WO1991018339A1 - Device for external protection of data processing systems against micro-outages - Google Patents

Device for external protection of data processing systems against micro-outages Download PDF

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Publication number
WO1991018339A1
WO1991018339A1 PCT/FR1991/000357 FR9100357W WO9118339A1 WO 1991018339 A1 WO1991018339 A1 WO 1991018339A1 FR 9100357 W FR9100357 W FR 9100357W WO 9118339 A1 WO9118339 A1 WO 9118339A1
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WO
WIPO (PCT)
Prior art keywords
computer system
rectifier
voltage
external protection
network
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Application number
PCT/FR1991/000357
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French (fr)
Inventor
Jean-Marcel Begon
Original Assignee
Divertec International
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Publication date
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Publication of WO1991018339A1 publication Critical patent/WO1991018339A1/en

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/30Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

Definitions

  • the invention relates to a device for external protection of computer systems with regard to micro-cuts in the power supply; it aims to preserve the information contained in the central unit or units of the computer system for a predetermined period, called the security period, which can be of the order of a few seconds.
  • alternative supply inint errup t ib le which ensures a permanent alternative supply of the system.
  • This device essentially comprises an inverter which can either operate continuously associated with a buffer battery, or be started up in the event of detection of a supply fault.
  • the inverter is permanently supplied by a low voltage / high current source which must also ensure the maintenance of the charge of the buffer battery: such a system requires complex electronic circuitry and an inverter high reliability; in the second case, the complexity stems, on the one hand, from the presence of an energy storage battery, on the other hand, from the need to provide means for detecting supply faults, means for very rapid switching of the inverter and means for synchronizing it with the network.
  • US-A-4,818,891 describes a protection device, internal to a microcomputer, which makes it possible to maintain a direct voltage across the terminals of a capacitor upstream of the switching power supply of the microcomputer. Thanks to a fault detection system and a battery booster: in the event of a fault, the latter recharges the capacitor at a higher voltage than the nominal voltage.
  • this system is internal to the microcomputer and has a complex structure because, as before, it includes a battery and heavy electronic circuitry (detection system, voltage booster, etc.).
  • the problem of the overall protection of a computer system against micro-cuts is currently poorly resolved for the majority of the computer system fleet.
  • the present invention proposes to provide a satisfactory solution to this protection problem by providing a new computer system protection device against micro-cuts.
  • the invention relates to an external device intended to be connected upstream of the computer system between the alternative power supply network and the computer system, in order to ensure the backup of the latter for a predetermined period, called the security period, which can be adjusted to a few seconds.
  • An essential objective of the invention is to provide a device with an extremely simple structure, not requiring the presence of an inverter or a battery, in order to benefit from a cost considerably reduced compared to the cost of current systems.
  • Another objective is to provide a device capable of clipping short-term overvoltages or parasites which may appear on the alternating supply network.
  • the external protection device targeted by the invention is intended to be connected upstream of a computer system comprising at least one central unit with a standard AC power outlet and at least one screen with a standard outlet.
  • 'AC supply; the device according to the present invention comprises in combination:
  • a rectifier preferably in full-wave bridge, having an alternating input connected to the input means and a continuous output delivering a direct voltage, of value corresponding to the peak voltage present on the input means,
  • a storage capacitor with a capacity adapted to contain a charge for maintaining a voltage equivalent to that of the AC network during the safety period, this capacitor having its terminals connected to the DC output of the rectifier, so as to store the charge under a voltage of value equivalent to the peak voltage of the AC network,
  • the device of the invention has no inverter, no battery, no electronic auxiliary circuit and, instead of supplying the central units with alternating current, it supplies them with a direct voltage corresponding to the peak value of the alternating voltage. of the network, however that the screen or screens are always supplied, via the above-defined branch, by the alternating voltage of the network.
  • the direct voltage delivered by the device of the invention is rigorous ent equivalent, for these converters and therefore for the central units placed in series, with the alternating voltage delivered by the network or by the inverters of conventional protection devices: consequently, in the normal operating phase, the device of the invention makes no modification to the operation of the computer system, except that it ensures very favorable clipping of the possible overvoltages of the network AC voltage
  • the storage capacitor kept permanently charged, restores the stored energy in the form of a direct current which prolongs the normal supply current for the duration of the micro-interruption: it is therefore masked for the the central unit and the information contained in its memories, as well as the supports thereof, are preserved.
  • the screen being only a vision monitor can turn off without any consequences during the duration of the micro-interruption, its supply being again ensured through the bypass at the end of the latter.
