CN105554993A - Energy saving lamp - Google Patents
Energy saving lamp Download PDFInfo
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- CN105554993A CN105554993A CN201610114290.1A CN201610114290A CN105554993A CN 105554993 A CN105554993 A CN 105554993A CN 201610114290 A CN201610114290 A CN 201610114290A CN 105554993 A CN105554993 A CN 105554993A
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- Prior art keywords
- circuit
- diode
- electric capacity
- filter circuit
- power switch
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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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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention discloses an energy saving lamp, comprising a power supply filter circuit, a rectification and filter circuit, a passive PFC circuit, a half-bridge inverter circuit and a filament circuit; the power supply filter circuit is electrically connected with the output end of commercial power and is used for suppressing electromagnetic interference caused by radiation and conduction; the rectification and filter circuit is electrically connected with the power supply filter circuit and is used for rectifying and filtering the commercial power; the passive PFC circuit is electrically connected with the rectification and filter circuit and is used for improving a power factor; the half-bridge inverter circuit is electrically connected with the passive PFC circuit; the half-bridge inverter circuit comprises two power switch tubes; the emitter of every power switch tube is connected to a resistor in series; a capacitor is connected between the base and the emitter in parallel; the filament circuit is electrically connected with the half-bridge inverter circuit; the filament circuit comprises a fluorescent lamp, an inductor, a capacitor and a thermistor connected with the capacitor in parallel. The energy saving lamp is featured by long service life and high power factor.
Description
Technical field
The present invention relates to field of lighting devices, particularly relate to a kind of energy-saving lamp.
Background technology
Electricity-saving lamp, is also called Electricity-saving lamp bulb, electronic bulbs, compact fluorescent lamp and Integral fluorescent lamp, refers to and fluorescent lamp is become an overall lighting apparatus with ballast combinations.Ballast divides electric ballast and Inductive ballast, electricity-saving lamp is in the market more use electric ballast, electric ballast is light small and exquisite, can integrate with fluorescent tube etc., simultaneously, also have starter function concurrently, can also by improving the scintillation of power frequency or current waveform (as becoming square wave) improvement or elimination electricity-saving lamp, electricity-saving lamp can also be made to use DC power supply by power inverter process, therefore traditional inductance type rectifier replace by the electric ballast of growing maturation.But the production also just due to electric ballast is simple, and circuit is simple, and element is few, and cost is low, so just cause shortcomings such as not growing its useful life.
Summary of the invention
The object of the invention is to, for above-mentioned defect of the prior art, provide a kind of energy-saving lamp, this energy-saving lamp increases useful life, and power factor improves.
For achieving the above object, present invention employs following technical scheme: a kind of energy-saving lamp, it comprises electric source filter circuit, current rectifying and wave filtering circuit, passive PFC circuit, half-bridge inversion circuit and heater chain, described electric source filter circuit electrical connection civil power output, suppresses because of the electromagnetic interference caused by radiation and conduction; Described current rectifying and wave filtering circuit electric connection of power supply filter circuit, carries out rectification and filtering to civil power; Described passive PFC circuit electrical connection current rectifying and wave filtering circuit, for improving power factor; Described half-bridge inversion circuit electrical connection passive PFC circuit, this half-bridge inversion circuit comprises two power switch pipes, and the emitter of each power switch pipe is connected the base stage electric capacity in parallel with between emitter of a resistance, each power switch pipe; Described heater chain electrical connection half-bridge inversion circuit, this heater chain forms primarily of fluorescent lamp, inductance L 2, electric capacity C5 and the thermistor in parallel with electric capacity C5.
In addition, the present invention also provides following attached technical scheme:
Described electric source filter circuit is LC-π type filter circuit.
Described current rectifying and wave filtering circuit is bridge rectifier filter circuit.
