The Human Exposure Assessment of Magnetic Field From an Induction Cooktop Using Coupling Factor Based on Measurement Data

Abstract

In this paper, the human exposure to the magnetic field from a household induction cooktop is assessed using two different methods. For the first method, the magnetic field from an induction cooktop is measured and compared with the reference levels (RLs) in the EMF (electromagnetic fields) guidelines. For the second method, coupling factors are calculated by simulations of 3-D human models and equivalent sources according to the IEC 62311 standard. The equivalent sources are obtained based on the non-uniform spatial distribution of the measured magnetic fields. Using the coupling factor, the induced current density and electric field inside the human body are estimated, and compared with basic restrictions (BRs) in the EMF guidelines. The exposure indices are calculated for both methods and the results are compared. Also, the possibility of overestimation is investigated when the measured magnetic field is compared with the reference levels.