Abstract—The main topic of this paper are the EMI reduction problems in high voltage power converters with 6.5 kV IGBTs. The generation process of electromagnetic interference is briefly analyzed, some EMI reduction methods are introduced. Theoretical analysis, calculation and experimental results of choosing the snubber circuit for minimization of parasitic ringing are described. The effect of...

Power Electronics have proved itself as an encompassing field for power generation and 1IlaI1ag4:me Traditionally conversion of ac to de vo~es has been dominated by phase controlled or diode rectifiers. The ideal character of the input current draWnby these rectifiers creates number of problems like increase in .. power, high input current harmonics and low input power factor, lower rectifier e...

This article introduces a novel version for implementing current-mode precision full-wave rectifier and class B push-pull current amplifier. The features of the proposed circuits are that: it can rectify and amplify current signal with controllable output magnitude via an input bias current: the output current save ideally free from temperature variation. In addition, direction of the output cu...

AC-DC single-stage converters are attractive because of their simplicity. The conventional power electronics converters used for such application have two stages, a diode bridge rectifier at the front end followed by a dc-dc boost converter. However, the extremely low output voltage of electromagnetic microgenerator does not allow diode bridge rectification. Even if possible, the losses in the ...

Decarbonization is an ongoing issue in the shipping industry, and electric propulsion systems are being proposed as alternative solutions to satisfy this requirement. To answer fundamental questions of “Are green solution?” “Can DC distribution contribute decarbonization shipping?”, paper analyzed system electrical characteristics, economic feasibility, environmental evaluation for a full-scale...

In an electrical Power systems, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. Linear loads with low power factor (induction motor) can be corrected with a passive network of capacitors or inductors. The hysteresis current controller is used to track the line current command. Non-linear loads (rectifier) di...

Based on the traditional indirect matrix converter topology dual input dual output indirect matrix converter is proposed, but the conventional six-switch inverter, used in the singleoutput indirect matrix converter, is replaced by a nineswitch dual output converter. The matrix converter has several advantages over traditional rectifier-inverter type power frequency converters. It provides sinus...

Conventional AC/DC power converters that are connected to the line through full-wave rectifier draws a non-sinusoidal input current. These Harmonic currents flowing through the impedances in the electrical utility distribution system can cause several problems such as voltage distortion, heating, noises. These harmonics distort the local voltage waveform, potentially interfering with other elec...

The paper contains analysis of power factor correction circuits that is made in the context of elaboration of uninterruptable power supply system. Various correctors have been estimated analytically, by means of simulation and experimentally. The most significant attention has been paid to the efficiency of the analyzed converters and their compatibility with modular approach to development of ...

Power quality standards (IEEE-519) compel to limit the total harmonic distortion (THD) within acceptable range caused by rapid usage of power electronic equipment. This paper envisages on the simulation of instantaneous active and reactive theory based shunt active filter with MATLAB/Simulink, as a better solution for reduction of the harmonics.