System for the superposition of alternating current in electrolysis processes

A system to superimposing an alternating current to the direct current that feeds the electrolytic cells in a process of metals electrolysis wherein comprising:

• a. Two groups of cells, each group formed by at least one bar of anodes, one bar of cathodes and one of several anode-cathode bars wherein the connection between the anodes bar or the cathodes bar of the first group define a common connection point between the groups of cells;
• b. Two sources of direct current that supply that direct current to said group of cells, each source with a negative pole connected to the cathode bar of the respective group, and a positive pole, connected to the anode bar of the respective group;
• c. A bidirectional power converter that permits power to be transferred between both groups of cells, with three points for electrical connection, such that the first point of such converter is connected to said common point for connection of the groups of cells, the second point of connection of the converter being connected to the available bar between the cathode bar and the anode bar of the first group of cells, and the third point for connection of such converter being connected to the available bar between the cathode bar and the anode bar of the second group of cells;
• In a manner such that the cyclic and alternating operation of each power transference cycle between the groups of cells generates an alternating current superimposed to the direct current supplied by the sources of direct current.