Controlled current rise for pulsed electrochemical machining

This paper is concerned with the limits of the current rise in the PECM within the trans-passive potential range. One possibility is to reduce the connection inductances, in which case must be considered, however, that according to the feeder changed parasitic capacities also become effective. Limits are set concerning the structural adjustment if the working currents equal a couple of kiloamperes. Another option to decrease the rise and fall times are electronic solutions (ramp unit). A further advantage of this ramp unit is the fact that the current rise can be controlled without using additional great inductances. The preferences of this ramp unit as well as its controllability will be demonstrated with the help of practical applications.