  • the device of the invention thus provides perfectly effective protection of computer systems with regard to micro-cuts, by means of a structurally very simple device., By treating the screens differently (large energy consumer) and the central units (much lower power), and by supplying the latter with a DC voltage easy to store; it is essential to note that this continuous supply is made at the peak voltage of the network, so that, taking into account the energy to be stored, the size of the storage capacitor remains reduced and of cost compatible with the low cost price of the device.
  • the DC supply voltage delivered by the protection device of the invention is approximately
  • the capacitance C of the capacitor expressed in microfarads, will be chosen between 10 P.T and 50 P. T.
  • this capacity will advantageously be between 2000 and 5000 microfarads, which represents a stored energy between 90 and 225 joules, capable of ensuring a maintenance of the supply current for at least
  • FIG. 1 is a perspective view of the device of the invention and its connections to the AC network and a low-power computer system
  • FIG. 2 is an electronic diagram of the device.
  • the protective device shown by way of example in the figures is housed in a box 1 which comprises a male chassis socket 2 intended to be connected to the 220 volt AC network by an extension 3.
  • This housing also includes a female chassis socket 4 intended to "be connected, via an extension 7, to the standard male chassis socket 5 fitted to the computer screen 6 of the computer system.
  • a movable cord 8 escapes from the housing and carries its end a female socket marked 9, intended to connect to the male socket 10 of the central unit 11 of the computer system.
  • the male plug 2 is connected to the alternating diagonal of a bridge rectifier 12 constituted by a full-wave bridge of four diodes.
  • a load current limiting resistor 13 is inserted upstream of the rectifier 12, while a delayed effect fuse 14 (for example 200 ms) is inserted in series on the male input socket 2.
  • the continuous diagonal of the rectifier 12 is connected to the female socket 9, with a rapid fuse 15 inserted in series.
  • a lectroiytic capacitor 16 is connected in parallel to the output of the continuous diagonal of the rectifier 12.
  • This capacitor has, in the example, a capacity of 3,300 microfarads, ensuring a good compromise between size, price and guaranteed protection (greater than 2 seconds for a 60 watt central unit).
  • the capacitor 16 will be chosen as already indicated in a range between 10 PT and 50 PT (P: power of the central unit or units in watts; T: safety duration in seconds; C expressed in microfarads ).
  • a bypass 17 is connected to the input socket 2 downstream of the fuse 14 in order to connect the latter to the output socket 4 in order to supply the screen with the AC voltage of the AC network.
  • the protection device according to the invention has a very simple structure (devoid of inverters and any active switching system) and can be manufactured at a reduced price, making its use economically compatible with all existing computer systems. It ensures an adequate supply of the computer system when the voltage on the network is normal and masks the icro cut of this voltage. In addition, this system also has the advantage of clipping any parasites and short-term overvoltages present on the AC supply voltage.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The external protection device for data processing systems against micro-outages is arranged between the AC network and the data processing system and is comprised of a DC output (9) which supplies the central processing unit or units and an AC output (4) which supplies the screen or screens. The DC voltage delivered at the output (9) is generated by a full-wave bridge rectifier (12); a storage capacitor is connected in parallel to the DC output of said rectifier so as to store a charge for maintaining a voltage equivalent to that of the AC network during a safety period. The device of the invention has an extremely simple structure, does not require an inverter, may be fabricated at very low cost so as to be compatible with low power electronic systems.

Description

DISPOSITIF DE PROTECTION EXTERNE DE SYSTEMES INFORMATIQUES A L'EGARD DES MICROCOUPURES DE L'ALIMENTATION ELECTRIQUE - DEVICE FOR EXTERNAL PROTECTION OF COMPUTER SYSTEMS WITH RESPECT TO MICROSWITCHES OF ELECTRICAL SUPPLY -
L'invention concerne un dispositif de protection externe de systèmes infor a iques à l'égard des microcoupures de l'alimentation électrique ; elle vise à préserver les informations contenues dans la ou les unités centrales du système informatique pendant une durée prédéterminée, dite durée de sécurité, qui peut être de l'ordre de quelques secondes.The invention relates to a device for external protection of computer systems with regard to micro-cuts in the power supply; it aims to preserve the information contained in the central unit or units of the computer system for a predetermined period, called the security period, which can be of the order of a few seconds.
On sai t que l e réseau al ternati f d'alimentation est soumis à de fréquentes perturbations de faible durée, dite icrocoupures, qui sont susceptibles d'affecter, parfois gravement, les informations contenues dans les mémoires des systèmes informatiques ainsi que les supports magnétiques de ces informations.It is known that the al ternati f power supply network is subject to frequent short-term disturbances, known as “blackouts”, which are likely to affect, sometimes seriously, the information contained in the memories of computer systems as well as the magnetic media of these informations.
