WO2016071240A1 - Système pour exposer des objets à des rayons uv - Google Patents

Système pour exposer des objets à des rayons uv Download PDF

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Publication number
WO2016071240A1
WO2016071240A1 PCT/EP2015/075316 EP2015075316W WO2016071240A1 WO 2016071240 A1 WO2016071240 A1 WO 2016071240A1 EP 2015075316 W EP2015075316 W EP 2015075316W WO 2016071240 A1 WO2016071240 A1 WO 2016071240A1
Authority
WO
WIPO (PCT)
Prior art keywords
ballast
voltage
gas discharge
discharge tube
radiation source
Prior art date
Application number
PCT/EP2015/075316
Other languages
German (de)
English (en)
Inventor
Robert Sänger
Peter Schwarz-Kiene
Thomas Kirschner
Original Assignee
Ist Metz Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ist Metz Gmbh filed Critical Ist Metz Gmbh
Publication of WO2016071240A1 publication Critical patent/WO2016071240A1/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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Definitions

  • the invention relates to a system for UV irradiation of objects, in particular for curing coatings, with a UV radiation source which can be aligned with an object to be irradiated and with an electronic ballast for supplying energy to the UV radiation source AC voltage with regulated supply current.
  • Such UV irradiation systems are known, above all in the printing industry, as curing systems for curing or drying inks and lacquers crosslinkable by UV radiation.
  • a gas discharge tube is operated as a UV radiation source by a special electronic ballast with suitable AC voltage, the ballast is usually housed in a cabinet and a two-wire power line with a length of up to about 50m with the built-in printing machine lamp unit connected is.
  • the gas discharge tubes have a high energy requirement and require a relatively complex temperature control and closure control.
  • UV LED units are used, which are supplied via a DC power supply with a DC voltage, with driver boards with current control for controlling individual LED arrays are used.
  • the energy transfer here typically takes place via multi-core low-voltage lines, which require correspondingly large conductor cross-sections due to high currents.
  • the invention is based on the idea to provide a standardized power supply for a single or combined operation of LED or gas discharge UV lamps. Accordingly, an adaptable via a connection cable to the ballast or connected fitting device is provided which contains a plurality of primary side connected in series and acted upon by the supply current transformers, each formed at least one secondary side connected to the transformers emitter strand of UV radiation emitting and serially connected semiconductor devices is.
  • This makes it possible to operate a radiator configuration consisting of semiconductors without costly retooling measures with a ballast designed for the operation of gas discharge tubes.
  • a printing operation with a flexible and short-term switchable selection of different radiation sources (gas discharge tube, LED), for example, order-dependent possible.
  • the current strengths in the connecting cable remain sufficiently low, so that no excessive conductor cross sections are required.
  • the supplied from the ballast to the transformer chain of the matching device constant current allows easy distribution and adjustment of the secondary side currents, without an elaborate control would be required at this point.
  • the voltage drop across the components simply adjusts according to their component characteristics, while the secondary current remains constant in accordance with the current transformation through the transformers.
  • the ballast is designed to provide an alternating voltage with a frequency in the range of 20-300 kHz, so that the energy transfer is optimized and also a direct operation of a gas discharge tube is possible.
  • a further improvement in this regard can be achieved in that the AC voltage is in the range of 100 to 3000 volts. The higher the voltage is selected, the lower the current and thus the cross section of the supply line can be kept.
  • the ballast has a controller for a choice of operation between the connection of a gas discharge tube or an adapter.
  • a gas discharge tube is provided as a (further) radiation source for irradiating an object, wherein the gas discharge tube can be connected directly to the ballast via the connection cable and thus operated.
  • the ballast is designed to provide an ignition voltage in a first time interval and then an operating voltage for a gas discharge tube, wherein the ignition voltage is higher than the operating voltage.
  • the ballast has a current regulator for outputting a constant supply current independent of the AC voltage.
  • connection cable has a common connector for selectively electrically connecting the ballast with the fitting device or with a gas discharge tube.
  • the output of the transformers via a rectifier, in particular a bridge rectifier with at least one connected downstream emitter, so that there flows a constant DC current through the serially connected components.
  • ballast has a resonant converter, and that at the input of the matching device serial and / or parallel reactive elements, in particular capacitors for frequency-dependent adjustment of the impedance curve are provided. It is also favorable if a DC inductance for smoothing the transformer output current is connected in series with an emitter line.
  • the DC inductance can be formed by a suitable winding structure of the transformer as a leakage inductance in a conventional manner.
  • each emitter line may have between 5 and 100 semiconductor devices connected in series as UV radiation source.
