CN2455039Y - High-frequency double-pump type electronic ballst - Google Patents
High-frequency double-pump type electronic ballst Download PDFInfo
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- CN2455039Y CN2455039Y CN 00228584 CN00228584U CN2455039Y CN 2455039 Y CN2455039 Y CN 2455039Y CN 00228584 CN00228584 CN 00228584 CN 00228584 U CN00228584 U CN 00228584U CN 2455039 Y CN2455039 Y CN 2455039Y
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Abstract
The utility model relates to a high-frequency double-pump type electronic ballast. The utility model has the technical proposal that the high-frequency double-pump type electronic ballast comprises a transient over-voltage protection circuit, an electromagnetic interference filter circuit, a rectifying filter circuit, a diode isolation and antisurge current circuit, a voltage feed half-bridge inverter circuit, an output circuit, an abnormal state protection circuit, a repeated start circuit, and a high-frequency double-pump circuit. Through the interaction and the matching of each circuit, the utility model reaches the performance requirement standard of national GB/T15144 and the safety requirement standard of national GB15143. In addition, the utility model has the advantages of lower cost and reliable circuit operation.
Description
The utility model relates to a kind of high frequency double pump formula electric ballast that fluorescent tube is lighted startup of controlling.
At present, the electric ballast of Xiao Shouing is a lot of on the market, conclude and get up to have common bridge rectifier electrochemical capacitor filtered electrical sub-ballast, by stream filtered electrical sub-ballast, the Active Power Factor Correction electric ballast of high frequency double pump formula electric ballast and application-specific integrated circuit (ASIC).The electric ballast better performances of application-specific integrated circuit (ASIC), but cost height, difficult the popularization, common bridge rectifier electrochemical capacitor filtered electrical sub-ballast poor-performing, it is the product that is eliminated, better by stream filtered electrical sub-ballast power factor specification, but the lamp current crest is higher, harmonic content is higher to exceed standard, and the high frequency dual-pump circuit is a performance, all comparatively ideal circuit of price, but existing high frequency double pump formula electric ballast is difficult to satisfy simultaneously lamp current crest coefficient≤1.7, power factor 〉=0.95, the high request of the total harmonic content of electric current≤30% is at big electric current, high power, under the abnormal conditions of low-voltage, the buffer action deficiency between electrical network and the electric ballast causes electromagnetic pollution to electrical network, total harmonic content is too high, no surge current suppresses, and also is that performance index are difficult to reach the national standard of fluorescent tube with alternating electron ballast performance requirement GB/T15144, reaches national GB15143 safety requirements standard.
The purpose of this utility model is exactly in order to overcome the deficiencies in the prior art, a kind of national standard that can reach fluorescent tube with alternating electron ballast performance requirement GB/T15144 is provided, it is lower to reach national GB15143 safety requirements standard and cost, the reliable high frequency double pump of circuit working formula electric ballast.
The utility model one refreshing high frequency double pump formula electronic ballast is clamored; its technical scheme comprises: the transient protection; electromagnetic interference filter circuit; current rectifying and wave filtering circuit; diode-isolated and Antisurge current circuit; the voltage feed half-bridge inversion circuit; output circuit; abnormal state protection circuit; repeated priming circuit and high frequency dual-pump circuit: described transient protection; electromagnetic interference filter circuit; the rectifying and wave-filtering electricity eventually; diode-isolated and Antisurge current circuit are connected in series successively; to the contrary alternating current road of voltage feed half-bridge; high frequency dual-pump circuit and repeated priming circuit provide DC power supply: described voltage feed half-bridge inversion circuit; export higher-order of oscillation pulse to output circuit: described output circuit; under the effect of the higher-order of oscillation pulse of exporting from described voltage feed half-bridge inversion circuit; to the preheating of tube cathode elder generation; then produce the LC series resonance; make the fluorescent tube ignition trigger: described abnormal state protection circuit; it is a kind of trigger switch circuit; when abnormality appears in fluorescent tube; triggering and conducting under the effect of the abnormality signal that described output circuit is exported; make the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit: described repeated priming circuit; when the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit; export the repeated priming signal to the voltage feed half-bridge inversion circuit: described high frequency dual-pump circuit, the lamp current signal from described output circuit is proofreaied and correct.
