Authors: B.Yu. Vasiliev, T.H. Nguyen

Title of the article: Analysis of the system of pulse width modulation with functional change of switching frequency in electric drives of transport with battery source

Year: 2024, Issue: 3, Pages: 3-12

Branch of knowledge: 2.4.2. Electrotechnical complexes and systems (engineering)

Index UDK: 62-838

DOI: 10.26730/1816-4528-2024-3-3-12

Abstract: The study focuses on the analysis of a pulse-width modulation (PWM) system with functional frequency variation and its impact on the battery, as well as the quality of the electric drive system. Pulse-width modulation is an important control method in electronic devices such as voltage inverters. Currently, PWM with a fixed switching frequency is predominantly used. However, its application entails several limitations, among which are the amplitudes of harmonics at frequencies that are multiples of the switching frequency, potentially leading to resonant phenomena and negatively affecting the system's performance. One of the alternative PWM methods, actively researched and developed recently, uses functional frequency variation. The main objective of this study is to identify the advantages and disadvantages of varying the switching frequency, regardless of the operating conditions of the system. The research includes theoretical analysis and computer modeling of the proposed system using Matlab/Simulink to study the impact of functional frequency variation on a system with a three-level neutral point clamped (NPC) inverter powered by a DC source. The research results show that a PWM system with functional frequency variation significantly improves the energy efficiency of the electric drive, markedly reduces the amplitudes of higher harmonics in the high-frequency range, and thereby reduces the requirements for filters in the system. These findings can be applied to electric drives in transportation, energy, and other fields. The study makes a significant contribution to the development of modern motor control technologies and their efficient use

Key words: energy efficiency harmonic distortion electromagnetic interference three-level NPC inverter Matlab/Simulink

Receiving date: 09.01.2024

Approval date: 15.04.2024

Publication date: 12.09.2024

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