Described passive PFC circuit forms primarily of diode DO1, diode D02, diode D03, electric capacity C03 and electric capacity C04, and wherein, diode DO1, diode D02 and diode D03 connect mutually; Electric capacity C03 and diode DO1 and diode D02 is parallel with one another; Electric capacity C04 and diode D02 and diode D03 is parallel with one another.
Compared to prior art, advantage of the present invention is: energy-saving lamp of the present invention comprises electric source filter circuit, current rectifying and wave filtering circuit, passive PFC circuit, half-bridge inversion circuit, and heater chain, wherein passive PFC circuit makes the power factor of energy-saving lamp bring up to 0.86 ~ 0.98, the power switch pipe electric connection resistance of half-bridge inversion circuit and electric capacity, delay the Regenerative feedback process of circuit, power switch pipe is not allowed to be in critical excitation state, the thermistor of heater chain has filament pre-heating function simultaneously, prevent fluorescent lamp tube two ends from turning black in early days, the comprehensive function of half-bridge inversion circuit and heater chain extends fluorescent lamp tube useful life.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of energy-saving lamp of the present invention.
Fig. 2 is the circuit diagram of energy-saving lamp of the present invention.
Fig. 3 is the amplification circuit diagram of electric source filter circuit in Fig. 2.
Fig. 4 is the amplification circuit diagram of current rectifying and wave filtering circuit in Fig. 2.
Fig. 5 is the amplification circuit diagram of passive PFC circuit in Fig. 2.
Fig. 6 is the amplification circuit diagram of half-bridge inversion circuit in Fig. 2.
Fig. 7 is the amplification circuit diagram of heater chain in Fig. 2.
Embodiment
Below in conjunction with preferred embodiment and accompanying drawing thereof, technical solution of the present invention is further non-limitingly described in detail.
With reference to Fig. 1, it is structured flowchart of the present invention, energy-saving lamp comprises electric source filter circuit 1, current rectifying and wave filtering circuit 2, passive PFC circuit 3, half-bridge inversion circuit 4 and heater chain 5, electric source filter circuit 1 is for suppressing because of the electromagnetic interference caused by radiation and conduction, current rectifying and wave filtering circuit 2 is for being converted to level and smooth direct current by alternating current, passive PFC circuit 3 is for improving power factor, and half-bridge inversion circuit 4 is for being alternating current by DC conversion, and heater chain 5 is for being subject to thermoluminescence.
With reference to Fig. 2, electric source filter circuit 1 and civil power output are electrically connected mutually.With further reference to Fig. 3, electric source filter circuit 1 is LC-π type filter circuit, primarily of two electric capacity and an inductance composition, for suppressing because of the electromagnetic interference caused by radiation and conduction, require that the electrical equipment come by the external world disturbs (as wireless device, household electrical appliance, motor vehicles, lightning, cosmic noise, sunspot etc.), do not affect the work of subsequent conditioning circuit, high-frequency interferencing signal simultaneously from subsequent conditioning circuit inside does not also cause interference, to reach electromagnetic compatibility by conduction pattern and radiation mode to other wireless device in same environment.
With reference to Fig. 2, current rectifying and wave filtering circuit 2 and electric source filter circuit 1 are electrically connected mutually.With further reference to Fig. 4, current rectifying and wave filtering circuit 2 is bridge rectifier filter circuit, form primarily of diode D1, diode D2, diode D3, diode D4 and electrochemical capacitor C1, four diode composition bridge rectifiers, alternating current is converted to direct current, electrochemical capacitor C1 carries out filtering to direct current again, makes it become level and smooth direct current.
With reference to Fig. 2, passive PFC circuit 3 and current rectifying and wave filtering circuit 2 are electrically connected mutually.With further reference to Fig. 5, passive PFC circuit 3 forms primarily of diode DO1, diode D02, diode D03, electric capacity C03 and electric capacity C04.Wherein, diode DO1, diode D02 and diode D03 connect mutually; Electric capacity C03 and diode DO1 and diode D02 is parallel with one another; Electric capacity C04 and diode D02 and diode D03 is parallel with one another; The negative pole of diode D01 and the positive pole of electric capacity C03 are connected electrically in the positive pole of the electrochemical capacitor C1 in current rectifying and wave filtering circuit 2; The positive pole of diode D03 and the negative electricity of electric capacity C04 are connected to the negative pole of the electrochemical capacitor C1 in current rectifying and wave filtering circuit 2.