Described current rectifying and wave filtering circuit is a bridge rectifier, at each the diode two ends that constitutes rectifier bridge electric capacity in parallel.
Described output circuit is by inductance L 2, thermistor PTC, capacitor C 9, C10, C11, C12 and fluorescent tube are formed, the output of described voltage feed half-bridge inversion circuit be connected inductance L 2 between the LP3 of tube cathode holds, thermistor PTC and capacitor C 9 parallel connections, be attempted by the LP1LP2 two ends of tube cathode after connecting with another capacitor C 10, capacitor C 11 is connected the DC power supply two ends after the C12 series connection again, capacitor C 11, the tie point of C12 are received the LP4 end of tube cathode.
Described high frequency dual-pump circuit is by diode D16, D17, D18, D19, resistance R 16, R17 and capacitor C 13, C14 forms, after capacitor C 13 and the diode D19 series connection, be connected in parallel on the DC power supply two ends, the negative electrode of D19 connects capacitor C 13, and anode connects the negative terminal of power supply, after diode D18 and capacitor C 14 series connection, be connected in parallel on the DC power supply two ends, the negative electrode of diode D18 connects the anode of power supply, and anode connects capacitor C 14, the negative electrode of diode D16 connects the LP4 end of described tube cathode, anode connecting resistance R16, the negative electrode of another terminating diode D19 of R16, the anode of diode D17 connects the negative electrode of diode D16, lie prone 7 negative electrode connecting resistance R17, the anode of another terminating diode D18 of R17.
Cross-over connection is one between the negative electrode of diode D19 in the LP1 of described tube cathode end and high frequency dual-pump circuit
Capacitor C 17 is coupled to the high frequency dual-pump circuit with high-frequency signal from the LP1 of tube cathode end.
Owing to adopted the transient protection, electromagnetic interference filter circuit, thereby damage electric ballast when avoiding line voltage overvoltage misphase, interference signal in the inhibition electrical network influences the operate as normal of electric ballast, and can suppress the electromagnetic interference that electric ballast self produces, not contaminated to guarantee electrical network; Owing to, thereby further reduced total harmonic content in the structure of each rectifier diode two ends of bridge rectifier filter circuit electric capacity in parallel; Owing to adopted diode-isolated and Antisurge current circuit, thereby, under the abnormal conditions of low-voltage, between electrical network and electric ballast, played buffer action, suppressed total harmonic content at big electric current; The surge current that electric ballast produces when powering up is also suppressed; Owing to adopted abnormal state protection circuit, when abnormality appearred in fluorescent tube, the abnormal state protection circuit conducting made the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit; Owing to adopted the repeated priming circuit, when the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit, to voltage feed half-bridge inversion circuit output repeated priming signal, oscillating circuit is vibrated again, thereby abnormal state protection circuit and the acting in conjunction of repeated priming circuit, oscillating circuit in the control voltage feed half-bridge inversion circuit is in the intermittent oscillation state, till abnormality is eliminated; Owing to adopt thermistor PTC and capacitor C 9 parallel connections, be attempted by the structure at the LP1LP2 two ends of tube cathode after connecting with another capacitor C 10 again, so the withstand voltage of these two electric capacity and thermistor all reduces, thereby reduced the cost of element, element also is difficult for punch through damage; Because capacitor C 17 of cross-over connection between the negative electrode of the diode D19 in the LP1 of described tube cathode end and high frequency dual-pump circuit, high-frequency signal held from the LP1 of tube cathode be coupled to the high frequency dual-pump circuit; Thereby high order harmonic component is produced attenuation filter, reduced the crest ratio of lamp current, further improved power factor; The circuit of the utility model each several part cooperatively interacts, and interacts, and every performance index are improved, thereby reaches the national standard of fluorescent tube with alternating electron ballast performance requirement GB/T15144, reaches national GB15143 safety requirements standard.
