STUDI GEJALA ARUS EDDY PADA PLAT ALUMUNIUM MENGGUNAKAN SOLENOID SILINDER

Abstract

Design and experiment of Eddy current on aluminium plat using solenoid havebeen carried out. Themagnetic field used is generated by two solenoids that connected with series and parallel combination.The solenoids were designed with a turns of 400, diameter of 3,8cm and length of 10cm.Neodymium IronBoron magnets (NdFeB)were used as a source of magnetic field for comparison.In order to obtain highervalue of the magnetic field, it is necessary to introduce ferromagnetic material (iron) as a core of thesolenoid. The value of the magnetic field was measured using Pasco PS-2162Magnetic Probe. Eddycurrents generated in the platare due to the change of magnetic flux as the plate moves back and forthbetween the magnetic poles. the magnetic field value of the solenoid was varied as a function of electriccurrent and distance. The dimension of the alumunium plate is 10cm in length, 6cm in width andextended witha stick having length of 20cm. The plates were designed with one slit, three slits, and fourslits and no slit. Solenoids with a ferromagnetic core were connected in series with a distance of 1.5 cmbetween them. The results show that the highest value of magnetic field (37.8851 mT ) was produced byapplying current of 7A on the circuit. Moreover, the number of oscillations of the plats is affected by themagnetic field strength and the number of strips on the plates. The more the number of strips on theplates, the more oscillations occur. This phenomenon is due to the cuts (strips) in the plate result in opencircuit reducing the Eddy current greatly. For oscillation by usingNdFeB, the number of oscillation wassignificant decrease.

Keywords: Eddy Curent, Solenoid, aluminum plate and magnetic field