Loading...

Electrical and Eccentricity Fault Diagnose in Wound Rotor Resolvers

Lasjerdi, Hamed | 2019

568 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53623 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri Gheidari, Zahra; Totonchian, Farid
  7. Abstract:
  8. Resolver is the recommended position sensor in harsh environments where there is wide temperature variation, vibration, and dust. Resolvers are divided into two groups: Wound-Rotor (WR) resolvers and Variable Reluctance (VR) ones. The most commercial resolvers are WR resolvers that they have 2-phase, orthogonal, signal windings on their stator and a single-phase excitation winding on their rotor. Due to the electromechanical structure of the resolver, the mechanical and electrical faults of electrical machines are expected in resolvers. Therefore, in this dissertation, the effect of mentioned faults in WR resolvers was investigated.In this dissertation, a non-invasive method with the help of winding function model is proposed to detect static and dynamic eccentricity fault. The proposed method determines the static and dynamic eccentricity level with high accuracy and high speed. Also, the location of the minimum air gap length in the static eccentricity is determined with two search coils. Finally, the proposed methods are validated using the finite element method. Another fault that has been investigated is inter-turn short circuit fault (ITSCF). Again, the winding function method is used for modeling the resolver under ITSCF. With proposed model, the effect of fault location, phase of the ITSCF and the number of shorted turns are investigated. Then methods are provided to reduce or compensate the position error under ITSCF.Finally, the experimental test on the prototype resolver is used to evaluate the simulation results under electrical and mechanical fault
  9. Keywords:
  10. Resolvers ; Electrical Faults ; Wound-Rotor Resolver ; Modified Winding Function Method ; Static Eccentricity ; Dynamic Eccentricity

 Digital Object List

 Bookmark

No TOC