During fluorescent tube for below 15W, electric capacity C03 and electric capacity C04 all gets 4.7 μ F/250V; During fluorescent tube for 28W ~ 15W, electric capacity C03 and electric capacity C04 all gets 10 μ F/250V; During fluorescent tube for more than 30W, electric capacity C03 and electric capacity C04 all gets 22 μ F/250V; And no matter which kind of specification fluorescent tube, diode D01, diode D02 and diode D03 all get 1N4007.If an electrodeless electric capacity (33n/630V) in parallel is of great advantage to raising power factor at electric capacity C03 two ends.
Passive PFC circuit 3 is for improving power factor, and through practice, power factor can bring up to 0.86 ~ 0.98, and total harmonic distortion can be controlled within 0.35% ~ 38%.
With reference to Fig. 2, half-bridge inversion circuit 4 and passive PFC circuit 3 are electrically connected mutually.Form active half-bridge branch road with further reference to power switch pipe Q1 in Fig. 6, figure and power switch pipe Q2, electric capacity C4 and electric capacity C6 forms passive half-bridge branch road, and the mid-point voltage of half-bridge is the half of direct voltage, is E/2.In the present embodiment, power switch pipe Q1 and power switch pipe Q2 all selects MJE13003 type, and electric capacity C4 and electric capacity C6 all selects 47nF/250V.
Power switch pipe Q1 and power switch pipe Q2 is the significant components in circuit, plays a part power switch, during selection, should pay the utmost attention to its switch parameter.Its operation principle is: after adding power source, the electric current provided by direct voltage charges to integrating capacitor C2 through resistance R1, once after this voltage meets and exceeds the breakover voltage (about 30 ~ 40V) of diac D8, this diode D8 punctures conducting, and have electric current to flow into the base stage of power switch pipe Q2, make Q2 conducting, now, electric current flows through collector electrode → ground that path is the armature winding L1c → power switch pipe Q2 of power supply → electric capacity C4 → heater chain 5 → magnetic ring transformer.Particularly,
The growth trend of the collector current of power switch pipe Q2 produces induced electromotive force on the armature winding L1c of magnetic ring transformer, level winding L 1a, L1b also produce induced electromotive force secondarily simultaneously, its polarity to make on each winding with the Same Name of Ends represented as just, thus the base potential of power switch pipe Q2 is raised, base current, colleeting comb strengthen further, namely produce following chain reaction in circuit:
The positive feedback effect of this interlock type makes power switch pipe Q2 conducting and saturated.Conveniently, after power switch pipe Q2 conducting, the electric charge of electric capacity C2 is discharged by diode D6 and power switch pipe Q2, and its voltage drop, no longer makes trigger tube conducting, and this branch road also no longer has an impact to power switch pipe Q2 base stage.So, the triggering signal provided by resistance R1, electric capacity C2 and diode D8 only after power supply is connected to power switch pipe Q2 trigger action.After power switch pipe Q1, Q2 take turns to operate, its operating frequency is higher, and power switch pipe Q2 is very short for deadline, and within the time short like this, electric capacity C2 has little time to be charged fully.And after power switch pipe Q2 conducting, electric capacity C2 discharges again.Like this, the voltage above it is the sawtooth waveforms that some amplitudes are very little, does not reach the voltage being enough to make diode D8 conducting.Therefore, once circuit conversion, power switch pipe Q1 and power switch pipe Q2 is in turn after conducting and cut-off, and diode D8 will no longer can conducting, also cuts little ice to power switch pipe Q2.
