WO1991018751A1 - Plaque adhesive a charge electrostatique - Google Patents

Plaque adhesive a charge electrostatique Download PDF

Info

Publication number
WO1991018751A1
WO1991018751A1 PCT/DE1991/000421 DE9100421W WO9118751A1 WO 1991018751 A1 WO1991018751 A1 WO 1991018751A1 DE 9100421 W DE9100421 W DE 9100421W WO 9118751 A1 WO9118751 A1 WO 9118751A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
conductor
adhesive plate
current
plate according
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.)
Ceased
Application number
PCT/DE1991/000421
Other languages
German (de)
English (en)
Inventor
Eberhard Schütt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1991018751A1 publication Critical patent/WO1991018751A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L5/00—Drawing boards
    • B43L5/02—Drawing boards having means for clamping sheets of paper thereto

Definitions

  • the invention relates to an electrostatically chargeable adhesive plate for holding sheets, foils or the like, in particular made of paper or plastic. According to the preamble of claim 1.
  • Adhesive plates of this type are used, for example, as writing and / or drawing plates, the drawing sheets, foils etc. to be fixed thereon being held by means of an electrostatic field which is generated in the adhesive plate.
  • a base plate which serves as a carrier for an electrostatically active cover plate attached thereto.
  • An electrically conductive meander in the form of correspondingly running conductor tracks is arranged between the cover plate and the base plate or in the cover plate. These are made of conductive varnish or paint, which is applied on the underside of the cover plate using the screen printing process.
  • the shape and course of the conductor tracks correspond to those on electrical circuit boards and are designed as a two-pole meander.
  • the insulation resistance between the two live meandering tracks is quite high. It can be assumed that the electrical equivalent circuit of the adhesive plate is an ideal open capacitor with a high resistance connected in parallel.
  • the power supply device provided in the known adhesive plates, which is connected to the meandering conductor tracks, transforms the alternating current supplied by the power network down in a network separating part and rectifies it. This low-voltage direct current is then converted into high-frequency alternating current, transformed up and further increased in voltage and rectified in a high-voltage cascade. The direct voltage generated in this way is then fed to the adhesive plate.
  • Adhesive plates are open on all sides with respect to the radiation of electrostatic fields. As a result, there is no protection against contact, so that the user of the adhesive plate inevitably receives an electric shock when it is touched if the adhesive plate is damaged, for example by improper sawing or drilling from the edge.
  • the secondary winding of the mains isolating part designed as a high-frequency high-voltage transformer and the subsequent high-voltage cascade are either not grounded at all or only on one side.
  • the high DC voltage applied to the meandering tracks of the cover plate generates such an electrostatic field that either radiates at full height against earth or due to the unpredictable smallest capacitive under- diffusion in its radiation against earth is indefinable, since the prevailing voltage relationships against earth are also not predictable or not definable. Corona effects and leakage currents in the microampere range are also involved in these undesirable instabilities.
  • the dielectric strength against earth and against unintentional contact for the full voltage including a safety value must be dimensioned for the two supply lines of the power supply device, the contacting in the plate and for the two meandering paths, although a supply line is required due to the indefinable stability , a contact in the adhesive plate and a meandering path can be temporarily at or near earth potential.
  • the energy conversion carried out in the power supply device from the mains alternating voltage to the high direct voltage generating the electrostatic field is very complex and generates considerable heat loss. It also proves to be very susceptible to interference, particularly in the high-frequency generator. In addition, due to the prevailing high frequency, there is considerable interference radiation, which can only be prevented by complex and therefore expensive shielding and filtering measures.
  • the invention is therefore based on the object of designing the electrostatically chargeable adhesive plate of the generic type in such a way that it works reliably and with little loss with the least possible dust attraction and interference radiation and is easy to handle and easy to manufacture.
  • the meander of the cover plate is designed as a three-wire system.
  • two live meandering tracks are provided, which are connected to the counter-polarized connections of a high-voltage cascade and between which a grounded meandering track runs as a central conductor, which divides the electrostatic field into two earth-symmetrically identical halves.
  • the meander formed in this way is surrounded by a grounded frame conductor, which is connected to the center conductor, to prevent lateral radiation of the electrostatic field.
  • the meander is surrounded by the framing conductor, which represents a grounded screen, it represents a closed system with all the advantages resulting from it, both electrically and in relation to the outwardly acting electrostatic field lines.
  • the entire power supply device is designed as a three-wire system from the electrostatic adhesive plate representing the consumer to the mains connection.
