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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 53598 (05)
- University: Sharif University of Technology
- Department: Electrical Engineering
- Advisor(s): Nasiri Gheidari, Zahra
- Abstract:
- Linear motors are mostly used in industrial applications and linear position sensors are one of the main components of their motion-control systems. The most common position sensors are optical encoders and resolvers. The optical encoders are not suitable for use in high temperature and high-vibration environments. In addition, their mechanical installation is difficult. In contrast, the resolvers are capable of generating absolute position signals with high precision, and low cost. Resolvers can be used in the polluted environments with the wide range of frequency, temperature and vibration. Among different linear sensors, linear resolvers are appropriate choice for harsh environments. Design optimization of linear resolvers needs an accurate, but computationally fast model for their performance prediction. Slotting effect of the cores and end effect are two important phenomena that must be accurately involved in the model to ensure its reliable results. Therefore, in this thesis a semi-analytical model based on subdomain modeling technique is proposed for linear resolvers. Then, according to the developed model, the induced voltages in the signal windings of the resolver is calculated and consequently, the position error of the resolver is determined. Numerical results are subsequently obtained by time stepping finite element method (TSFEM) to verify the proposed model. Finally, experimental tests on the prototype sensor are conducted to verify the success of the simulations
- Keywords:
- Analytical Modeling ; End Effect ; Finite Element Simulation ; Linear Resolver ; Subdomain Technique ; Linear Wound Mover Resolver ; Slotting Effect
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