CN203537645U - Induction type HID electronic trigger circuit and HID light fixture - Google Patents

Abstract

The utility model relates to an electronic circuit, especially relates to an HID electronic trigger circuit, which is a high frequency induction type HID electronic trigger circuit. The induction type HID electronic trigger circuit comprises a boosting transformer T1, a low pass ballast inductor L1, a high pass capacitor C03, an induction capacitor C3, a full-wave bridge rectifier circuit constituted by four diodes, and a high frequency switch circuit. The HID light fixture comprises an HID lamp tube, an HID electronic ballast main power supply, and the above mentioned induction type HID electronic trigger circuit. The HID lamp tube is connected with a second end of the low pass ballast inductor L1 and a second end of the high pass capacitor C03. The induction type HID electronic trigger circuit and the HID light fixture are used for the electronic trigger of the HID lamp.

Description

Induction type HID electronics circuits for triggering and HID light fixture

Technical field

The utility model relates to electronic circuit, relates in particular to HID electronics circuits for triggering, is a kind of high-frequency induction formula HID electronics circuits for triggering.

Background technology

HID lamp (high-intensity gas discharge lamp mainly refers to ceramic gold-halogen lamp here) is the electric light source of a kind of high light efficiency, high color rendering index (CRI), particularly aspect color rendering index, is better than LED lamp.But HID start-up course is complicated, needs configure trigger circuit to light.And the performance of circuits for triggering directly affects HID job stability and useful life, therefore, the performance of circuits for triggering quality is most important concerning HID lamp.The electronics circuits for triggering of comparative maturity mainly contain following two large classes now:

One class is: LC series resonance boost type.Sort circuit simple in structure, start comparatively stable, but because of operating frequency lower (50-400Hz), need larger electric capacity and inductance, therefore, component size is large, triggering power is large, electric energy loss is large, and trigger voltage is wanted about 4000 volts, lamp is impacted greatly, larger on the impact in useful life of HID.If in the time of will protecting control to thermolamp, bad lamp and resonance potential, its circuit is also comparatively complicated.

Another kind of: the boost type that inductance tap is carried out to heavy current electric discharge.Mainly contain: the single-stage boost type that directly tap is discharged to inductance and the first Simple electronic secondary boost type that tap is discharged to inductance again that boosts.Arresting element can be lightning protection discharge tube, atmospherical discharges electrode, semiconductor discharge tube etc.It is by inductance tap is carried out to heavy current electric discharge, and then makes whole inductance obtain high pressure.After triggering successfully, this boost inductance doubles as the ballast inductance of main power source and uses.So the volume ratio of this inductance is larger, a kind of HID electronic trigger as disclosed in the patent of publication number CN101309540A just belongs to the first Simple electronic secondary boost type that discharge tube boosts to inductance tap electric discharge that boosts again.Sort circuit structure is also simpler, triggers power also lower, major defect: the one, and the puncture voltage of discharge tube is unstable, causes exporting to the trigger voltage of HID and trigger power unstable, needs very large surplus; The 2nd, the useful life of discharge tube is short, causes the quality of whole power supply to decline; The 3rd, the repetition rate of discharge tube is low, and is DC pulse, requires trigger voltage 5000-9000 volt left and right, and this withstand voltage raising to transformer high requirement; The 4th, boost inductance doubles as the ballast inductance of main power source, requires the wire diameter of winding thick, and inductance volume is large; The 5th, because trigger voltage is too high, during thermolamp start, cause sometimes the wick external discharge of HID, have a strong impact on the useful life of HID.In addition, as circuits for triggering such as patents " CN101309540A ", triggering signal is direct current, and operating current all exchanges with HID lamp, because of monolateral triggering, easily produces the asymmetric of HID two ends lamp pressure, causes HID early ageing phenomenon.Trigger voltage is higher, triggers power larger, also larger on the life-span impact of HID fluorescent tube.Common circuits for triggering, common every triggering once, can be shortened about the 6 hours useful life of fluorescent tube.

Utility model content

In order to improve HID useful life, improve stability and reliability that HID triggers.Therefore, the utility model proposes a kind of induction type HID electronics circuits for triggering and apply the HID lamp of these electronics circuits for triggering.

