resistor R 16 is connected with the positive pole of electrolytic capacitor C11 and the trigger electrode of controllable silicon QT, and the negative pole of described electrolytic capacitor C11 is connected with this module pin 7 with the negative electrode of controllable silicon QT, the negative pole of diode D12.The anode of described controllable silicon QT is connected with the positive pole of diode D11 and the positive pole of light-emitting diode DL, and the negative pole of light-emitting diode DL is connected with an end of resistor R 15, and the other end of the R15 of resistor is connected with this module pin 1.
2. according to the described bridge-type inverter of claim 1, it is characterized in that: described bridge-type inverter is that self-excitation, its sharp semibridge system or the contrary formula of full-bridge become device.
3. according to the described bridge-type inverter of claim 1, it is characterized in that: described power tube can be bipolar transistor, field-effect transistor (MOSFET) and igbt (IGBT) etc.
4. according to the described multifunction module circuit of claim 1, it is characterized in that: described to be output as main electronic product with bridge-type inverter be neon-light electronic ballast, electronic transformer, electronic welding machine, frequency converter, ultrasonic drive, inverter power supply or electromagnetic oven etc.
5. according to the described multifunction module circuit of claim 1, it is characterized in that: described multifunction module circuit can be discrete component circuit, can be integrated circuit, also can be thick film circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910134551A CN101868106A (en) | 2009-04-14 | 2009-04-14 | Electronic ballast for fluorescent lamp and energy-saving lamp |
| PCT/CN2010/000318 WO2010118626A1 (en) | 2009-04-14 | 2010-03-15 | Electronic ballast for a fluorescent lamp and an energy-saving lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910134551A CN101868106A (en) | 2009-04-14 | 2009-04-14 | Electronic ballast for fluorescent lamp and energy-saving lamp |
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| Publication Number | Publication Date |
|---|---|
| CN101868106A true CN101868106A (en) | 2010-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910134551A Pending CN101868106A (en) | 2009-04-14 | 2009-04-14 | Electronic ballast for fluorescent lamp and energy-saving lamp |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101868106A (en) |
| WO (1) | WO2010118626A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625551A (en) * | 2011-01-26 | 2012-08-01 | 张玉清 | Electronic ballast for fluorescent lamp and energy saving lamp |
| CN102984864A (en) * | 2012-12-12 | 2013-03-20 | 宁波市镇海华泰电器厂 | LED lamp driving power supply with lightning protection and automatic temperature control functions |
| CN103167710A (en) * | 2013-03-28 | 2013-06-19 | 福州大学 | Self-excited open circuit and short circuit protection circuit for electromagnetic induction lamp |
| CN103313493A (en) * | 2012-03-07 | 2013-09-18 | 张玉清 | Electronic ballast with adjustable luminance |
| CN105101594A (en) * | 2014-05-06 | 2015-11-25 | 张玉清 | Dual-control dimming electronic ballast |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105050303A (en) * | 2015-09-11 | 2015-11-11 | 江西开昂科技股份有限公司 | Direct-current fluorescent lamp tube circuit with protective function |
| CN107666751B (en) * | 2016-10-26 | 2023-11-24 | 北京东方百士电子有限公司 | Signal switch control circuit of low-voltage mercury lamp preheating starting type electronic ballast |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5841241A (en) * | 1982-01-25 | 1998-11-24 | Ole K. Nilssen | Electronic ballast for fluorescent lamps |
| CN2552286Y (en) * | 2002-06-14 | 2003-05-21 | 张玉清 | Apparatus for preventing gas discharge lamp from sound resonance and protecting bridge inverter |
| US20090033244A1 (en) * | 2007-08-03 | 2009-02-05 | System General Corp. | Integrated circuit with a preheat control for a ballast |
-
2009
- 2009-04-14 CN CN200910134551A patent/CN101868106A/en active Pending
-
2010
- 2010-03-15 WO PCT/CN2010/000318 patent/WO2010118626A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625551A (en) * | 2011-01-26 | 2012-08-01 | 张玉清 | Electronic ballast for fluorescent lamp and energy saving lamp |
| CN103313493A (en) * | 2012-03-07 | 2013-09-18 | 张玉清 | Electronic ballast with adjustable luminance |
| CN102984864A (en) * | 2012-12-12 | 2013-03-20 | 宁波市镇海华泰电器厂 | LED lamp driving power supply with lightning protection and automatic temperature control functions |
| CN103167710A (en) * | 2013-03-28 | 2013-06-19 | 福州大学 | Self-excited open circuit and short circuit protection circuit for electromagnetic induction lamp |
| CN103167710B (en) * | 2013-03-28 | 2015-06-03 | 福州大学 | Self-excited open circuit and short circuit protection circuit for electromagnetic induction lamp |
| CN105101594A (en) * | 2014-05-06 | 2015-11-25 | 张玉清 | Dual-control dimming electronic ballast |
| CN105101594B (en) * | 2014-05-06 | 2020-02-25 | 张玉清 | Double-control dimming electronic ballast |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010118626A1 (en) | 2010-10-21 |
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