Effect of Ferrite Core Modification on Electromagnetic Force Considering Spatial Harmonics in an Induction Cooktop

Sangjin Lee, Gyeonghwan Yun, Grace Firsta Lukman, Jang-Mok Kim, Tae-Hoon Kim and Cheewoo Lee ()
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Sangjin Lee: Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Republic of Korea
Gyeonghwan Yun: Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Republic of Korea
Grace Firsta Lukman: Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Republic of Korea
Jang-Mok Kim: Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Republic of Korea
Tae-Hoon Kim: H&A R&D Center, LG Electronics, Changwon 51533, Republic of Korea
Cheewoo Lee: Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Republic of Korea

Energies, 2024, vol. 17, issue 18, 1-19

Abstract: This study investigates the influence of ferrite shape modifications on the performance and noise characteristics of an induction cooktop. The goal is to optimize the air gap dimensions between ferrites and cookware, enhancing efficiency while managing noise levels. Using finite element method (FEM) simulations, we analyze the spatial distribution of magnetic forces and their harmonics. Eight ferrite shape models were examined, focusing on both outer and inner air gaps. Model #8 (reduced outer air gap) and Model #9 (reduced inner air gap) were experimentally validated. Noise measurements indicated that Model #8 reduced 120 Hz harmonic noise components, while Model #9 increased them due to enhanced excitation forces. Current measurements confirmed that Model #9 achieved higher efficiency, with RMS current reduced to 94.54% of the base model. The study reveals a trade-off between performance and noise: inner air gap reduction significantly boosts efficiency but raises noise levels, whereas outer air gap reduction offers balanced improvements. These findings provide insights for optimizing induction cooktop designs, aiming for quieter operation without compromising efficiency.

Keywords: induction cooktop; ferrite shape; FEM simulation; electromagnetic force harmonics; noise reduction; efficiency enhancement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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