Research On Coil Shape Analysis For Transverse Flux Induction Heater And Its Coupled Field Analysis Method

Compared with longitudinal flux induction heating equipments,the appliances of transverse flux induction heating(TFIH)use lower frequencies,so the reactive power is less and energy is saved.The TFIH geometry in which the work piece is not encircled,is particularly suitable for continuously heating process.But at this stage,the main disadvantage of TFIH is the resulting inhomogeneous temperature distribution on the surface of the strip cross-section at the inductor outlet,which limits its industrial application.In this paper,the THIF couple field is analyzed,and the inductor geometry is optimized.On the basis of the traditional rectangular shape coil and diamond shape coil,the advantages of two methods are combined,a hexagon coil shape is presented.The simulations have confirmed positively the feasibility of proposed coil shape in obtaining the homogeneous temperature distribution.It provides an accurate reference on the design of new THIF equipment.Due to the temperature change,the local material properties of the strip are not invariant,especially the ferromagnetic material properties vary sharply near the Curie point.An improved simulation method for moving strip of TFIH considering material property variation is proposed.The temperature distribution obtained from the proposed method is compared with that from the method without considering material properties change.The outlet temperature is lower when considering the strip parameters change.