It below is drawing explanation of the present utility model;
Fig. 1 is the circuit block diagram of the utility model high frequency double pump formula electric ballast;
Fig. 2 is the concrete line map of the utility model high frequency double pump formula electric ballast;
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further details;
The circuit block diagram of the utility model high frequency double pump formula electric ballast as shown in Figure 1, comprise: the transient protection, electromagnetic interference filter circuit 1, current rectifying and wave filtering circuit 2, diode-isolated and Antisurge current circuit 3, voltage feed half-bridge inversion circuit 5, output circuit 6, abnormal state protection circuit 7, repeated priming circuit 4 and high frequency dual-pump circuit 8; Described transient protection, electromagnetic interference filter circuit 1, current rectifying and wave filtering circuit 2, diode-isolated and Antisurge current circuit 3 are connected in series successively, and to voltage feed half-bridge inversion circuit 5, high frequency dual-pump circuit 8 and repeated priming circuit 4 provide DC power supply V
A ' B 'Described voltage feed half-bridge inversion circuit 5 is to output circuit 6 output higher-order of oscillation pulses; Described output circuit 6 under the effect of the higher-order of oscillation pulse of exporting from described voltage feed half-bridge inversion circuit 5, to the preheating of fluorescent tube LP negative electrode elder generation, then produces the LC series resonance, makes fluorescent tube LP ignition trigger; Described abnormal state protection circuit 7 is a kind of trigger switch circuit, and when abnormality appearred in fluorescent tube LP, triggering and conducting under the effect of the abnormality signal that described output circuit 6 is exported made the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit 5; Described repeated priming circuit 4, when the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit 5, to voltage feed half-bridge inversion circuit (5) output repeated priming signal, oscillating circuit is vibrated again, thereby abnormal state protection circuit and the acting in conjunction of repeated priming circuit, oscillating circuit in the control voltage feed half-bridge inversion circuit is in the intermittent oscillation state, till abnormality is eliminated; Described high frequency dual-pump circuit 8 is to proofreading and correct from the lamp current signal of described output circuit 6.
The concrete line map of the utility model high frequency double pump formula electric ballast as shown in Figure 2, by fuse Fu, piezo-resistance Rv, inductance L
1A, L
1BWith capacitor C 1, C2 forms the transient protection, electromagnetic interference filter circuit 1, and piezo-resistance Rv is by fuse Fu and electrical network parallel connection, and the tie point of piezo-resistance Rv and fuse Fu is connected an inductance L
1A, the other end of piezo-resistance Rv connects another inductance L
1B, these two inductance L
1A, L
1BThe other end connect the two ends of capacitor C 1 respectively, be the transient protection, the output of electromagnetic interference filter circuit 1, one of capacitor C 2 terminates to inductance L
1BWith the tie point of capacitor C 1, other end ground connection.By diode D1, D2, D3, D4 and capacitor C 3, C3 ', C4, C4 ' forms bridge rectifier 2, at each the diode two ends that constitutes rectifier bridge electric capacity in parallel, also is about to capacitor C 3, C3 ', C4, C4 ' are connected in parallel on four diode D1 that constitute rectifier bridge respectively, D2, D3, the D4 two ends are to reduce total harmonic content.By diode D5, D6 and the thermistor NTC with negative temperature coefficient form diode-isolated and Antisurge current circuit 3, be plugged on after diode D5 and the thermistor NTC series connection between the positive input A ' of the forward output terminals A of current rectifying and wave filtering circuit 2 and voltage feed half-bridge inversion circuit 5, another diode D6 is plugged between the negative input B ' of the negative sense output B of rectification circuit and voltage feed half-bridge inversion circuit 5.Two diode D5, D6 under the abnormal conditions of low-voltage, can play buffer action at big electric current between electrical network and electric ballast, suppress total harmonic content; Electric ballast is when powering up, because the charging of filter capacitor can produce very big surge current, and thermistor NTC has negative temperature coefficient, so when just powering up, resistance is very big, afterwards, resistance diminishes, so add thermistor NTC, can suppress surge current effectively.By triode T1, T2, diode D9, D10, D11, D12, diac D13, resistance R 2 is to R11, R18, capacitor C 6, C7, C8 and pulse