Method for trickle impregnation of a stator or armature of an electric machine with a synthetic resin which cures under a temperature increase, comprising the following steps: a) heating the stator or armature from an initial temperature to a trickle temperature range (T2-T3) of the synthetic resin, which is initially still liquid, in a first time period (tO-tl), b) keeping the temperature constant in the trickle temperature range (T2-T3) and introducing the still liquid synthetic resin into the stator or armature in a second time period (t1-t2), c) heating the stator or armature to a curing temperature range (T4-T5) in a third time period (t2-t3), d) keeping the temperature of the stator or armature constant in the curing temperature range (T4, T5) in a fourth time period (t3-t4) and setting and curing the synthetic resin to form a thermoset, and e) cooling the stator or armature after the end of the fourth time period (t3-t4), the stator or armature being arranged in an impregnation device during the introduction of the liquid synthetic resin, and the trickle temperature range (T2-T3) comprising lower temperatures than the curing temperature range (T4-T5), the stator or armature being inductively heated by means of an inductor (6, 6 ∗), the inductor (6, 6 ∗) being moved back and forth between at least two axially spaced positions (A, B), coaxially to the longitudinal axis of the stator or armature, during method steps a) to d), characterized in that the inductor (6, 6 ∗) is in operation when it approaches an axial end of the stator or armature, in that the inductor (6, 6 ∗) is switched off when this axial end is reached, and in that the inductor (6, 6 ∗) is only put back into operation when it has again left this end region of the stator or armature by a predetermined distance. a) heating the stator or armature from an initial temperature to a trickle temperature range (T2-T3) of the synthetic resin, which is initially still liquid, in a first time period (tO-tl), b) keeping the temperature constant in the trickle temperature range (T2-T3) and introducing the still liquid synthetic resin into the stator or armature in a second time period (t1-t2), c) heating the stator or armature to a curing temperature range (T4-T5) in a third time period (t2-t3), d) keeping the temperature of the stator or armature constant in the curing temperature range (T4, T5) in a fourth time period (t3-t4) and setting and curing the synthetic resin to form a thermoset, and e) cooling the stator or armature after the end of the fourth time period (t3-t4), the stator or armature being arranged in an impregnation device during the introduction of the liquid synthetic resin, and the trickle temperature range (T2-T3) comprising lower temperatures than the curing temperature range (T4-T5), the stator or armature being inductively heated by means of an inductor (6, 6 ∗), the inductor (6, 6 ∗) being moved back and forth between at least two axially spaced positions (A, B), coaxially to the longitudinal axis of the stator or armature, during method steps a) to d), characterized in that the inductor (6, 6 ∗) is in operation when it approaches an axial end of the stator or armature, in that the inductor (6, 6 ∗) is switched off when this axial end is reached, and in that the inductor (6, 6 ∗) is only put back into operation when it has again left this end region of the stator or armature by a predetermined distance.