  • each emitter strand is operated with a constant current defined by the respective upstream transformer.
  • the phase currents may be identical or different in each line.
  • the semiconductor devices are formed as UV radiation emitting UV LEDs, Also conceivable is the use of UV VCSEL or UV laser diodes.
  • the adapter device has a detector for detecting an overvoltage and a switch, controlled by the detector and parallel to the emitter line, for a controlled short-circuit operation.
  • the invention is explained in more detail with reference to the exemplary embodiments shown schematically in the drawing. 1 shows a block diagram of a UV irradiation system for installation in a printing machine;
  • Fig. 2 is a circuit diagram of components of the system of Fig. 1; 3 is a circuit diagram of a further detailed system configuration.
  • the irradiation system 10 shown in the drawing enables the UV irradiation of objects that are transported through the irradiation area, in particular in the form of substrates coated with printing inks, varnishes or adhesives, for example in a printing press for chemical crosslinking or curing of the coating.
  • the irradiation system 10 comprises at least one UV radiation source 12 which can be aligned with the object to be irradiated or oriented thereon and an electronic ballast 14 for supplying energy to the respective UV radiation source 12, wherein UV radiation is emitted for the use of UV radiation Semiconductor arrays 16 a the ballast 14 downstream fitting device 18 is provided.
  • a plurality of ballasts 14 can be controlled via a programmable digital control device 20.
  • a controller board 22 is installed in the respective ballast 14.
  • the control device 20 is connected via a data bus 24 to a central controller 26 of the printing machine.
  • Each ballast 14 contains a supply unit 28, which is formed from electronic components and is connected via a connecting or connecting cable. at 30, the power supply of the UV radiation source 12 allows. Usually, the ballast 14 is disposed in a cabinet remote from the radiation source 12. In this case, an AC voltage in the range of 100 to 3000 volts with a frequency in the range of 20-300 kHz is provided via a two-phase connection.
  • a gas discharge tube 32 for generating the UV radiation in the radiation source 12 may be provided.
  • the gas discharge tube 32 can be connected via the connecting cable 30 directly to the ballast 14 shot and operated.
  • the connection cable 30 has a unitary connector 34 for optional electrical connection of the ballast 14 with an adapter 18 or with a gas discharge tube 32nd
  • the supply unit 28 is formed in the ballast 14 to provide an increased ignition voltage and then a lowered operating voltage in an initial ignition interval.
  • the supply unit 28 contains a current regulator 36, which ensures a constant supply current largely independent of the output AC voltage. When a gas discharge tube 32 is connected, this prevents the charge carrier density from increasing excessively and destroying the lamp.
  • I / O and measurement signals can also be transmitted via a data bus 38 between the ballast 14 and corresponding units 39 of the radiation source 12.
  • the operation can be done by the programmable digital controller 20.
  • 2 shows the switching principle of the matching device 18, which converts the AC voltage supplied via the connection cable 30 into a (pulsating) DC voltage adapted for each semiconductor array 16.
  • a chain of transformers 40 is connected in series with the respective primary-side winding 42.
  • the secondary-side winding 44 of each transformer 40 is connected via a bridge rectifier 46, each having a semiconductor array 16.
  • each semiconductor array 16 comprises at least one emitter strand 48, which is formed from UV radiation emitting and serially connected semiconductor devices 50.
  • An emitter strand 48 may have between 5 and 100 semiconductor devices 50, it being possible for a plurality of emitter strands 48 to be connected in parallel to a semiconductor array 16.
  • the semiconductor devices 50 are formed by UV-emitting UV LEDs. Also conceivable is the use of so-called UV-VCSELs (Vertical Cavity Surface Emitting Lasers) or of UV laser diodes.
  • a modular construction of individual transformers is also conceivable, with two or more individual transformers being connected in series on the primary side and secondary side to provide a composite transformer 40 for supplying at least one emitter line 48.
  • the ballast 14 provides via the connecting cable 30 a defined, regulated supply current Ip, which flows uniformly across the primary winding 42 of the transformers 40 and leads to a respective voltage drop Up1 ... Upn.
  • a constant secondary-side direct current Is1... Isn is then fed into the semiconductor arrays 16 via the rectifier 46.
  • the same or different secondary currents are possible.
  • the voltage Us1... Usn then drops at the respective emitter line 48. As illustrated in FIG.
  • the impedance curve can be adapted by connecting capacitors 52 at the input of the matching device 18 as dummy elements in series or parallel to the primary winding 42 are switched. It is also expedient if a direct current inductance 54 for smoothing the secondary-side current Is is connected in series with the emitter line 48.
  • the direct current inductance 54 can also be designed as a leakage inductance by means of a suitable winding construction of the transformer 40.
  • a detector 56 is provided in the matching device 18. This may have a voltage monitor 58 and an actuatable, parallel to the emitter line 48 switch 60 for a controlled short-circuit operation.

