WO2000030241A1 - Spannungsumschaltvorrichtung - Google Patents
Spannungsumschaltvorrichtung Download PDFInfo
- Publication number
- WO2000030241A1 WO2000030241A1 PCT/AT1999/000263 AT9900263W WO0030241A1 WO 2000030241 A1 WO2000030241 A1 WO 2000030241A1 AT 9900263 W AT9900263 W AT 9900263W WO 0030241 A1 WO0030241 A1 WO 0030241A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switching device
- voltage
- line
- converter
- positive
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0294—Transport carriages or vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
- B23K9/1333—Dereeling means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
Definitions
- the invention relates to a voltage switching device as described in the preamble of claim 1.
- a voltage switching device which has a positive and a negative output connection three-phase bridge, in particular an energy source and with two step-up converters, one of which is between a common line section and the positive output connection and the second is connected between the common line section and the negative output connection such that the two output voltages of the step-up converter, in particular of the two storage elements arranged in the step-up converter, add up to the output voltage.
- the two step-up converters are designed such that the individual storage elements are connected to one another directly via a line.
- the switching elements are arranged parallel to the storage elements and are connected together at the center of the switching elements connected in series with one another with the center of the storage elements.
- the disadvantage here is that the direct connection of the two memory elements creates a capacitive center.
- a voltage switching device which has two symmetrical circuit halves with voltage doubling circuits with switching options formed by an input mains voltage changeover switch for the two operating cases and two mutually essentially mirror-symmetrically designed step-up converters, each in one of the two symmetrical circuit halves of the voltage doubling circuit are arranged. It is again disadvantageous here that the two storage elements of the step-up converters are connected directly to one another and thus in turn a capacitive center is formed.
- Voltage switching devices are already known which are used for the control of power switching power supplies.
- the voltage switchover device is designed in such a way that a separate switching group is arranged for each possible voltage level, in particular for 230 V and 400 V voltage networks, with a switchover to the corresponding switching group if the voltage level supplied is evaluated accordingly.
- the individual switching groups consist, for example, of a line rectifier and a storage element.
- the individual switching groups arranged for the different voltage levels are connected in parallel with one another, a corresponding switching group being activated via a corresponding switching device.
- the disadvantage here is that the individual switching groups must be dimensioned independently of one another, so that the use of different components means that the costs of such a voltage switching device are relatively high.
- the present invention has for its object to provide a voltage changeover device in which switching from an energy source with a corresponding voltage level to a further energy source with a different voltage level is made possible in a simple form.
- step-up converters makes it possible to symmetrize the energy flow to the storage elements by regulating the step-up converters, thereby preventing an asymmetrical supply of the downstream high-frequency inverter in a simple form.
- step-up converter in the voltage switching device means that a capacitive center of voltage, which is brought about by a parallel or series connection of the memory elements, is not necessary.
- Figure 1 shows a schematic structure of a welding device in a simplified representation.
- Fig. 2 is a block diagram of a voltage switching device according to the invention in a simplified representation.
- Fig. 1 is a welding device 1 for various welding processes, such as MIG / MAG welding or TIG welding or electrode welding processes, shown.
- the welding device 1 comprises a current source 2 with a power unit 3, a control device 4 and a switchover element 5 assigned to the power unit 3 or the control device 4.
- the switchover element 5 or the control device 4 is provided with a
- Control valve 6 connected, which is arranged in a supply line 7 for a gas 8, in particular a protective gas, such as CO, helium or argon and the like, between a gas reservoir 9 and a welding torch 10.
- a gas 8 in particular a protective gas, such as CO, helium or argon and the like, between a gas reservoir 9 and a welding torch 10.
- a wire feed device 11 which is common for MIG / MAG welding, can also be controlled via the control device 4, a welding wire 13 being fed from a supply drum 14 into the area of the welding torch 10 via a supply line 12.
- the current for establishing an arc 15 between the welding wire 13 and a workpiece 16 is fed via a supply line 17 from the power section 3 of the power source 2 to the welding torch 10 or the welding wire 13, the workpiece 16 to be welded likewise being fed via a further supply line 18 is connected to the welding device 1 and thus a circuit can be set up via the arc 15.
- the welding torch 10 can be connected to a water tank 21 via a cooling circuit 19 with the interposition of a flow monitor 20, so that when the welding torch 10 is started up, the cooling circuit 19 can be started by the control device 4 and thus cooling of the welding torch 10 or the welding wire 13 is effected.
- the welding device 1 has an input and / or output device 22, via which the most varied welding parameters or operating modes of the welding device 1 can be set.
- the welding parameters set via the input and / or output device 22 are forwarded to the control device 4 and the individual components of the welding device 1 are then controlled by the latter.
- the welding torch 10 is not connected to the individual components, in particular the welding device 1 or the wire feed device 11, via individual lines, but rather that these individual lines are combined in a common hose package are and this is connected to the welding torch 10 and the welding machine.
- FIG. 2 shows a block diagram of a voltage switching device 23 for the welding device 1.
- the voltage switching device 23 can of course be used for any electrical or electronic device or control.
- the voltage switching device 23 has the task of determining the voltage supplied by an energy source 24, in particular the level of the voltage, and a corresponding constant voltage to a consumer 25, such as, for example
- the power section 3 can be connected to different energy sources 24 with different voltages, in particular input voltages.