The utility model proposes a kind of induction type HID electronics circuits for triggering, comprise: a step-up transformer T1, a low pass ballast inductance L1, a high pass capacitor C 03, an inductance capacitance C3, a full-wave bridge rectifier circuit being formed by 4 diodes and a high-frequency switch circuit, the first end of the primary coil of this step-up transformer T1 is connected in first input of full-wave bridge rectifier circuit, the second end of the primary coil of this step-up transformer T1 is connected in the first end of high pass capacitor C 03, the second end of this high pass capacitor C 03 is connected in second input of full-wave bridge rectifier circuit, the first end of this high pass capacitor C 03 is connected in the first end of low pass ballast inductance L1, the second end of this low pass ballast inductance L1 is connected in the first end of inductance capacitance C3, the second end of this inductance capacitance C3 is connected in the first end of the secondary coil of this step-up transformer T1, the second end of the secondary coil of this step-up transformer T1 is connected in the first end of its primary coil, two outputs of this full-wave bridge rectifier circuit are connected with the two ends of the HF switch passage of this high-frequency switch circuit, the first end of this high pass capacitor C 03 and the second end are used for being connected in a low-frequency ac square wave circuit for generating, the second end of this low pass ballast inductance L1 and the second end of this high pass capacitor C 03 are used for being connected a HID lamp.

Further improved, this high-frequency switch circuit comprises a HF switch pipe, a high-frequency circuit and a Drive and Control Circuit, this high-frequency circuit produces the control end that high-frequency resonant AC signal is passed to HF switch pipe, thereby the switch passage of this HF switch pipe is opened or is closed on high-frequency ground, and by the opening and closing of this Drive and Control Circuit, whether the transmission of this high-frequency circuit is controlled.

Further improved, this high-frequency circuit is RCD resonant circuit.

Further improved again, this high-frequency switch circuit also comprises a voltage stabilizing didoe, the input of this voltage stabilizing didoe Opposite direction connection trigger switch pipe in the output of this full-wave bridge rectifier circuit and this high-frequency circuit, this voltage stabilizing didoe is sampled to the voltage of this full-wave bridge rectifier circuit output, and forms voltage comparator circuit with this trigger switch pipe.

Further improved, this HF switch pipe also feeds back by a triode, carries out power and automatically adjusts.

Further improved, between this high-frequency circuit and HF switch pipe, also side meets an absorption inductor L2.

Further improved, this HF switch pipe is a metal-oxide-semiconductor.

Further improved, the high-frequency resonant AC signal transmission whether cycle that this high-frequency circuit of this drive control circuit produces is: 2-3 controls conducting second, and 30-60 controls and close second.

Further improved, the diode D4 that the primary coil of this step-up transformer T1 connects respectively a forward connection from centre tap is to positive source, and the diode D5 that connects an Opposite direction connection is to power cathode, the capacitor C 01 and the C02 that between positive source and negative pole, connect two serial connections, the intermediate ends of this capacitor C 01 and capacitor C 02 is connected in the second end of this high pass capacitor C 03.

The utility model also proposes a kind of HID light fixture, comprise: a HID fluorescent tube, a HID electric ballast main power source and induction type HID electronics circuits for triggering as described above, this HID fluorescent tube is connected in the second end of this low pass ballast inductance L1 and the second end of this high pass capacitor C 03.

The utility model adopts as above technical scheme, can greatly improve stability and reliability that HID triggers, thereby extends the useful life of HID fluorescent tube.

Accompanying drawing explanation

Fig. 1 is the circuit theory diagrams of the utility model most preferred embodiment.

Fig. 2 is the oscillogram of V1 end and the low-frequency ac square-wave signal that V2 end applies of this embodiment.

Fig. 3 is the oscillogram of the high frequency ac signal that produces of the primary coil two ends of the step-up transformer T1 of this embodiment.

Fig. 4 is the oscillogram of the guard signal that applies of the input Vk of this embodiment.

