Fig. 7 shows, that the position angle can be estimated under no load condition with an accuracy of 2 %. Without me- chanical load only the rotor flux contributes to the saturation of the stray paths. With increasing mechanical load the im- pact of the fundamental current is grows. The orientation of the anisotropy detected by the tracking controller is shifted, which results in a constant error of the angleΔδ caused by shifting the saturation maximum by the torque producing current isq. This disorientation, however, can easily be com- pensated by a simple linear adaptation to the torque produc- ing (load) current.