Pour écarter les problèmes liés à ces microcoupures, il est d'usage d'interposer sur l'alimentation du système informatique un dispositif dit d'alimentation alternative inint errup t ib le , qui assure une alimentation alternative permanente du système. Ce dispositif comprend essentiellement un onduleur qui peut soit fonctionner en permanence associé à une batterie-tampon, soit être mis en route en cas de détection d'un défaut d'alimentation.To eliminate the problems linked to these micro-cuts, it is customary to interpose on the supply of the computer system a device called alternative supply inint errup t ib le, which ensures a permanent alternative supply of the system. This device essentially comprises an inverter which can either operate continuously associated with a buffer battery, or be started up in the event of detection of a supply fault.
Toutefois, de tels dispositifs présentent de par leur nature même, le défaut d'être complexes et donc coûteux ; en effet, dans le premier cas, l'onduleur est alimenté en permanence par une source basse tension/fort courant qui doit en outre assurer le maintien de la charge de la batterie-tampon : un tel système exige une circuiterie électronique complexe et un onduleur de grande fiabilité ; dans le deuxième cas, la complexité provient, d'une part, de la présence d'une batterie de stockage de l'énergie, d'autre part, de la nécessité de prévoir des moyens de détection des défauts d'ali entation, des moyens de commutation très rapide de l'onduleur et des moyens de synchronisation de celui-ci avec le réseau.However, such devices have by their very nature the defect of being complex and therefore costly; in fact, in the first case, the inverter is permanently supplied by a low voltage / high current source which must also ensure the maintenance of the charge of the buffer battery: such a system requires complex electronic circuitry and an inverter high reliability; in the second case, the complexity stems, on the one hand, from the presence of an energy storage battery, on the other hand, from the need to provide means for detecting supply faults, means for very rapid switching of the inverter and means for synchronizing it with the network.
Les coûts des dispositifs d'alimentation alternative ininterruptible ou des dispositifs de protection externes actuellement disponibles sur le marché, en réservent l'usage à une minorité d'utilisateurs : la majorité des usagers, en particulier les utilisateurs de petits systèmes, subissent encore les perturbations créées par les microcoupures du réseau (plus de 80 % des usagers).The costs of uninterruptible AC power supply devices or external protection devices currently available on the market reserve them use by a minority of users: the majority of users, in particular users of small systems, are still subject to the disruptions created by network blackouts (more than 80% of users).
Par ailleurs, la publication suivante : "The Ninth International Télécommunica ions Energy Conférence Proceedings, Stockholm, 14-17 juin 1987, p. 163-168 ANDERSEN et al.", décrit un dispositif, interne à un micro- ordinateur, qui engendre de basses tensions continues pour les cartes électroniques de l'unité centrale et une tension alternative pour alimenter l'écran ; ce dispositif comprend un système de protection en cas de coupure, combinant une batterie, un onduleur-élévateur, deux convertisseurs à découpage de sortie et, comme précédemment, des moyens de détection de défaut et des moyens de commutation rapide pour activer l'onduleur et les alimentations à découpage en cas de défaut. Ce dispositif présente les mêmes inconvénients que le dispositif précédemment décrit. En outre, il ne peut constituer une protection externe branchée sur l'entrée standard du micro- ordinateur, car des fils conducteurs doivent être connectés individuellement aux différentes cartes électroniques de l'unité centrale.Furthermore, the following publication: "The Ninth International Telecommunication Energy Conference Proceedings, Stockholm, June 14-17, 1987, p. 163-168 ANDERSEN et al.", Describes a device, internal to a microcomputer, which generates low continuous voltages for the electronic cards of the central unit and an alternating voltage to supply the screen; this device comprises a protection system in the event of a power cut, combining a battery, an inverter-booster, two output switching converters and, as before, fault detection means and rapid switching means for activating the inverter and switching power supplies in the event of a fault. This device has the same drawbacks as the device previously described. In addition, it cannot constitute an external protection connected to the standard input of the microcomputer, since conductive wires must be individually connected to the various electronic cards of the central unit.
