Sedat Sünter

A true four quadrant matrix converter induction motor drive with servo performance

This paper describes the development of a 2.5 kW high performance vector controlled induction motor servo drive with true four-quadrant capability employing a matrix converter power circuit. The advantages of this system over the conventional rectifier-inverter arrangement are: capability for regeneration into the utility grid, sinusoidal supply currents and minimum passive components. Solutions to the special problems associated with the power circuit and implementation of closed-loop control in the matrix converter drive are given. Comprehensive experimental results demonstrating the performance of the drive system are presented.

Simulation of a Space Vector PWM Controller For a Three-Level Voltage-Fed Inverter Motor Drive

Multilevel voltage-fed inverters with space vector pulse width modulation strategy are gained importance in high power high performance industrial drive applications. This paper proposes a new simplified space vector PWM method for a three-level inverter fed induction motor drive. The three- level inverter has a large number of switching states compared to a two-level inverter. In the proposed scheme, three-level space vector PWM inverter is easily implemented as conventional two-level space vector PWM inverter. Therefore, the proposed method can also be applied to multilevel inverters. In this work, a three-level inverter using space vector modulation strategy has been modeled and simulated. Simulation results are presented for various operation conditions using R-L load and motor load to verify the system model

A Control Technique for Compensating the Effects of Input Voltage Variations on Matrix Converter Modulation Algorithms

Many of the existing algorithms for the matrix converter are formulated in a way that makes their practical incorporation into the closed-loop control scheme difficult. Since these algorithms make assumptions about the input voltage for generating the switching actuation signals, it is not possible to compensate the input voltage variations, which result in incorrect voltage waveforms being applied to the load. In this article, a novel control technique for compensating the effects of the input voltage variations on the matrix converter algorithms is described. Simulation and experimental results demonstrating the performance of the proposed control algorithm are presented.

Slip energy recovery of a rotor-side field oriented controlled wound rotor induction motor fed by matrix converter

Abstract This paper investigates rotor-side field oriented control of a wound-rotor induction motor using the slip energy recovery principle. The proposed drive system uses a matrix converter to transfer the slip energy from the rotor into the mains instead of using ac–dc–ac converter whilst the stator side is fixed to the grid. Operation at both subsynchronous and supersynchronous regions is possible with the proposed drive system. Simulation studies of the proposed doubly fed induction motor drive system verify the good control performance of the system in transient and steady-state conditions.

Feedforward indirect vector control of a matrix converter‐fed induction motor drive

This paper describes the development of closed loop control techniques for matrix converter fed induction motor drives. A prototype drive rated at 2.5kW is used to demonstrate closed loop speed control using vector control technique. Solutions to the special problems associated with the power circuit and implementation of closed loop control in the matrix converter drive are given. Experimental results demonstrating the control techniques are presented for both motoring and generating operations of the matrix converter drive in transient and steady‐state.

The transient and steady state performance of single‐phase induction motor with two capacitors fed by matrix converter

In this study, a single‐phase induction motor with constant v/f, fed by matrix converter, is considered under various frequencies. The modeling of the motor, mechanical load for single phase induction motor and matrix converter have been obtained by using Simulink package program. The performance of the motor under various frequencies is determined. A single‐phase induction motor considered in this work has a running capacitor. The analysis and simulation results are presented.

Effects of input filter on stability of matrix converter using venturini modulation algorithm

In this paper; simulation, design, and implementation of three-phase to three-phase matrix converter using Venturini modulation algorithm have been presented. Furthermore, effects of input filter on stability of matrix converter have been examined. A Simulink model has been developed in such a way that it supports real time work with the use of DSP control card supported by Simulink. Simulation and experimental results for the input and output waveforms of the matrix converter using R-L load are given at various operating conditions. Good agreement was obtained between the simulation results and the results obtained from the prototype.

Application of matrix converter to doubly-fed induction motor for slip energy recovery with improved power quality

This paper reports control of a doubly-fed induction motor with a matrix converter using the slip energy recovery principle. The proposed drive system uses a matrix converter to extract the slip energy from the rotor into the mains instead of using the line commutated cycloconverter or back-to-back PWM converter as a static frequency changer. The system enables operations at both sub-synchronous and super-synchronous speed regions. The obtained simulation results for various operating conditions are presented illustrating the good control performance of the system.

Fuzzy-based Closed-loop Speed Control of Induction Motor Fed from Matrix Converter

Abstract In this study; closed-loop speed control of an induction motor that was achieved by a fuzzy-based slip regulation technique has been performed. As a power source for the motor, a three-phase matrix converter has been used, and the space-vector modulation was adapted for the generation of the switching control signals. Real-time control signals for the matrix converter were generated through MATLAB/Simulink (The MathWorks, Natick, Massachusetts, USA) supported digital signal processor control card. The space-vector modulation technique used in this work is simpler than other control algorithms, both in terms of implementation and the input power factor control. Furthermore, the proposed space-vector modulation technique for the matrix converter reduced “turn-on” number of the switching devices in a switching period, and therefore, fewer switching losses have occurred. Simulation and corresponding experimental results were given for various operating conditions.

Implementation of DSP-based matrix converter using space vector modulation algorithm

In this paper; simulation, design, and implementation of space vector controlled three-phase to three- phase matrix converter have been presented. A Simulink model has been developed in such a way that it supports real time work with the use of DSP control card supported by Simulink. Space vector control algorithm has been preferred to the other control algorithms since it is easy to implement and to control the input power factor with reduced switching loses. Simulation and experimental results of the input and output waveforms of the matrix converter for R-L load are given at various operating conditions. Good agreement was obtained between simulation and laboratory experiments.