subtracting unit 191 outputs a corresponding current error u03b4i i avg u2212 i to a deadband unit 192 that only lets current error values through that have a magnitude above a predetermined threshold value a gain is applied to the output from the deadband unit 192 by a gain unit 193 and the corresponding output is fed to a saturation unit or limiter 194 that limits the resulting voltage correction to a predetermined range the final feedback compensation output 195 is representative for the current error i e the difference between the average current i avg and the phase current in the converter module or in other words it is representative for an amount of correction that is to be applied to a corresponding control value that determines the current output from the converter module thus the feedback compensation output 195 is fed to adder unit 196 where it is added to the phase voltage demand input value v di the result is a compensated phase voltage demand output value v di that can be fed to the converter module in short the closed loop system 190 operates to bring the phase current i in the converter module as close as possible to the average current i avg in all the converter modules such that balanced operation can be achieved where all converter modules produce approximately the same output current shared current fig2 a 2d illustrate various errors occurring during different stages of converter module operation more specifically the semiconductor components igbts and anti parallel diodes of one half bridge and a plot of expected and actual output voltage are shown in four situations a b c and d in which the output current commutates between top and bottom semiconductor components in the.