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There are two commonly used 3-phase configurations in power grid applications, the 3-phase 3-wire, and 3-phase 4-wire configurations. The 3-phase 4-wire power converter systems is necessary to supply single-phase loads but at the expense of higher output harmonics and losses, as compared to 3-phase 3-wire systems. The neutral inductor is added to reduce the neutral line harmonics and a LCL+ L filter...
Power quality and electromagnetic interference (EMI) control are mandatory for any grid-connected power converter. This paper describes a procedure for LCL filter design in a grid-connected high power density converter (HPDC) with the objective to meet both power quality and EMI requirements. The performance of the LCL filter is simulated and then validated experimentally.
With increasing consumer's demand and technological advancement for automotive electronic systems, it is becoming a challenge to ensure good compliance for high speed design (signal and power integrity) and electromagnetic compatibility. In this paper, the effects of high frequency switching noise from an automotive cluster coupling into a TFT display module, causing undesirable radiated emissions...
Common mode (CM) and differential mode (DM) conducted emissions without the line impedance stabilization network (LISN) is investigated from the perspective of CM and DM impedances. Using a switched-mode power supply (SMPS) as an equipment under test (EUT), the in-circuit CM and DM impedances of the actual measurement setup with and without LISN are extracted so that the deviation of conducted emission...
This paper presents a filterless Class-D amplifier with pseudorandomized carrier frequency modulation (PRCFM) to mitigate electromagnetic interference (EMI) issue associated with the removal of an off-chip LC filter. The designed filterless Class-D amplifier occupies a total area of 1 mm and is fabricated in 0.18-μm CMOS process technology. The proposed PRCFM circuit occupies only less than 1%...
In today's high-speed board design, decoupling using on-board capacitors are necessary to provide stable DC power and to suppress radiated emission from the board. At the higher frequency beyond 300 MHz, one has to rely on the capacitance offered by the power-ground plane pair in multi-layer stackup to provide effective decoupling. This paper provides an in-depth analysis on the suppression of board...
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