Embodiment

In order to improve HID useful life, improve stability and reliability that HID triggers.It is the most effective mode that circuits for triggering adopt interruption, symmetry, high frequency, lower powered pattern." interruption " refers to trigger voltage output 2-3 second, turn-offs 30-60 second, and circulation is interrupted output.The successful triggered time of most HID is less than 1 second, is interrupted mode of operation and both can guarantees normal startup, energy-conservation and protect HID fluorescent tube and power supply in the time of again can be at HID thermolamp, bad lamp, without lamp; The benefit of " high frequency " is: can make the trigger voltage of HID lamp drop to 1500V left and right, and also reduction greatly of starting power, induction type is started becomes possibility; " symmetry " refers to that trigger voltage also changes with the polar-symmetric of main power source, the startup of HID fluorescent tube is more prone to, and prevents HID fluorescent tube early ageing (asymmetric damage), extends HID lamp tube service life.

Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.

The circuit of the utility model most preferred embodiment, comprise: trigger driving voltage output 2-3 second, turn-off the automatic halt circuit of trigger voltage after the 30-60 control impuls of second (being the guard signal of Vk end input), the low-frequency ac square wave of V1V2 end input, the high-frequency switch circuit part of the about 10KHz of trigger rate (this " high frequency " is that the optimum frequency with respect to main power source is for 200-400Hz), lighting circuit part (being realized by booster circuit, inductive output circuit) and the startup of HID fluorescent tube; In addition also have when the triggering energy recovery circuit for electric of HID fluorescent tube appearance during without the problem (i.e. " zero load ") of lamp, thermolamp, bad lamp.

The physical circuit of this embodiment that Fig. 1 discloses forms: the tapped former limit that has of step-up transformer T1 comprises the second coil N12 of Same Name of Ends and centre tap formation and the first coil N11 of centre tap and end formation, and the secondary of step-up transformer T1 is tertiary coil N21.Wherein after backward diode D4 of positive source Vcc series connection and this first coil N11 to this circuits for triggering input V2, after a backward diode D5 of centre tap end Vz series connection to power cathode V0, a capacitor C 3 of Same Name of Ends serial connection of tertiary coil N21, after a low pass ballast inductance L1, be connected to this circuits for triggering input V2, after a capacitor C 03 of circuits for triggering input V2 serial connection to another input V1 of these circuits for triggering, the capacitor C 3 of serial connection and the intermediate ends of low pass ballast inductance L1 are V3, between V1 end and V3 end for connecting HID lamp, positive source Vcc and power cathode V0 serial connection capacitor C 01 and capacitor C 02, the intermediate ends of capacitor C 01 and capacitor C 02 is connected with V1 end, the end of the tertiary coil N21 of step-up transformer T1 and the input V1 of circuits for triggering are connected to one by diode D01, D02, D03, the bridge rectifier that D04 forms, the output of this bridge rectifier just, negative pole Va, between Vb, be connected in series a switch MOS pipe Q1 and resistance R 6, the anodal Va of bridge rectifier is connected in the drain D of switch MOS pipe Q1, the source S of switch MOS pipe Q1 is connected in one end of resistance R 6, the other end of resistance R 6 is connected in the negative pole Vb of bridge rectifier, the drain D of this switch MOS pipe Q1 is connected in source S by capacitor C 2 and the resistance R 7 of series connection, the output of bridge rectifier just, negative pole Va, between Vb, be also connected in series the voltage stabilizing didoe D1 of an Opposite direction connection, the voltage stabilizing didoe D2 of an electronics R1 and an Opposite direction connection, a two ends resistance R 2 in parallel of voltage stabilizing didoe D2, after a resistance R 3 and capacitor C 1 serial connection, be parallel to this resistance R 2 two ends, after a resistance R 4 of intermediate ends series connection of this resistance R 3 and capacitor C 1 and a diac D3 to the grid G of switch MOS pipe Q1, between the intermediate ends Vc of this resistance R 4 and diac D3 and the negative pole Vb of bridge rectifier, access a triode Q3, the collector electrode c that is triode Q3 connects Vc end, emitter e connects Vb end, the base stage b of triode Q3 is the input Vk of guard signal, between the grid G of this switch MOS pipe Q1 and the negative pole Vb of this bridge rectifier, the collector electrode c of an inductance L 2 in parallel and a triode Q2(triode Q2 is connected to the grid G of switch MOS pipe Q1 respectively, emitter e is connected to the negative pole Vb of bridge rectifier), between the source S of the base stage b of this triode Q2 and this switch MOS pipe Q1, connect a resistance R 5.