  • a solid protective conductor is looped through from the framing conductor and the middle conductor of the meander through the high-voltage cascade and a network separating part to the network connection.
  • the high-voltage cascade is rigidly grounded exactly in the middle and is electrically strictly earth-symmetrical.
  • Two real protective resistors are provided in the output of the high-voltage cascade. These are dimensioned such that the voltage drop across them is insignificant in the normal operating state. However, they limit any short-circuit and discharge currents of the capacitors of the high-voltage cascade to such an extent that the diodes of the cascade remain undamaged. In addition, in the event of a touch, they limit the short-circuit current to a non-hazardous level for humans, so that good protection against contact is provided.
  • a group of voltage limiting means such as varistors and the like, is also provided. These limit the high direct voltage of opposite polarity to earth to a set dimension in a completely earth-symmetrical manner.
  • the voltage-limiting resistors are basically real resistors because this is a pure DC voltage.
  • the mains transformer provided, as the mains isolating part, provides the galvanically required separation of the above-described secondary circuit from the primary circuit of the power supply device. Only the protective conductor is looped through the entire system.
  • the rough presetting of the secondary high voltage provided in the primary part according to the invention is, as far as it is done with reactors, almost completely free of power losses. This technique is energy saving.
  • the period of use in the case of so-called pin walls is extremely high and is also unusually large even in the case of drawing boards, so that considerable energy savings can be achieved.
  • Mains transformer which either forms a single winding or is divided into partial windings, is compensated for by the one or more capacitors to the pure active current in such a way that the entire magnetizing current of the mains transformer is in the basic position of the system, ie with the highest holding force setting. is fully compensated for by the capacitance of the capacitor or capacitors.
  • the operating current is thus restricted to the pure active current, which is composed of thermal iron losses in the iron core, purely ohm 1 see losses in the windings of the network transformer, pure active current delivery to the high-voltage cascade and active current consumption of a glow lamp with series resistors for the operating display.
  • the configuration is such that one or more NTC resistors, ie resistors with a negative temperature coefficient or thermistor, are provided. These limit the inrush current so strongly that only extremely low pre-fuses are required.
  • the reactive current compensation provided according to the invention thus reduces the operating current by more than half.
  • the damping of the inrush current makes it possible to use precautions which are only about a quarter to a fifth of the normal dimensioning.
  • the overall system is extremely high-impedance. Therefore, the high internal resistance of the adhesive plate, which fluctuates greatly due to manufacturing tolerances, has a considerable influence on the secondary high voltage.
  • series resistors are arranged in the primary circuit of the system. These are set so that the secondary high voltage on the meander of the adhesive plate reaches the dimension to be set.
  • This setting is basically the intended maximum voltage or the intended highest adhesive force. In this case, an intended resistance adjuster is either not connected, or it is in its off position, which represents the basic position for the highest adhesive force.
  • the series resistors can be real resistors and / or reactors. Which choice or execution is made in detail depends on the respective circumstances of the individual case. While the real resistors are cheap but very energy-consuming, the reactors are considerably more expensive, but they are extremely energy-saving. Regardless of what type of series resistor is used, these must be adapted very precisely to the overall system in the system's AC technology. With correct dimensioning, however, both the capacitive and the inductive reactive resistor are successfully used.
  • the resistance controller provided for reducing the adhesive force has in principle a similar electrical structure to the fixed series resistors described above. But there are two differences. The resistance value is adjustable, with part of the inductive resistance in the form of a current transformer taking the energy for operating the indicator glow lamp for reducing the adhesive force from the primary circuit.
  • the current of the glow lamp fluctuates only by about 30% as a result of the primary current converted by the converter. Added to this is the purely current-driving function by the current transformer, so that the luminance differences are only about 30%. Due to the purely current-driving function of the current transformer, the simultaneously lowered voltage has no influence on the luminosity of the glow lamp. This is therefore operated without a series resistor, so that the current transformer is closed off in itself.
  • Two mains fuses are arranged at the input of the power supply. As explained, these only have to be dimensioned for the pure active current of the operating system, so that the inrush current of the mains transformer does not have to be taken into account.
  • the AC mains current is supplied through protective contact plugs, the protective conductor being provided.
