EPQU Journal - Volume 12 Issue 1

Sensorless Control of Surface Mounted Permanent Magnet Synchronous Motors Using Matrix Converters

By Isabelle Heriakian / Published on Wed, 2006-05-03 00:00

This paper investigates the influence of the power converter on the performance of Surface Mounted Permanent Magnet Synchronous Motor drives, which employ High Frequency voltage injection to achieve low and zero speed control.  Experimental results demonstrate the remarkable performance of the sensor less speed and position control employing the Matrix Converter and the contributions of the Space Modulation Profiling technique.

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Currents Physical Components in Circuits with Nonsinusoidal Voltages and Currents - Part 2: Three-Phase Linear Circuits

By Isabelle Heriakian / Published on Thu, 2006-05-11 00:00

This paper summarizes the present state of discussions on power phenomena, power definitions and compensation in three-phase three-wire linear circuits with nonsinusoidal voltages and currents. In particular, definitions of the arithmetic and geometric apparent powers are discussed. It is shown that these two powers result in an erroneous value of power factor of unbalanced loads even if voltages and currents are sinusoidal. A reasoning that leads to a right selection of the apparent power definition is presented as well.

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Sampled Method of Active Power Filter Control (Part II)

By Isabelle Heriakian / Published on Wed, 2006-05-10 00:00

The aim of the paper is to demonstrate how to use sampled method of control of a shunt active power filter to maintain invariable power of a supplying voltage source, even though the supplied load varies randomly. The definition by S. Fryze of load current components is used as a basis for the construction of a family of shunt active power filters. The distinctive property of these filters is maintaining non-deformed source current in every one individually considered period T.

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Experimental Investigations of the Upqc Arrangement

By Isabelle Heriakian / Published on Tue, 2006-05-09 00:00

This paper presents the fundamental properties and dependences describing the UPQC (Unified Power Quality Conditioner) arrangements. The UPQC devices simultaneously permit to fulfill the following functions: voltage and current harmonics compensation, network voltage and load current symmetrization as well as network voltage stabilization and power flow control. The selected results of the experimental investigations conducted on the small power laboratory model have been described.

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Grid Voltages Sensorless Control of the PWM Rectifier with Active Filtering

By Isabelle Heriakian / Published on Mon, 2006-05-08 00:00

The paper presents structure and experimental results of the control system of the PWM rectifier with active filtering function. Proposed control system was designed for maximum filtering performance in steady state. This task is realized by predictive algorithms applied for both control as well as calculation of grid currents. Accuracy of these algorithms strongly depends on precise information about future samples of equivalent electromotive force of the grid, which is in general distorted and unbalanced. For this purpose, a novel estimator and predictor is proposed.

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Power Electronics Harmonic Analysis Based on the Linear Time Periodic Modeling

By Isabelle Heriakian / Published on Sun, 2006-05-07 00:00

This paper presents an analytical frequency-domain method for harmonics modeling and evaluation in power electronic systems. The considered system is described by a set of differential equations, which are converted in the frequency domain and presented in a matrix form. Indeed, currents and voltages are described in terms of Fourier series and arranged in a vector form. The passive elements and the switching functions are then represented by harmonic transfer matrices.

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