Abstract
Induction heating (IH) is a process of heating the electrically conducting materials especially ferromagnetic materials with the help of electromagnetic induction through generating heat in an object by eddy currents. A well-entrenched way of IH is to design a heating system pertaining to the usage of ferromagnetic materials such as stainless steel, iron, etc., which restricts the end user’s choice of using utensils made of ferromagnetic only. This research article proposes a new scheme of induction heating that is equally effective for heating ferromagnetic and non-ferromagnetic materials such as aluminium and copper. This is achieved by having a competent IH system that embodies a series resonant inverter and controller where a competent flexible load modulation (FLM) is deployed. FLM facilitates change in operating frequency in accordance with the type of material chosen for heating. The recent attempts by researchers on all metal IH have not addressed much on the variable shapes and sizes of the material, whereas this research attempts to address that issue as well. The proposed induction heating system is verified for a 2 kW system and is compatible with both industrial and domestic applications.
Highlights
The results clearly demonstrate that the system worked efficiently both in ferrous and non-ferrous heating modes
A half-bridge series resonant inverter with a modified version was proposed for heating ferromagnetic and non-ferromagnetic pans [11], which operated in two operating modes such as first-harmonic and third-harmonic operating modes, and when compared with [12], it had reduced circuit components but still consisted of a rectifier
The proposed structure was an optimal one that catered to two important traits of induction heating system—namely, variable load and variable size
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Heat energy is produced by burning combustible substances, which results in energy wastage and environmental deterioration. Over the years, these drawbacks forced researchers to invent new heating methodologies. Induction heating (IH) methods based on magnetic coupling have evolved tremendously because of their innate advantages such as no leftovers, cleanliness, safety, and high efficiency [1,2,3]
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