Neural Network Based Pipelined-Parallel Generation of PWM Signals Suitable to Drive Three Single Phase UPS-ENG

Shefa A Dawwd,Basil M Saied

doi:10.33899/rengj.2013.79422

Abstract

A reliable technique has been proposed to generate a real time pulse width modulation (PWM) signals in order to drive three – single phase uninterruptible power supply (UPS). The PWM patterns have been generated using field programmable gate array (FPGA) and based on selective harmonic elimination method. These patterns are used to drive the six of switching power transistors of the voltage source inverter to produce three – single phase UPS. In order to solve the problem of the complexity of the nonlinear transcendental equations, an intermediate steps have been taken, using artificial neural network (ANN). This will overcome the problem of the off line solution and therefore obtaining the required data to solve the obstacle solution from off line to on line. Therefore, the trained ANN is implemented in a parallel hardware by using FPGA. The benefits of using FPGA to perform ANN are promising and the technique becomes very attractive. It allows a real time, simple, fast, reliable and efficient design with low hardware costs. Finally generating selective harmonic elimination pulse width modulation (SHEPWM) patterns as a real time signals are become visible. Keywords: Field programmable gate array, Selective harmonic elimination pulsewave modulation, Neural networks

Highlights

The main element of the voltage source inverter (VSI) is the power switching devices such as IGBT, Bipolar Power transistor, Power MOSFET, GTO, etc
One of the interesting pulse width modulation (PWM) methods is the Selective Harmonic Elimination Pulse Width Modulation (SHEPWM), which has been used to drive different types of voltage source inverter which is the main unit for wide range of power electronic applications
This dead time has been considered for all SHEPWM signals, to drive the six power switching devices, which have been generated by field programmable gate array (FPGA)

Summary

Introduction

The main element of the voltage source inverter (VSI) is the power switching devices such as IGBT, Bipolar Power transistor, Power MOSFET, GTO, etc. One of the interesting PWM methods is the Selective Harmonic Elimination Pulse Width Modulation (SHEPWM), which has been used to drive different types of voltage source inverter which is the main unit for wide range of power electronic applications. This is due to its ability to eliminate wide band of specified harmonic frequency components at relatively low switching frequencies [6]. A modification is performed by introducing dead time, which is required to prevent the two power switching devices on each of the three legs of VSI circuit, to be conducted simultaneously This dead time has been considered for all SHEPWM signals, to drive the six power switching devices, which have been generated by FPGA.

Objectives

Results

Conclusion