EP2088837B1 - Procédé de fonctionnement d'une lampe UV - Google Patents

Procédé de fonctionnement d'une lampe UV Download PDF

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Publication number
EP2088837B1
EP2088837B1 EP08101250A EP08101250A EP2088837B1 EP 2088837 B1 EP2088837 B1 EP 2088837B1 EP 08101250 A EP08101250 A EP 08101250A EP 08101250 A EP08101250 A EP 08101250A EP 2088837 B1 EP2088837 B1 EP 2088837B1
Authority
EP
European Patent Office
Prior art keywords
lamp
ignition
voltage
frequency
control unit
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.)
Not-in-force
Application number
EP08101250A
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German (de)
English (en)
Other versions
EP2088837A1 (fr
Inventor
Asmir Semanic
Stefan Richartz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uviterno AG
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Uviterno AG
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Publication date
Application filed by Uviterno AG filed Critical Uviterno AG
Priority to AT08101250T priority Critical patent/ATE511741T1/de
Priority to EP08101250A priority patent/EP2088837B1/fr
Priority to ES08101250T priority patent/ES2364440T3/es
Publication of EP2088837A1 publication Critical patent/EP2088837A1/fr
Application granted granted Critical
Publication of EP2088837B1 publication Critical patent/EP2088837B1/fr
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Classifications

    • 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
    • H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2881—Load circuits; Control thereof
    • H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
    • H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
    • 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase
    • H05B41/388—Controlling the intensity of light during the transitional start-up phase for a transition from glow to arc