transformer n1, n2, n3 forms voltage feed half-bridge inversion circuit 5, comprising by resistance R 2, R3, R4, R6, R7, capacitor C 6, the start-up circuit that C7 and diac D13 constitute and by triode T1, T2 and pulse transformer n1, n2, the transformer feedback series connection push-pull type oscillating circuit that n3 constitutes, resistance R 2 is connected with R4, be connected DC power supply A ' B ' two ends, capacitor C 7 is in parallel with resistance R 7, and the negative terminal 8 ' of an end and power supply is connected, the other end and capacitor C 6, receive the tie point of resistance R 2 and R4 after resistance R 3 series connection, be connected across capacitor C 6 after resistance R 6 and the diac D13 series connection, between the base stage of the tie point of C7 and triode T1, constitute start-up circuit, the anode A ' of the collector electrode of triode T1 and power supply is connected, resistance R 8 of emitter serial connection links to each other with the collector electrode of triode T2 again, connects a resistance R 9 between the negative terminal B ' of the emitter of T2 and power supply, is connected in parallel on after resistance R 10 and pulse transformer n2 connect between the collector electrode of the base stage of T1 and T2, be connected in parallel on after resistance R 11 and the pulse transformer n3 series connection between the negative terminal B ' of the base stage of T2 and power supply, the end of pulse transformer n1 is linked the collector electrode of T2, and the other end is output Y, constitutes transformer feedback series connection push-pull type oscillating circuit; The negative electrode of diode D9 is connected the anode A ' of DC power supply; anode is connected to the collector electrode of T2; the negative electrode of diode D10 is connected to the collector electrode of T2; anode is connected to the negative terminal B ' of DC power supply; diode D11 is connected in parallel between the base stage and emitter of T1; the negative electrode of D11 connects the base stage of T1; anode connects the emitter of T1; diode D12 is connected in parallel between the base stage and emitter of T2; the negative electrode of D12 connects the base stage of T2, and anode connects the emitter of T2, plays the clamper protective effect; resistance R 5 and capacitor C 8 are connected in parallel on respectively between the collector electrode of the anode A ' of power supply and T2, and resistance R 18 is connected in parallel between the negative terminal B ' of the collector electrode of T2 and power supply.Described output circuit 6 is by inductance L 2, thermistor PTC, capacitor C 9, C10, C11, C12 and fluorescent tube LP form, between the LP3 end of the output Y of described voltage feed half-bridge inversion circuit 5 and fluorescent tube LP negative electrode, be connected inductance L 2, thermistor PTC and capacitor C 9 parallel connections, be attempted by the LP1LP2 two ends of fluorescent tube LP negative electrode after connecting with another capacitor C 10 again, capacitor C 11, be connected DC power supply A ' B ' two ends after the C12 series connection, capacitor C 11, the tie point of C12 are received the LP4 end of fluorescent tube LP negative electrode.The course of work of voltage feed half-bridge inversion circuit 5 and output circuit 6 is: when energized, direct voltage A ' B ' is via resistance R 2, R3, R4, R6, R7, capacitor C 6, the start-up circuit that C7 and diac D13 constitute make triode T2 start conducting, thereby make by triode T1, T2, resistance R 8 to R11 and pulse transformer n1, n2, the transformer feedback series connection push-pull type oscillating circuit that n3 constitutes produces vibration, when inductance L 2 and capacitor C 9, C10, and capacitor C 11 are when series resonance takes place in C12, will form the resonance high-voltage pulse at the LP1LP2 of fluorescent tube LP negative electrode end, make fluorescent tube LP ignition trigger.Electric ballast is to the preheating delayed startup of fluorescent tube LP negative electrode, that lean on is thermistor PTC, thermistor PTC is a kind of switch thermistor, its Curie point is 60 ℃～120 ℃, when temperature is lower than Curie point, thermistor PTC is equivalent to short circuit, preheat curent flow through thermistor PTC and capacitor C 10, after thermistor PTC temperature was elevated to Curie point, resistance was elevated to rapidly more than the 10M Ω, preheat curent is by capacitor C 9, C10 and inductance L 2, capacitor C 11, C12 causes the LC series resonance immediately, apply a very high resonance potential at the LP1LP2 two ends of fluorescent tube LP negative electrode, make fluorescent tube LP ignition trigger.In circuit design, if will directly be attempted by the LP1LP2 two ends of fluorescent tube LP negative electrode after thermistor and the electric