Proposal of a Novel High-Accuracy and Robust Tubular Resolver With Simplified Structure

Abstract

This article introduces a novel tubular resolver designed to serve as an absolute linear position sensor. The resolver boasts a straightforward structure, employing a field coil positioned on a short-length mover for excitation, while signal coils are wound on the stator. Due to the limitations of 2-D finite element method (FEM) in modeling eccentric resolvers, a 3-D FEM approach is recommended for its modeling, despite the higher simulation time and computational intensity it entails compared to 2-D FEM. Thus, the proposed resolver is modeled using a 3-D modified winding function approach (MWFA), integrating numerical integration techniques to account for slot openings and end-effects in the model. Evaluation of the resolver's performance encompasses healthy and faulty scenarios, with a focus on accuracy assessment, particularly under static and dynamic eccentricities fault. The resolver demonstrates notable accuracy and robustness against mechanical faults, positioning it as an ideal linear position sensor for specialized industries such as vehicular, robotic, and mechatronics applications. The article highlights two key contributions: the proposed resolver design and the utilization of 3-D-MWFA, both introduced for the first time. Validation through experimental results confirms the effectiveness of the proposed resolver, reinforcing the credibility of the simulation outcomes.