Performance Analysis of Variable Reluctance Linear Resolver by Parametric Magnetic Equivalent Circuit in Healthy and Faulty Cases

Abstract

In this paper, the performance of Variable Reluctance Linear Resolver (VR-L-Resolver) with overlapping and non-overlapping windings is investigated by a novel parametric Magnetic Equivalent Circuit (MEC). The proposed MEC is capable of modeling various VR-L-Resolvers with arbitrary geometry and adjustable accuracy by changing the number of considered flux tubes. This technique is more suitable for modeling, analysis, and optimizing of the mentioned resolvers thanks to its flexibility and shorter processing time compared to the Finite Element Method (FEM). Moreover, it has the potential to model both healthy and faulty conditions by a unique model. Therefore, the resolver with two windings configurations under healthy and faulty cases are analyzed in this paper to study their performance. In faulty case, the inter-turn and asymmetrical air-gap faults are considered, and the position error is calculated for both cases. Finally, the MEC results are validated by 2D-FEM and experimental results to show the effectiveness of the proposed model. In general, applying a novel MEC-based modeling technique for the resolver sensitivity analysis, under mentioned faults and various windings configurations, is the main paper novelty.