capacity parallel connection, then the requirement of withstand voltage of thermistor and electric capacity is just very high, reach volt more than 1,000, element is easy to puncture, after adopting thermistor PTC and capacitor C 9 parallel connections to connect with another capacitor C 10 again, present embodiment is attempted by the structure at the LP1LP2 two ends of fluorescent tube LP negative electrode, because series connection dividing potential drop, so thermistor and the withstand voltage of two electric capacity all are minimized, thereby element is not fragile, has improved circuit reliability.Described abnormal state protection circuit 7 is by resistance R 12; R13; R14; R15; capacitor C 15, C16; diode D15; diac D14 and triode T3 form, capacitor C 15; resistance R 14 is connected with R15; be connected between the negative terminal B ' of the LP3 end of negative electrode of fluorescent tube LP and DC power supply, so as taking-up abnormality signal, the anode connecting resistance R14 of diode D15; the tie point of R15; negative electrode and diac D14, resistance R 12 is connected, and receives the base stage of triode T3; the emitter of T3 meets the negative terminal B ' of power supply; collector electrode connects the base stage of T2, and resistance R 13 and capacitor C 16 parallel connections are connected between the negative terminal B ' of the negative electrode of diode D15 and power supply.Described repeated priming circuit 4 is by resistance R 1, capacitor C 5 and diode D7, D8 forms, be connected in parallel on DC power supply A ' B ' two ends after resistance R 1 and capacitor C 5 series connection, the anode of diode D7 is connected to the tie point of R1 and C5, negative electrode is connected to the collector electrode of T2, the anode of diode D8 is connected to the tie point of R1 and C5, and negative electrode is connected to capacitor C 6, the tie point of C7.The course of work is: when abnormality appears in fluorescent tube, take out abnormal signal from an end LP3 of the negative electrode of fluorescent tube, make the triode T3 saturation conduction in the abnormal state protection circuit, thereby the triode T2 in the voltage feed half-bridge inversion circuit 5 loses bias voltage, the oscillating circuit failure of oscillations; By the repeated priming circuit; oscillating circuit is vibrated again; if this moment, abnormality was not eliminated yet; make the oscillating circuit failure of oscillations once more by abnormal state protection circuit; thereby the oscillating circuit in the control voltage feed half-bridge inversion circuit is in the intermittent oscillation state, till abnormality is eliminated.Described high frequency dual-pump circuit 8 is by diode D16, D17, D18, D19, resistance R 16, R17 and capacitor C 13, C14 forms, and after capacitor C 13 and the diode D19 series connection, is connected in parallel on DC power supply A ' B ' two ends, the negative electrode of D19 connects capacitor C 13, anode meets the negative terminal B ' of power supply, after diode D18 and capacitor C 14 series connection, is connected in parallel on DC power supply A ' B ' two ends, the negative electrode of diode D18 meets the anode A ' of power supply, anode connects capacitor C 14, and the negative electrode of diode D16 meets the other end LP4 of described fluorescent tube LP negative electrode, anode connecting resistance R16, the negative electrode of another terminating diode D19 of R16, the anode of diode D17 connects the negative electrode of diode D16, the negative electrode connecting resistance R17 of D17, the anode of another terminating diode D18 of R17.Capacitor C 17 of cross-over connection between the negative electrode of diode D19 in the LP1 of described fluorescent tube LP negative electrode end and high frequency dual-pump circuit 8 is held high-frequency signal and to be coupled to high frequency dual-pump circuit 8 from the LP1 of tube cathode.High frequency lamp current through the output of the LP4 of fluorescent tube LP negative electrode end is a part of through capacitor C 11, C12 returns power supply, another part is respectively through D17, R17, C14 and D16, R16, the C13 rectifying and wave-filtering, produce positive and negative two boost voltage Δ V, through diode D18, the 100HZ pulsating direct current behind D19 and the bridge rectifier superposes respectively, and capacitor C 17 is taken out the cathode terminal that high-frequency signal feeds back to the diode D19 in the high frequency dual-pump circuit 7 at the LP1 of fluorescent tube LP negative electrode end, it also is the end of positive boost voltage Δ V, superimposed with the voltage of this point, the crest voltage of reduction lamp current forms the smaller direct voltage of a ripple coefficient, thereby reduce the crest ratio of lamp current, improve the power factor of circuit.
