A novel coil shape for transverse flux induction heating

The main disadvantages of transverse flux induction heating (TFIH) is the resulting inhomogeneous temperature distribution on the surface of the strip cross-section at the inductor outlet, which limit its industrial application. The coil geometry and the position of the coil edges relative to the work piece width mainly influence the distribution of the eddy current, temperature and the electromagnetic force. For solving this problem, a novel coil distribution of the inductor is presented in this paper, and the two typical coil structures at the same the input current, heating strip and air-gap are compared. The magnetic flux density, eddy current, heat source and temperature distribution of the moving strip obtained by finite element method have confirmed positively the feasibility of the proposed model in solving the problems of inhomogeneous temperature distribution and low efficiency. Simulation results provide a theoretical basis for the new type of TFIH device.