Definitions

  • the invention relates to a device for operating a UV lamp according to claim 1.
  • Powerful UV lamps are used as UV lamps for a variety of purposes. For example, for drying and / or curing liquids, gels, adhesives, paints and paints.
  • the UV radiation causes a chemical reaction.
  • DNA strands can also be separated.
  • the UV irradiation with such lamps can support chemical processes, as well as the exposure of photoactive materials (eg, lithography), or fluorescence excitation of various substances (eg, banknote validators). This technique is mainly used for UV curable materials such as curable polymers, paints and adhesives.
  • Such UV lamps are designed according to the prior art as gas discharge lamps and are electrically powered and driven with appropriately suitable ballasts.
  • the characteristic of such powerful gas discharges requires the operation to comply with certain measures.
  • the lamp is operated on the AC mains and connected in series with the lamp, a throttle for limiting the current.
  • measures must be taken to ignite the gas discharge, such as the application of a voltage pulse to the discharge path to initiate the discharge. This is a voltage which is excessive compared with the burning voltage and which is applied for a short time and is no longer necessary after ignition has taken place. After ignition, the impedance of the discharge path is lower and the lamp continues to burn with the aid of the applied AC voltage.
  • ballasts for example traditional throttle controls, as well as increasingly, special electronic ballasts (EVG) are used for the control of a UV lamp.
  • the ballasts must, however, always have the flat characteristic of a UV lamp - the burning voltage is almost independent of the current - can provide.
  • the conventional ballasts use the property of the choke and are therefore connected in series with the 400V AC grid. For the adjustment of the lamp power single additional chokes are switched to it. This means, for example, to drive with the switch open at 50% power, with the switch closed at 100% power.
  • a ignitor is needed to start the spotlight.
  • a compensation of the image stream is necessary.
  • ballasts are large and heavy chokes, transducers and transformers with iron cores and due to the low frequency of 50Hz, components with high inductance values. High stray fields and thermal dependence of the electrical properties are further disadvantages. Each KVG unbalanced loads the three-phase network.
  • Such electronic ballasts are usually constructed as a full-bridge inverter.
  • Thejanskose the electronic ballasts can in those with low-frequency rectangular operation (eg, with 250 Hz) and those with higher-frequency throttle operation (eg 100 kHz) are divided.
  • the superposition principle with the help of an external igniter and on the other hand can be divided into one in which a resonant UC resonant circuit is applied. In both cases, however, additional components are required, which increase the effort.
  • the EP-0 689 373 envisages the use of an interface in a circuit for operating a UV lamp.
  • the synchronization by its own control is about in the GB 2 274 430 mentioned for a printing machine, which indicates a synchronization of the switching of the UV lamp from a normal operation in a stand-by mode and the operation of the shutter as possible, to which separate control means are provided, which will not be discussed in detail.
  • a control device to a possible, but not addressed synchronization is missing any hint in the US 5,343,629 or in the JP 08-072270 ,
  • the present invention is therefore based on the object to avoid the disadvantages of the prior art.
  • the object of the invention is to enable a simplified and economical operation of the UV lamp using largely standardized components, since the invention comprises the essential operating elements including the control for the operation of the lamp in a single system, and simply a higher level Process control is einbindbar. Furthermore, the operational reliability and service life of the lamp should be increased by the invention, wherein the operating values are reproducible with high accuracy. In addition, the arrangement for operating the UV lamp and the method itself should be easy and economical to implement.
  • This method allows a very smooth operation of the lamp and a very flexible process management with complete integration of all necessary conditions for safe operation in a single arrangement thanks to the voltage and frequency control of the inverter. It also makes it possible to operate different lamp types and outputs with the same concept. A scaling of the performance classes with standard components is thus given in a very large area.
  • the ignition process can with a separate ignition arrangement or with an additional ignitor by briefly applying and superimposing a voltage over the voltage boosted voltage as a voltage pulse with sufficient voltage-time surface be initiated.
  • the method with control of the frequency and / or the output voltage of the inverter makes it possible to completely dispense with such an additional ignitor.
  • the arrangement is greatly simplified and allows a gentle ignition of the lamp.
  • the current-limiting means consist of a series-connected inductor, which further simplifies the structure of the arrangement and additionally allows a voltage increase on the lamp to ignite in a simple manner, if for the ignition of the electronic control in each case the frequency and the voltage according to predetermined Values increased until the ignition occurs.
  • the ignition process can be easily monitored, preferably by measuring the voltage dip and / or the current increase on the lamp or in the supply lines or on the inverter, or with a light sensor. If the ignition is unsuccessful, another ignition process or several of these can be initiated automatically, as required, until a safe and stable operating state is achieved.
  • the operating power of the lamp is set or regulated with the frequency according to the higher specification or according to a profile with the control.
  • a movable shutter is operated as a so-called shutter in front of the lamp according to the process specifications by means of the controller.
  • Such a shutter can be opened, for example, for the UV radiation of the lamp when the baking phase is over and a stable operation is ensured, and it can be selectively closed again after delivery of a radiation dose to the workpiece, sheet or other object to be machined.
  • the controller itself advantageously has an interface, which makes it possible to connect the system to a further, external or higher-level process controller. This makes it possible to modularly build the system as a stand-alone unit, increasing the flexibility of delivery and reducing the cost of storage, and reliably operate and monitor the UV lamp with all its operating parameters.
