Article ID Journal Published Year Pages File Type
660931 International Journal of Heat and Mass Transfer 2010 10 Pages PDF
Abstract
This article explores the effect of the design of the multi-layered coil on the efficiency and uniformity of high-frequency electromagnetic induction surface heating. This work aims to improve the non-uniform temperature distribution of the cross and depth sections of a heated target that is produced by the approximate and skin effects, which often occur in induction heating using a conventional single-layered coil. The goal is to heat rapidly and uniformly the surface of a target. An injection mold plate is used as the target of induction heating; this investigation first utilizes multiple physical coupling analyses in ANSYS software to predict the temperature profile in the various layers of a coil. The Taguchi method and principal component analysis (PCA) are then adopted to determine the best combination of process parameters with a two-layered induction coil. The effects of the multi-layered induction coils on the heating history are further examined, and are compared with those of the single-layered coil in terms of the duration of heating required to yield a surface temperature of over 100 °C and the largest heating area at uniform temperature. The experimental results show that the multi-layered coil heats to a uniform temperature more efficiently than the conventional single-layered coil, and the temperature varies within 5 °C even upon heating to 190 °C.
Related Topics
Physical Sciences and Engineering Chemical Engineering Fluid Flow and Transfer Processes
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