De plus, le brevet US-A-4.818.891 décrit un dispositif de protection, interne à un micro-ordinateur, qui permet de maintenir une tension continue aux bornes d'un condensateur en amont de l'alimentation à découpage du micro- ordinateur grâce à un système de détection de défaut et à un élévateur à batterie : en cas de défaut, ce dernier recharge le condensateur à une tension plus élevée que la tension nominale. Toutefois ce système est interne au micro-ordinateur et présente une structure complexe car, comme précédemment, il comprend une batterie et une circuiterie électronique lourde (système de détection, élévateur de tension...). Ainsi, le problème de la protection d'ensemble d'un système informatique à l'égard des microcoupures est actuellement mal résolu pour la majorité du parc de systèmes informatiques.In addition, US-A-4,818,891 describes a protection device, internal to a microcomputer, which makes it possible to maintain a direct voltage across the terminals of a capacitor upstream of the switching power supply of the microcomputer. thanks to a fault detection system and a battery booster: in the event of a fault, the latter recharges the capacitor at a higher voltage than the nominal voltage. However, this system is internal to the microcomputer and has a complex structure because, as before, it includes a battery and heavy electronic circuitry (detection system, voltage booster, etc.). Thus, the problem of the overall protection of a computer system against micro-cuts is currently poorly resolved for the majority of the computer system fleet.
La présente invention se propose d'apporter une solution satisfaisante à ce problème de protection en fournissant un nouveau dispositif de protection de système informatique à l'égard des microcoupures. L'invention vise un dispositif externe destiné à se brancher en amont du système informatique entre le réseau alternatif d'alimentation électrique et le système informatique, en vue d'assurer la sauvegarde de ce dernier pendant une durée prédéterminée, dite durée de sécurité, qui peut être ajustée à quelques secondes.The present invention proposes to provide a satisfactory solution to this protection problem by providing a new computer system protection device against micro-cuts. The invention relates to an external device intended to be connected upstream of the computer system between the alternative power supply network and the computer system, in order to ensure the backup of the latter for a predetermined period, called the security period, which can be adjusted to a few seconds.
Un objectif essentiel de l'invention est de fournir un dispositif de structure extrêmement simple, ne nécessitant pas la présence d'un onduleur ni d'une batterie, en vue de bénéficier d'un coût considérablement réduit par rapport au coût des systèmes actuels.An essential objective of the invention is to provide a device with an extremely simple structure, not requiring the presence of an inverter or a battery, in order to benefit from a cost considerably reduced compared to the cost of current systems.
Un autre objectif est de fournir un dispositif capable d'écrêter les surtensions ou parasites de courte durée qui peuvent apparaître sur le réseau alternatif d ' alimentation .Another objective is to provide a device capable of clipping short-term overvoltages or parasites which may appear on the alternating supply network.
Par la suite, on utilisera selon l'habitude l'abréviation AC pour qualifier une tension alternative. Le dispositif de protection externe visé par l'invention est destiné à se brancher en amont d'un système informatique comprenant au moins une unité centrale dotée d'une prise standard d'alimentation AC et au moins un écran doté d'une prise standard d'alimentation AC ; le dispositif conforme à la présente invention comprend en combinaison :Thereafter, the abbreviation AC will be used as usual to qualify an AC voltage. The external protection device targeted by the invention is intended to be connected upstream of a computer system comprising at least one central unit with a standard AC power outlet and at least one screen with a standard outlet. 'AC supply; the device according to the present invention comprises in combination:
- des moyens d'entrée adaptés pour être connectés au réseau AC,- input means adapted to be connected to the AC network,
- un redresseur, de préférence en pont double alternance, ayant une entrée alternative reliée aux moyens d'entrée et une sortie continue délivrant une tension continue, de valeur correspondant à la tension crête présente sur les moyens d'entrée,a rectifier, preferably in full-wave bridge, having an alternating input connected to the input means and a continuous output delivering a direct voltage, of value corresponding to the peak voltage present on the input means,
- un condensateur de stockage de capacité adaptée pour contenir une charge de maintien d'une tension équivalente à celle du réseau AC pendant la durée de sécurité, ce condensateur ayant ses bornes reliées à la sortie continue du redresseur, de façon à stocker la charge sous une tension de valeur équivalente à la tension crête du réseau AC ,a storage capacitor with a capacity adapted to contain a charge for maintaining a voltage equivalent to that of the AC network during the safety period, this capacitor having its terminals connected to the DC output of the rectifier, so as to store the charge under a voltage of value equivalent to the peak voltage of the AC network,
- de premiers moyens de sortie, reliés aux bornes- du condensateur de stockage et adaptés pour permettre de brancher la prise standard d'alimen ation AC de la ou des unités centrales du système informatique,- first output means, connected to the terminals - of the storage capacitor and adapted to allow connect the standard AC power outlet of the computer system central unit (s),
- de seconds moyens de sortie, adaptés pour permettre de brancher la prise standard d'alimentation AC du ou des écrans du système informatique,- second output means, adapted to allow the standard AC power socket to be connected to the computer system screen (s),
- une dérivation reliant les moyens d'entrée et les seconds moyens de sortie.- a bypass connecting the input means and the second output means.