- the voltage switching device 23 has a mains rectifier 26, which is connected via mains connection lines 27 to 29 to the energy source 24, which is formed, for example, by a public supply network. It is now achieved by the line rectifier 26 that the energy supplied by the energy source 24, in particular an AC voltage, is converted into a rectified energy, in particular a DC voltage, with a positive supply line 30 at the outputs of the line rectifier 26 the positive potential of the DC voltage is present, and a negative supply line 31, to which the negative potential of the DC voltage is present, is connected.
- a line evaluation device is provided in series with the line rectifier 26. direction 32 arranged.
- the network evaluation device 32 has the function of determining the energy supplied by the network rectifier 26 into the positive / negative supply line 30, 31, in particular the level of the voltage supplied, and then via a control line 33 connected to the output of the network evaluation device 32 to the control device 4 of the Forward welding device 1.
- the network evaluation device 32 is connected upstream of the network rectifier 26, so that the level of the input voltage from the energy source 24 can be determined in the AC voltage circuit between the energy source 24 and the network rectifier 26.
- the voltage switching device 23 has at least two step-up converters 34, 35, a step-up converter 34, 35 being arranged in the positive and negative supply lines 30, 31 of the line rectifier 26, i.e. that at least one input or output of the step-up converter 34, 35 is connected to the positive or negative supply lines 30, 31.
- the two step-up converters 34, 35 are then connected together with a high-frequency inverter 36, 37, the high-frequency inverters 36, 37 each being connected to a primary winding 38, 39 of a transformer 40.
- the high-frequency inverters 36, 37 can be formed, for example, from a full bridge, half bridge, etc., for example when a full bridge is used, it is constructed from a plurality of switching elements, in particular from transistors, as are known from the prior art.
- the control of the individual switching elements or the high-frequency inverter takes place in such a way that the individual inputs of the switching elements are connected to the control device 4 via a control line 41.
- the function of the individual high-frequency inverters 36, 37 is not discussed in detail, since any method for controlling, for example, a full bridge, in particular high-frequency inverters 36, 37, can be used.
- control device 4 controls the individual switching elements in pairs via the control line 41, so that a so-called AC voltage is applied to the primary windings 38, 39 via the high-frequency inverters 36, 37.
- This is necessary insofar as the energy supplied is converted by the mains rectifier 26 into a direct voltage, so that this direct voltage is in turn converted into an alternating voltage, in particular into a square-wave voltage, so that the individual due to the change in current flow, in particular through the alternating voltage or square-wave voltage Primary windings 38, 39 an energy Transmission to the secondary side of the transformer 40 is made possible and thus an energy supply is possible for the consumer 25 through a secondary winding 42 arranged on the secondary side.
- This energy transmission via the transformer 40 is advantageous in that it galvanically isolates the consumer 25 from the voltage switching device 23 or the energy source 24.
- the consumer 25 can be formed from any consumer 25 known from the prior art, such as, for example, a computer, a battery charger, a solar system, a PLC control, a power source etc., a resistor 25 being shown schematically as a consumer, which is connected to the secondary winding 42, for example via a center point circuit with a two-way rectifier circuit.
- step-up converter 34, 35 used is configured in the voltage switching device 23, it is in turn possible that any step-up converter 34, 35 known from the prior art can be used. Of course, it is also possible that each tax or tax known for the individual step-up converter 34, 35. Control methods can be used by the control device 4 or carried out by the latter. In the illustrated embodiment, the two
- Step-up converter 34, 35 each made up of a choke 43, 44, a switching element 45, 46, in particular a transistor 47, a diode 48, 49 and a memory element 50, 51, in particular a capacitor 52, 53.
- the two step-up converters 34, 35 have a positive line 54, 55 and a negative line 56, 57, the chokes 43, 44 and the diodes 48, 49 being arranged in series in the positive line 54, 55.
- the switching element 45, 46 is connected to the positive and negative lines 54, 56 and 55, 57, respectively, whereby the positive and negative lines 54 to are activated by activating the switching elements 45, 46 57 can be connected to one another via the switching element 45, 46 or short-circuited.
- the memory elements 50, 51 are arranged parallel to the switching elements 45, 46 with the interposition of the diodes 48, 49, the memory elements 50, 51 in turn being connected to the positive and negative lines 54 to 57.
- step-up converter 34, 35 forms a short circuit between the positive and negative lines 54 to 57 by activating the switching elements 45, 46, whereby energy is stored in the chokes 43, 44, which is then deactivated when the switching elements 45, 46 are deactivated the diodes 48, 49 to the storage element 50, 51 or via the transformer 40 to the consumer 25.
- the two step-up converters 34, 35 are arranged in the voltage switching device 23 such that the choke 43 of the step-up converter 34 is connected to the positive supply line 30, whereas the choke 44 of the further step-up converter 35 is connected via a connecting line 58 to an input of a switching device
- the switching elements 45, 46 in particular their inputs, are connected to the control device 4 via a control line 61.
- a control device for switching elements 45, 46 which counts according to the prior art, can be arranged in front of the switching elements 45, 46 and converts the supplied signal into a corresponding signal for the switching element 45, 46.
- the two inputs of the switching elements 45, 46 or the control device can be connected to one another, these inputs then being connected to the control device 4 via the control line 61.