  • Fig. 1 is divided into two parts, the two parts are thought to be connected to each other via the lines 17, 18, 11 'and 20'.
  • a converter 1 is used as a ballast having a full bridge 4, which converts an input voltage 2, 2 'in a bipolar voltage with a predetermined frequency and voltage and at the output 16, 16' of the inverter 1 for the lamp 8 provides.
  • the lamp 8 is connected via leads 17, 18, 19 with the outputs 16, 16 'of the inverter 1 via a series-connected throttle 13 as a current limiting element.
  • the throttle 13 is a particularly easy-to-implement device and is robust. Therefore, it is preferably used.
  • the full bridge 4 is operated via a driver circuit 3 and controlled by a control unit 14 via a supply line 6 for the specification of desired values (eg via a respective setpoint generator) such that the frequency and the voltage at the lamp 8 are selected within wide ranges can.
  • the DC voltage (DC) 5 at the input 2, 2 'or the output voltage at the converter 1 is detected by the controller 14 (for example by means of corresponding sensor arrangements) and processed according to the setpoint specifications, in particular for control purposes.
  • the controller measured on the load side of the lamp current 7, detected by the controller 14 and processed.
  • the controller advantageously has an interface or is connected to one such as, for example, input and output lines 15 having a bus connection, e.g. a fieldbus to allow a higher-level process control.
  • the UV lamp 8 is arranged in a cassette-like lamp holder 9, which can be designed in a variety of ways, for example in the manner of, as the US 5,094,010 or the 5,343,629 it can be seen, wherein the holder 9 in the latter case is an insertion part.
  • a reflector 21 is accommodated in the cassette-like lamp holder 9 in such a way that the radiation emitted by the UV lamp 8 impinges bundle on the respective substrate or object, for example a flat printed surface, and thereby does not overheat the lamp Substrates allows.
  • the cassette 9 is opened in the front area or covered by a transparent plate, below which the workpieces to be treated or the substrate are placed.
  • a swiveling aperture with a controlled drive is advantageously provided as a shutter 20 in order to be able to carry out the exposure of the workpiece with UV light in a targeted and controlled manner.
  • the shutter 20 is shown as consisting of two linearly displaceable shutter blades, but it may take any known form in the art, so be a pivotable or rotatable shutter.
  • a temperature sensor 11 is advantageously provided in the region of the lamp 8, for example a platinum sensor, as it is known as PT 100, the signal of which is in turn detected and taken care of by the controller 14 (FIG. Regulation) that the lamp 8 is not thermally overloaded.
  • PT 100 platinum sensor
  • a cooling system may additionally be provided, as indicated by means of a cooling fan 22.
  • a water cooling is known, which could also be used here.
  • the controller 14 is advantageously a programmable controller, such as a computer controller, a microcomputer controller or a so-called PLC controller. With this control 14, the lamp 8 can be ignited and operated in a gentle manner, which increases their life. The desired operating values are maintained, taking into account the delicate operating requirements, since the correct operation is constantly monitored.
  • age-related changes can be automatically compensated via the controller 14 and associated sensors by tracking at least one of the parameters of power and / or time of UV exposure, for example via an output line 23 of the controller 14 and the cooling or temperature regulated becomes, for which the sensor 11 is particularly advantageous as a temperature sensor.
  • the shutter 20 can be used for precise adjustment or correction.
  • the inventive method allows a flexible and application-specific operation.
  • transport system such as a conveyor belt for supplying workpieces, in particular printed flat material is provided, which is driven by a drive motor 25, so it can to determine a sufficient irradiation with UV light 10 be advantageous to synchronize this drive 25 with the shutter 20.
  • a drive motor 25 for this purpose, one, only shown schematically without the required Motoran Kunststoffhand, synchronizing 27 as the output of the control device 14 is provided.
  • the motor may then be speed-controlled in analogue form, but may be continuous, or it may be started intermittently synchronously with the shutter movement.
  • the drive of the only schematically indicated turntable 26 can, as shown, on the circumference cams (or recesses) have, which cooperate with the bearing switch 29, which then connected instead of the sensor 28 to the control unit 14 leading line 38 is.
  • a switch S may be provided.
  • the turntable motor can, for example, via a switch 29 bridging pulse in motion, whereupon the turntable cam removed from the switch, this is switched and then keeps the engine in motion.
  • Rotary drive 26 which can also be used continuously or (preferably) intermittently used to record each workpiece at one point and then bring under the lamp 8.
  • the synchronization may be in both transport systems 24 and 26 by a sensor device, such as an optical sensor 28 for detecting the arrival of an edge of a printed sheet at a predetermined location under the lamp 8, or by a switch 29 as a position sensor for the position of the turntable 26, to be supported.
  • a marker for a particular position for synchronization with the shutter 20 could also be provided on the belt 24, and it is also possible to completely dispense with a sensor by the motor 25 as stepper motor (or synchronous motor) is formed, which performs as many steps as the length of a printed sheet corresponds to bring it under the lamp 8.
  • an external ignition device 12 which outputs an ignition voltage to the lamp 8, which can be coordinated by the controller 14.
  • This type of ignition can be used for individual specific dopings or special lamp geometries. However, operation via such an ignition preserves the lamp 8 somewhat less than the ignition directly with controlled frequency and voltage variation of the converter voltage itself, which is referred to herein as "internal ignition”.
  • the internal ignition is based on a method in which over time a defined frequency and output voltage (U RMS_OUT ) is set up.
  • This method of igniting the UV lamp 8 requires as the only power components the inverter 1 and the choke 13 and 31, respectively.
  • the course of the voltage as a function of time is in Fig. 2 shown, the course of the frequency in Fig. 3 ,