  • the entire system works purely analogously with the sinusoidal AC line voltage. Insofar as deformation of the sine curve of the AC alternating current is caused by inductive elements with an iron core due to magnetic saturation and hysteresis effects, this is soft in use. Therefore, no harmonics in the high-frequency range down to a few 100 Hertz have to be taken into account here.
  • the switch function of the diodes used likewise does not produce a high frequency at the pure mains frequency, so that no radiation or other interference radiation occurs.
  • the constructive design of the adhesive plate according to the invention is such that the base plate used consists of stable, torsion-free carrier material, for example wood or solid plastic, the electrically active cover plate or cover layer then being applied to this base plate, the underside being the as Three-conductor system trained meanders.
  • the electrostatically chargeable adhesive plate Due to the design of the electrostatically chargeable adhesive plate according to the invention, there are overall significant advantages. These are based, among other things, on the fact that the meander of the adhesive plate is surrounded by a grounded frame and that the two live meanders the tracks are separated by a third meander track arranged between them, which is grounded, earth-symmetrically, a protective conductor also being connected through from the mains connection to the meander of the plate.
  • the electrostatic field is completely shielded from all outer narrow sides of the adhesive plate because of the grounded frame of the meander.
  • the electrostatic field on the useful surface of the adhesive plate is divided into two earth-symmetrically identical halves, so that it does not protrude high above the plate surface. Because of the earth-symmetrical division, the electrostatic field does not act far into the ambient air, so that the attraction of dust from the ambient air is minimized. As a result, the cleaning effort for the adhesive plate is considerably reduced. Due to the earth-symmetrical voltage division, the protection against accidental contact is also simpler and safer, while the effort for the desired protection against accidental contact is considerably reduced due to the stabilization of the high voltage in the adhesive plate on two equal halves. This contributes to a not insignificant cost reduction.
  • the high-voltage generation according to the invention ensures very reliable operation with little technical effort.
  • the intended overcurrent limitation with short-circuit protection for the actual high-voltage cascade in connection with the overvoltage limitation when the high-voltage source is idling without load or only lightly loaded also offers complete operational safety with the greatest possible personal protection.
  • the limits provided are coordinated so that the energy losses that occur during normal operation are minimal.
  • the magnetizing current of the mains transformer is fully compensated for by capacitors.
  • the particularly high inrush current typical for small transformers is absorbed by a corresponding limitation.
  • mains fuses can be used which only have to be measured at 1/4 to 1/5 of the normal strength. This increases the operational safety by a multiple.
  • the setting of the secondary high voltage already on the primary side takes advantage of the possibilities of phase shifting resulting from the analog AC technology and thus of the almost loss-free power setting. Due to the corresponding training in the primary circuit, the otherwise occurring transmission losses of the transformer are also avoided.
  • the intended reduction of the adhesive force of the adhesive plate which is realized according to the same technical principles as for the presetting of the high voltage, offers the same advantages.
  • the reminder lamp provided for this purpose and driven by current transformers is operated without any additional energy, this lamp reminding the user of the adhesive plate of the reduced adhesive force which is set in each case. Further advantages result if this reminder lamp is integrated without any additional energy together with its current transformer in the - real or blind - actuator resistance and fulfills a double function there.
  • the overall system which is matched to one another, works purely analog, is very energy-saving, does not generate any appreciable heat loss and works without any high frequency, so that it is also completely free of interference radiation. Thus, no complex shielding and interference suppression measures are required.
  • the proposed design of the electrostatic adhesive plate finally enables the production of an extremely stable and also mechanically safe product.
  • Fig. 1 schematically in section in an exploded view the structural parts of the electrostatically chargeable adhesive plate and
  • FIG. 2 schematically shows a top view of the meander of the adhesive plate embodied as a three-wire system with the circuit diagram of the associated power supply device.
  • the electrostatically chargeable adhesive plate in the exemplary embodiment shown has a base plate 1 to which a cover plate 3 or cover layer is fastened on the upper side, for example by means of an adhesive layer 2.
  • the base plate 1 consists of a carrier material of high strength, for example made of wood or solid solid plastic, so that it supports the electrically active cover plate 3, which can also be provided in the form of a surface layer, without torsion and breakage and also with suitable ones Starting points, for example for fastening aids such as eyelets or for bores, can be provided.
