Traveling Wave Induction Heating

The induction heating generates heat by means of Joule effect resulting from an eddy current. It is widely used in industrial operations due to its quick rate, high efficiency, precise control and low pollution properties. Traveling wave induction heating is a new induction heating way. Besides has the common induction heating characteristic, traveling wave induction heating has better edge effect, evener heat distribution, nearly balanced three-phase load of power network. It is a promising induction heating way. This paper analyses traveling wave induction heating used in heating steel plate.First, the characteristic, development and present research situation of induction heating are briefly introduced. The background of this project, the main contents and the significance of this paper are mentioned.Second, the electromagnetic field value computational method is introduced. A mathematical modal is developed to describe the distribution of electromagnetic field and eddy current density in work piece of induction heating. ANSYS software is also introduced, the mathematical modal of electromagnetic and temperature fields is presented by a complex magnetic vector potential, which is also applied to solve eddy current field in ANSYS software. Then, the electromagnetic field analysis, thermal analysis and coupled-field analysis in ANSYS are introduced.Third, the modeling of traveling wave induction heating is expatiated. The methods that realize the boundary conditions, modal mesh and material properties are given. The computation of power density distribution in the strip has analyzed under different power source frequency, different air gap size, different primary position as well as different coil structure, which is based on ANSYS software. Comparison of edge-effects of traveling wave and transverse flux induction heating is done.Finally, the summary of this dissertation is carried on and the future tasks on this project are pointed out.