After power switch pipe Q2 conducting, start ic2, ib2, vb2 all to increase, at a time vb2 reaches a peak value, ib2 also has a peak value, later because magnet ring permeability declines, vb2, vL1b decline with the rising of ic2, and ib2 also declines, do not pulled away by collector junction because base exists a large amount of minority carriers, pipe is in saturation condition.
Along with the increase of ic2 and the decline of magnet ring permeability, there will be the situation of the voltage vL1b on magnet ring winding lower than vb2, make base current reverse, ib2 becomes negative value, rely on this reverse current, the electronics making base unnecessary disappears, power switch pipe Q2 exits from saturation condition, enter magnifying state, once enter magnifying state, the positive feedback descending through magnet ring of current i c2 makes ib2 reduce, ic2 reduces further, power switch pipe Q2 soon saltus step is cut-off, meanwhile, voltage on magnet ring winding L1a changes polarity, on just lower negative, after postponing a period of time, power switch pipe Q1 has electric current to produce, induced electromotive force contrary when generation being increased with ic2 in magnetic ring transformer, and form following chain reaction:
Result power switch pipe Q1 becomes conducting from cut-off rapidly.
Said process repeats down again and again, power switch pipe Q1, Q2 be conducting and cut-off in turn, the square-wave voltage of alternation is formed between two half-bridge mid point, its amplitude is that (voltage of active half-bridge mid point drops to 0 by E to E/2, be later E by 0 saltus step again, and the voltage of passive half-bridge mid point is E/2).
Due to the loss of power switch pipe itself, its temperature being made to increase, cause its Parameters variation, exacerbate the unreliability of circuit working, in order to reduce switching loss, in circuit design, really must work on off state by guaranteed output switching tube.Therefore, to connect a resistance RE1 at the emitter of power switch pipe Q1, simultaneously an electric capacity C06 in parallel between its base stage with emitter; The emitter series resistance RE2 of power switch pipe Q2, an electric capacity C07 in parallel between base stage with emitter; Delay the Regenerative feedback process of circuit, do not allow pipe be in critical excitation state.
In this half-bridge inversion circuit 4, also comprise electric capacity C3, this electric capacity C3 plays afterflow effect.Specifically, the ON time of each triode of power switch pipe Q1, Q2 all should be less than half period, namely there is one section of Dead Time between two triodes, in order to avoid two triodes conductings simultaneously and burning.But the electric current flowing through heater chain 5 must be again continuous print alternating current, and so electric capacity C3 just plays afterflow effect, two power switch pipes Q1, Q2 not conducting time, it can ensure electric current and flow through heater chain 5, makes current continuity.
Have high-frequency pulse current to flow through electric capacity C3 due to during work, it will generate heat because of high-frequency loss, so the polypropylene capactive that this electric capacity adopts loss little is better, and away from heat generating component when installing.Due to the afterflow effect of electric capacity C3, flow through the electric current of electric capacity C3 and to flow through two power switch pipe Q1, Q2 electric currents superimposed, forms a continuous print close to sinusoidal wave electric wave, flow through heater chain 5, the continuous normal luminous of guarantee fluorescent tube.
With reference to Fig. 2, heater chain 5 and half-bridge inversion circuit 4 are electrically connected mutually.With further reference to Fig. 7, heater chain 5 forms primarily of fluorescent lamp, inductance L 2, electric capacity C5 and the thermistor T in parallel with electric capacity C5.Fluorescent lamp is in series as load and inductance L 2, between two half-bridge mid point being connected across half-bridge inversion circuit 4, electric current flows through armature winding L1c → power switch pipe Q that path is power supply → electric capacity C4 → Filament of fluorescent lamp → electric capacity C5 → Filament of fluorescent lamp → inductance L 2 → magnetic ring transformer
2collector electrode → ground.Therefore, the alternating voltage sent here by half-bridge inversion circuit 4, through start-up capacitance C5, the series resonance effect of inductance L 2, its electric current becomes close to sinusoidal wave, and creates a very high voltage at electric capacity C5 two ends and be added on fluorescent lamp, thus is lighted by tube starting.Thermistor T is the thermistor of positive temperature coefficient, has Filament of fluorescent lamp preheat function, prevents fluorescent lamp tube two ends from turning black in early days, improves light fixture useful life.
