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Optimal Design and Prototyping of 2 Degree of Freedom Resolver

Zare, Fatemeh | 2022

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 56123 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri Gheidai, Zahra
  7. Abstract:
  8. Position sensors are an inevitable part of motion control mechanisms with inverter-driven electric machines. Encoders and resolvers are two common types of position sensors. Resolvers are preferred over encoders due to their superior performance in polluted and noisy environments with wide temperature variation or high vibration. Conventional resolvers are synchronous generators whose excitation winding is fed by an AC instead of a DC voltage. There are different types of resolvers for determining position in linear or rotational motions. However, increasing usage of two-degree of freedom (2-DOF) motors for simultaneous rotational and linear motion leads to request for helical motion position sensors. Employing such resolvers reduces the complexity and volume of the control system. Therefore, in this thesis design, analysis and prototyping of 2-DOF resolvers are considered. The first proposed sensor has a wound rotor configuration. The design algorithm, as well as design optimization for reducing the influence of longitudinal end effect is discussed for the proposed resolver using Magnetic Equivalent Circuit Model. Then, a prototype sensor is built and tested. Both the theoretical analysis and experimental results verify the effectiveness and reasonability of the proposed structure. However, the complexity of the manufacturing process leads to propose other configurations. In this regard, half-rotor, half-stator, and helical winding configurations are proposed. Then, for further simplifying the experimental building of the sensor, different variable reluctance (VR) configurations are presented. Finally, the optimal VR configuration is built and tested to verify the superior performance of the proposed VR sensor
  9. Keywords:
  10. Wound-Rotor Resolver ; Variable Reluctance Resolver ; Finite Element Simulation ; Two Degree of Freedom Simulator ; Two Degree of Freedom Resolvers

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