Power Curve-Fitting Control Method with Temperature Compensation and Fast-Response for All-Metal Domestic Induction Heating Systems

Sang Min Park,Byoung Kuk Lee,Dongmyoung Joo,Eunsu Jang

doi:10.3390/en12152915

Sang Min Park, Byoung Kuk Lee + Show 2 more

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https://doi.org/10.3390/en12152915

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Abstract

Typical domestic induction cooktops can only heat ferromagnetic pots/vessels. However, to increase the availability and marketability of induction heating (IH) cooktop products, heating techniques for all types of metallic pots (i.e., created from metals such as aluminum, copper, and stainless steel) are required. To satisfy the requirements of induction cooktops, this paper proposes the design of an all-metal domestic IH system that can heat any type of metallic pot while considering the temperature variation of the working-coil. A control algorithm using a power curve-fitting method (CFM) is presented to quickly respond to load parameter variations in the IH. In addition, the CFM control algorithm is established to compensate for the power reference value by reflecting the increase in the working-coil temperature during the heating of the non-ferromagnetic pot. To evaluate the performance of the proposed system, the control algorithm strategy and experimental results based on a 3.2 kW all-metal IH cooktop are presented.

Highlights

With the increasing awareness of stability and environmental issues, domestic cooktops that employ induction heating (IH) methods have gained popularity worldwide
To increase the availability and marketability of induction cooktops, recent studies have focused on the development of an all-metal IH cooktop that is capable of heating any type of metallic pots
The load modeling for the proposed system was performed after analyzing the parameters of the pot material and the variability according to the misalignment between the center of the working-coil and the pot, based on the designed working-coils for the all-metal IH system

Summary

Introduction

With the increasing awareness of stability and environmental issues, domestic cooktops that employ induction heating (IH) methods have gained popularity worldwide. A typical induction cooktop that is used in a home can only heat ferromagnetic pots/vessels [1,2]. Conventional induction cooktops exhibit a disadvantage as non-ferromagnetic pots (made of aluminum, copper, and stainless steel), which are widely used in homes, cannot be heated, and only specific pots where the entire pot or only the bottom surface is made of a ferromagnetic material can be heated [3,4,5]. Because non-ferromagnetic pots have very low relative permeability and resistivity, it is difficult to heat them with conventional IH technology. To increase the availability and marketability of induction cooktops, recent studies have focused on the development of an all-metal IH cooktop that is capable of heating any type of metallic pots

Methods

Results

Conclusion