Domestic induction heating appliances are evolving from surfaces with three to five fixed cooking areas to flexible cooking zones. These are able to adapt to a number of vessels of any size and shape by using multiple coils. Some state-of-the-art induction systems make use of overlapped inductors in two layers, which combine the high efficiency of large inductors with the high flexibility of small adjacent coils. The main drawback of this concept is the unequal distance between different coils and the vessel, which implies that each coil presents a different impedance depending on its layer. This paper presents an induction system conformed by nonplanar inductors. These inductors are designed in such a way that they can be assembled in overlapping structures, while preserving equivalence among them, i.e., they all present the same impedance. This paper includes the finite-element method modeling of the nonplanar coil, an analysis on the an experimental verification.

中文翻译：

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非平面重叠电感应用于家用感应加热设备

家用感应加热设备正在从具有三到五个固定烹饪区的表面发展为灵活的烹饪区。通过使用多个线圈，这些能够适应任何尺寸和形状的许多容器。一些最先进的感应系统使用两层重叠的电感器，将大电感器的高效率与小相邻线圈的高灵活性相结合。这个概念的主要缺点是不同线圈和容器之间的距离不等，这意味着每个线圈根据其层呈现不同的阻抗。本文介绍了一种由非平面电感器构成的感应系统。这些电感器的设计方式使得它们可以组装成重叠结构，同时保持它们之间的等效性，即它们都呈现相同的阻抗。