Analysis of radiated EMI in single switch ZVS applied to induction cooking

Abstract

In this paper the radiated EMI generated by a single switch ZVS inverter in the non-optimal mode operating conditions, including a current peak reduction methods are analysed. These methods consist of applying a burst pulse at begin of the control signal in order to force the transistor to work in the ohmic region. The objective of this paper is evaluated to be the best way to apply the current peak reduction method without to radiate EMI performance degradation. According experimental results, when the burst pulse is modulated in frequency, an amplitude attenuation of far-field emission is observed.