- This interconnection of the two switching elements 45, 46 ensures that the two step-up converters 34, 35 run in parallel.
- the individual switching elements 45, 46 can each be connected to the control device 4 via their own control line 61, as a result of which the individual step-up converters 34, 35 can be controlled or regulated independently of one another.
- the switching device 59 connected to the step-up converters 34, 35 is arranged parallel to the line rectifier 26, ie that via further inputs of the switching device 59 these are connected via further connecting lines 62, 63 to the positive and negative supply lines 30, 31 of the line rectifier 26, ie that now the switching device 59 is arranged parallel to the mains rectifier 26 in the voltage switching device 23 and at the same time via the connecting lines 58 and 60 is interconnected with the step-up converters 34, 35.
- a control input of the switching device 59 is connected to the control device 4 via a control line 64.
- the control device 4 has the possibility that a wide variety of switching states of the switching device 59 can be caused by sending out a control signal via the control line 64. These switching states are represented in the switching device 59 by dashed lines and by solid lines. It is possible that the switching device 59 by a relay or by electronic components such as transistors, etc. can be built up, but it must be ensured that the different switching states can be established. Furthermore, it is possible for the control device 4 to carry out the control device 4 directly via the network evaluation device 32, i.e.
- the network evaluation device 32 is connected to the control input of the switching device 59, so that a corresponding state is produced in the switching device 59 on the basis of a control signal from the network evaluation device 32.
- the individual states of the switching device 59 are then discussed in more detail in the functional description of the voltage switching device 23.
- charging resistors 65, 66 are arranged in series in the positive and negative supply lines 30, 31 from the line rectifier 26 to the step-up converters 34, 35.
- the arrangement or the interposition of the charging resistors 65, 66 when the voltage switching device 23 is activated for the first time is necessary because the two storage elements 50, 51 generate a short circuit between the positive and negative lines 54 to 57, but this is avoided by the charging resistors 65, 66 will, ie that by activating the voltage switchover device 23, that is to say by applying an operating voltage, the storage elements 50, 51, which form the intermediate circuit capacitor, form a short circuit between the two lines 54, 56 and 55, 57, as a result of which a considerable current draw from the energy source 24 occurs would.
- the charging resistors 65, 66 are now arranged in the positive and negative supply lines 30, 31. Another advantage The arrangement of the charging resistors 65, 66 lies in the fact that a constant current consumption from the energy source 24 is thus achieved and thus a more gentle charging cycle can be carried out for the individual storage elements 50, 51.
- a bypass switching element 67, 68 is arranged in parallel with the charging resistors 65, 66.
- the bridging switching element 67, 68 has the task of switching the charging resistors 65, 66 by short-circuiting the charging resistors 65, 66 from the circuit after a presettable time period or after reaching a corresponding charge of the storage elements 50, 51.
- the bypass switching elements 67, 68 are connected to the control device 4 via control lines 69, 70.
- the bypass switching elements 67, 68 can be formed, for example, from an electronically controlled make or break contact, a relay, or other switching elements, such as a transistor.
- the charging resistors 65, 66 can be switched on and off in such a way that when the voltage switching device 23 is put into operation, that is to say when an operating voltage is applied, the charging resistors 65, 66 are already switched into the circuit by using an electronically controlled closer.
- the energy supplied by the energy source 24 is converted by the mains rectifier 26 into a direct voltage, which is then applied to the positive and negative supply lines 30, 31 and is thus supplied to the step-up converters 34, 35 by the charging resistors 65, 66. If, however, an opener is used in the voltage changeover device 23 as the bypass switching element 67, 68, the control device 4 must be sent out via the control lines 69, 70 during commissioning, so that the bypass switching elements 67, 68 are opened and thus the short circuit via the Charging resistors 65, 66 is lifted.
- Control device 4 for example a time function, i.e. that after this presettable time function, in particular the duration, the control device 4 sends a signal to the control lines 69, 70, as a result of which the bypass switching elements 67, 68 are closed and thus the charging resistors 65, 66 are short-circuited.
- the user can, for example, supply the welding device 1 with energy by arranging a switch.
- an alternating voltage is supplied from the energy source 24 to the mains rectifier 26.
- the arrangement of the voltage switching device 23 makes it possible for the user to connect such a device to a wide variety of energy sources 24 with a wide variety of output voltages, i.e. that this device, in particular the welding device 1, can be connected to an energy source 24 with a voltage level of, for example, 220 V - three-phase network - or to an energy source 24 with a voltage level of, for example, 400 V - three-phase network.
- this device in particular the welding device 1
- the user does not have to make any settings or adaptations as are known from the prior art, since the voltage switchover device 23 automatically adjusts to the different input voltages, in particular to 220 V or 400 V.
- the supplied AC voltage is converted by the mains rectifier 26 into a DC voltage.
- the line rectifier 26 is dimensioned such that both an input voltage of, for example, 220 V and an input voltage of, for example, 400 V can be connected.
- the design of the mains rectifier 26 can take place as desired, i.e. that both a bridge rectifier and individual diodes can be used to convert the AC voltage to a DC voltage.
- the line rectifier 26, for example supplies the individual components arranged in the device, in particular in the welding device 1, with energy, i.e. that both the control device 4 and any other components are supplied with an operating voltage of, for example, 5 - 12 V, which is required for them. This can be done by parallel to the mains rectifier 26 and / or parallel to the
- Storage elements 50, 51 in particular the intermediate circuit capacitor, a power supply unit known from the prior art for supplying electronic components is connected, as a result of which the energy supplied can be converted into an operating voltage for the components.
