Multiple coils design on eddy current brake type half circle slotted

Eddy Current Brake (ECB) is a contactless mechanical braking technology that uses the eddy current principle. This research discusses the ECB braking system using a unipolar electromagnet. This research aims to analyze the relationship between the braking torque value and the magnetic field generated by the influence of the magnetic core area on the ECB braking system. This research uses the Finite Element Method (FEM) in the ECB modeling process with a wide variation of the core area facing the conductor with two-sided and one-sided slots, namely 225, 375, 525, and 675 mm2 at variations in rotating speed of 150, 300, 450, 600, and 750 rpm. The results of the research showed that the wide variation of cores with an area of 675 mm2 produced the highest braking torque value on each conductor with two-sided or one-sided half circle slots. The resulting braking torque values were 93.52 Nm and 93.83 Nm at a rotating speed o f 450 rpm. From the results of this study, it can be concluded that the variation of the core area facing the conductor affected the value of the braking torque produced by the ECB, the more the surface area of the core facing the conductor, the greater the resulting braking torque.