  • This variation of voltage and frequency results in a voltage-time area that is sufficiently large that it causes the UV lamp 8 to ignite. It uses the property of the voltage overshoot of a series resonant circuit, which is formed from the inductance of the inductor 13, 31 and the capacity of the UV lamp 8 itself.
  • the lamp 8 can be idealized as a parallel connection of a capacitor and an ohmic resistance, wherein the capacity changes after ignition.
  • This idealization of the UV lamp 8 is essentially defined by the lamp geometry and the filling.
  • the ignition of the UV lamp 8 takes place at a voltage which results both when the positive voltage is reached and when the negative voltage is reached.
  • the inventive concept realized in this way thus lies in the combination of the three components and a special method of varying the lamp voltage in combination with the frequency.
  • the frequency and at the same time the effective value of the output voltage at the converter 1 is preferably continuously varied or increased.
  • the voltage is increased until the ignition occurs and the transition from the glow discharge to the arc discharge B is detected.
  • the transition from B to D manifests itself in a very strong increase in current and can thus be detected easily.
  • the transition is in a known and repeatable frequency range F1, t1 to F2, t2. If the radiator 8 could not be ignited, then the controller 14 breaks off at point C, t2. After a short residence time then the ignition is new, for example, again at point A, started.
  • the discharge current and / or the voltage is regulated to a defined value until the required operating point of the UV radiator 8 (temperature, power) is reached, that is in the point E.
  • the lamp 8 After the end of the baking phase at E, the lamp 8 is set directly to the required target power F. From this point the lamp 8 is ready for use. However, it is possible, for example for dimming, to vary the power by varying the frequency to the point G, which is shown here as a reduction of the frequency.
  • the phases from the point G to the points H, K and L can be defined as actual production phase or process phase.
  • the shutter 20 In this phase, the shutter 20 is selectively opened and closed again after reaching the process window. For example, a standby state is activated at point H by increasing the frequency F and lowering the voltage V, which lowers the power. This state is deactivated, for example, in point J again.
  • the shutter 20 is closed, the workpiece, substrate or area to be irradiated is changed for the next treatment, without the sensitive UV lamp 8 has to be switched off and re-ignited.
  • This standby phase can also be used in translating presses during the retraction phase.
  • the frequency-dependent resistance of the throttle can be exploited. This means: To increase the output power, the frequency must be reduced, namely from point F to Points G. Conversely, for a power reduction, the frequency must be increased, for example, from the point E to F or from H to I. If you consider the structure idealized (UV emitter 8 as ohmic consumer, inductance as RL combination), Thus, the radiator performance can be calculated without knowing the characteristics of the radiator 8. For the calculation, the current I, the frequency f, the output voltage of the inverter U OUT and the inductance L of the choke are then sufficient.
  • the power can also be set in an advantageous manner by adjusting or by controlling the voltage for influencing the current, or it can also be done in combination with the frequency variation by the inverter 1 is driven by the control unit 14 accordingly.
  • the voltage setting is made in the inverter 1 by setting a specific pulse width ratio, whereby after the choke on the lamp 8, a mean DC voltage value (DC) appears.
  • the ignition is done by superimposing an excessive voltage, for example by a voltage pulse in the points D, ti, wherein the inverter 1 is operated at a fixed predetermined frequency and fixed voltage to the lamp 8 and then after ignition, as described above, the Power values for the burn-in phase and the operation by setting the frequency and the voltage is set or regulated.
  • the arrangement is preferably operated over all operating phases with a constant frequency, for example, with a few hundred Hz, for example with 250Hz.
  • Table 1 are the various states as shown in the Fig. 2 to 5 are listed for an overview: ⁇ b> Table 1: ⁇ / b> Point operating mode description A to B ignition Glow discharge and / or arc discharge in the small power range A to C ignition Without ignition B to D ignition Change from glow to arc discharge, detection due to very strong current increase D to E burn-in current-controlled burn-in phase until the operating temperature of the lamp is reached C to R ignition Restart of the ignition after failed ignition R to A ignition restart E to F business operational F to G business Power adjustment (dimming) G to H business Production phase without power control H to I business Change to standby I to J. business standby J to K. business Change of operating mode K to L business Production phase with power control by varying frequency and / or voltage F1 ignition minimum ignition frequency Fi ignition Ignition frequency with successful ignition F2 ignition maximum ignition frequency T1 ignition first possible ignition Ti ignition Time of ignition T2 ignition latest possible ignition
  • the inventive method is particularly suitable for lamp operating power in the range of 0.5 to 30 kW at current values of 1A to 60A.
  • the converter 1 without the ignition, voltages and at least in the range of 10 to 1600V, but preferably in the range of 10V to 500V, in particular variable, generate and can deliver.
  • the arrangement should be designed in such a way that an ignition voltage> 800 V is achieved at the lamp 8 is, preferably> 1000V, but highest 6000V.
  • the frequency of the output voltage of the inverter 1 should be within the range of 1 Hz to 100 kHz, preferably in the range of 1 Hz to 10 kHz, and should be suitably varied.
  • the bipolar voltage is in this case substantially symmetrical and advantageously substantially rectangular.
  • the feeding of the lamp 8 is conveniently carried out by a single inverter 1, which is advantageously used on the market standard component.
  • This phase includes a power control and / or control, preferably in the form of a current control. This phase continues until thermally sufficient conditions are reached. Typically, above all the conditions within the cassette 9 are of interest, and here too, in particular those of the UV lamp 8.
  • the power variation can be adjusted by adjusting the frequency and / or the output voltage.
  • the standby power is adjusted by adjusting the output voltage and / or the frequency.
  • an external ignition device 12 can be completely dispensed with.