Ainsi, le dispositif de l'invention ne comporte ni onduleur, ni batterie, ni circuit auxiliaire électronique et, au lieu d'alimenter les unités centrales en courant alternatif, il les alimente en une tension continue correspondant à la valeur crête de la tension alternative du réseau, cependant que le ou les écrans sont toujours alimentés, via la dérivation sus-définie, par la tension alternative du réseau. Les unités centrales des systèmes informatiques étant équipées de convertisseur à découpage, la tension continue délivrée par le dispositif de l'invention est rigoureuse ent équivalente, pour ces convertisseurs et donc pour les unités centrales placées en série, à la tension alternative délivrée par le réseau ou par les onduleurs des dispositifs de protection classiques : en conséquence, en phase de fonctionnement normal, le dispositif de l'invention n'apporte aucune modification au fonctionnement du système informatique, si ce n'est qu'il assure un écrêtage très favorable des éventuelles surtensions de la tension AC du réseau. En cas de microcoupure, le condensateur de stockage, maintenu chargé en permanence, restitue l'énergie emmagasinée sous forme d'un courant continu qui prolonge le courant normal d'alimentation pendant la durée de la microcoupure : celle-ci est donc masquée pour l'unité centrale et les informations contenues dans ses mémoires, de même que les supports de celles-ci sont préservés. De plus, l'écran n'étant qu'un moniteur de vision peut s'éteindre sans aucune conséquence pendant la durée de la microcoupure, son alimentation étant à nouveau assurée à travers la dérivation à la fin de celle-ci. Le dispositif de l'invention assure ainsi une protection des systèmes informatiques parfaitement efficace à l'égard des microcoupures, au moyen d'un dispositif structurellement très simple., en traitant de façon différente les écrans (gros consommateur d'énergie) et les unités centrales (puissance beaucoup plus faible), et en alimentant ces dernières en une tension continue facile à stocker ; il est essentiel de noter que cette alimentation continue est faite à la tension crête du réseau, de sorte que, compte-tenu de l'énergie à stocker, la taille du condensateur de stockage reste réduite et de coût compatible avec le bas prix de revient du dispositif.Thus, the device of the invention has no inverter, no battery, no electronic auxiliary circuit and, instead of supplying the central units with alternating current, it supplies them with a direct voltage corresponding to the peak value of the alternating voltage. of the network, however that the screen or screens are always supplied, via the above-defined branch, by the alternating voltage of the network. The central units of the computer systems being equipped with switching converter, the direct voltage delivered by the device of the invention is rigorous ent equivalent, for these converters and therefore for the central units placed in series, with the alternating voltage delivered by the network or by the inverters of conventional protection devices: consequently, in the normal operating phase, the device of the invention makes no modification to the operation of the computer system, except that it ensures very favorable clipping of the possible overvoltages of the network AC voltage In the event of a micro-interruption, the storage capacitor, kept permanently charged, restores the stored energy in the form of a direct current which prolongs the normal supply current for the duration of the micro-interruption: it is therefore masked for the the central unit and the information contained in its memories, as well as the supports thereof, are preserved. In addition, the screen being only a vision monitor can turn off without any consequences during the duration of the micro-interruption, its supply being again ensured through the bypass at the end of the latter. The device of the invention thus provides perfectly effective protection of computer systems with regard to micro-cuts, by means of a structurally very simple device., By treating the screens differently (large energy consumer) and the central units (much lower power), and by supplying the latter with a DC voltage easy to store; it is essential to note that this continuous supply is made at the peak voltage of the network, so that, taking into account the energy to be stored, the size of the storage capacitor remains reduced and of cost compatible with the low cost price of the device.
En particulier, pour un système informatique appelé à être alimenté sous une tension alternative deIn particular, for a computer system called to be supplied with an alternating voltage of
220 volts, la tension continue d'alimentation délivrée par le dispositif de protection de l'invention est d'environ220 volts, the DC supply voltage delivered by the protection device of the invention is approximately
300 volts (220 2). Si P est la puissance des unités centrales exprimée en watts et T la durée de sécurité exprimée en secondes, la capacité C du condensateur, exprimée en microfarads, sera choisie comprise entre 10 P.T et 50 P. T.300 volts (220 2). If P is the power of the central units expressed in watts and T the safety duration expressed in seconds, the capacitance C of the capacitor, expressed in microfarads, will be chosen between 10 P.T and 50 P. T.
Pour une puissance nominale courante inférieure à 100 watts des unités centrales, cette capacité sera avantageusement comprise entre 2000 et 5000 microfarads, ce qui représente une énergie stockée comprise entre 90 et 225 joules, apte à assurer un maintien du courant d'alimentation pendant au moinsFor a current nominal power of less than 100 watts from the central units, this capacity will advantageously be between 2000 and 5000 microfarads, which represents a stored energy between 90 and 225 joules, capable of ensuring a maintenance of the supply current for at least
2 secondes (généralement les microcoupures ont des durées inférieures à la seconde).2 seconds (generally micro-cuts have durations of less than one second).