  • the electrically active cover plate 3 has on its underside a meander 4 in the form of correspondingly running conductor tracks for generating an electrostatic field which effects the sheet holder.
  • the meander 4 is designed as a three-wire system. For this purpose there are two live meandering tracks 5, 6 are provided, between which a third meandering track 7 is arranged as a central conductor. This divides the electrostatic field into two halves of identical earth symmetry.
  • All three meandering tracks 5, 6, 7 are surrounded by a framing conductor 8, which is fully and rigidly grounded and connected to the respective ends of the grounded third meandering track 7.
  • the framing wire 8 is connected to a solid protective conductor 12 together with the grounded meander track 7. As can be seen from FIG. 2, this is looped through from the framing conductor 8 and the central conductor 7 of the meander 4 via a high-voltage cascade 13 and a mains isolating part 14 to the mains connection 15 (protective contact plug).
  • the mains isolating part 14 which is designed as a mains transformer with primary winding 16 and secondary winding 17, separates the power supply device 11 into a primary circuit (on the right in FIG. 2) and in a secondary circuit (on the left in FIG. 2).
  • the secondary winding 17 of the mains transformer 14 is rigidly grounded at its center via the protective conductor 12, so that the AC voltage of the mains isolating part 14 is fed exactly in half to the following high-voltage cascade 13.
  • the high-voltage cascade 13 which has correspondingly switched diodes 18 and capacitors 19, is rigidly grounded exactly in the middle and is designed to be electrically strictly earth-symmetrical, so that it supplies two voltages which are reverse-polarized to earth and are completely earth-symmetrical.
  • Two real protective resistors 20 are provided in the output of the high-voltage cascade 13. These are dimensioned such that the voltage drop across them is insignificant in the normal operating state, but that the short-circuit currents and discharge current surges of the capacitors 19 of the high-voltage cascade 13 are limited to such an extent that their diodes 18 remain undamaged if the adhesive plate is touched unintentionally.
  • the high-voltage cascade 13 has an earth-symmetrically identical voltage limitation which limits the two voltages of opposite polarity to earth supplied by the cascade 13.
  • voltage limiting means in the embodiment shown in the form of varistors 21, are provided which limit the high DC voltage of opposite polarity to earth to a set level.
  • the current limitation brought about by the protective resistors 20 and the voltage limitation brought about by the varistors 21 are of symmetrical design, so that each earth-symmetrical half of the secondary circuit of the power supply device 11 is protected independently and safely.
  • the secondary high voltage prevailing in the secondary circuit is already roughly preset in the primary circuit of the power supply device 11, ie in front of the mains transformer 14. This is done by means of appropriate series resistors 22, which are designed either as real resistors and / or as reactive resistors. In this case, transmission losses through the system are minimized even when real series resistors 22 are used, because these series resistors 22 are arranged in front of the mains transformer 14. However, if these series resistors 22 are in the form of reactors or represent a combination of real and reactances, the rough presetting of the seconds där high voltage by means of the phase shift between current and voltage in AC mains. This setting is done almost lossless electrically.
  • One or more capacitors 23 are arranged in front of the primary winding 16 of the mains transformer 14 for the purpose of reactive current compensation. As a result, the primary current circuit is almost completely reduced in its current consumption or current flow to the pure active current consumption or active current flow. In connection with this, the inrush current of the mains transformer 14 is also considerably damped. This is done by means of one or more NTC resistors 24 (resistor with a negative temperature coefficient or thermistor). As a result, the inrush current of the mains transformer 14 is damped to normal operating current. This means that the primary power supply fuses can be rated for the normal operational active current.
  • a corresponding adjusting device or adjusting circuit 25 which has a resistance divider with a reminder lamp.
  • the resistance controller which is matched to the overall system, is made up of real and / or reactance resistors.
  • the reminder lamp serves as a reminder that the adhesive force is in operation by the resistance regulator and that the adhesive force is reduced.
  • the reminder lamp which is purely current-driven by a current transformer, is somewhat constant in its luminosity over the entire adjustment range, because the adjustment of the adhesive force caused by the resistance regulator uses the phase shift in the AC alternating current to save losses. With this power adjustment, the system current remains relatively constant in relation to the very strongly changed adhesive force adjustment ratio.
  • the entire system works on the basis of the network frequency purely analog and therefore does not generate a high frequency.
  • the adhesive force adjustment effected by means of the adjusting circuit 25 and the presetting of the secondary high voltage effected by means of the series resistors 22 including the reactive current compensation achieved by means of the capacitors 23 and the damping of the inrush current achieved by means of the NTC resistors 24 also work according to the analog principle .