  • the voltage at the converter output 16, 16 ' is varied in such a way that frequency and voltage reach a value (voltage-time surface) defined for the ignition of the UV lamp 8, which fulfills the ignition conditions.
  • the UV lamp 8 is ignited with fewer components, and also gentler.
  • the conveniently programmable controller 14 such as a PLC controller, may include additional functions such as control of the shutter 20, communication, and the like. provide.
  • a possibly provided bus connection allows coupling to a higher-level control.
  • controller 14 allows an adjustment of important operating parameters that change due to aging, so as to ensure optimum conditions for the curing process over the entire lamp life.
  • an external ignition device 12 is preferred in order to achieve a safe ignition, as shown schematically in FIG Fig. 6 is shown.
  • Such lamps for example, have a smaller diameter or a different doping, which makes the ignition more difficult.
  • the advantage of such a starting aid (36) is that only low-power components are used, but not the operating current for the UV lamp flows through the exclusive auxiliary power.
  • the additional, external ignition device 12 is connected as a starting aid in the power circuit with the negative line 39 and the positive line 40.
  • the ignition device 12 includes a transformer 30 having two windings 31, 32, which are coupled together via a ferromagnetic core, and an electrical circuit, the Zünd Anlagennbeschari 36.
  • the one winding is formed as a main winding 31 and takes over the function of the throttle 13, 31 as the current limiting element, which is connected in series in one of the lamp leads 39, 40. In this case, it does not matter whether this throttle 13, 31, is integrated in the negative line 39 or in the positive line 40.
  • throttle 31 and ignition coil 32 can be performed with throttle 31 and ignition coil 32 as a single component.
  • the second winding 32 represents the ignition winding, and via this potential, a firing voltage via its two terminals 33, 34 is coupled.
  • the ignition voltage is provided at these two terminals 33, 34 by a Zünd Anlagennbesclien 36, which in turn via its two terminals 35, 37 refers to a supply voltage from the lamp connection lines 39, 40.
  • This Zünd Anlagennbesclien 36 includes a svervielfacheraniser, which generates from the provided at the inverter 1 lamp supply voltage to safely ignite the lamp 8, a correspondingly increased voltage. In most cases, a voltage doubling is sufficient, which is preferred.
  • the ignition voltage across the feed line 17, 18 and 39, 40 of the UV lamp 8 with to limit a voltage limiter 46, so that the ignition voltage is substantially independent of the cable length used and the lamp 8 can still be safely ignited.
  • a voltage limiter can also be provided directly in the Zünd Vietnamesenbesciens 36 via the feed terminals 35, 37.
  • the Zünd Vietnamesenbesciens 36 is operated via a switch 47 such that it is active only in the ignition phase and deactivated in the operating phase of the lamp 8 (eg off).
  • the switch 47 is actuated by the control unit 14 via a control line 48.
  • FIG Fig. 7 The schematic of a preferred arrangement for a priming circuit 36 is shown in FIG Fig. 7 shown schematically and corresponds substantially to the in Fig. 1 shown arrangement.
  • the circuit for the voltage increase is preferably made of passive electronic components.
  • An expedient embodiment is constructed as follows. A capacitor and a diode are electrically connected in series with each other, which in turn are connected in parallel with a further, separate series circuit of a capacitor and a diode. The two diodes 44, 45 are connected in anti-parallel.
  • On one side of the first terminal 35 of the UV lamp 8 is connected, and on the other side via an activation switch 47, a second terminal 37 of the UV lamp. Parallel to the first terminal 35 and the second terminal 37, a voltage limiter 46 is provided.
  • the polarities can also be interchanged, ie the polarity of the ignition pulses can be positive or negative.
  • This Zünd Anlagennbesciens 36 can be advantageously adapted to existing chokes 13 with an additional auxiliary winding 32, so as to provide the possibility of retrofitting existing circuit.
  • the output lines 33, 34 of the ignition assistance circuit 36 lead, for example, in the in Fig. 6 shown manner to ignition coil 32nd
  • the ignition aid 12 is activated.
  • the capacitors are charged with a voltage doubling circuit until a defined voltage level is reached.
  • the stored charge is discharged from the capacitors via the voltage switch and transformer 30 to the lamp 8.
  • the two windings 31, 32 are used for the transformation of the ignition voltage. From the ignition winding 32 to the main winding 31, the voltage is transformed up. The voltage of the transformed charge is at least so large that the ignition of the lamp 8 is made possible.
  • the main winding 31 is also used for smoothing the lamp current.
  • the required energy for the ignition (voltage-time area) is stored by charging the capacitors 42, 43 to different voltage potentials.
  • the diodes 44, 45 and capacitors 42, 43 are connected to provide voltage multiplication (e.g., voltage doubling). If the charge is sufficiently large, i. the charging voltage reaches a predetermined, possibly adjustable, switching threshold of the voltage switch 41, so this is delivered to the ignition winding 32.
  • the ignition energy is up-converted with a conversion from the ignition winding 32 to the main winding 31.
  • the output voltage (ignition voltage) is limited by means of a voltage limiter 46 and thus independent of the line length used 39, 40.
  • the ignition aid 12 is activated with a switch 47 during the ignition phase, but deactivated in the operating phase. As long as the switch 47 keeps the ignition aid 12 in operation, this successively generates ignition pulses, which are defined in time by the wiring until the lamp 8 ignites and then the controller 14 via the switch 47, the ignition aid 12 again disabled.
  • the preferred method of ignition with an external ignitor 12 thus comprises the following steps:
  • An ignition voltage is by charging at least two capacitors 42, 43 to voltage potentials for storing the energy required for the ignition, wherein the diodes 44, 45 are connected to the capacitors 42, 43 such that at least one voltage doubling is achieved.
  • the desired predetermined charging voltage reaches a corresponding switching threshold of a voltage switch 41 (threshold value switch)
  • a voltage switch 41 threshold value switch
  • the ignition energy is up-converted to a predetermined value with conversion from the ignition coil 32 to the reactor 31 constituting the main coil.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (27)

