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Since the loss of input rectifying diode bridge in the conventional PFC circuit reduces the efficiency, the bridgeless PFC circuit has been proposed. However, the performances of EMC in some bridgeless PFC circuits are unsatisfactory. In order to improve noise performance, the noise mechanism should be investigated as the first step. In this study, common mode noise current of conventional bridge...
The proposed paper aims at characterizing the effect of thermal aging of a buck DC-DC converter on its electromagnetic emission and identifying the role of the different constituting components. An equivalent model is built to confirm the emission level increase induced by high temperature stress.
Planar spiral inductors made of a single-wall carbon nanotube (SWCNT) bundle are investigated in order to achieve higher values of the quality factor for high frequency automotive applications. The inductor is modeled as an equivalent circuit whose frequency dependent parameters are obtained by an analytical/numerical procedure. A sensitivity analysis to some design parameters is carried out for frequencies...
In recent times, more than 60 percent of the world's energy is used to drive electric motors. Because of the growing requirements of speed control, pulse width modulated (PWM) inverters are widely used in adjustable speed drives. Noise generated by PWM inverter fed AC motor drive systems causes severe parasitic current problems, especially at the cases of high frequency. This paper proposes two new...
The hand-held resonant magnetic field charger (HH-RMFC) is a convenient equipment of charging the batteries without any electrical contact. Due to high coupling coefficient of HH-RMFC, the single phase power inverter with square wave encounter relatively small reactance at its harmonic frequencies. Thus, the current flowing through the Tx and Rx windings can be distorted. The distorted current with...
To overcome power distribution network (PDN) design challenges such as serious power noise, large system area burden, the wireless power transfer (WPT) system in the 3D package and IC is applied. In this study, the 3D multi-helix inductor is proposed for designing the 3D package and IC with a WPT scheme and an equivalent circuit modeling is also implemented. The fabricated package WPT system represents...
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