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Rectifiers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

Sur une plaque adhésive à charge électrostatique servant à maintenir des feuilles, feuillets ou similaire en particulier en papier ou en matière plastique, équipée d'un socle (1), d'une plaque de couverture (3) fixée à celui-ci et comportant, sur sa face inférieure, un méandre (4) sous la forme de pistes conductrices disposées de manière à produire un champ électrostatique maintenant les feuilles, et équipée également d'un dispositif d'alimentation électrique (11) relié aux pistes conductrices de la plaque de couverture (3), la disposition est réalisée de telle manière que le méandre (4) de la plaque de couverture (3) se présente comme un système à trois conducteurs avec deux pistes en méandre (5, 6) conduisant la tension et une piste en méandre (7) raccordée à la terre et disposée entre les deux autres pistes en tant que conducteur central répartissant le champ électrostatique en deux moitiés égales symétriques par rapport à la terre. Le méandre (4) est entouré, pour empêcher une déviation latérale du champ électrostatique, par un conducteur d'encadrement (8) raccordé au conducteur central (7). Il est prévu également un conducteur de protection plein (12) qui forme un circuit en boucle depuis le conducteur d'encadrement (8) et le conducteur central (7) du méandre (4) par l'intermédiaire d'un dispositif haute tension en cascade (13) et d'un sectionneur (14) jusqu'au dispositif de raccordement au secteur (15).
PCT/DE1991/000421 1990-06-01 1991-05-18 Plaque adhesive a charge electrostatique Ceased WO1991018751A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4017786.6 1990-06-01
DE4017786A DE4017786C1 (fr) 1990-06-01 1990-06-01

Publications (1)

Publication Number Publication Date
WO1991018751A1 true WO1991018751A1 (fr) 1991-12-12

Family

ID=6407688

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000421 Ceased WO1991018751A1 (fr) 1990-06-01 1991-05-18 Plaque adhesive a charge electrostatique

Country Status (8)

Country Link
EP (1) EP0480124B1 (fr)
AT (1) ATE127400T1 (fr)
AU (1) AU7859591A (fr)
DE (2) DE4017786C1 (fr)
IE (1) IE911829A1 (fr)
PT (1) PT97831A (fr)
WO (1) WO1991018751A1 (fr)
ZA (1) ZA914074B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112933449A (zh) * 2021-01-13 2021-06-11 安徽大学 一种生物压电式智能口罩及其智能控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410091C2 (de) * 1994-03-24 2003-01-09 Helmut Woll Verfahren zum Herstellen von elektrostatischen Hafttafeln
US7465684B2 (en) * 2005-01-06 2008-12-16 Buckeye Technologies Inc. High strength and high elongation wipe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT384780B (de) * 1985-08-09 1988-01-11 Goerz Electro Gmbh Elektrostatische papierhalterung
FR2623445A1 (fr) * 1987-11-19 1989-05-26 Vinci Rene Sous-main portable electronique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203969B (de) * 1963-08-16 1965-10-28 F L Moseley Company Einrichtung zur Halterung eines blattfoermigen Materials durch elektrostatische Anziehungskraefte
DE3133367A1 (de) * 1981-08-24 1985-04-25 SKP Technik AG, Brugg Vorrichtung zur halterung blattfoermiger gegenstaende, insbesondere zeichenbrett oder registrierplatte
DE8419399U1 (de) * 1984-06-28 1985-07-25 Wikete, Arno, 7542 Schömberg Schreib- und Zeichenplatte mit elektrostatischer Papier- und Folienbefestigung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT384780B (de) * 1985-08-09 1988-01-11 Goerz Electro Gmbh Elektrostatische papierhalterung
FR2623445A1 (fr) * 1987-11-19 1989-05-26 Vinci Rene Sous-main portable electronique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112933449A (zh) * 2021-01-13 2021-06-11 安徽大学 一种生物压电式智能口罩及其智能控制方法