- the bridging switching elements 67, 68 As a make contact, it is impossible for the memory elements 50, 51 to cause a short circuit when the Voltage switching device 23 is formed because the charging resistors 65, 66, as described above, are connected to the circuit. Simultaneously with the activation of the voltage switching device 23, the level of the DC voltage supplied by the line rectifier 26 is determined by the network evaluation device 32, so that a signal is sent to the control device 4 via the control line 33 in accordance with the determined or determined level of the DC voltage.
- the control device 4 it is possible here that, for example, at a voltage level which corresponds to an input voltage of 220 V, no signal is sent to the control device 4 via the control line 33, as a result of which the latter can recognize that an input voltage of 220 V is occurring.
- the network evaluation device 32 sends a signal to the control device 4. This makes it possible for the control device 4 to recognize or evaluate a wide variety of input voltages from the energy source 24.
- the voltage switching device 23 can be designed for several different energy sources 24, such as a 110 V network, 220 V network or a 400 V network, the different input voltages or networks being communicated to the control device 4 by different signals.
- the switching device 59 is designed in such a way that in the rest position, that is to say when the switching device 59 is not activated, the switching state for the higher input voltage, in particular the position shown in full lines, is set and thus the Charging cycle when activating the voltage switching device 23 takes place at least over a short period of time via the switching state for the higher input voltage, ie that the two memory elements 50, 51 are connected in series by the switching device 59.
- the switching device 59 On the basis of the supplied signal from the network evaluation device 32, the switching device 59 is controlled accordingly by the control device 4, i.e. that the switching device 59 establishes a corresponding switching state on the basis of the transmitted signal. For this purpose, the switching device 59 sets the switching state shown in dashed lines for a 220 V network, whereas the switching device 59 produces or maintains the switching state drawn in full lines for a 400 V network.
- the functional sequence of the voltage switching device 23 is then shown in Use of an energy source 24 with the voltage level of 220 V is described, ie that the switching state shown in dashed lines is produced or used in the switching device 59 after the input voltage has been determined.
- the control device 4 starts a presettable time period.
- This time period can be formed by an external timer or by a software program.
- the charging cycle for the memory elements 50, 51 takes place via the charging resistors 65, 66.
- the switching state change in the switching device 59 that is to say by the switching state shown in broken lines, two memory elements 50, 51 loaded in parallel.
- a separate circuit is formed between the network rectifier 26 and the individual storage elements 50 and 51, with at least one charging resistor 65, 66 being arranged in each circuit.
- the circuit for the storage element 50 is formed from the line rectifier 26 via the charging resistor 65, the choke 43, the diode 48 to the storage element 50 and from there via the connecting line 60, the switching device 59, the further connecting line 63 to the line rectifier 26.
- the further circuit for the memory element 51 is formed by the mains rectifier 26 via the connecting line 62, the switching device
- the charging cycle for the memory elements 50, 51 can be carried out via the switching state for the higher input voltage, the control device 4 only actuating the switching device 59 after the preset time has elapsed, so that the switching state of the switching device 59 is adapted to the Input voltage is carried out. It is thereby achieved that the two storage elements 50, 51 are connected in series with one another and thus only one circuit for both storage elements 50, 51 is set up in the voltage switching device 23.
- a monitoring device can be arranged in the voltage switching device 23, which monitors the charging cycle for the memory elements 50, 51, so that when a set target value is reached, a signal from this monitoring device to the control device 4 for loading end of the charging cycle is sent.
- the control device 4 After the time period for the charging cycle has expired, the control device 4 starts a further presettable safety time period. At the same time or during the safety period, the two bypass switching elements 67, 68 are actuated by the control device 4, so that the charging resistors 65, 66 are short-circuited and are therefore switched out of the circuit of the mains rectifier 26.
- the safety period ensures that the bridging switching elements 67, 68 are closed before the activation of the two step-up converters 34, 35, so that destruction of the charging resistors 65, 66 by increased current consumption is prevented.
- the safety period advantageously means that the charging resistors 65, 66 can be dimensioned small and thus costs can be saved. It is of course possible that by overdimensioning the charging resistors 65, 66, this safety period need not be included in the control process.
- the switching device 59 activates the two step-up converters 34, 35 arranged in the voltage switchover device 23.
- the principle of the step-up converter 34, 35 corresponds to a method known from the prior art, i.e. that a short circuit between the positive and negative lines 54, 56 and 55, 57 of the step-up converter 34, 35 is created by activating the switching elements 45, 46 arranged in the step-up converter 34, 35.
- a circuit is formed with the line rectifier 26 via the individual step-up converters 34, 35.
- the independent circuits of the two step-up converters 34, 35 are formed because they are connected in parallel to the line rectifier 26 via the switching device 59.
- the circuit for the step-up converter 34 is formed via the bypass switching element 67, the inductor 43, the switching element 45 to the negative line 56 and from there via the switching device 59, the connecting line 63 to the negative supply line 31 and thus to the mains rectifier 26.
- the further circuit constructed for the step-up converter 35 is formed starting from the line rectifier 26 via the connecting line 62, the switching device 59 and from this via the connecting line 58, the choke 44, the switching element 46 to the negative supply line 31 and thus to the line rectifier 26.