  1. Dispositif de fonctionnement d'une lampe UV (8) ayant des électrodes,
    qui comprend
    un convertisseur (1) ayant des sorties (16, 16') pour produire une tension d'alimentation bipolaire aux sorties (16, 16'), qui est admis à la lampe UV (8) à travers des conducteurs d'amenée (17-19),
    un élément limiteur de courant (13), qui relie la lampe UV (8) aux sorties (16, 16') à travers les conducteurs d'amenée (17-19);
    le convertisseur (1) comprenant en outre des moyens redresseurs de tension, qui sont reliés à un réseau d'alimentation à travers des raccords redresseurs, ainsi qu'une unité de commande électronique (14);
    dans lequel l'unité de commande électronique (14) est formée de façon, qu'une fréquence à la sortie du convertisseur (1) et la valeur effective de la tension d'alimentation bipolaire peuvent être choisies, la valeur effective de la tension d'alimentation bipolaire étant ajustable par un ajustement d'un rapport prédéterminé de largeur d'impulsion;
    le dispositif étant formé de manière,
    qu'après la mise en service du convertisseur (1), la tension d'alimentation bipolaire est appliquée aux électrodes de la lampe UV (8), et une procédure d'allumage (A, D) peut être amorcée à l'espace de décharge de la lampe UV (8), l'allumage (D) effectué étant surveillé à l'aide de l'unité de commande électronique (14);
    qu'après l'amorçage (D) effectué, une phase donnée de chauffage (D, E) de la lampe UV (8) est effectuée, l'unité de commande électronique (14) déterminant, surveillant et traitant celle-ci au moyens des moyens de surveillance (7, 11, 38), et dans lequel l'unité de commande électronique (14) ajuste et/ou règle la valeur effective de la tension d'alimentation bipolaire et/or la fréquence d'une manière, que des paramètres spécifiques de lampe sont respectés;
    qu'après l'achèvement de la phase donnée de chauffage (D, E) une puissance nominale de lampe prédéterminée peut être donnée, avec quoi un état prêt à être mis en service de la lampe UV (8) est atteint, ladite puissance nominale de lampe prédéterminée pour une phase suivante de service (F, H, J, K, L) étant ajustée par commande de la fréquence et/ou de la valeur effective de la tension d'alimentation bipolaire;
    dans lequel l'unité de commande électronique (14) est formée pour contrôler les phase se déroulantes, et comprend un interface périphérique pour mettre des données pour un traitement ultérieur à la disposition d'une unité prioritaire de commande,
    caractérisé en ce, que
    le dispositif comprend en outre un entraînement de transport (24, 25, 26) pour transporter un substrat à irradier, en particulier des plats, ainsi qu'un shutter (20), l'unité de commande électronique (14) étant formée pour synchroniser l'entraînement de transport et le shutter, et pour conduire le shutter (20) pendant la phase de service (F, H, J, K, L) de la lampe UV (8) en correspondance avec les prédéterminations de processus.
  2. Dispositif selon la revendication 1, caractérisé en ce, que l'élément limiteur de courant (13, 31) comprend un élément de réactance (31), qui est en série avec la lampe UV (8).
  3. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que le dispositif comprend un circuit à résonance série, qui est formé par la capacité de la lampe UV (8) et l'élément de réactance (31), et qui est mis en résonance par variation de la fréquence et/ou de la valeur effective de la tension d'alimentation bipolaire, tout en produisant ainsi une énergie d'amorçage pour allumer (B, D) la lampe UV (8).
  4. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que pendant le fonctionnement d'allumage (A, D) non seulement la fréquence, mais encore la valeur effective de la tension d'alimentation bipolaire sont variées.
  5. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que pendant le fonctionnement d'allumage (A, D) non seulement la fréquence, mais encore la valeur effective de la tension d'alimentation bipolaire sont augmentées simultanément.
  6. Dispositif selon la revendication 2, caractérisé en ce, que l'élément de réactance (31) est formé comme une bobine d'un transformateur (30) ayant un noyau d'un matériau ferromagnétique, et que le transformateur (30) est couplé d'une façon électromagnétique à une autre bobine d'allumage (32).
  7. Dispositif selon la revendication 6, caractérisé en ce, que le dispositif comprend une aide commandée d'allumage (12) reliée au convertisseur (1), et qui comprend seulement des composants à basse puissance, dans lequel c'est seulement une énergie auxiliaire, qui parcourt à travers l'aide commandée d'allumage (12).
  8. Dispositif selon une quelconque des revendications précédentes 6 ou 7, caractérisé en ce, que l'aide commandée d'allumage (12) produit une tension d'allumage additionnelle d'une superficie tension/temps à être donnée, qui est superposée à la tension d'alimentation bipolaire lors de l'allumage (B, D).
  9. Dispositif selon une quelconque des revendications précédentes 6, 7 ou 8, caractérisé en ce, que l'aide commandée d'allumage (12) comprend l'autre bobine d'allumage (32).
  10. Dispositif selon une quelconque des revendications précédentes 6, 7, 8 ou 9, caractérisé en ce, que l'aide commandée d'allumage (12) comprend un circuit de l'aide d'allumage (36), formé comme une disposition multiplicateur de tension, de préférence une disposition multiplicateur de tension double.
  11. Dispositif selon la revendication 10 précédente, caractérisé en ce, que le circuit de l'aide d'allumage (36) comprend au moins deux condensateurs (42, 43), des diodes (44, 45), un interrupteur de tension (41) et un interrupteur (47), et est formé de façon, que