The utility model cooperatively interacts through the each part mentioned above circuit, interacts, and reaches the national standard of fluorescent tube with alternating electron ballast performance requirement GB/T15144, and it is lower to reach national GB15143 safety requirements standard and cost, and circuit working is reliable.Specifically, a kind of high frequency double pump of the utility model formula electric ballast reaches following technical performance index:
1. the overvoltage protection measure is arranged, damage electric ballast when avoiding the overvoltage misphase.
2. electromagnetic interference filter circuit is arranged, and the interference signal that suppresses in the electrical network influences the normal worker of electric ballast
Do, and can suppress the electromagnetic interference that electric ballast self produces, not contaminated to guarantee electrical network.
3. the measure of Antisurge current is arranged.
4. power switch pipe prevents reverse voltage, the overvoltage protection measure.
5. delayed startup circuit (delay time is between 0.4～2us) is arranged.
6. the repeated priming abnormal state protection circuit is arranged.
7. can be in 130V～260V voltage range, and ambient temperature normal startup work in-10 ℃～+ 50 ℃ temperature ranges.
8. line power factor PF 〉=0.95, current harmonics total amount THD≤30%, lumen coefficient u 〉=0.95, lamp current crest coefficient CF≤1.7.
Claims (11)
1. high frequency double pump formula electric ballast, it is characterized in that, comprise: the transient protection, electromagnetic interference filter circuit (1), current rectifying and wave filtering circuit (2), diode-isolated and Antisurge current circuit (3), voltage feed half-bridge inversion circuit (5), output circuit (6), abnormal state protection circuit (7), repeated priming circuit (4) and high frequency dual-pump circuit (8); Described transient protection; electromagnetic interference filter circuit (1), current rectifying and wave filtering circuit (2), diode-isolated and Antisurge current circuit (3) are connected in series successively; to voltage feed half-bridge inversion circuit (5), high frequency dual-pump circuit (8) and repeated priming circuit (4) provide DC power supply (V
A ' S '); Described voltage feed half-bridge inversion circuit (5) is to the pulse of output circuit (6) the output higher-order of oscillation; Described output circuit (6) under the effect of the higher-order of oscillation pulse of exporting from described voltage feed half-bridge inversion circuit (5), to the preheating of fluorescent tube (LP) negative electrode elder generation, then produces the LC series resonance, makes fluorescent tube (LP) ignition trigger; Described abnormal state protection circuit (7), it is a kind of trigger switch circuit, when fluorescent tube (LP) when abnormality occurring, triggering and conducting under the effect of the abnormality signal of described output circuit (6) output makes the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit (5); Described repeated priming circuit (4) is when the oscillating circuit failure of oscillations of voltage feed half-bridge inversion circuit (5), to voltage feed half-bridge inversion circuit (5) output repeated priming signal; Described high frequency dual-pump circuit (8) is to proofreading and correct from the lamp current signal of described output circuit (6).
2. high frequency double pump formula electric ballast according to claim 1 is characterized in that described transient protection, and electromagnetic interference filter circuit (1) is by fuse Fu, piezo-resistance Rv, inductance L
1A, L
1BWith capacitor C 1, C2 forms, and piezo-resistance Rv is by fuse Fu and electrical network parallel connection, and the tie point of piezo-resistance Rv and fuse Fu is connected an inductance L
1A, the other end of piezo-resistance Rv connects another inductance L
1B, these two inductance L
1A, L
1BThe other end connect the two ends of capacitor C 1 respectively, be the transient protection, the output of electromagnetic interference filter circuit (1), one of capacitor C 2 terminates to inductance L
1BWith the tie point of capacitor C 1, other end ground connection.