Below the operation principle of the circuit of above-mentioned most preferred embodiment is elaborated.

Again consult shown in Fig. 1, the circuits for triggering of this embodiment mainly comprise the lighting circuit part (hereinafter to be referred as " lighting part ") on dotted line the right and the high-frequency switch circuit part (hereinafter to be referred as " HF switch part ") on the dotted line left side.First the part of lighting on dotted line the right is described.Supposing the action that the HF switch part on the dotted line left side can produce a HF switch, is with high-frequency ground turn-on and turn-off switch MOS pipe Q1, the passage of electric current just can high-frequency interruption like this flow through switch MOS pipe Q1 and resistance R 6; HID lamp is before lighting, during switch MOS pipe Q1 conducting, the loop that the rectifier bridge that V1, V2 end input low-frequency ac square wave (V1, V2 are also the outputs of HID electric ballast main power source) just can consist of primary coil (the first coil N11 and the second coil N12) and diode D01, D02, D03, the D04 of step-up transformer T1 forms.

Concrete, for example, when V2 end is negative for positive V1 end, current direction is: the primary coil (the first coil N11 and the second coil N12) of V2 end, step-up transformer T1, diode D04, switch MOS pipe Q1, resistance R 6, diode D02, V1 end; When V1 end is negative for positive V2 end, current direction is: the primary coil of V1 end, diode D01, switch MOS pipe Q1, resistance R 6, diode D03, step-up transformer T1 (the second coil N12 and the first coil N11), V2 end.As can be seen here, as long as high frequency fast conducting and stopcock metal-oxide-semiconductor Q1, at the primary coil (the first coil N11 and the second coil N12) of step-up transformer T1, can produce a high frequency ac signal.Consulting shown in Fig. 2, is the low-frequency ac square-wave signal that V1 end and V2 end apply.Consult shown in Fig. 3, after the high frequency turn-on and turn-off of switch MOS pipe Q1, will produce high frequency ac signal at primary coil (the first coil N11 and the second coil N12) two ends of step-up transformer T1.Through the magnetic flux coupling of step-up transformer T1, the secondary coil of step-up transformer T1 (tertiary coil N21) two ends will produce required high-frequency and high-voltage by turn ratio.Step-up transformer T1 is an autotransformer, so total high-frequency and high-voltage of the first coil N11, the second coil N12, tertiary coil N21 is total trigger voltage of the present embodiment.Due to the straight-through characteristic of high frequency of capacitor C 3, capacitor C 03, and the high frequency of low pass ballast inductance L1 blocking-up (high impedance) characteristic, this high frequency ac signal can be applied on this HID lamp, thereby this HID lamp is lighted.

The capacitor C 3 here can be called as inductance capacitance, because after it exchanges high-frequency and high-voltage trigger impulse (trigger voltage) and respond to successfully, because of its capacitance very little, low-frequency ac square wave to the main power source of V1, V2 end input is substantially obstructed, thereby cut off main power source and triggered interfering with each other of power supply, step-up transformer T1 also disconnects (this is one of advantage of the present utility model, can make the volume of step-up transformer T1 greatly dwindle) immediately.Because the capacity of capacitor C 3 is very little, the volume of step-up transformer T1 is also very little, capacitor C 3 just looks like just the electric energy of high-frequency and high-voltage have been responded to a bit in the past, thus claim this electric capacity to can be inductance capacitance here, and claim that this HID electronics circuits for triggering are induction type HID electronics circuits for triggering.

The low pass ballast inductance L1 here prevents that trigger voltage is by short circuit, and guarantee to connect main power source low-frequency ac square wave can without the time interval after triggering successfully, immediately the low-frequency ac square wave of main power source is applied to HID fluorescent tube.Meanwhile, prevent that the electric energy of capacitor C 03 from, to the impulsive discharge of HID fluorescent tube, playing ballast effect.

The capacitor C 03 is here that the High frequency filter of main power source and storage capacitor are (although the output frequency of main power source only has 300Hz left and right, but the operating switch frequency of its automatic constant-power adjustment is 70KHz left and right, so the high frequency of 03 couple of 70KHz of capacitor C has very strong filtering and energy storage effect, and very little on low frequency 300Hz impact), be again the coupling capacitance of the trigger voltage of high-frequency and high-voltage.

