We present a model for the generation of magnetic fields in fully convectiv
e pre-main sequence stars. The dynamo process in this type of star is of al
pha(2)-type and hence quite different from the solar dynamo. Based on a mea
n field model of the turbulent electromotive force, the nonlinear induction
equation is solved in three dimensions to allow for non-axisymmetric solut
ions. The resulting magnetic held is purely non-axisymmetric and steady.