Open AccessHARMONIC DOMAIN MODEL OF AN OPEN-LOOP CONTROLLED PWM CONVERTER
Author(s) -
Malte John,
Axel Mertens
Publication year - 2018
Publication title -
informatyka, automatyka, pomiary w gospodarce i ochronie środowiska
Language(s) - English
Resource type - Journals
eISSN - 2391-6761
pISSN - 2083-0157
DOI - 10.5604/01.3001.0012.0699
Subject(s) - harmonic , control theory (sociology) , pulse width modulation , frequency domain , converters , voltage , voltage source , inverter , physics , topology (electrical circuits) , computer science , mathematics , engineering , mathematical analysis , electrical engineering , acoustics , control (management) , artificial intelligence , quantum mechanics
An harmonic domain model is developed for open-loop controlled voltage source inverters, which provides the steady-state solution for integer multiples of the fundamental frequency. The convolution of the switching function spectrum with the converter currents and voltages is used to describethe coupling of the AC side and the DC side. The modeling is based on a single phase leg and is extended to a single-phase and a three-phase voltage source inverter, which results in a non-linear algebraic equation system. For open-loop control the switching function is independent of the converter currents and voltages and the model is simplified to a linear equation system. This straightforward and fast model is verified by time domain simulations and experimental results. The modeling can be adapted to systems of coupled converters, which is presented for a back-to-back converter system showing the harmonic interaction of the connected subsystems.