USE OF TIME-VARIABLE MAGNETIC FIELD IN HEATING

Variable magnetic fields are widely used in energy production. Two methods can be applied to make the magnetic field variable. The first of these is to apply an alternating current to the insulated conductor on the outer surface of a core. The other is to rotate the permanent magnet. According to Faraday's induction law, the circular current generated in the conductors when the magnetic field changes is called the eddy current. Eddy current flows in a closed loop in planes perpendicular to the magnetic field. Eddy current can be generated by a time varying magnetic field in a constant conductor or by a moving conductor with respect to a fixed magnet. The magnitude of the generated current is proportional to the magnitude of the magnetic field, the area of the frame, the amount of instantaneous change of the magnetic flux in the frame, and is inversely proportional to the internal resistance of the active material. The need for an energy source to change the direction of the domains in the iron causes an energy loss common to all machines and transformers. The energy hysteresis losses of an alternating current applied to an iron core for the directional change of the domains during each cycle are called the energy hysteresis losses. In this study, the use of the variable magnetic field generated by a permanent magnet in heating systems has been investigated. It is also aimed to reduce heating costs with this method. Undesired but unobstructed eddy currents and hysteresis are used to achieve the purpose of the work. In addition, the strong magnetic effect of the permanent magnet materials, the variable magnetic field of the rotating disks, and the non-magnetic but electrically thermally conductive copper used as the material to be heated.