The article presents the results of the impact of various geometric dimensions of torque in a complex motion electromechanical converter. The converter differs from the conventional radial structure motor in that it has two rotors, an inner and an outer, and excitation by a common stator which is located between them. The use of such a system introduces different size ratios relative to the normal external rotor motor. The result is that the shape of the torque curve of the outer rotor is different from the one in the internal rotor. This article presents a study on the impact of individual items in the course of time – this relied upon a comparison of several hundred configuration dimensions.