VOLTAGE CONTROLLED RECTIFIER APPLICATION FOR WATER-ELECTROLYSIS

A circuit-arrangement and a method for switching-on / shutting-down an electrolysis system utilizing a voltage controlled rectifier are disclosed, whereby the output voltage Vdc of the active front end rectifier is ramped-up in a time-related function starting below knee point K of the electrolysis...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Atmadji, Ali, Schumann, Sven, Runser, Thibaut
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS APPARATUS THEREFOR CHEMISTRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS GENERATION METALLURGY
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Beschreibung
Zusammenfassung:	A circuit-arrangement and a method for switching-on / shutting-down an electrolysis system utilizing a voltage controlled rectifier are disclosed, whereby the output voltage Vdc of the active front end rectifier is ramped-up in a time-related function starting below knee point K of the electrolysis system and/or the output voltage Vdc of the active front end rectifier is ramped -down in a time-related function from an operational point to below the knee point K of the electrolysis system. By designing an active front end rectifier according to the invention to consider the knee point K of an electrolysis curve, a controlled ramp-up and ramp-down are performed without adding additional equipment. Moreover, the common degradation of the electrolysis cells can be reduced, since regular and rapid changes in current I density, which cause acceleration of the membrane, can be prevented.