System for generating and autocontrolling the voltage or current wave form applicable to processes for the electrolytic coloring of anodized aluminium
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United States of America Patent
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Jul 6, 1982
Grant Date -
N/A
app pub date -
Oct 11, 1979
filing date -
Oct 31, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for generating and autocontrolling the voltage or current wave form in a process for the electrolytic coloring 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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