Also Published As

Publication number Publication date
ATE127400T1 (de) 1995-09-15
IE911829A1 (en) 1991-12-04
DE59106419D1 (de) 1995-10-12
PT97831A (pt) 1993-06-30
AU7859591A (en) 1991-12-31
EP0480124A1 (fr) 1992-04-15
EP0480124B1 (fr) 1995-09-06
ZA914074B (en) 1992-02-26
DE4017786C1 (fr) 1991-10-02

Similar Documents

Publication Publication Date Title
DE102017217132B3 (de) Schaltnetzteil mit elektrischer Schaltungsanordnung zur Eingangsschutzbeschaltung
EP0116275B1 (fr) Compensateur de puissance réactive
WO2018171923A1 (fr) Disjoncteur
DE2251936C2 (de) Entmagnetisierungsschaltung für eine Farbbildröhre
DE2524367A1 (de) Schaltung zur umwandlung von wechselspannungen in eine gleichspannung konstanter groesse
DE3338301C2 (fr)
DE2729913C3 (de) Entmagnetisierungsschaltungsanordnung in einem Farbfernsehempfänger und Farbfernsehempfänger mit einer solchen Anordnung
EP0480124B1 (fr) Plaque de maintien rechargeable électrostatiquement
DE1464670C3 (de) Schaltungsanordnung zur Steuerung des elektrischen Stromes in einem Wechselstromkreis
DE9006245U1 (de) Elektrostatisch aufladbare Haftplatte
DE2554825C3 (de) Schaltungsanordnung zur Erzeugung einer Ausgangsspannung aus einer von einer Gleichspannungsquelle gelieferten Eingangsgleichspannung abhängig von einer vorgegebenen Sollspannung
DE19747712C2 (de) Anordnung eines Stufenschalters an einem Stufentransformator
DE3149447A1 (de) Regelungsschaltung zum konstanthalten der betriebsspannung eines elektrischen verbrauchers
EP0164774A1 (fr) Dispositif de circuit pour régler la tension de l'arc dans des lampes à décharge à haute pression
DE3418065C2 (fr)
DE870874C (de) Strom- und Spannungsbegrenzung bei elektrostatischen Lackierungs- und Elektrofilteranlagen
DE2130324C3 (fr)
DE931058C (de) Relaislose Einrichtung zur Leistungskonstanthaltung
DE10018372C2 (de) Schaltungsanordnung zur Einschaltstrombegrenzung für eine Stromversorgung
DE553192C (de) Elektrische Schaltanordnung zur Speisung von Gleichstromkreisen, z. B. in Rundfunkgeraeten, aus einem Wechselstromnetz mittels Gleichrichters
DE1187726B (de) Anordnung zum Schutz einer mit Kathodenzerstaeubung arbeitenden ionischen Hochvakuumpumpen-Anordnung
DE1025496B (de) Strom- und Spannungsbegrenzung bei elektrostatischen Lackierungs- und Elektrofilteranlagen
DE2708673C2 (de) Schaltungsanordnung zur Einschalt-Strombegrenzung
DE877794C (de) Gleichrichtersystem mit einer oder mehreren Gleichrichterroehren und mit einer gemeinsamen, mit den Gleichrichterroehren verwendeten Drosselspule zum Glaetten des gleichgerichteten Stromes
AT374310B (de) Schaltungsanordnung fuer die versorgung von gleichstromverbrauchern aus einem wechselstromnetz

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA FI JP NO SU US

NENP Non-entry into the national phase

Ref country code: CA