Visible by foregoing circuit principle, here V1, V2 end input low-frequency ac square wave, due to step-up transformer, T1 is located at D01, D02, D03, before the bridge rectifier of D04 rectifier bridge, although switch MOS pipe Q1 is direct current, but the N11 of step-up transformer T1, the input polarity of N12 is with V1, the change in polarity of V2 end changes, although at V1, in the half cycle of V2, the pulse of high-frequency and high-voltage is asymmetric, but, in another half cycle, high-frequency and high-voltage has changed direction, so with regard to V1, a complete cycle or a plurality of complete cycle of V2, trigger voltage is symmetrical, Here it is, and why step-up transformer T1 is located at D01, D02, D03, the main cause of D04 rectifier bridge outside.This is because asymmetric trigger impulse has larger impact to the life-span of HID all the time.Thereby the unique design position of step-up transformer T1, realized the symmetry of high frequency ac signal pulse positive-negative polarity, the simplicity of trigger voltage induction output.And the output of step-up transformer T1 is without isolation (as the inductance with tap), and volume is little, effective.

It should be noted that, the bridge rectifier that this diode D01, D02, D03, D04 form is except above-mentioned providing the function of path to step-up transformer T1 of mentioning, also the HF switch for the dotted line left side partly provides DC supply, and for circuits for triggering, realizes automatic hold function sampling voltage is provided.This is special improvements of the present utility model just also.

In addition; two passages of drawing flow through respectively diode D4, D5 from the centre tap end Vz of the primary coil of step-up transformer T1; be for by V1 end and V3 end, occur thermolamp start (lamp is reopening immediately after extinguishing after lighting), bad lamp, without protecting in lamp situation; electric energy is reclaimed; capacitor C 01, C02 carry out energy storage, thereby have realized triggering electric energy recovery function.Therefore,, when diode D4, D5 can be for output no-loads, triggering electric energy is recycled to C01, C02.Its benefit has three: one, energy-conservation, greatly energy-conservation when particularly unloaded; The pressure limiting of the 2nd, Q1 negative peak, guarantees the safety of switch MOS pipe Q1; The 3rd, trigger voltage pressure limiting, while preventing that thermolamp from restarting, tube housing is lit, and guarantees fluorescent tube safety.

As can be seen here, the circuit structure implementation of lighting part on the dotted line of the circuit of this embodiment the right is the difference with the HID electronics circuits for triggering structure implementation maximum of prior art.The HF switch part on the dotted line left side is only to provide a high frequency on-off function, can adopt an existing high-frequency switch circuit or integrated circuit (IC) sheet to realize completely, as adopt the switching circuit of high-frequency resonant on the transformer T1 left side of the accompanying drawing 4 of patent publication No. CN101309540A to substitute, be connected to the bridge rectifier power taking of above-mentioned diode D01, D02, D03, D04 formation, or also can adopt other similar high-frequency switch circuits, in this, will not enumerate.

Again consult shown in Fig. 1, below the HF switch on the circuit dotted line left side of this embodiment is partly described.The HF switch part on this dotted line left side, except having realized the function of conventional high-frequency switch circuit, also has trigger protection function (realizing by a Drive and Control Circuit).After the bridge rectifier that this diode D01, D02, D03, D04 form, flow through voltage stabilizing didoe D1 and diac D3, select to go out whether HID lamp starts or the supply voltage of V1, V2 end is too low by automatic decision by the breakdown voltage value of diode D1, D3.For example in this embodiment, the preferred voltage stabilizing value of voltage stabilizing didoe D1 is 91V, and the trigger voltage value of diac D3 is approximately 28-36V.

Voltage stabilizing didoe D1 starts whether successfully sample voltage stabilizing didoe for detection of HID fluorescent tube, when HID fluorescent tube starts successfully, the voltage at V1, V2 two ends will drop to about 80 volts (just having started minimum 15 volts from about 150 volts, normal work 70-90 volt), when the conducting voltage of diode D1+D3 is set as 115 volts of left and right, diac D3 will be not can triggering and conducting, switch MOS pipe Q1 will end always, so, circuit triggerless Voltage-output, and then the self-braking function of trigger voltage after having realized HID fluorescent tube and starting successfully.Resistance R 2 is the electric leakage bleeder resistance of voltage stabilizing didoe D1, guarantees the consistency of circuit.

