Abstract:
Resolvers have robust performance in harsh environments due to their electromagnetic structure. Among different types of resolvers, variable reluctance (VR) ones suggest ...Show MoreMetadata
Abstract:
Resolvers have robust performance in harsh environments due to their electromagnetic structure. Among different types of resolvers, variable reluctance (VR) ones suggest higher reliability, simpler configuration, and lower cost. The same features are available for their linear counterparts. Since the application of linear machines is increasing, low-cost, high-precision linear position sensors attract more attentions. However, the accuracy of linear resolvers strongly influenced by longitudinal end effect and the edge effect. The edge effect can be suppressed using tubular configuration and the longitudinal end effect must be considered and suppressed in the design process. On the other hand, the requirements for low-cost applications are simple configuration and easy manufacturing process. Therefore, in this article, a simple configuration, with nonoverlapping, constant-turn winding is proposed for linear tubular VR resolver. The proposed resolver works based on the sinusoidal variation of common area between the stator’s and mover’s iron parts. The accuracy of the proposed sensor is studied considering different configurations: long stator/mover and inner stator/mover. Afterward, a compensation method employing particle swarm optimization (PSO) optimization algorithm is presented to omit the longitudinal end effect of the selected structure. Finally, the compensated tubular resolver is built and tested. The deviation results approve the success of the proposed design and the applied optimization.
Published in: IEEE Transactions on Instrumentation and Measurement ( Volume: 72)