کنفرانس بین المللی ماشین و محرکه های الکتریکی

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

A Robust Variable Reluctance Synchro Design for Operation under Static Eccentricity

نویسندگان :

Mohammad Ali Razavi¹ Zahra Nasiri-Gheidari² Farid Tootoonchian³

1- ُSharif University of Technology 2- Sharif University of Technology 3- Iran University of Science and Technology

کلمات کلیدی :

Compensation Winding،Eccentricity،Fault Tolerance،Finite Element Analysis (FEA)،Position Sensors

چکیده :

Variable Reluctance (VR) synchros are attractive for their simplicity and low cost but are highly sensitive to mechanical faults, where even minor static eccentricity can drastically degrade accuracy. This paper presents a novel passive compensation method that enhances the robustness of VR synchros against such faults. The proposed approach introduces a short-circuited compensation winding strategically placed on the stator teeth. Under eccentric conditions, this winding produces a corrective magnetic flux that counteracts field distortion, thereby significantly improving position accuracy. A major advantage of this technique is its versatility, as it can be integrated into both VR and wound-rotor sensors without altering their primary design parameters. The effectiveness of the proposed method is demonstrated through 2-D Finite Element Analysis (FEA) of a 12-slot, 5X VR synchro under 10% and 30% static eccentricity. The results show that the compensation winding reduces the Average Absolute Position Error (AAPE) by up to 40% under severe fault conditions. Experimental validation on a functional prototype further confirms the simulation results, verifying the effectiveness of the proposed fault-tolerant design.