Preferably, voltage stabilizing didoe D2 changes and establishes in a big way for adapting to the voltage of V1, V2 end, and R1 is its current-limiting resistance.

As can be seen here; the crest voltage of the power supply square wave that V1, V2 end loads surpasses the puncture voltage of diode D1+D3 under normal circumstances what do not put bright light; therefore as long as the characteristic value of pre-set diode D1 and D3; the crest voltage of the power supply square wave loading when V1, V2 end is during lower than the puncture voltage of diode D1+D3; illustrate that HID has started successfully (after starting, crest voltage must decline); or supply voltage too low (should not start); this HF switch part cannot be worked, and has played and has automatically stopped or low-voltage variation effect.

In addition, resistance R 3 and capacitor C 1 are time-base circuit, the resonant energy of resistance R 3 and capacitor C 1 is not to be directly used in high frequency to trigger this switch MOS pipe Q1, but a switch by Drive and Control Circuit is interrupted and opens, be the input Vk of the base stage b(guard signal of triode Q3) output low level Continuity signal momently intermittently, when the voltage of capacitor C 1 is greater than the trigger voltage of diac D3, the electric energy of capacitor C 1 discharges to diac D3 by current-limiting resistance R4, the GS of electric energy moment of capacitor C 1 being put to switch MOS pipe Q1 by diac D3 holds, the GS of switch MOS pipe Q1 hold electric after, the DS end conducting of switch MOS pipe Q1, thereby produce the work of lighting a lamp that partly triggers of lighting that HF switch moves to realize dotted line the right.

Consult shown in Fig. 4; for example preferred; the guard signal of input Vk input can be that (diac D3's 30-60 high level of second does not work; switch MOS pipe Q1 does not work; step-up transformer T1 Triggerless output), (diac D3 exports high-frequency pulse signal to the low level of 2-3 second; switch MOS pipe Q1 work, step-up transformer T1 exports triggering signal).Can realize like this trigger voltage output 2-3 second, close the 30-60 circulation interruption output function of second, the generation method of this guard signal is a lot, exemplifies no longer one by one here.Like this, when the HID lamp dividing when the high frequency points highlights on dotted line the right or other components and parts go wrong, the HF switch part on this dotted line left side can long time continuous working, plays certain protective role.

And inductance L 2, triode Q2, resistance R 5, R6 are the power limited control circuit of switch MOS pipe Q1, to prevent switch MOS pipe Q1 output overpower, guarantee the security reliability of switch MOS pipe Q1.By triode Q2, provide a feedback for limiting triggering power.Inductance L 2 absorbs electric weight, prevents that switch MOS pipe Q1 ON time is long, also plays certain protective effect.Capacitor C 2, resistance R 7 are the negative peak absorbing circuit of switch MOS pipe Q1, prevent that switch MOS pipe Q1 is by negative peak high-voltage breakdown.

In the induction type HID electronics circuits for triggering of above-described embodiment, V1, V2 end is the input of this induction type HID electronics circuits for triggering, the same with other HID circuits for triggering, be connected in the permanent power ac square wave output (HID electronic ballast output end) of a 200-400Hz, as the main power source of HID lamp work.Before HID lamp starts, the peak-to-peak value voltage of the square wave of this V1, V2 end input equals power Vcc voltage, and crest voltage is 1/2 power Vcc voltage.After HID starts, the pressure drop of V2, V3 end is very little, and the voltage between V2, V1 end approximates modulating voltage (<100V).T1 is the step-up transformer of trigger voltage, adopts miniature transformer EE13 to realize just passable, saves hardware cost.C3 is high-frequency and high-voltage output and low-frequency square-wave isolation capacitance.L1 is high-frequency and high-voltage isolation and low-frequency square-wave output low pass ballast inductance, with common I1216 work type inductance.One end of high frequency voltage is that the other end is to hold from bridge rectifier to V1 from capacitor C 3 to V3 ends.V1, HID lamp of V3 termination.