- Energy is stored in the chokes 43, 44 by the two independent circuits, so that after the switching elements 45, 46 are deactivated, this stored energy is generated via the Diodes 48, 49 can flow to the memory elements 50, 51.
- the control device 4 Since the control device 4 has not yet activated the two high-frequency inverters 36, 37, no energy is supplied to the transformer 40, so that the storage elements 50, 51 can be precharged by the energy stored in the chokes 43, 44. This process with the activation or short-circuiting of the individual step-up converters 34, 35 via the switching elements 45, 46 is continued by the control device 4 until a corresponding precharging of the storage elements 50, 51 is achieved.
- the two high-frequency inverters 36, 37 it is possible for the two high-frequency inverters 36, 37 to also be activated by the control device 4 simultaneously with the activation of the step-up converter 34, 35, as a result of which an immediate energy transfer to the consumer 25 takes place.
- the high-frequency inverters 36, 37 are formed, for example, from a full bridge, which is part of the prior art, with corresponding switching elements 45, 46, it is possible for the primary windings 38, 39 of the transformer 40 to be supplied by controlling the high-frequency inverters 36, 37 via the control line 41 is carried out with energy from the step-up converters 34, 35.
- the high-frequency inverters 36, 37 ensure that an alternating voltage is applied to the primary windings 38, 39 by driving the individual switching elements 45, 46 arranged in the high-frequency inverter 36, 37, i.e. that the DC voltage supplied by the step-up converters 34, 35, in particular by the storage elements 50, 51, is chopped in such a way that an AC voltage, in particular a square-wave voltage, is formed.
- the consumer 25 is connected to the secondary winding 42 and which must be supplied with a DC voltage.
- the secondary winding 42 it is possible, as shown schematically, to set up a center circuit with the secondary winding 42, so that the transmitted AC voltage, in particular the square-wave voltage, is in turn converted into a DC voltage and the consumer 25 therefore has a corresponding rectified energy available.
- the welding torch 10 is connected to the secondary winding 42, i.e. that by supplying the welding torch 10 with energy from the voltage switching device 23, the arc 15 can be set up for a welding process. Furthermore, it is possible for any consumer 25 or any rectifier circuit belonging to the prior art to be connected to the secondary winding 42.
- control device 4 controls the step-up converters 34, 35 and the high-frequency inverters 36, 37, in particular their switching elements 45, 46, via the individual control lines 61, 41, as described above is.
- the two step-up converters 34, 35 are operated in parallel with one another, so that a constant, synchronized energy flow can be generated for the primary winding 38 as well as for the primary winding 39. This is achieved insofar as the individual switching elements 45, 46 or the control device of the step-up converters 34, 35 are controlled via a common control line 61, which means that the step-up converters 34, 35 are synchronized in parallel and are therefore the same on the memory elements 50, 51 Amount of energy is available.
- the chokes 43, 44 can be magnetically coupled via a common core.
- the individual chokes 43, 44 can each have their own core.
- the device in particular the welding device 1, with the voltage switching device 23 arranged therein is now connected to another energy source 24, in particular to an energy source 24 with an output voltage of 400 V, as described above, when the device is activated, it is first again the loading resistors 65, 66 integrated in the circuit of the rectifier 26.
- a signal can be sent from the line evaluation device 32 to the control device 4.
- the control device 4 can now recognize on the basis of this signal that the voltage switchover device 23 is connected to an energy source 24 with an output voltage of, for example, 400 V, so that the control device 4 now does not initiate a change in the switching state of the switching device 59.
- the switching device 59 maintains the switching state, in particular the switching state shown in full lines. This ensures that now the two
- Step-up converters 34, 35 are no longer interconnected via the connecting line 62, 63 with the positive and negative supply lines 30, 31 of the mains rectifier 26, but that the two step-up converters 34, 35 are connected to one another in series via the connecting lines 60, 58 with the switching device 59 interposed be switched.
- the two step-up converters 34, 35 are connected in series in such a way that the negative line 56 of the step-up converter 34 is coupled to the positive line 55 of the step-up converter 35 via the switching device 59 and the connecting line 58.
- the charging cycle for the storage elements 50, 51 is carried out, for example, when the voltage switching device 23 is activated with an input voltage of, for example, 400 V, as described above, but due to the basic setting used, that is to say the switching position corresponding to the full lines, the charging of the storage elements 50, 51 is carried out by only one circuit, since the two storage elements 50, 51 are connected in series. It is thereby achieved that the supplied DC voltage is divided between the two storage elements 50, 51 and thus again the same state of charge is formed as with the parallel charging of the storage elements 50, 51.
- the two charging resistors 65, 66 are arranged in the charging cycle for the two storage elements 50, 51.
- the two switching elements 45, 46 of the step-up converter 34, 35 and / or the switching elements of the high-frequency inverter 36, 37 are activated by the control device 4, so that again a short circuit in the individual step-up converters 34, 35 is produced between their positive and negative lines 54, 56 and 55, 57.
- the voltage changeover device 23 since the two step-up converters 34, 35 are now connected to one another in series, the voltage changeover device 23 only more a circuit via the two step-up converters 34, 35 with the mains rectifier 26.
