System for generating and autocontrolling the voltage or...

Details System for generating and autocontrolling the voltage or... System for generating and autocontrolling the voltage or...

C - Chemistry, Metallurgy

22

F

341/1.1

C22F 3/00 (2006.01) C25D 21/12 (2006.01) G05F 1/445 (2006.01)

Patent

CA 1146237

ABSTRACT OF THE DISCLOSURE A system for generating and autocontrolling the voltage or current wave form in a process for the electrolytic colouring of anodized aluminium includes feeding power from a source of symmetrical direct current, with a neutral connection directly coupled to a load, while the positive and negative voltages supplied by the source pass through a power control stage which is controlled by a bipolar operational amplifier. The bipolar operational amplifier has two signal inputs, a positive or non- inverting input which is connected to a signal generator, and a negative or inverting input having a signal which corresponds to the signal which actually exists on the electrodes of the electrolytic bath. This signal is processed in a half-wave outer controller which is controlled by a programming system.

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