In the induction type HID electronics circuits for triggering of above-described embodiment, the effect of the bridge rectifier that this diode D01, D02, D03, D04 form is: one, that this square wave is carried out to voltage commutation, when the crest voltage of square wave is during lower than the puncture voltage of voltage stabilizing didoe D1+ diac D3, illustrate that HID lamp has started successfully, or supply voltage is too low, should not start, start-up circuit quits work; Two, be that after rectification, the drive and protection to start-up circuit provides electric energy, be the switch of switch MOS pipe Q1, generate driving pulse and protection level; Three, be switch MOS pipe Q1 while opening, path is provided to step-up transformer T1.One of unusual point of this circuit maximum is (being AC) before transformer is placed on rectifier bridge, rather than conventionally adopt after rectifier bridge, i.e. DC side.

In the induction type HID electronics circuits for triggering of above-described embodiment, this step-up transformer T1 is placed on the maximum benefit of AC: one, and be to have simplified to light the circuit of part and being connected of main power source output circuit; Two, be thermolamp, during without lamp, bad lamp, the electric energy of startup just can be transmitted back to the electric energy triggering in storage capacitor C01, C02 by two diodes, has not only saved electric energy but also protected circuits for triggering, has particularly protected switch MOS pipe Q1.Three, the polarity that is the trigger voltage of high-frequency and high-voltage is that the polarity with the ac square wave of main power source becomes, rather than DC pulse continuously, thereby more with being beneficial to the startup of HID lamp, and prevent the asymmetric damage (early ageing) of HID fluorescent tube, can extend the useful life of HID lamp.

In the induction type HID electronics circuits for triggering of above-described embodiment, D3 is DB3 diac, and it puts electric energy moment of capacitor C 1 to switch MOS pipe Q1, produces driving pulse.Resistance R 3, capacitor C 1 have determined the high-frequency impulse frequency (preferred value is 10KHz left and right) of this switch MOS pipe Q1, and this resistance R 3, capacitor C 1, diode DB3 form a RCD oscillation drive circuit.Triode Q2 limits triggering power, and its value is determined by sample resistance R6.

In the induction type HID electronics circuits for triggering of above-described embodiment, the guard signal of input is from base stage (input Vk) input of triode Q3.When Vk end input high level, triode Q3 conducting, diac D3 quits work, so also shutdown switch action of switch MOS pipe Q1, the trigger point brightening circuit on dotted line the right stops High voltage output; Preferably, the dwell time in general every interruption cycle is that 30-60 is comparatively suitable second.When Vk end input low level, triode Q3 cut-off, diac D3 resumes work, for switch MOS pipe, Q1 provides switching drive signal, so switch MOS pipe Q1 recovers switch motion, the trigger point brightening circuit on dotted line the right just produces high-frequency and high-voltage electric energy, conventionally in 1 second, can allow HID lamp normally start, so the output time of the trigger voltage in preferred every interruption cycle is 2-3 second.The producing method of the guard signal of this batch (-type) low level conducting of this Vk end input is a lot, the realizations such as the circuit that can form by discrete component or special integrated circuit (IC), and this part is not this patent emphasis, in this, launches no longer in detail explanation yet.

Induction type HID electronics circuits for triggering of the present utility model are due to its operating frequency higher (10KHz), trigger voltage 1500V just can make HID fluorescent tube start smoothly, therefore, set 2000V and just have enough surpluses, and trigger power as long as 1/5 left and right of normal power, very steady during startup, the quality requirement of HID lamp is also decreased, particularly the life-span of low-quality HID lamp is had a distinct increment.If hold additional high level 30-60 second at Vk, the protection control signal of low level 2-3 second, only works 2-3 second the every 32-63 of circuits for triggering second; not only power supply standby for a long time; and to the startup of HID lamp safety and stability more, can, when lamp is not suitable for starting, not start by force continuously.This can play a very good protection extremely to HID lamp thermolamp, lamp, the HID lamp of 70W, and the average power of heat engine standby is 1W left and right only.

The utility model also proposes a kind of HID light fixture, this HID light fixture comprises a HID fluorescent tube, a HID electric ballast main power source and induction type HID electronics circuits for triggering as above, and this HID fluorescent tube is connected in the second end of this low pass ballast inductance L1 and the second end of this high pass capacitor C 03.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; but those skilled in the art should be understood that; within not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.

