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The three-phase multilevel inverter output voltage waveforms are compared for the recently proposed simple voltage source multilevel inverter space vector PWM technique, which uses the natural nonsymmetric three-segment vectors switching sequence, and for the traditionally applied in industry multicarrier sinusoidal PWM, namely the phase opposition disposition (POD) PWM. The two variants of the POD...
The paper describes some details of the voltage source multilevel inverter space vector PWM algorithm developed on the base of one of the more general algorithms for oblique-angled coordinates of two delta voltages. The instantaneous output voltage waveform simulation has been carried out, and voltage THD and harmonics integral factors dependences on the amplitude modulation index are presented.
The analytical expressions for trapezoidal and triangular signals arbitrary order q integral factors of harmonics are obtained by using the infinite series harmonic synthesis formulae. Since the only first order coefficient of the differential factors of harmonics can be calculated this way for these signals, the before offered LabVIEW virtual instrument is modified for the up to third order integral...
The numerical parametric synthesis procedure of orthogonal voltages multipulse rectifiers with two-multiple resultant pulse multiplicity, which are consist of the series-parallel connected by output elementary single-phase bridge cells, is offered. The design ratios of feeding EMFs amplitudes has reached by the choosing of the corresponding turns numbers of secondary windings and transformation ratios...
Some issues related to features of construction of the laboratory breadboard of the multilevel VSI, based on the switches-capacitors cells, are considered. In particular, a power supply circuit of switches drivers and a principle of implementation of PLD-based through currents protection are described. The breadboard can be used both in educational, and in the research and development purposes, and...
The method of structural synthesis for multilevel bidirectional converters connecting DC and (or) AC voltage networks without the standard network transformer is offered. Such the converters are based on the concept of the controllable periodic seriesparallel switching of capacitors and by means of transistors allow connecting capacitors either in series to a high-voltage network, or in parallel to...
The method of structural synthesis for multilevel bidirectional converters connecting DC and (or) AC voltage networks without the standard network transformer is offered. Such the converters are based on the concept of the controllable periodic series-parallel switching of capacitors and by means of transistors allow connecting capacitors either in series to a high-voltage network, or in parallel...
Among the recent proposed circuits of the transformerless boost multilevel voltage source inverters based on the concept of the “Marx converter”, three-phase transformerless multilevel inverter with one DC voltage source is presented.
Up-to-date education shall prepare students for work in industry in an optimal and efficient way. Through the project described students are taught basics of renewable energy problems, details of electric vehicles and their power supply and power train, several types of high-efficiency power conversion methods, system design and circuit layout, all with practical realization and actual test. Going...
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