- This circuit forms from the line rectifier 26 via the bypass switching element 67, the choke 43, the switching element 45 to the switching device 59 and from this via the choke 44, the switching element 46, the negative supply line 31, the bypass switching element 68 to the line rectifier 26.
- this output voltage or the amount of energy supplied is divided into the two chokes 43, 44.
- the divided, stored energy is in turn supplied by the chokes 43, 44 via the diodes 48, 49 to the storage elements 50, 51.
- the control when using an energy source 24 of 400 V is carried out as before for the functional sequence with an energy source 24 of 220 V, i.e.
- the main advantage of such a voltage switchover device 23 is that by connecting the two step-up converters 34, 35 in series, the increased energy supplied by the mains rectifier 26 is halved and thus the same amount of energy or voltage level is again available on the storage elements 50, 51 as it is produced using such a voltage switching device 23 for a voltage network with a low output voltage of 220 V. It is thereby achieved that the components arranged downstream of the storage elements 50, 51, such as the high-frequency inverters 36, 37, the transformer 40 and the components arranged on the secondary side of the transformer 40, in particular the consumer 25, only for a voltage network of For example, 220 V must be dimensioned and thus an oversizing of the components, which are associated with considerable costs, can be prevented.
- Such a voltage changeover device 23 ensures that no capacitive tive center of voltage is created because the memory elements 50, 51, in particular the capacitors 52, 53, are in each case symmetrized via the regulation of the step-up converter 34, 35.
- the storage elements arranged therein, in particular the intermediate circuit capacitors, for the most varied input voltages of the energy sources 24 are connected directly in parallel or in series with one another, so that the high-frequency inverter 36, 37 connected thereafter is connected to a capacitive center of voltage. This capacitive center of voltage is prevented with the solution according to the invention.
- the regulation of the two high-frequency inverters 36, 37 is of particular importance so that symmetrical operation of the memory elements 50, 51, in particular the so-called intermediate circuit capacitors, is ensured in the voltage switching device 23 according to the invention.
- the two high-frequency inverters 36, 37 can be controlled or regulated independently of one another by the control device 4, so that a power shift or an asymmetrical energy consumption can be prevented.
- the design of the transformer 40 has an influence on the symmetrization of the memory elements 50, 51.
- two magnetically independent transformers 40 which are connected in parallel on the secondary side, or, as shown, a transformer 40 with two coupled primary windings 38, 39 be used.
- the two chokes 43, 44 of the step-up converter 34, 35 can either be separately or magnetically coupled via a common core.
- the switching device 59 can be formed by plug-in contact systems known from the prior art, as a result of which the user of such a device, in particular the welding device 1, must manually establish a corresponding switching state before starting up. It is also possible that such a voltage switching device 23 can also be used for single-phase networks.
- a symmetry aid 71 for supplying the two primary windings 38, 39 is arranged in the voltage switching device 23 according to the invention.
- the symmetry aid 71 is formed on the one hand by an RC element 72 and on the other hand by a symmetry transformer 73.
- the arrangement of the symmetry aids 71 is important in that a passive charge equalization between the two primary windings 38, 39 is achieved, that is to say that with different supply of the charge equalization, in particular half of the voltage difference, is effected for both primary windings 38, 39, so that the transformer 40, in particular the two primary windings 38, 39, are always supplied with energy symmetrically.
- the use of the RC element 72 serves to compensate for the small voltage differences when the voltage switching device is idling, in particular when the consumer 25 is not activated, by charging the capacitors of the RC elements 72.
- a separate RC element 72 is arranged between each line of one primary winding 38 and one line of the further primary winding 39.
- the further lines of the two primary windings 38, 39 are in turn connected to one another via such an RC element 72.
- the use of the further symmetry aid 71 serves to ensure that, in the event of higher current transmission or energy transmission via the transformer 40, energy compensation is carried out again, with the RC elements supporting the symmetry transformer 73 slightly for energy compensation .
- the symmetry transformer 73 has a symmetry winding 74, 75 for each primary winding 38, 39, which is magnetically coupled via a common core 76.
- one symmetry winding 74, 75 of the symmetry transformer 73 is connected in series to one of the two primary windings 38, 39, again taking into account the winding direction of the individual windings, in particular the primary windings 38, 39 and the symmetry windings 74, 75.
- symmetry windings 74, 75 of the symmetry transformer 73 have the same winding direction, for example a symmetry winding 74 must be arranged at the winding end of the primary winding 38 and the further symmetry winding 75 at the beginning of the winding of the primary winding 39 or vice versa. With different winding directions of the two symmetry windings 74, 75, it is possible that the two symmetry windings 74, 75 are each connected at the beginning or end of the winding of the primary windings 38, 39.
- the arrangement of the symmetry transformer 73 in turn ensures that an energy exchange is carried out between the two primary windings 38, 39 is, but now an energy exchange can be carried out with higher performance.
- half of the excess energy is transmitted to one of the two primary windings 38, 39 to the further primary winding 38, 39, which ensures that the transformer 40 can be operated symmetrically for a wide variety of powers.
- this symmetry aid 71 is only active in the case of larger power transmissions, that is to say that when the consumer 25 is supplied, that is to say not in an idle state, the energy compensation takes place through the symmetry transformer 73.
- a major advantage of the arrangement of the symmetry aids 71 is that the asymmetry supply to the primary windings 38, 39, which can occur due to component tolerances, is prevented by the symmetry aids 71.
