Recently, T-shaped Magnetorheological Brake (MRB) usually utilize more than one wire coil electromagnetic to maximize magnetic flux reaching all Magnetorheological Fluid (MRF) gaps. This research was focused on the usage of a single wire coil on MRB with uniformly magnetic flux distribution. To achieve the goal, the serpentine magnetic flux profile was adopted to maximize all MRF gaps that only use a single coil. Firstly, the magnetic circuit which implementing serpentine magnetic flux was design in a two-dimensional model. It was then followed by magnetostatic simulation using Finite Element Method Magnetics (FEMM) to determine the amount of magnetic flux density. The data were then employed to calculate the braking torque. After having the final dimension and completing the workshop drawing, an MRB prototype was fabricated. Thus, the prototype was characterized using the braking test apparatus to figure out the torque profiles. Moreover, the experimental results were compared to the simulation results. This process justified the validity of the proposed mathematical model of the T-shaped MRB. It was investigated that the maximum braking torque from simulations and experimental works were 1.51 Nm and 1.91 Nm at 1 A, respectively. Overall the between differences of simulations and experimental works were about 10%. It is therefore, the mathematical model can be used for further application in the actuator control system.

Serpentine flux T-shaped magneto-rheological brake (MRB) featuring a single coil has been proposed for reducing the needs of coil that usually implemented in conventional T-shape MR brake. Here, the use of serpentine type magnetic flux flow is the key to coil reduction. The prototype was designed and fabricated in the laboratory. The design covers analytical torque prediction, magnetic circuit simulation, and workshop drawing. While the fabricated prototype was characterized using MRB test rig equipped with torque and angular velocity sensors. The experimental work was carried out in constant speed and constant current. The torque using the analytical approach and experiment result respectively was 1.51 Nm and 1.91 Nm at 1 A current supplied. Based on the comparison between prediction and experiment results, it could be seen that the highest difference was about 20.