Helical Motion Wound-Rotor Resolver

In this paper an integrated core, high reliability, linear-rotational resolver with a simple slotless configuration is proposed. The moving part of the proposed resolver has only one helical winding. While, its stator needs at least two individual windings to be able to determine the linear and angular position in simultaneous linear and rotational, helical, motions. Three different configurations are proposed for the stator’s windings: (1) helical and horizontally skewed winding (2) helical and vertically skewed winding (3) horizontally and vertically skewed windings. The influence of the mentioned configurations is discussed in the terms of sensor’s accuracy in independent and simultaneous linear and rotational motions. Furthermore, a decoupling technique is proposed for the helical motion. All the studies are done using three-dimensional (3-D) time stepping finite element method (TSFEM).