In sum, the useful life of energy-saving lamp of the present invention improves, and lamp power factor improves, and suppresses because of radiation and conducts the electromagnetic interference caused.
It is pointed out that above-mentioned preferred embodiment is only and technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (4)
1. an energy-saving lamp, is characterized in that: it comprises electric source filter circuit, current rectifying and wave filtering circuit, passive PFC circuit, half-bridge inversion circuit and heater chain,
Described electric source filter circuit electrical connection civil power output, suppresses because of the electromagnetic interference caused by radiation and conduction;
Described current rectifying and wave filtering circuit electric connection of power supply filter circuit, carries out rectification and filtering to civil power;
Described passive PFC circuit electrical connection current rectifying and wave filtering circuit, for improving power factor;
Described half-bridge inversion circuit electrical connection passive PFC circuit, this half-bridge inversion circuit comprises two power switch pipes (Q1, Q2), the emitter of power switch pipe (Q1) is connected a resistance (RE1), an electric capacity (C06) in parallel between base stage with emitter, the emitter series resistance (RE2) of power switch pipe (Q2), an electric capacity (C07) in parallel between base stage with emitter;
Described heater chain electrical connection half-bridge inversion circuit, this heater chain forms primarily of fluorescent lamp, inductance (L2), electric capacity (C5) and the thermistor in parallel with electric capacity (C5).
2. a kind of energy-saving lamp according to claim 1, is characterized in that: described electric source filter circuit is LC-π type filter circuit.
3. a kind of energy-saving lamp according to claim 1, is characterized in that: described current rectifying and wave filtering circuit is bridge rectifier filter circuit.
4. a kind of energy-saving lamp according to claim 1, it is characterized in that: described passive PFC circuit forms primarily of diode (DO1), diode (D02), diode (D03), electric capacity (C03) and electric capacity (C04), wherein
Diode (DO1), diode (D02) and diode (D03) are connected mutually;
Electric capacity (C03) and diode (DO1) and diode (D02) parallel with one another;
Electric capacity (C04) and diode (D02) and diode (D03) parallel with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114290.1A CN105554993A (en) | 2016-03-01 | 2016-03-01 | Energy saving lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114290.1A CN105554993A (en) | 2016-03-01 | 2016-03-01 | Energy saving lamp |
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| Publication Number | Publication Date |
|---|---|
| CN105554993A true CN105554993A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610114290.1A Pending CN105554993A (en) | 2016-03-01 | 2016-03-01 | Energy saving lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709928A (en) * | 2021-08-27 | 2021-11-26 | 江西汇荣实业有限公司 | Stable purple light function lamp gives out light |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1386040A (en) * | 2001-05-16 | 2002-12-18 | 邓树兴 | Low-harmonic compact type energy-saving lamp electronic ballast |
| CN2879591Y (en) * | 2006-01-06 | 2007-03-14 | 张世炎 | Electronic ballasts |
| CN205454203U (en) * | 2016-03-01 | 2016-08-10 | 广西理工职业技术学院 | Energy -saving lamp |
-
2016
- 2016-03-01 CN CN201610114290.1A patent/CN105554993A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1386040A (en) * | 2001-05-16 | 2002-12-18 | 邓树兴 | Low-harmonic compact type energy-saving lamp electronic ballast |
| CN2879591Y (en) * | 2006-01-06 | 2007-03-14 | 张世炎 | Electronic ballasts |
| CN205454203U (en) * | 2016-03-01 | 2016-08-10 | 广西理工职业技术学院 | Energy -saving lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709928A (en) * | 2021-08-27 | 2021-11-26 | 江西汇荣实业有限公司 | Stable purple light function lamp gives out light |
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Application publication date: 20160504 |
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