    la tension d'allumage est produite par un chargement des au moins deux condensateurs (42, 43) aux potentiels de tension pour l'accumulation de l'énergie nécessaire pour l'allumage, les diodes (44, 45) étant reliées aux au moins deux condensateurs (42, 43) de manière, qu'au moins une duplication de tension est atteinte,
    et que, quand la tension de chargement excède le seuil de commutation de l'interrupteur de tension (41), ceci connecte, et elle est délivrée lors de la connexion à la bobine d'allumage (32) du transformateur (30), par lequel l'énergie d'allumage, avec une transformation à partir de la bobine d'allumage (32) vers l'élément de réactance (31), qui forme la bobine principale, est transformé en haut et est superposée à la tension d'alimentation bipolaire, par lequel la lampe UV (8) est allumée.
  12. Dispositif selon la revendication 11 précédente, caractérisé en ce, que l'aide commandée d'allumage (12) est activée pendant la phase d'allumage respectivement et est désactivée pendant la phase de service par l'interrupteur (47).
  13. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que pendant la phase de service (F-L) la fréquence et/ou de la valeur effective de la tension d'alimentation bipolaire est ajustée, la valeur effective de la tension d'alimentation bipolaire étant ajustée et/ou régulée par un ajustement de la largeur prédéterminée d'impulsion.
  14. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que le dispositif est formé de manière
    qu'un changement de la puissance de la lampe à une valeur stand-by peut être effectué pendant la phase de service (F-L), en augmentant la fréquence et en réduisant la tension d'alimentation bipolaire, sans que l'allumage de la lampe (8) s'éteint et celle-ci dût être allumer de nouveau, et qu'en suite la phase de service (F-L) est continuée avec la puissance de lampe antérieure par une réduction de la fréquence et par une augmentation de la tension d'alimentation bipolaire.
  15. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que la puissance de sortie peut présenter des valeurs, qui sont au-dedans de 0,5 à 30 kW, et des valeurs de courant, qui sont au-dedans de 1A à 60A.
  16. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que la tension d'alimentation bipolaire, pour le fonctionnement sans la tension additionnelle d'allumage, produit au moins une valeur au-dedans de la domaine de 10V à 1600V, de préférence dans la domaine de 10V à 500V.
  17. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que la fréquence présente des valeurs dans une domaine de 1 Hz à 100 kHz, de préférence dans une domaine de 1 Hz à 10 kHz.
  18. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que la tension d'allumage est plus grande de 800V, de préférence plus grande de 1000V.
  19. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que la tension d'allumage est sensiblement symétrique, de préférence sensiblement rectangulaire.
  20. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que l'unité de commande électronique (14) est une unité de commande par ordinateur ou une unité de commande par microordinateur ou une unité de commande SPS.
  21. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que les moyens de surveillance comprennent au moins un capteur.
  22. Dispositif selon la revendication 21, caractérisé en ce, que l'au moins un capteur comprend une sonde de température pour détecter la température de la lampe UV (8), et qui délivre un signal de mesure de température pour détecter le régime de service de la lampe UV (8) et/ou pour régler un dispositif de refroidissement de lampe.
  23. Dispositif selon la revendication 21, caractérisé en ce, que l'au moins un capteur comprend un capteur de détection d'émission pour détecter l'émission UV de la lampe UV (8), et qui délivre un signal de mesure d'émission pour détecter le régime de service de la lampe UV (8) et/ou pour régler un dispositif de refroidissement de lampe.
  24. Dispositif selon la revendication 21, caractérisé en ce, que l'au moins un capteur comprend un capteur de détection de la position du substrat à irradier et délivre un signal de mesure pour la synchronisation.
  25. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que l'unité de commande électronique (14) comprend un accouplement à bus de champ pour le fonctionnement de l'unité prioritaire de commande.
  26. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce, que des moyens pour la détermination du vieillissement de la lampe UV sont prévus, et que le dispositif est formé de façon, que la fréquence et/ou la valeur effective de la tension d'alimentation bipolaire sont rajustées en dépendance du vieillissement de la lampe UV (8) selon des valeurs à être données.
  27. L'utilisation d'un dispositif selon une quelconque des revendications précédentes pour cuire des matériaux à cuire par UV, comme des polymères, des laques ou des colles.
EP08101250A 2008-02-04 2008-02-04 Procédé de fonctionnement d'une lampe UV Not-in-force EP2088837B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT08101250T ATE511741T1 (de) 2008-02-04 2008-02-04 Verfahren zum betrieb einer uv-lampe
EP08101250A EP2088837B1 (fr) 2008-02-04 2008-02-04 Procédé de fonctionnement d'une lampe UV
ES08101250T ES2364440T3 (es) 2008-02-04 2008-02-04 Procedimiento para el funcionamiento de una lámpara uv.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08101250A EP2088837B1 (fr) 2008-02-04 2008-02-04 Procédé de fonctionnement d'une lampe UV