Il est à noter que certains systèmes informatiques comportent au niveau de certains de leurs sous- ensembles, des condensât eurs- ta m pons basse tension intégrés dans des circuits internes. Mais, aucun de ces circuits ne permet, comme c'est le cas du dispositif de l'invention, de protéger globalement un système informatique en alimentant l'ensemble des unités centrales en courant continu, en assurant la charge d'un condensateur sous tension continue élevée et en alimentant de façon différente les écrans.It should be noted that certain computer systems include, at the level of some of their sub-assemblies, low-voltage capacitors and voltages integrated into internal circuits. However, none of these circuits makes it possible, as is the case with the device of the invention, to globally protect a computer system by supplying all the central units with direct current, by ensuring the charging of a live capacitor. continuous high and feeding different screens.
D'autres caractéristiques, buts et avantages de l'invention ressortiront de la description qui suit en référence aux dessins annexés qui présentent, à titre d'exemple non limitatif, un mode de réalisation de l'invention ; sur ces dessins qui font partie intégrante de la présente description :Other characteristics, objects and advantages of the invention will emerge from the description which follows with reference to the appended drawings which present, by way of nonlimiting example, an embodiment of the invention; on these drawings which form an integral part of this description:
- la figure 1 est une vue en perspective du dispositif de l'invention et de ses raccordements au réseau AC et à un système informatique de faible puissance,- Figure 1 is a perspective view of the device of the invention and its connections to the AC network and a low-power computer system,
- la figure 2 est un schéma électronique du dispositif. Le dispositif de protection représenté à titre d'exemple aux figures est logé dans un boîtier 1 qui comporte une prise mâle de châssis 2 destinée à être raccordée au réseau alternatif 220 volts par un prolongateur 3. Ce boîtier comporte également une prise femelle de châssis 4 destinée à "être raccordée, par l'entremise d'un prolongateur 7, à la prise mâle standard de châssis 5 équipant l'écran informatique 6 du système informatique. De plus, un cordon mobile 8 s'échappe du boîtier et porte à son extrémité une prise femelle repérée 9, destinée à se brancher sur la prise mâle 10 de l'unité centrale 11 du système informatique.- Figure 2 is an electronic diagram of the device. The protective device shown by way of example in the figures is housed in a box 1 which comprises a male chassis socket 2 intended to be connected to the 220 volt AC network by an extension 3. This housing also includes a female chassis socket 4 intended to "be connected, via an extension 7, to the standard male chassis socket 5 fitted to the computer screen 6 of the computer system. In addition, a movable cord 8 escapes from the housing and carries its end a female socket marked 9, intended to connect to the male socket 10 of the central unit 11 of the computer system.
Comme le représente la figure 2, la prise mâle 2 est reliée à la diagonale alternative d'un redresseur en pont 12 constitué par un pont double alternance de quatre diodes . Une résistance 13 de limitation de courant de charge est insérée en amont du redresseur 12, cependant qu'un fusible à effet retardé 14 (par exemple 200 ms) est inséré en série sur la prise mâle d'entrée 2.As shown in FIG. 2, the male plug 2 is connected to the alternating diagonal of a bridge rectifier 12 constituted by a full-wave bridge of four diodes. A load current limiting resistor 13 is inserted upstream of the rectifier 12, while a delayed effect fuse 14 (for example 200 ms) is inserted in series on the male input socket 2.
La diagonale continue du redresseur 12 est reliée à la prise femelle 9, avec insertion en série d'un fusible rapide 15.The continuous diagonal of the rectifier 12 is connected to the female socket 9, with a rapid fuse 15 inserted in series.
De plus, un condensateur lectroiytique 16 est relié en parallèle à la sortie de la diagonale continue du redresseur 12. Ce condensateur présente en l'exemple une capacité de 3 300 microfarads, assurant un bon compromis entre taille, prix et protection garantie (supérieure à 2 secondes pour une unité centrale de 60 watts). En pratique, l'on choisira comme déjà indiqué la capacité du condensateur 16 dans une plage comprise entre 10 P.T et 50 P.T (P : puissance de la ou des unités centrales en watts ; T : durée de sécurité en secondes ; C exprimé en microfarads).In addition, a lectroiytic capacitor 16 is connected in parallel to the output of the continuous diagonal of the rectifier 12. This capacitor has, in the example, a capacity of 3,300 microfarads, ensuring a good compromise between size, price and guaranteed protection (greater than 2 seconds for a 60 watt central unit). In practice, the capacitor 16 will be chosen as already indicated in a range between 10 PT and 50 PT (P: power of the central unit or units in watts; T: safety duration in seconds; C expressed in microfarads ).