- the arrangement of the symmetry aids 71 and the step-up converter 34, 35 also ensures that network fluctuations from the energy source 24 have no influence on the symmetry of the transformer 40.
- Another advantage of the voltage switching device 23 according to the invention is that an improvement in the power factor and a mains current consumption are reduced and at the same time the mains distortions or harmonics are reduced.
- control line power source 42 secondary winding power section 43 throttle control device 44 throttle switching element 45 switching element control valve 46 switching element supply line 47 transistor gas 48 diode gas storage device 49 diode welding torch 50 storage element wire feeder 51 storage element supply line 52 capacitor welding wire 53 capacitor supply drum 54 positive line arc 55 positive line workpiece 56 negative Line supply line 57 negative line supply line 58 connecting line cooling circuit 59 switching device flow monitor 60 connecting line water tank 61 control line input and / or output device 62 connecting line voltage switching device 63 connecting line energy source 64 control line consumer 65 charging resistor line rectifier 66 charging resistor line connection line 67 bypass switching element line connection line 68 bypass switching element line connection line 69 Control line positive supply line 70 Control line negative supply line 71 Symmetry aid for network evaluation device 72 RC link control line 73 Symmetry transformer step-up converter 74 Symmetry winding step-up converter 75 Symmetry winding high-frequency inverter 76 Core high-frequency inverter Primary winding Primary winding Transformer
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Dc-Dc Converters (AREA)
- Arc Welding Control (AREA)
- Rectifiers (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99953420A EP1142090B1 (de) | 1998-11-12 | 1999-11-04 | Spannungsumschaltvorrichtung |
US09/831,584 US6549441B1 (en) | 1998-11-12 | 1999-11-04 | Voltage switch-over device |
AT99953420T ATE259114T1 (de) | 1998-11-12 | 1999-11-04 | Spannungsumschaltvorrichtung |
JP2000583148A JP2002531043A (ja) | 1998-11-12 | 1999-11-04 | 電圧切換え装置 |
DE59908486T DE59908486D1 (de) | 1998-11-12 | 1999-11-04 | Spannungsumschaltvorrichtung |
CA002349611A CA2349611A1 (en) | 1998-11-12 | 1999-11-04 | Voltage switch-over device |
AU10181/00A AU1018100A (en) | 1998-11-12 | 1999-11-04 | Voltage switch-over device |
DK99953420T DK1142090T3 (da) | 1998-11-12 | 1999-11-04 | Spændingsomskifterapparat |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA1891/98 | 1998-11-12 | ||
AT0189198A AT406625B (de) | 1998-11-12 | 1998-11-12 | Spannungsumschaltvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000030241A1 true WO2000030241A1 (de) | 2000-05-25 |
Family
ID=3523253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1999/000263 WO2000030241A1 (de) | 1998-11-12 | 1999-11-04 | Spannungsumschaltvorrichtung |
Country Status (9)
Country | Link |
---|---|
US (1) | US6549441B1 (de) |
EP (1) | EP1142090B1 (de) |
JP (1) | JP2002531043A (de) |
AT (1) | AT406625B (de) |
AU (1) | AU1018100A (de) |
CA (1) | CA2349611A1 (de) |
DE (1) | DE59908486D1 (de) |
DK (1) | DK1142090T3 (de) |
WO (1) | WO2000030241A1 (de) |
Cited By (4)
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US6625046B2 (en) | 1998-07-09 | 2003-09-23 | Illinois Tool Works Inc. | Power convertor with low loss switching |
EP1357661A2 (de) * | 2002-04-26 | 2003-10-29 | Bombardier Transportation GmbH | Schaltungsanordnung zur veränderbaren Anlegung einer Eingangsspannung zu einer Schaltung |
US6865096B1 (en) | 1998-07-09 | 2005-03-08 | Illinois Tool Works Inc. | Power convertor with low loss switching |
WO2015036846A3 (en) * | 2013-09-12 | 2015-05-28 | Lincoln Global, Inc. | Alternative power for engine driven welder |
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DK174494B1 (da) * | 2001-01-26 | 2003-04-22 | American Power Conversion Denm | Kombineret AC-DC til DC konverter |
US7106607B2 (en) * | 2002-01-22 | 2006-09-12 | American Power Conversion Denmark Aps | Combined AC-DC to DC converter |
US6998573B2 (en) * | 2003-07-11 | 2006-02-14 | Lincoln Global, Inc. | Transformer module for a welder |
US7274000B2 (en) * | 2003-07-11 | 2007-09-25 | Lincoln Global, Inc. | Power source for high current welding |
US7573000B2 (en) | 2003-07-11 | 2009-08-11 | Lincoln Global, Inc. | Power source for plasma device |
JP3775419B2 (ja) * | 2004-02-13 | 2006-05-17 | 株式会社ニプロン | 電源回路 |
