proposal of reduced parts slotless planar resolver

The recent development of 2-dof electrical machines leads to increasing need for 2-dof position sensors. using a planar sensor instead of two linear ones decreases the complexity, and cost of the employed drive. therefore, in this paper a new slotless configuration is proposed for the planar resolver, that simplifies the manufacturing of the sensor. then, the optimal combination of the stator/mover number of coils is determined based on the proposed analytical model. finally, to reduce the number of integrated parts of the proposed resolver, a new configuration with skewed coils is proposed. the success of the developed model and the presented configuration is validated using three-dimensional finite element analysis.