کنفرانس بین المللی ماشین و محرکه های الکتریکی

صفحه اصلی / The 5th International Conference on Electrical Machines and Drives

Rotor Stack Length Optimization of Variable Reluctance Resolvers to Mitigate Inclined Rotor Fault

نویسندگان :

Davood Karamalian¹ Behrooz Majidi² Mohammadreza Moradian³

1- islamic azad university 2- islamic azad university 3- islamic azad university

کلمات کلیدی :

Position Error،Resolvers،Inclined Rotor،Stack length،Finite Element Method

چکیده :

Resolvers are essential components in close-loop control of electric motors which are widely used in electric vehicles, robotics, and aerospace applications. Among all types of resolvers, variable reluctance resolvers benefit from a robust configuration which makes them suitable in harsh, dusty and high-humid environments. However, their precision can be affected by mechanical faults such as rotor inclination. To mitigate the effects of this fault, this study investigates the optimization of rotor stack length to enhance resolver’s accuracy under this faulty condition. In this paper, first an overview of resolver operating principles is presented, followed by an analysis of rotor inclination fault and its origins. Then Finite Element Method (FEM) simulation is used to model the inclined rotor fault. The resolver's performance is then analyzed using MATLAB by varying this parameter to determine the optimal rotor stack length which can create minimal position error. A prototype resolver with optimized rotor length is prototyped and tested. The results indicate that increasing the rotor stack length by 1mm reduces position error up to 38.14%.