US7719865B2 (en) * | 2005-02-25 | 2010-05-18 | Mitsubishi Electric Corporation | Power conversion apparatus |
EP1914857B1 (de) * | 2006-10-21 | 2009-07-22 | SMA Solar Technology AG | Schaltungseinrichtung und Verfahren, insbesondere für Photovoltaik-Generatoren |
CN100403637C (zh) * | 2006-12-12 | 2008-07-16 | 浙江大学 | 无源箝位软开关高增益升压型交错并联变换器 |
US8385504B2 (en) * | 2008-03-06 | 2013-02-26 | Koninklijke Philips Electronics N.V. | DC/AC power inverter control unit of a resonant power converter circuit, in particular a DC/DC converter for use in a high-voltage generator circuitry of a modern computed tomography device or X-ray radiographic system |
US20120080943A1 (en) * | 2010-09-30 | 2012-04-05 | Astec International Limited | Photovoltaic Power Systems |
US10112251B2 (en) * | 2012-07-23 | 2018-10-30 | Illinois Tool Works Inc. | Method and apparatus for providing welding type power |
DE102012221687B4 (de) * | 2012-11-28 | 2021-10-07 | Albert-Ludwigs-Universität Freiburg | Spannungswandler-Vollbrücke mit geringer Anlaufspannung |
JP7028672B2 (ja) * | 2018-02-20 | 2022-03-02 | 株式会社三社電機製作所 | 電源装置 |
CN108750571B (zh) * | 2018-07-27 | 2020-07-17 | 广州成飞汽车夹具有限公司 | 一种多车型自动化生产线车型切换装置及方法 |
CN109921671B (zh) * | 2019-03-20 | 2020-09-04 | 中车青岛四方车辆研究所有限公司 | 单相逆变器并联控制方法、控制***及逆变器 |
US11607743B2 (en) * | 2019-12-23 | 2023-03-21 | Illinois Tool Works Inc. | Methods, systems, and apparatus for verifying a switched mode power supply topology |
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CN113751832B (zh) * | 2021-08-20 | 2024-03-22 | 深圳市佳士科技股份有限公司 | 电流方向切换电路、焊机驱动电路和焊机设备 |
CN117175748B (zh) * | 2023-10-30 | 2024-04-02 | 宁德时代新能源科技股份有限公司 | 电池状态参数均衡方法、储能单元、bms和存储介质 |
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1998
- 1998-11-12 AT AT0189198A patent/AT406625B/de not_active IP Right Cessation
-
1999
- 1999-11-04 EP EP99953420A patent/EP1142090B1/de not_active Revoked
- 1999-11-04 CA CA002349611A patent/CA2349611A1/en not_active Abandoned
- 1999-11-04 JP JP2000583148A patent/JP2002531043A/ja active Pending
- 1999-11-04 DK DK99953420T patent/DK1142090T3/da active
- 1999-11-04 AU AU10181/00A patent/AU1018100A/en not_active Abandoned
- 1999-11-04 US US09/831,584 patent/US6549441B1/en not_active Expired - Fee Related
- 1999-11-04 WO PCT/AT1999/000263 patent/WO2000030241A1/de not_active Application Discontinuation
- 1999-11-04 DE DE59908486T patent/DE59908486D1/de not_active Revoked
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US3846695A (en) * | 1973-05-07 | 1974-11-05 | Honeywell Inf Systems | Series-parallel dual switching regulator for use with a variety of line voltages |
US5272313A (en) * | 1991-10-18 | 1993-12-21 | Sansha Electric Manufacturing Co., Ltd. | Arc welder |
DE4430394A1 (de) * | 1994-08-26 | 1995-01-26 | Manfred Prof Dr Ing Gekeler | Dreiphasige Gleichrichterschaltung mit nahezu sinusförmigen Eingangsströmen und geregelter Ausgangs-Gleichspannung |
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Publication number | Priority date | Publication date | Assignee | Title |
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US6625046B2 (en) | 1998-07-09 | 2003-09-23 | Illinois Tool Works Inc. | Power convertor with low loss switching |
US6865096B1 (en) | 1998-07-09 | 2005-03-08 | Illinois Tool Works Inc. | Power convertor with low loss switching |
US7336512B2 (en) | 1998-07-09 | 2008-02-26 | Illinois Tool Works Inc. | Power convertor with low loss switching |
US7778056B2 (en) | 1998-07-09 | 2010-08-17 | Geissler Steven J | Power converter with low loss switching |
EP1357661A2 (de) * | 2002-04-26 | 2003-10-29 | Bombardier Transportation GmbH | Schaltungsanordnung zur veränderbaren Anlegung einer Eingangsspannung zu einer Schaltung |
EP1357661A3 (de) * | 2002-04-26 | 2005-07-13 | Bombardier Transportation GmbH | Schaltungsanordnung zur veränderbaren Anlegung einer Eingangsspannung zu einer Schaltung |
WO2015036846A3 (en) * | 2013-09-12 | 2015-05-28 | Lincoln Global, Inc. | Alternative power for engine driven welder |
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US10207350B2 (en) | 2013-09-12 | 2019-02-19 | Lincoln Global, Inc. | Alternative power for engine driven welder |
Also Published As
Publication number | Publication date |
---|---|
US6549441B1 (en) | 2003-04-15 |
CA2349611A1 (en) | 2000-05-25 |
DE59908486D1 (de) | 2004-03-11 |
EP1142090B1 (de) | 2004-02-04 |
DK1142090T3 (da) | 2004-05-10 |
ATA189198A (de) | 1999-11-15 |
JP2002531043A (ja) | 2002-09-17 |
EP1142090A1 (de) | 2001-10-10 |
AT406625B (de) | 2000-07-25 |
AU1018100A (en) | 2000-06-05 |
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