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  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un système pour exposer des objets à des rayons UV, comprenant une source de rayonnement UV (12) pouvant être orientée sur l'objet à exposer et un ballast électronique (14) destiné à l'alimentation en énergie de la source de rayonnement UV (12) par une tension alternative avec un courant d'alimentation régulé. Selon l'invention, un appareil d'adaptation (18) peut être raccordé au ballast (14) par le biais d'un câble de raccordement (30) et contient plusieurs transformateurs (40) branchés en série du côté primaire et alimentés par le courant d'alimentation, et il existe respectivement au moins une branche émettrice d'UV (48) raccordée au côté secondaire des transformateurs (40) et formée par des composants semi-conducteurs branchés en série.
PCT/EP2015/075316 2014-11-06 2015-10-30 Système pour exposer des objets à des rayons uv WO2016071240A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014222744.5A DE102014222744A1 (de) 2014-11-06 2014-11-06 System zur UV-Bestrahlung von Objekten
DE102014222744.5 2014-11-06

Publications (1)

Publication Number Publication Date
WO2016071240A1 true WO2016071240A1 (fr) 2016-05-12

Family

ID=54365252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/075316 WO2016071240A1 (fr) 2014-11-06 2015-10-30 Système pour exposer des objets à des rayons uv

Country Status (2)

Country Link
DE (1) DE102014222744A1 (fr)
WO (1) WO2016071240A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000012508A1 (it) * 2020-05-27 2021-11-27 High Power Equipment S R L Circuito di alimentazione per lampade a led e lampada a led comprendente detto circuito

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130285565A1 (en) * 2010-05-25 2013-10-31 Virginia Tech Intellectual Properties, Inc. Multi-Channel Two-Stage Controllable Constant Current Source and Illumination Source
US20140084799A1 (en) * 2012-09-24 2014-03-27 Samsung Electronics Co., Ltd. Light source driving device and illuminating apparatus using the same
US20140204571A1 (en) * 2013-01-24 2014-07-24 Cree, Inc. Led lighting apparatus for use with ac-output lighting ballasts
US20140265900A1 (en) * 2013-03-15 2014-09-18 Laurence P. Sadwick Fluorescent Lamp LED Replacement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130285565A1 (en) * 2010-05-25 2013-10-31 Virginia Tech Intellectual Properties, Inc. Multi-Channel Two-Stage Controllable Constant Current Source and Illumination Source
US20140084799A1 (en) * 2012-09-24 2014-03-27 Samsung Electronics Co., Ltd. Light source driving device and illuminating apparatus using the same
US20140204571A1 (en) * 2013-01-24 2014-07-24 Cree, Inc. Led lighting apparatus for use with ac-output lighting ballasts
US20140265900A1 (en) * 2013-03-15 2014-09-18 Laurence P. Sadwick Fluorescent Lamp LED Replacement

Also Published As

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DE102014222744A1 (de) 2016-05-12

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