Impact of Structural Parameters on Disc-Type Magnetorheological Brake Performance
DOI:
https://doi.org/10.3849/aimt.02072Keywords:
magnetorheological brakes (MRBs), Finite Element Method (FEM), torque-to-volume ratio (T/V)Abstract
This study investigates the electromagnetic and braking performance of a disc-type magnetorheological brake (MRB) using MRF-140CG fluid. A 3D finite element model (Altair Flux) analyzes torque generation under varying excitation currents, fluid gaps, rotor thicknesses, and wire diameters. Results show torque increases with current, limited by saturation. An optimal design with a 0.75 mm fluid gap and 25 mm rotor thickness yields a maximum torque of 191 N·m and a peak torque-to-volume ratio of 61.6 N·m/dm³ at 3 A. Additionally, smaller coil wire diameters improve torque output. These findings provide essential quantitative guidelines for designing compact, high-efficiency MRBs.
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