volume | PIER Journals

Abstract

This paper presents an innovative magnetic gearbox with a three-rotor coaxial structure capable of providing a single input and dual identical outputs. The low-speed rotor magnets of this gear are flux-focusing, while the high-speed rotors magnets are surface-mounted. The performance of this gear was analyzed using finite element analysis. Initially, the gear with initial dimensions was modeled and simulated in ANSYS/Maxwell software, and the results of static and time-dependent analyses were examined. Subsequently, a parametric study of the gear was conducted to investigate the impact of geometric dimension variations on rotor torques and volumetric torque density. The optimal dimensions for achieving the highest volumetric torque density were then selected. The gear was then simulated with the final dimensions, demonstrating that this multi-rotor design is capable of achieving high torque densities (291.61 Nm/L in this gear). Following this, the proposed magnetic gear was compared with another gear of similar dimensions but with three flux-focusing rotors. Additionally, the slicing method was employed for the high-speed rotors magnets to reduce cogging torque, and it was shown that this method successfully reduces the cogging torque of the gear's rotors.

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Dr. Ali Hosseini-Fard

Dr. Seyed Hamid Shahalami

Dr. Esmaeil Fallah Choolabi