Publications (2)

Publication Number Publication Date
EP2088837A1 EP2088837A1 (fr) 2009-08-12
EP2088837B1 true EP2088837B1 (fr) 2011-06-01

Family

ID=39493243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08101250A Not-in-force EP2088837B1 (fr) 2008-02-04 2008-02-04 Procédé de fonctionnement d'une lampe UV

Country Status (3)

Country Link
EP (1) EP2088837B1 (fr)
AT (1) ATE511741T1 (fr)
ES (1) ES2364440T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015117206A1 (de) * 2015-10-08 2017-04-13 I.S.T. Innovative Sewer Technologies Gmbh Aushärtevorrichtung mit einer UV-Licht erzeugenden Lampe
DE102016124116A1 (de) 2016-12-12 2018-06-14 Sml Verwaltungs Gmbh Vorrichtung zur Ansteuerung einer Strahlungsquelle zum Aushärten von Auskleidungsschläuchen

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8900703A (nl) * 1989-03-22 1990-10-16 Nedap Nv Hoogfrequent voorschakelapparaat.
US5094010A (en) * 1990-07-05 1992-03-10 Amjo Infra-Red And Ultra-Violet Drying Systems, Inc. Vented ultraviolet drying system for drying fiberglass resins in boat hulls and decks
DE4039161C2 (de) 1990-12-07 2001-05-31 Zumtobel Ag Dornbirn System zur Steuerung der Helligkeit und des Betriebsverhaltens von Leuchtstofflampen
GB9116120D0 (en) 1991-07-25 1991-09-11 G E W Ec Ltd U.v.dryers
GB2274430B (en) 1993-01-08 1995-11-01 G E W Air-cooled UV dryers
DE4447779B4 (de) * 1993-11-30 2004-09-16 Koito Mfg. Co., Ltd. Schaltungsanordnung zum Starten und Betreiben einer Hochdruck-Entladungslampe für Fahrzeuge
JP3369004B2 (ja) 1994-09-02 2003-01-20 富士写真フイルム株式会社 カラー感熱プリンタ
DE19516052A1 (de) 1995-05-04 1996-11-14 Eta Plus Electronic Gmbh U Co Verfahren zum Betreiben einer Hochdruckgasentladungslampe und Schaltungsanordnung zur Durchführung des Verfahrens
JP3280540B2 (ja) * 1995-05-12 2002-05-13 株式会社小糸製作所 放電灯点灯回路
US6172468B1 (en) * 1997-01-14 2001-01-09 Metrolight Ltd. Method and apparatus for igniting a gas discharge lamp
US6628093B2 (en) 2001-04-06 2003-09-30 Carlile R. Stevens Power inverter for driving alternating current loads
EP1296541B1 (fr) * 2001-09-10 2006-11-15 Uviterno AG Dispositif et méthode de production de rayons UV
DE102005058222A1 (de) * 2005-12-06 2007-06-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zur Fehlerdetektion beim Betrieb von Hochdruckentladungslampen an EVGs
GB2437755A (en) * 2006-05-02 2007-11-07 Koen Geirnaert Controlling gas discharge lamps
EP2080423A1 (fr) 2006-11-07 2009-07-22 Pantec Engineering AG Procédé de fonctionnement d'une lampe à uv

Also Published As

Publication number Publication date
EP2088837A1 (fr) 2009-08-12
ATE511741T1 (de) 2011-06-15
ES2364440T3 (es) 2011-09-02

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