the motor with opposite magnetic polarities as shown in fig1 the permanent magnets are positioned on the rotor 2 so that they are symmetrically arranged with respect to the system 39 s coil 5 and its soft ferromagnetic core 4 in the direction of the system 39 s axis that is the permanent magnets exist on the x plane with the shaft being positioned in the y plane as per the x y plane identifier 14 in fig5 a counterbalance 11 of brass material of the same weight 11 8 g as the two permanent magnets 3 is added to the system 39 s rotor approximately 180 degrees away from the permanent magnets again positioned in the symmetric manner as the permanent magnets 3 with respect to the direction of the system 39 s axis the soft ferromagnetic core 4 is a sintered ferrite with a composition of manganese and zinc from magnet sales of swindon united kingdom part number rdsf01556 it is of length 9 45 mm and it is cut down to 8 7 mm to sit substantially within the electromagnetic coil 39 s 5 core the electromagnetic coil 5 is wound with insulated and bonded copper wire of 25 american wire gauge awg with a core diameter of 9 6 mm and a total of 360 turns in fig6 the direction of the angular displacement 12 is shown as the system 39 s rotor 2 travels on this angular displacement it will come into an angular range where the magnetic field.