Par ailleurs, une dérivation 17 est connectée sur la prise d'entrée 2 en aval du fusible 14 afin de relier celle-ci à la prise de sortie 4 en vue d'alimenter l'écran par la tension alternative du réseau AC. Le dispositif de protection conforme à l'invention présente une structure très simple (dépourvue d'onduleurs et de tout système actif de commutation) et peut être fabriqué à un prix réduit, rendant son emploi économiquement compatible avec tous les systèmes informatiques existants. Il assure une alimentation appropriée du système informatique lorsque la tension sur le réseau est normale et masque les i c ro coupu res de cette tension. En outre, ce système présente également l'avantage d'écrêter les éventuels parasites et surtensions de courte durée, présents sur la tension alternative d'alimentation. Furthermore, a bypass 17 is connected to the input socket 2 downstream of the fuse 14 in order to connect the latter to the output socket 4 in order to supply the screen with the AC voltage of the AC network. The protection device according to the invention has a very simple structure (devoid of inverters and any active switching system) and can be manufactured at a reduced price, making its use economically compatible with all existing computer systems. It ensures an adequate supply of the computer system when the voltage on the network is normal and masks the icro cut of this voltage. In addition, this system also has the advantage of clipping any parasites and short-term overvoltages present on the AC supply voltage.

Claims

REVENDICATIONS 1/ - Dispositif de protection externe d'un système informatique à l'égard des m i c ro c ou pu r es de l'ali entation électrique de durée au plus égale à une durée prédéterminée dite durée de sécurité, ce système informatique comprenant au moins une unité centrale dotée d'une prise standard d'alimentation AC et au moins un écran doté d'une prise standard d'alimentation AC, ledit dispositif de protection externe étant destiné à se brancher en amont du système informatique entre le réseau alternatif d'alimentation électrique AC et ledit système informatique, et étant caractérisé en ce qu'il comprend en combinaison :CLAIMS 1 / - Device for the external protection of a computer system with respect to the micro or micro power supply of duration at most equal to a predetermined duration called security duration, this computer system comprising at at least one central unit with a standard AC power outlet and at least one screen with a standard AC power outlet, said external protection device being intended to be connected upstream of the computer system between the AC network AC power supply and said computer system, and being characterized in that it comprises in combination:
- des moyens d'entrée (2) adaptés pour être connectés au réseau AC,- input means (2) adapted to be connected to the AC network,
- un redresseur (12) ayant une entrée alternative reliée aux moyens d'entrée (2) et une sortie continue délivrant une tension continue de valeur correspondant à la tension crête présente sur les moyens d ' entrée,- a rectifier (12) having an alternating input connected to the input means (2) and a continuous output delivering a direct voltage of value corresponding to the peak voltage present on the input means,
- un condensateur de stockage (16) de capacité adaptée pour contenir une charge de maintien d'une tension équivalente à celle du réseau AC pendant la durée de sécurité, ce condensateur ayant ses bornes reliées à la sortie continue du redresseur (12) de façon à stocker la charge sous une tension de valeur équivalente à la tension crête du réseau AC,- a storage capacitor (16) of capacity adapted to contain a charge for maintaining a voltage equivalent to that of the AC network during the safety period, this capacitor having its terminals connected to the continuous output of the rectifier (12) so to store the load under a voltage of value equivalent to the peak voltage of the AC network,
- de premiers moyens de sortie (8, 9), reliés aux bornes du condensateur de stockage (16) et adaptés pour permettre de brancher la prise standard d'alimentation AC de la ou des unités centrales du système informatique,- first output means (8, 9), connected to the terminals of the storage capacitor (16) and adapted to allow connection of the standard AC power outlet of the central unit or units of the computer system,
- de seconds moyens de sortie (4), adaptés pour permettre de brancher la prise standard d'alimentation AC du ou des écrans du système informatique, - une dérivation (17) reliant les moyens d'entrée (2) et les seconds moyens de sortie (4).- second output means (4), adapted to allow connection of the standard AC power outlet of the screen or screens of the computer system, - a bypass (17) connecting the input means (2) and the second means of outlet (4).