3. high frequency double pump formula electric ballast according to claim 1 is characterized in that described current rectifying and wave filtering circuit (2) is a bridge rectifier, at each the diode two ends that constitutes rectifier bridge electric capacity in parallel.
4. high frequency double pump formula electric ballast according to claim 1, it is characterized in that described diode-isolated and Antisurge current circuit (3) are by diode D5, D6 and the thermistor NTC with negative temperature coefficient form, be plugged on after diode D5 and the thermistor NTC series connection between the forward output (A) of current rectifying and wave filtering circuit (2) and the positive input of voltage feed half-bridge inversion circuit (5) (A '), another diode D6 is plugged between the negative sense output (B) of current rectifying and wave filtering circuit (2) and the negative input of voltage feed half-bridge inversion circuit (5) (B ').
5. high frequency double pump formula electric ballast according to claim 1, it is characterized in that described voltage feed half-bridge inversion circuit (5) is by triode T1, T2, diode D9, D10, D11, D12, diac D13, resistance R 2 is to R11, R18, capacitor C 6, C7, C8 and pulse transformer n1, n2, n3 forms, comprising by resistance R 2, R3, R4, R6, R7, capacitor C 6, the start-up circuit that C7 and diac D13 constitute and by triode T1, T2, resistance R 8 to R11 and pulse transformer n1, n2, the transformer feedback series connection push-pull type oscillating circuit that n3 constitutes, resistance R 2 is connected with R4, be connected DC power supply (A ' B ') two ends, capacitor C 7 is in parallel with resistance R 7, the negative terminal of one end and power supply (B ') be connected, the other end and capacitor C 6 are received the tie point of resistance R 2 and R4 after resistance R 3 series connection, be connected across capacitor C 6 after resistance R 6 and the diac D13 series connection, between the base stage of the tie point of C7 and triode T1, constitute start-up circuit, and the collector electrode of triode T1 and the anode of power supply (A ') is connected, emitter is connected in series a resistance R 8 and links to each other with the collector electrode of triode T2, connect a resistance R 9 between the emitter of T2 and the negative terminal of power supply (B '), be connected in parallel on after resistance R 10 and the pulse transformer n2 series connection between the collector electrode of the base stage of T1 and T2, be connected in parallel on after resistance R 11 and the pulse transformer n3 series connection between the base stage of T2 and the negative terminal of power supply (B '), the end of pulse transformer n1 is linked the collector electrode of T2, the other end is output (Y), constitutes transformer feedback series connection push-pull type oscillating circuit; The negative electrode of diode D9 is connected the anode (A ') of DC power supply; anode is connected to the collector electrode of T2; the negative electrode of diode D10 is connected to the collector electrode of T2; anode is connected to the negative terminal (B ') of DC power supply; diode D11 is connected in parallel between the base stage and emitter of T1; the negative electrode of D11 connects the base stage of T1; anode connects the emitter of T1; diode D12 is connected in parallel between the base stage and emitter of T2; the negative electrode of D12 connects the base stage of T2, and anode connects the emitter of T2, plays the clamper protective effect; resistance R 5 and capacitor C 8 are connected in parallel on respectively between the collector electrode of the anode (A ') of power supply and T2, and resistance R 18 is connected in parallel between the collector electrode of T2 and the negative terminal of power supply (B ').
6. high frequency double pump formula electric ballast according to claim 1.It is characterized in that described output circuit (6) is by inductance L 2, thermistor PTC, capacitor C 9, C10, C11, C12 and fluorescent tube (LP) are formed, between the LP3 end of the output (Y) of described voltage feed half-bridge inversion circuit (5) and fluorescent tube (LP) negative electrode, be connected inductance L 2, thermistor PTC and capacitor C 9 parallel connections, be attempted by the LP1LP2 two ends of fluorescent tube (LP) negative electrode after connecting with another capacitor C 10 again, capacitor C 11, be connected DC power supply (A ' B ') two ends after the C12 series connection, capacitor C 11, the tie point of C12 are received the LP4 end of fluorescent tube (LP) negative electrode.
