Abstract
The work is devoted to the study of performance of a multilevel electric energy converter using phase-shifted pulse-width modulation. Equations describing the state of a dynamic system multilevel converter - load are investigated and a mathematical model of the system in Matlab / Simulink environment has been constructed. Variants of implementation of phase-shifted pulse-width modulation systems from the point of view of influence on harmonics of output voltage and magnitude of circulating current in the converter are investigated.
Highlights
The introduction of an adjustable frequency electric drive for low-voltage AC motors over the last decade has proven to be an effective method of improving energy efficiency in industry and utilities [1–3]
There are a significant number of options for constructing circuits of individual cells, which allows you to modify the general characteristics of the converters and the number of output voltage levels
It contains two switches operating in inverse mode and provides two levels of output voltage - zero voltage and a voltage equal to the voltage on the capacitor uc
Summary
The introduction of an adjustable frequency electric drive for low-voltage AC motors over the last decade has proven to be an effective method of improving energy efficiency in industry and utilities [1–3]. The advantage of converters based on current-source inverters is the ability for the electric drive to work in four quadrants without the use of additional hardware or software. Their main parts must have a controlled rectifier, which leads to an increase in reactive power consumption levels. Is the ability to build it using the same type of circuit modules, which provides the ability to replace them quickly in case of failure of semiconductor elements In this case, there are a significant number of options for constructing circuits of individual cells, which allows you to modify the general characteristics of the converters and the number of output voltage levels
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