2/ - Dispositif selon la revendication 1 pour la protection d'un système informatique destiné à être alimenté sous une tension alternative de 220 volts, dont l'unité centrale présente une puissance nominale prédéterminée P, caractérisé en ce que le condensateur (16) est un condensateur électrolytique de capacité C comprise entre 10 P.T et 50 P.T où C est exprimé en microfarads, P est exprimé en watts et T est la durée de sécurité exprimée en secondes.2 / - Device according to claim 1 for the protection of a computer system intended to be supplied with an alternating voltage of 220 volts, whose central unit has a nominal power predetermined P, characterized in that the capacitor (16) is an electrolytic capacitor with a capacity C between 10 PT and 50 PT where C is expressed in microfarads, P is expressed in watts and T is the safety duration expressed in seconds.
3/ - Dispositif selon la revendication 2 pour la protection d'un système informatique dont l'unité centrale a une puissance nominale inférieure à 100 watts, caractérisé en ce que le condensateur (16) présente une capacité comprise entre 2 000 et 5 000 microfarads.3 / - Device according to claim 2 for the protection of a computer system whose central unit has a nominal power of less than 100 watts, characterized in that the capacitor (16) has a capacity of between 2,000 and 5,000 microfarads .
4/ - Dispositif de protection selon l'une des revendications 1, 2 ou 3, caractérisé en ce que le redresseur4 / - Protection device according to one of claims 1, 2 or 3, characterized in that the rectifier
(12) est un redresseur en pont double alternance, ayant une diagonale d'entrée alternative et une diagonale de sortie continue.(12) is a full wave bridge rectifier, having an alternating input diagonal and a continuous output diagonal.
5/ - Dispositif de protection externe selon la revendication 4, dans lequel le redresseur (12) est constitué par un pont double alternance de quatre diodes. 6/ - Dispositif de protection externe selon l'une des revendications 1, 2, 3 ou 4, dans lequel les moyens d'entrée sont constitués par une prise mâle (2).5 / - External protection device according to claim 4, wherein the rectifier (12) is constituted by a full-wave bridge of four diodes. 6 / - External protection device according to one of claims 1, 2, 3 or 4, wherein the input means are constituted by a male plug (2).
7/ - D i s p o s i t i f s e l o n l ' u n e d e s revendications 1, 2, 3, 4, 5 ou 6 pour la protection d'un système informatique dans lequel les prises standard unité centrale et écran sont des prises mâles de châssis, caractérisé en ce que :7 / - D i s p o s i t i f s e l o n one of claims 1, 2, 3, 4, 5 or 6 for the protection of a computer system in which the standard CPU and screen sockets are chassis sockets, characterized in that:
- les premiers moyens de sortie sont constitués par un cordon mobile (8) équipé d'une prise femelle repérée (9),the first outlet means consist of a movable cord (8) equipped with a marked female socket (9),
- les seconds moyens de sortie sont constitués par une prise femelle de châssis (4) en vue de la mise en place d'un prolongateur.- The second output means are constituted by a female chassis socket (4) for the installation of an extension.
8/ - Dispositif de protection externe selon l'une des revendications 1 à 7, dans lequel une résistance (13) de limitation de courant de charge est insérée en amont du redresseur (12).8 / - External protection device according to one of claims 1 to 7, in which a resistor (13) for limiting the load current is inserted upstream of the rectifier (12).
9/ - Dispositif de protection externe selon l'une des revendications 1 à 8, dans lequel : - un fusible à effet retardé (14) est inséré en série sur les moyens d'entrée (2),9 / - External protection device according to one of claims 1 to 8, in which: - a delayed effect fuse (14) is inserted in series on the input means (2),
- un fusible rapide (15) est inséré en série sur les premiers moyens de sortie (9). - a fast fuse (15) is inserted in series on the first output means (9).
PCT/FR1991/000357 1990-05-21 1991-04-29 Device for external protection of data processing systems against micro-outages WO1991018339A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR90/06667 1990-05-21
FR9006667A FR2662277B1 (en) 1990-05-21 1990-05-21 DEVICE FOR EXTERNAL PROTECTION OF COMPUTER SYSTEMS WITH RESPECT TO MICROSWITCHES OF ELECTRICAL SUPPLY.

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
FR2693051A1 (en) * 1992-06-25 1993-12-31 Ladapt Electric supply with alternating and direct outputs - uses battery and rectified DC supplies and inverter that delivers mains level supply for short period before DC supply takes over

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US4818891A (en) * 1988-05-06 1989-04-04 Digital Equipment Corporation Ride-through energy boost circuit

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The 9 th International Telecommunications Energie Conference, Proceedings, Stockholm, DK, 14-17 juin 1987, G. Andersen et al.: "Future powersupplies having huilt-inbattery back up", pages 163-168 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693051A1 (en) * 1992-06-25 1993-12-31 Ladapt Electric supply with alternating and direct outputs - uses battery and rectified DC supplies and inverter that delivers mains level supply for short period before DC supply takes over

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FR2662277B1 (en) 1992-08-14

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