Claims (10)

1. induction type HID electronics circuits for triggering, it is characterized in that, comprise: a step-up transformer T1, a low pass ballast inductance L1, a high pass capacitor C 03, an inductance capacitance C3, a full-wave bridge rectifier circuit being formed by 4 diodes and a high-frequency switch circuit, the first end of the primary coil of this step-up transformer T1 is connected in first input of full-wave bridge rectifier circuit, the second end of the primary coil of this step-up transformer T1 is connected in the first end of high pass capacitor C 03, the second end of this high pass capacitor C 03 is connected in second input of full-wave bridge rectifier circuit, the first end of this high pass capacitor C 03 is connected in the first end of low pass ballast inductance L1, the second end of this low pass ballast inductance L1 is connected in the first end of inductance capacitance C3, the second end of this inductance capacitance C3 is connected in the first end of the secondary coil of this step-up transformer T1, the second end of the secondary coil of this step-up transformer T1 is connected in the first end of its primary coil, two outputs of this full-wave bridge rectifier circuit are connected with the two ends of the HF switch passage of this high-frequency switch circuit, the first end of this high pass capacitor C 03 and the second end are used for being connected in a low-frequency ac square wave circuit for generating, the second end of this low pass ballast inductance L1 and the second end of this high pass capacitor C 03 are used for being connected a HID lamp.

2. induction type HID electronics circuits for triggering according to claim 1, it is characterized in that: this high-frequency switch circuit comprises a HF switch pipe, a high-frequency circuit and a Drive and Control Circuit, this high-frequency circuit produces the control end that high-frequency resonant AC signal is passed to HF switch pipe, thereby the switch passage of this HF switch pipe is opened or is closed on high-frequency ground, and by the opening and closing of this Drive and Control Circuit, whether the transmission of this high-frequency circuit is controlled.

3. induction type HID electronics circuits for triggering according to claim 2, is characterized in that: this high-frequency circuit is RCD resonant circuit.

4. induction type HID electronics circuits for triggering according to claim 3, it is characterized in that: this high-frequency switch circuit also comprises a voltage stabilizing didoe, the input of this voltage stabilizing didoe Opposite direction connection trigger switch pipe in the output of this full-wave bridge rectifier circuit and this high-frequency circuit, this voltage stabilizing didoe is sampled to the voltage of this full-wave bridge rectifier circuit output, and forms voltage comparator circuit with this trigger switch pipe.

5. according to the induction type HID electronics circuits for triggering described in claim 2 or 3 or 4, it is characterized in that: this HF switch pipe also feeds back by a triode, carry out power and automatically adjust.

6. according to the induction type HID electronics circuits for triggering described in claim 2 or 3 or 4, it is characterized in that: between this high-frequency circuit and HF switch pipe, also side meets an absorption inductor L2.

7. according to the induction type HID electronics circuits for triggering described in claim 2 or 3 or 4, it is characterized in that: this HF switch pipe is a metal-oxide-semiconductor.

8. according to the induction type HID electronics circuits for triggering described in claim 2 or 3 or 4, it is characterized in that: the high-frequency resonant AC signal transmission whether cycle that this high-frequency circuit of this drive control circuit produces is: 2-3 controls conducting second, 30-60 controls and close second.

9. according to the induction type HID electronics circuits for triggering described in claim 1 or 2 or 3 or 4, it is characterized in that: the diode D4 that the primary coil of this step-up transformer T1 connects respectively a forward connection from centre tap is to positive source, and the diode D5 that connects an Opposite direction connection is to power cathode, the capacitor C 01 and the C02 that between positive source and negative pole, connect two serial connections, the intermediate ends of this capacitor C 01 and capacitor C 02 is connected in the second end of this high pass capacitor C 03.

10.HID light fixture, it is characterized in that, comprise: HID fluorescent tube, HID electric ballast main power source and the induction type HID electronics circuits for triggering as described in as arbitrary in the claims 1-9, this HID fluorescent tube is connected in the second end of this low pass ballast inductance L1 and the second end of this high pass capacitor C 03.

Images