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Design and Prototyping of Multi-Turn Wound Rotor Resolver

Hajmohammadi, Saeed | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53108 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri-Gheidari, Zahra; Tootoonchian, Farid
  7. Abstract:
  8. Resolver is a position sensor that is suited to be used in polluted environments with wide temperature variation, and high vibration. An important factor to determine the accuracy of resolver is its number of windings’ pole pairs that so-called “Speed” of resolver. Higher speed resolvers have higher accuracy in the price of losing absolute position information. Therefore, multi-turn resolvers are employed to have the high accuracy and high reliability along with absolute position information simultaneously. Multi-turn resolvers are consisted of two individual resolvers with different speeds in a common frame. In this thesis design considerations of multi-turn resolvers include proper slot-pole combination, winding configuration of stator and rotor, the layout of different resolvers and rotary transformers in a common frame, and the optimal distance between two sensors in the frame are discussed, at first. Then, an optimal configuration is proposed to achieve minimum cost and minimum flux interference between resolvers. Afterwards, two novel configurations, double sided multi-turn resolver and multi-turn resolver with a common core are proposed with the aim of reducing the multi-turn sensor’s volume. The performance of the proposed configurations is evaluated and optimized using an analytical model based on magnetic equivalent circuit (MEC). Finally, the prototype of optimal configurations are built and tested. Close agreement between the results of experimental tests and those of proposed analytical model and finite element analysis confirm the success of the proposed designes
  9. Keywords:
  10. Resolvers ; Finite Element Analysis ; Magnetic Equivalent Circuit (MEC) ; Flux Interference ; Multi-Turn Resolver ; Resolver Speed

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