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Analytical Modelling and Optimization of Disk Type, Slot Less Resolver

Moheyseni, Atefeh | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53429 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri Gheidari, Zahra
  7. Abstract:
  8. Resolvers, due to their robust structure, are widely used in automation systems. Among the types of resolvers, the accuracy of the Wound Rotor (WR) resolver in the occurrence of common mechanical errors is higher than other types of resolvers. therefore, in this thesis, an AFWRR is studied to improve the performance. Increasing the number of poles in WR resolvers is a good solution for increasing the accuracy of these electromagnetic position sensors. However, high-speed WR resolvers due to employing fractional slot windings suffer from rich sub-harmonics in the induced voltages. A common solution for suppressing the undesirable sub-harmonics is using multi-layer winding with appropriate shifting between layers. However, that shifting angle is limited by the slot pitch. To overcome the mentioned deficiency, in this thesis, a slotless configuration is proposed. Then, an optimization based on the winding function model of the sensor is carried out to achieve an optimal winding’s configuration. 3-D time-stepping Finite Element Method (FEM) is used to verify the success of the proposed analytical model and the performed optimization. Finally, a prototype of the optimal configuration is built for experimental measurements. Also, in this thesis, the effect of the shape of the coils on the performance of the slotless resolver has been investigated
  9. Keywords:
  10. Wound-Rotor Resolver ; Axial Flux Wound Rotor Resolver ; Fractional Slot Concentrated Winding ; Three-Dimensional Finite Element Analysis ; Optimum Angle ; Analytical Modeling

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