may be provided with several portions of the same conductor 4 the additional yoke 9 may also comprise more than one groove 11 for one phase in which case each groove 11 is provided with one or more portions of the same conductor 4 the inductor arrangement according to the invention may comprise more than one additional yokes in addition to an additional yoke 9 placed adjacent to the upper yoke 7 another additional yoke may be provided that is placed adjacent to the lower yoke 8 the additional yoke placed adjacent to the lower yoke 8 may be similar to the additional yoke 9 placed adjacent to the upper yoke 7 it is obvious that all additional yokes are placed adjacent to the conductors 4 of the output of the frequency converter if an additional yoke is thus placed adjacent to the lower yoke 8 then a portion of the conductors 4 is placed between the lower yoke 8 and the additional yoke the grooves 11 in which the conductors 4 of the output side are placed can be formed in the inductor arrangement according to the invention in the additional yoke or in the yoke of the core element 1 of the input inductor it is also possible to provide an inductor arrangement in which both the additional yoke and the yoke of the input inductor comprise grooves 11 arranged to receive the conductors 4 the inductor arrangement in which the grooves of the conductors 4 are placed in the yoke of the input inductor can be implemented without the additional yoke 9 or with the additional yoke 9 the inductor arrangement according to the invention is applicable to be used with such electrical apparatuses that provide interference of the above mentioned type typical for the frequency converters.