7. high frequency double pump formula electric ballast according to claim 6 is characterized in that described thermistor PTC is a kind of switch thermistor, and its Curie point is 60 ℃～120 ℃.
8. high frequency double pump formula electric ballast according to claim 1; it is characterized in that described abnormal state protection circuit (7) is by resistance R 12; R13; R14; R15; capacitor C 15; C16; diode D15; diac D14 and triode T3 form; capacitor C 15, resistance R 14 is connected with R15, is connected between the LP3 end of negative electrode of fluorescent tube (LP) and the negative terminal of DC power supply (B '); so that take out the abnormality signal; the anode connecting resistance R14 of diode D15, the tie point of R15, negative electrode and diac D14; resistance R 12 series connection; receive the base stage of triode T3, the emitter of T3 connects the negative terminal of power supply (B '), and collector electrode connects the base stage of T2; resistance R 13 and capacitor C 16 parallel connections are connected between the negative electrode of diode D15 and the negative terminal of power supply (B ').
9. high frequency double pump formula electric ballast according to claim 1, it is characterized in that described repeated priming circuit (4) is by resistance R 1, capacitor C 5 and diode D7, D8 forms, be connected in parallel on DC power supply (A ' B ') two ends after 5 series connection of resistance R 1 and capacitor C, the anode of diode D7 is connected to the tie point of R1 and C5, and negative electrode is connected to the collector electrode of T2, and the anode of diode D8 is connected to the tie point of R1 and C5, negative electrode is connected to capacitor C 6, the tie point of C7.
10. high frequency double pump formula electric ballast according to claim 1, it is characterized in that described high frequency dual-pump circuit (8) is by diode D16, D17, D18, D19, resistance R 16, R17 and capacitor C 13, C14 forms, after capacitor C 13 and the diode D19 series connection, be connected in parallel on DC power supply (A ' B ') two ends, the negative electrode of D19 connects capacitor C 13, and anode connects the negative terminal (B ') of power supply, after diode D18 and capacitor C 14 series connection, be connected in parallel on DC power supply (A ' B ') two ends, the negative electrode of diode D18 connects the anode of power supply (A '), and anode connects capacitor C 14, the negative electrode of diode D16 connects the LP4 end of described fluorescent tube (LP) negative electrode, anode connecting resistance R16, the negative electrode of another terminating diode D19 of R16, the anode of diode D17 connects the negative electrode of diode D16, the negative electrode connecting resistance R17 of D17, the anode of another terminating diode D18 of R17.
11. according to claim 6 or 10 described high frequency double pump formula electric ballasts, it is characterized in that, capacitor C 17 of cross-over connection between the negative electrode of diode D19 in the LP1 of described fluorescent tube (LP) negative electrode end and high frequency dual-pump circuit (8) is held high-frequency signal and to be coupled to high frequency dual-pump circuit (8) from the LP1 of tube cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228584 CN2455039Y (en) | 2000-06-26 | 2000-06-26 | High-frequency double-pump type electronic ballst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228584 CN2455039Y (en) | 2000-06-26 | 2000-06-26 | High-frequency double-pump type electronic ballst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2455039Y true CN2455039Y (en) | 2001-10-17 |
Family
ID=33592036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00228584 Expired - Fee Related CN2455039Y (en) | 2000-06-26 | 2000-06-26 | High-frequency double-pump type electronic ballst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2455039Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902867A (en) * | 2009-05-26 | 2010-12-01 | 东莞市百分百科技有限公司 | Protection circuit for electronic ballast |
| CN103138605A (en) * | 2011-11-28 | 2013-06-05 | 何曙光 | Alternating current (AC) / direct current (DC) switching circuit of high frequency and low frequency |
-
2000
- 2000-06-26 CN CN 00228584 patent/CN2455039Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902867A (en) * | 2009-05-26 | 2010-12-01 | 东莞市百分百科技有限公司 | Protection circuit for electronic ballast |
| CN103138605A (en) * | 2011-11-28 | 2013-06-05 | 何曙光 | Alternating current (AC) / direct current (DC) switching circuit of high frequency and low frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |