EP0847681B1 - Zündschaltung für eine hochdruck-gasentladungslampe - Google Patents

Zündschaltung für eine hochdruck-gasentladungslampe Download PDF

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Publication number
EP0847681B1
EP0847681B1 EP96927655A EP96927655A EP0847681B1 EP 0847681 B1 EP0847681 B1 EP 0847681B1 EP 96927655 A EP96927655 A EP 96927655A EP 96927655 A EP96927655 A EP 96927655A EP 0847681 B1 EP0847681 B1 EP 0847681B1
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EP
European Patent Office
Prior art keywords
ignition
lamp
controllable switch
circuit according
pulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96927655A
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German (de)
English (en)
French (fr)
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EP0847681A1 (de
Inventor
Kai Arbinger
Roman Ploner
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Tridonic Bauelemente GmbH
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Tridonic Bauelemente GmbH
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Publication of EP0847681A1 publication Critical patent/EP0847681A1/de
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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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices

Definitions

  • the invention relates to an ignition circuit for a high-pressure gas discharge lamp according to the preamble of claim 1.
  • Such an ignition circuit is for example from DE 31 08 547 C2 and DE 31 08 548 C2 known.
  • a high pressure gas discharge lamp or high-pressure metal vapor discharge lamp 4 (hereinafter also referred to as a lamp) is at the output terminals 2 and 2 of the ignition circuit connected.
  • the ignition circuit has a pulse transformer 5, the Secondary winding 6 in the live supply line between the Lamp 4 and a conventional magnetic ballast 3, e.g. a choke, is switched.
  • the series connection from the secondary winding 6 of the Pulse transformer 5 of the lamp 4 is a series connection of one Impulse capacitor 7 and an auxiliary ignition capacitor 11 connected in parallel
  • the Impact capacitor 7 is a series circuit from the primary winding 8 of the Pulse transformer 5 and a symmetrically switching switching element 9 in parallel is switched.
  • the symmetrically switching switching element 9 can be, for example Four-layer diode, a triac or a sidac. Likewise, the use of a Gas spark gap conceivable. 10 is an example of the symmetrical switching Switching element 9 shown as Sidac.
  • the auxiliary ignition capacitor 11 is a Charging resistor 13 connected in parallel.
  • the surge capacitor 7 is connected in parallel with the auxiliary ignition capacitor 11 and the charging resistor 13 charged until its voltage is the switching voltage of the Sidac exceeds 9, so that the Sidac breaks through and becomes low-resistance. With Breaking through the Sidac, the surge capacitor 7 via the primary winding 8 of the Pulse transformer 5 short-circuited and discharged through the primary winding 8. The voltage drop in the primary winding 8 is in the ratio of the number of turns Pulse transformer 5 transformed up so that an ignition pulse of about 4 KV at the Lamp 4 is caused. Even while the Sidac 9 is turned on the series resonance circuit consisting of the choke 3 and the auxiliary ignition capacitor 11 excited at its natural frequency (approx.
  • the Sidac 9 blocks with polarity reversal of the current and interrupts the Circuit for the consisting of the throttle 3 and auxiliary ignition capacitor 11 Series resonance circuit. Meanwhile, the surge capacitor 7 reaches in the course of Vibration again the switching voltage of the Sidac 9 and switches it through again. This process is repeated in the course of a network half-wave. Because of the close consequence The ignition impulses when the supply voltage is excessive also make the ignition difficult lit lighting lamps.
  • the ignition circuit must be in accordance with the regulations of the lamp manufacturer be designed that at least three ignition pulses per network half-wave with one maximum pulse interval of 0.3 ms can be generated. Furthermore, the circuit is to be dimensioned such that the phase angle of the Ignition pulses between 60 ° el and 90 ° el of the positive or negative network half-wave is guaranteed.
  • EP 0 381 083 A1 and EP 0 314 178 A1 of the applicant also describe similar ones Ignition circuits for high pressure gas discharge lamps.
  • the ignition of lamps with less Power for example 35 W
  • the prescribed Ignition pulse spacing is not kept or only with difficulty. This has its cause is that for lower lamp powers a higher impedance for the choke 3 is prescribed because the increased impedance of the choke 3 in Connection with the surge capacitor 7 and the auxiliary ignition capacitor 11 a causes lower series resonance frequency, so that the distance between the Ignition pulses are increased.
  • DE-A1-43 33 884 describes an ignition circuit according to the preamble of claim 1 known.
  • a bipolar transistor is used as a controllable switch proposed which in series with the parallel connection from the surge capacitor on the one hand and the primary winding of the transformer and a switching spark gap as Switching element on the other hand is switched.
  • the bipolar transistor forms a connection with other components a constant current source, in order to after an extinction High-pressure gas discharge lamp to re-ignite the lamp as quickly as possible achieve, because the charging voltage of the surge capacitor is linear across the constant current source increases with time.
  • EP-A1-0 613 326 describes a further ignition circuit for a high-pressure gas discharge lamp known, with a Sidac acting as a switching element parallel to a series connection of part of a secondary winding of a transformer and a surge capacitor is connected.
  • a controllable Switches connected in series. This controllable switch remains when the Mains voltage switched on until a timer circuit expires a certain one Time span. After this period, the controllable switch opened to further ignitions of the lamp with the help of the Sidac and the Avoid surge capacitor comprehensive ignition circuit.
  • the timer circuit will reset when the partial mains voltage supplied to it falls below a predetermined value Minimum value has dropped at which the lamp goes out, so that in this case the controllable switch is switched on again and the switching is activated again.
  • the invention is therefore based on the object described above To avoid disadvantages and in particular to specify an ignition circuit that the Generation of a sufficiently high performance guaranteed.
  • the ignition circuit according to the invention has a controllable switching element, which in Series with the parallel circuit from the surge capacitor on the one hand and the Primary winding of the pulse transformer and the switching element on the other hand is switched.
  • the free time of the Switching element which, for example, a four-layer diode, a triac, a Sidac, is a gas spark gap or a transistor controlled in a rectifier bridge, be significantly reduced.
  • the controllable switch can be designed as a single-pole switch, the immediate after breakdown of the switching element in the ignition circuit for a predetermined time switched off, i.e. is opened so that the current in the from the surge capacitor, the switching element and the primary winding of the pulse transformer Can oscillate safely and quickly.
  • the controlled Switch as a two-pole switch, i.e. be designed as a switch, in which a position the parallel circuit of surge capacitor, primary winding and Switching element is known to be connected to the AC voltage source and after the breakthrough of the switching element in the second position, the parallel connection is short-circuited and / or separated from the AC voltage source by the To discharge surge capacitor accelerated in time. It is therefore guaranteed that the controllable switch can lock quickly and reliably, what short Ignition pulse intervals enabled.
  • the function of the ignition circuit according to the invention is as follows:
  • the controllable switch is initially in the state which separates the parallel circuit comprising the surge capacitor, primary winding and switching element from the AC voltage source. In the case of a single pole switch, this means that the switch is open. If the AC voltage supplied by the AC voltage source is in the required phase range 60 ° el - 90 ° el of the positive or negative network half-wave, which increases in amount, i.e.
  • the controllable switch is switched to a second state in which the aforementioned parallel connection is connected to the AC voltage source, so that the surge capacitor of the parallel circuit can be charged by the energy supplied by the AC voltage source.
  • the controllable switch is switched back to the original first state, and preferably as long as the switching element requires time, for example 80 ⁇ s . After this predetermined time interval has elapsed, the switch is switched back to the second state, so that a new ignition pulse can be generated.
  • a short-circuit fuse for example a PTC resistor, can be used with the charging capacitor be connected in series to prevent thermal overloading of the Avoid ignition circuit in the event of a short circuit in each switching element.
  • a control circuit is preferably used to control the controllable switch used in particular as a customer-specific integrated circuit, i.e. as so-called ASIC can be formed.
  • the controllable switch can the ASIC contain a counter.
  • the controllable switch can detect a Ignition pulse that ASIC have an ignition pulse detection device.
  • the controllable switch the for example a bipolar transistor, a field effect transistor or a simple relay can be permanent in the first or second state, in the case of a single pole Switch can be permanently opened or closed.
  • FIG. 1a shows a first embodiment of the ignition circuit according to the invention.
  • the ignition circuit shown in FIG Ignition circuit serving as a magnetic ballast throttle 3 one Pulse transformer 5, the secondary winding 6 in series with the choke 3 and the High-pressure gas discharge lamp 4 is switched, and its primary winding 8 in series is connected to a switching element 9, and a shock capacitor 7, the Impact capacitor 7 on the one hand and the series connection from the primary winding 8 and the switching element 9 on the other hand form a parallel connection, which in turn in series is connected with a charging resistor 13 and a controllable switch 10. Also if in Fig.
  • the symmetrically switching switching element 9 as Sidac which above a certain positive switching voltage and below a certain one breaks through the negative switching voltage and has a high resistance in the area in between is shown, it can be seen that others are also controlled accordingly Switching elements, such as a gas spark gap, a four-layer diode controlled triac or a transistor controlled in a rectifier bridge, can be used.
  • the controllable switch 10 is preferably one in one Rectifier bridge driven bipolar transistor or field effect transistor. Of there is also an auxiliary ignition capacitor 11 and a control circuit 12 which serves to control the controllable switch 10.
  • the control circuit 12 controls the controllable switch 10 depending on the occurrence of an ignition pulse for the High-pressure gas discharge lamp 4, wherein an ignition pulse by a corresponding existing ignition pulse detection 15 is detected, which with the Pulse transformer 5 is connected by a special winding 14.
  • An ignition pulse can also be derived elsewhere in the circuit.
  • Fig. 1b shows a detailed view of that shown in Fig. 1a as a schematic diagram ignition circuit according to the invention.
  • the controllable Switch according to this embodiment is designed as a single-pole switch, the can be switched between an open and a closed position.
  • a PTC resistor 16 is connected to a Short circuit of the Sidac 9 or the controllable switch 10 a thermal Avoid overloading the ignition circuit.
  • the low impedance Resistor 13 would only be the low impedance Resistor 13 present, so in the event of a short circuit of the controllable Switch 10 this will be destroyed. This is prevented by the PTC thermistor 16 since the resistance value of the PTC thermistor 16 increases with increasing warming.
  • the Control circuit 12 is a customer-specific integrated circuit (ASIC or PAL) formed, the voltage supply of the control circuit 12 at the inputs Vcc and Vdd via an input series resistor 17, a rectifier 21 and one Input zener diode 24 and a supply capacitor 25 is ensured.
  • ASIC customer-specific integrated circuit
  • FIG. 1 b the control circuit 12 integrated.
  • Via a Zener diode 22 and one Front resistor 18 monitors the ignition of the lamp in the control circuit 12, i.e. lamp lamp voltage detection performed.
  • Via the diode 23 and the Series resistor 19 is in the control circuit 12 with each positive mains half-wave Line voltage zero crossing detected.
  • controllable switch 10 is open so that the surge capacitor 7, the primary winding 8 of the pulse transformer 5 and the Sidac 9 formed Parallel connection of the one at connections 1 and 1 AC power supply is disconnected.
  • the control circuit i.e. the ASIC preferably a counter that is activated when the zero crossing Mains voltage occurs or the mains voltage has reached a certain level, which corresponds to a certain switching angle. By counting it can be determined when the required switching angle, i.e. the phase position between 60 ° el - 90 ° el or 240 ° el - 270 ° el.
  • the controllable switch 10 is closed, the voltage applied to the auxiliary ignition capacitor 11 being reduced briefly is because by closing the controllable switch 10 of the surge capacitor 7 the Auxiliary capacitor 11 is connected in parallel.
  • the secondary winding 6 of the Pulse transformer 5 itself is low-resistance.
  • the control circuit 12 Upon detection of an ignition pulse, the control circuit 12 immediately opens the controllable switch 10, so that the resonant circuit formed from the surge capacitor 7, the Sidac 9 and the primary winding 8 of the pulse transformer 5 swings out very quickly, since no new energy is supplied to this resonant circuit. As a result, the holding current of the Sidac 9 is quickly fallen below. This allows the switch 10 to be closed again in a very short time after opening the switch 10, so that, according to the invention, a very short pulse train can be ensured.
  • the time in which the controllable switch 10 is open is selected until sufficient recovery of the Sidac 9 is ensured. As a rule, a period of 80 ⁇ s is sufficient for this. This time period, ie the blocking time of the switch 10, however, depends on the type of the switching element 9. It is therefore necessary to set a different blocking time, which can be in the range 40-200 ⁇ s .
  • controllable switch 10 After counting the 80 microseconds by the ASIC, the controllable switch 10 is closed again, so that the ignition process can be repeated in a known manner.
  • FIG. 4 shows a detailed view of the internal structure of the ASIC shown in FIG. 1b 12th
  • control circuit 12 In addition to the ignition pulse detection 15 already mentioned, the control circuit 12 (ASIC) the following additional function blocks:
  • the oscillator 35 Via the Power on reset function block 28, the Ignition circuit reset all function blocks.
  • the oscillator 35 over the Input connections e1 or e2 one or more external components for controlling the Oscillators 35 can be connected, generates an internal clock signal in the kHz range, with which the internal function blocks are fed.
  • the Lamp voltage detection 26 receives a digital signal at input a lit lamp, i.e. after successful ignition of the high pressure gas discharge lamp, and passes this to the start counter 33 after a specified time further.
  • the zero crossing detection 27 is obtained with every positive network half-wave Input b is a digital signal through which the control circuit 12 is preset and is synchronized.
  • the ignition pulse detection 15 serves - as already mentioned - for Initiation of the so-called blocking time of the controllable switch, which is caused by the blocking time function block 31 is controlled.
  • the 50/60 Hz evaluation 29 is used for detection the frequency of the mains voltage and forwards the recognized mains voltage frequency to the Pulse phase logic 30 continues.
  • This pulse phase logic 30 generates during each Mains half wave using the input signals two windows in the phase range 60 ° el-90 ° el or 240 ° el-270 ° el with a high level, in which the AND logic 34 is controlled becomes.
  • the blocking time function block 31 switches on immediately after notification Ignition pulse by the ignition pulse detection 15, the control output d via the AND logic 34 at a low level for a defined time.
  • the economy circuit 32 is for this responsible for a pause of 25s after an ignition operation of 5s (standby operation).
  • the intelligent timer 33 has the task of output d Turn off control circuit 12 when the input signal a, i.e. the Lamp status, does not change for a defined time or already via input a repeated successful ignition of the lamp, for example three times Ignition, has been reported.
  • the AND logic 34 finally links the Output signals of the economy circuit 32, the blocking time function block 31 and the intelligent timer and start counter 33 and generates the control signal d for the controllable switch.
  • the function of the pulse-phase logic 30 and the economy circuit 32 follows described with reference to FIGS. 5a and 5b.
  • the pulse phase logic 30 needs in addition to the Oscillator frequency as further input signals, the zero crossing detection signal Zero crossing detection 27 and the information from the 50/60 Hz evaluation 29, the reports the network frequency. These input signals are in the pulse-phase logic 30 linked and evaluated. After detection of a zero crossing of the mains voltage (Point 1 in FIG. 5), the pulse-phase logic generates 30 windows in the phase range 60 ° el-90 ° el and 240 ° el-270 ° el of the mains voltage (point 2). This is the control of the ignition circuit only within the range requested by the lamp manufacturers Allows phase angles.
  • FIG. 6 serves to explain the AND logic 34 shown in FIG. 4 and the intelligent timer 33.
  • FIG. 6a corresponds to FIG. 5a and shows that with the Ignition circuit according to the invention generated ignition pulses of a network half-wave.
  • Fig. 6b shows the output signal of the control circuit 12, which as a customized integrated Circuit (ASCI, PAL etc.) is formed.
  • the output signal d of the control circuit 12 is made up of the windows of the pulse-phase logic 30 (cf. FIG. 5b) and the so-called Blocking time, which is controlled by the blocking time function block 31 shown in FIG. 4, together.
  • the AND logic function block 34 shown in FIG. 4 links the Output signals of the so-called economy circuit 32 and the blocking time function block 31. These two signals are necessary for the ignition operation to work.
  • the third The input signal of the AND logic 34 is the output signal of the intelligent timer and Starting counter 33.
  • FIG. 7a shows an ignition pulse applied to the lamp in a temporally extended manner Representation
  • Fig. 7b shows the output signal d of the AND logic of the control circuit 12, i.e. the control signal for the controllable switch, also in temporally extended Presentation. If the output signal d of the AND logic assumes the high level, then the controllable switch is switched on, i.e. closed. At point 1 you can see that immediately after turning on the controllable switch 10, the voltage at Auxiliary capacitor 11 drops. The energy of the auxiliary ignition capacitor 11 overflows the controllable switch 10 and the charging resistor 13 in the surge capacitor 7, whereby this is charged until the voltage across the surge capacitor reached a certain switching voltage at point 2.
  • controllable breaks Switch 9 through and induces a voltage in the pulse transformer 5, whereby a high voltage pulse at the connection points 2 and 2 of the lamp 4 and at the Measuring winding 14, a low voltage pulse is induced (point 3). That from the Measuring winding 14 detected ignition pulse detection signal arrives at input c the blocking time function block 31 in the control circuit 12. This function block is then activated and control output d is automatically activated via AND logic 34 set to a low level (point 4). During this predefined blocking period vibrates from the surge capacitor 7, the primary winding 8 and the switching element 9 formed resonant circuit safely, since the controllable switch 10 is open (point 5) and the voltage on the auxiliary ignition capacitor rises again. After the lockout period the controllable switch is switched on again (point 6). Then the repeats itself Ignition process at point 7 as already described with regard to point 1. The curfew is always choose larger than the time required for decay Resonant circuit.
  • the function of the intelligent timer is explained in more detail below with reference to FIGS. 8 and 9 explained.
  • the known circuit shown in Fig. 10 sets after switching off a Lamp to switch on again continuously firing pulses to the lamp has cooled down again so far that a new ignition is possible. It forms a glow discharge between the electrodes, but this is caused by the Lamp not accepted when hot, the lamp by the Glow discharge is additionally heated. The reason for this lies in the fact that in the hot state the gas pressure in the lamp is higher than in the cold state. By the glow discharge, the electrodes of the lamp are additionally damaged, so that the Lamp life is shortened when the lamp is ignited in hot operation shall be.
  • timer circuits have already been used developed a certain time, for example 11 minutes, ignition pulses on the Switch on the high pressure gas discharge lamp and switch off the ignition circuit when the Lamp has not been in operation until the end of this period, i.e. not successful could be ignited. If the lamp ignites before the 11 minutes have elapsed, the the ignition time used up to that point is saved. Should the lamp switch off again, For example, for reasons of aging, the remaining time is up to the given Spent 11 minutes again to apply ignition pulses for a new ignition to put on the high pressure gas discharge lamp. The total ignition time of 11 minutes is started when the lamp is switched on. An intermittent shutdown of the Lamp can also be caused, for example, by a drop in the mains voltage are caused.
  • the lamp should be re-ignited within of the 11 minutes total ignition time may be possible.
  • the aging of a lamp manifests itself for example in that the operating voltage rises above the mains voltage with which Consequence that the lamp can no longer be operated and switches itself off. Kick this case after 11 minutes, the lamp remains switched off permanently.
  • the one before described 11 minutes total ignition time resulted from practical considerations, because such a timer was available on the market. But also are on other timers adjusted total ignition times conceivable.
  • FIGS. 8a and b and FIG. 9a The function of the known timer described above is shown in FIGS. 8a and b and FIG. 9a.
  • Fig. 8a shows the tripping of a faulty lamp three times. Dependent from the cooling of the lamp is however a more frequent ignition of the lamp possible. Frequent switching off of the faulty lamp is disadvantageous because of this may start to blink in the lamp (so-called cycling mode). Due to the frequent and switching on does not only affect the ballast of the lamp drawn, but the blinking can also be very distracting when lighting rooms his. From Fig. 8b it can be seen that after the first ignition of the lamp in Area 1 has an ignition remaining time of 10 minutes 55 seconds.
  • the lamp is switched off for the first time, the ignition is operated for 5 minutes, so that after when the lamp is re-ignited in area 3, an ignition remaining time of only 5 Minutes 55 seconds is available.
  • Ignition pulses applied to the lamp for a further 5 minutes until the lamp lights again (Area 4 and 5). So there is only an ignition remaining time of 55 seconds available below the area 6 after switching off the lamp again is exploited, it is not possible to re-ignite the lamp and the timer stops the ignition operation after the ignition remaining time.
  • the function of the timer for an old lamp or in the event that the lamp goes out due to so-called 9 shows the function of the timer when there is no or broken lamp.
  • Fig. 9a shows that with a missing or defective lamp the well-known timer without successfully igniting the lamp be applied to the lamp until the ignition remaining time.
  • the ignition pulses be applied by the to control intelligent timer 33 shown in FIG. 4 such that a lamp is hot Condition is only subjected to a relatively short time with ignition pulses (for example 5 seconds) to a longer time (e.g. 25 Seconds).
  • ignition pulses for example 5 seconds
  • a longer time e.g. 25 Seconds.
  • the intelligent one Timer 33 designed in such a way that a lamp that is switched on does not exceed one to make a certain number (for example three) of reactivations if In the meantime, an unwanted shutdown has occurred. After each shutdown for a certain time (e.g. approx.
  • 8c shows the timer control according to the invention, whereby it can be seen is that after the third lamp start the ignition circuit is switched off and in Ignition operation only be applied to the lamp for 5 seconds. Between The 5s pulse packages are designed for 25s standby operation.
  • the in Fig. 8c represented timer control occurs e.g. in the case of an old lamp or power cuts in function.
  • 9b shows the timer control according to the invention in the event of a defective or missing lamp. It is provided according to the invention that the ignition circuit switches off automatically after a pulsed ignition operation of 22 minutes. This means that a maximum of 22 minutes of ignition is available for a lamp start stand.
  • the lamp start detection has the effect of switching off the Ignition circuit in the event of a fault regardless of the lamp technology selected.
  • the light-emitting diode can, for example switched off when the lamp is lit and switched on when the lamp is defective.
  • the light-emitting diode may flash while the igniter is being ignited. It can also do that Signal via a digital or analog interface to a remote one Control unit are fed.
  • the achievable profits with the previously described first exemplary embodiment according to the invention can be seen, for example, from FIGS. 5 and 6. It can be seen that with the ignition circuit according to the invention in the phase range 60 ° el-90 ° el or 240 ° el-270 ° el a very high number of pulses of approximately 13 ignition pulses can be generated, each of which also has the ignition pulse voltage prescribed by the lamp manufacturers . An ignition pulse package with such a high number of ignition pulses ensures that the ignition is very reliable. Since the distance between the ignition pulses is less than 0.3 ms, the pulse widths of the individual ignition pulses can be added to form a total ignition pulse package, it being apparent from FIGS. 5 and 6 that the total ignition pulse width of an ignition pulse package that can be achieved by the ignition device according to the invention greater than that prescribed by the lamp manufacturers 2 ⁇ s are.
  • control circuit 12 Another advantage of the control circuit 12 according to the invention is the presence 4, which is a lamp ignition detection carried out and thus indicates when the lamp has become self-conductive is, i.e. a gas discharge path has been formed in the lamp. After this Ignition of the lamp, a voltage drops across the lamp, so that the Mains voltage to the voltage dropping at the choke 3 and that at the lamp 4 drops falling voltage, since the pulse transformer 5 itself is low and can thus be neglected. In the operating state, one falls on the lamp Voltage of approx. 100 V. This voltage is below the breakdown voltage of the Sidac 9, so that no further ignition pulses are generated in the operating state of the lamp can be.
  • the control circuit By recognizing and indicating that the lamp is in operation it is possible to cause the control circuit to switch the controllable switch 10 permanently to open or close.
  • the permanent opening or closing of the controllable Switch 10 is advantageous for the following reasons.
  • controllable switch 10 If the controllable switch 10 is closed permanently, the series circuit is out the surge capacitor 7, the charging resistor 13 and the controllable switch 10 parallel to the high pressure gas discharge lamp 4. For the operation of a high pressure gas discharge lamp lamp manufacturers demand that a capacitive load of the lamp is connected in parallel. This could be done by permanently closing the controllable Switch 10 can be ensured due to the strong capacitance of the ignition capacitor 7 so that the auxiliary ignition capacitor 11, which per se as a capacitive load for the lamp 4 is provided, can be omitted. The circuit structure of the ignition circuit could thus be simplified.
  • controllable switch 10 by the control circuit 12 after the ignition the lamp is permanently open, the one above the controllable switch 10 lying circuit part with the surge capacitor 7, the primary winding 8 and Switching element 9 and also consume no energy during the operation of the lamp not subject to wear.
  • the ignition process takes place after a predefined time interrupted. Because of this targeted activation of the controllable switch 10 the high voltage load is more defined and viewed over the entire time less than in the known ignition method. Therefore, the function of the series choke 3 can also be taken over by the pulse transformer 5. The throttle 3 is thus lapse and the circuit structure is simplified.
  • FIG. 2 shows a second Embodiment of the ignition circuit according to the invention, wherein a two-pole controllable switch 10 is provided, which is between a position (1) and (2) is switchable.
  • a two-pole controllable switch 10 is provided, which is between a position (1) and (2) is switchable.
  • position (1) the surge capacitor 7 on the one hand and the series connection of the primary winding 8 with the Sidac 9 on the other hand Parallel connection of the AC voltage supply to the input connections 1 and 1 is present, separated and short-circuited, so that a charging resistor 13 Accelerated discharge of the surge capacitor 7 is possible, whereby the Discharge time of the surge capacitor 7 is reduced.
  • FIG. 3 shows a variant of the second invention shown in FIG. 2 Embodiment, wherein only the position of the charging resistor 13 changes is.
  • the function of the ignition circuit shown in Fig. 3 corresponds to the function of Ignition circuit shown in Fig. 2.
  • the ignitor according to the invention also via a corresponding interface ignition timing jumpers and power switches available on the market combined can be.
  • Ignition time jumpers are used during the period the lamp required until the nominal luminous flux is delivered, a normal light bulb etc. is activated, to ensure a sufficient level of basic lighting.
  • Power switch on the other hand, on the one hand, ensure the ignition is compliant with the regulations, and on the other hand step-dimmed lamp operation to save energy.
  • the ignition A lamp is prescribed by the lamp manufacturer before dimming one High pressure lamp to operate this with 100% power consumption during 330s.
  • ignition jumpers or power switches can also do that Ignitor according to the invention take over if the ASIC 12 accordingly is expanded in terms of circuitry.
  • the ignitor can then depend on the output circuitry as power switch or ignition timing jumper be used.

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  • Circuit Arrangements For Discharge Lamps (AREA)
EP96927655A 1995-08-28 1996-08-01 Zündschaltung für eine hochdruck-gasentladungslampe Expired - Lifetime EP0847681B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19531622A DE19531622B4 (de) 1995-08-28 1995-08-28 Zündschaltung für eine Hochdruck-Gasentladungslampe
DE19531622 1995-08-28
PCT/EP1996/003397 WO1997008921A1 (de) 1995-08-28 1996-08-01 Zündschaltung für eine hochdruck-gasentladungslampe

Publications (2)

Publication Number Publication Date
EP0847681A1 EP0847681A1 (de) 1998-06-17
EP0847681B1 true EP0847681B1 (de) 2001-12-05

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EP96927655A Expired - Lifetime EP0847681B1 (de) 1995-08-28 1996-08-01 Zündschaltung für eine hochdruck-gasentladungslampe

Country Status (10)

Country Link
EP (1) EP0847681B1 (no)
AT (1) ATE210364T1 (no)
AU (1) AU698825B2 (no)
DE (2) DE19531622B4 (no)
ES (1) ES2169252T3 (no)
NO (1) NO323736B1 (no)
NZ (1) NZ315658A (no)
TR (1) TR199800235T2 (no)
WO (1) WO1997008921A1 (no)
ZA (1) ZA966972B (no)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102010039487A1 (de) 2010-08-18 2012-02-23 Osram Ag Schaltungsanordnung und Verfahren zum Betrieb einer Gasentladungslampe

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US5945784A (en) * 1997-12-09 1999-08-31 Philips Electronics North America Corporation High intensity discharge ballast
ES2212824T3 (es) * 1998-09-15 2004-08-01 Quality Light Electronics S.A.S. Di Francesco Celso E C. Dispositivo de ignicion de resonancia para lamparas de descarga.
FI107578B (fi) * 2000-03-06 2001-08-31 Helvar Oy Ab Menetelmä ja sytytyspiiri suurpainelampun sytyttämiseksi ja sammuttamiseksi
IL138896A0 (en) * 2000-10-05 2001-11-25 Hashofet Eltam Ein An ignitor for discharge lamps
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ES2169252T3 (es) 2002-07-01
DE19531622A1 (de) 1997-03-06
NZ315658A (en) 1999-05-28
AU6741196A (en) 1997-03-19
DE59608386D1 (de) 2002-01-17
WO1997008921A1 (de) 1997-03-06
AU698825B2 (en) 1998-11-05
NO323736B1 (no) 2007-07-02
ATE210364T1 (de) 2001-12-15
DE19531622B4 (de) 2011-01-13
EP0847681A1 (de) 1998-06-17
ZA966972B (en) 1997-09-19
NO980865L (no) 1998-02-27
NO980865D0 (no) 1998-02-27
TR199800235T2 (xx) 1998-08-21

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