Analytical study, design, and optimization of radial- ux PM limited-angle torque motors

• Published in: Scientia Iranica. Transaction D, Computer science & engineering, electrical engineering Vol. 29; no. 4; pp. 1975 - 1982
• Main Author: Yazdanpanah, R
• Format: Journal Article
• Language: English
• Published: Tehran Sharif University of Technology 01.08.2022
• Subjects: Actuators; Air gaps; Algorithms; Circuit design; Design; Design analysis; Design optimization; Equivalent circuits; Fluctuations; Mathematical analysis; Mathematical models; Model accuracy; Multiple objective analysis; Numerical analysis; Objectives; Rotors; Torque motors
• DOI: 10.24200/sci.2020.54929.3987

This paper presents an analytical study of radial-flux slotless limited-angle torque motors. The modeling is done based on the magnetic equivalent circuit of actuators and electromagnetic equations are employed to calculate the air-gap flux as well as the produced torque. This model is then used for designing actuators both in outer-rotor and inner-rotor structures, considering the design constraints and desired characteristics. Given that the objectives in the design stage are usually in conflict with each other, an intelligent multi-objective optimization algorithm is required to design the best-fit actuators. Analytical and simulated results are presented and compared to determine the accuracy of the model and verify the design equations as well as the design approach. Given that this type of actuators is the key element in industrial control, the contributions of this paper are focused on the new analytical field solution based on magnetic equivalent circuit, design, and optimization approach to radial-flux structure and introducing a general procedure that can be extended to similar structures and actuators.