Switching Loss Reduction in Dual-Inverter Topologies Using a Modified Generalized Discontinuous PWM Strategy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00386105" target="_blank" >RIV/68407700:21230/25:00386105 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/IECON58223.2025.11221563" target="_blank" >https://doi.org/10.1109/IECON58223.2025.11221563</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/IECON58223.2025.11221563" target="_blank" >10.1109/IECON58223.2025.11221563</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Switching Loss Reduction in Dual-Inverter Topologies Using a Modified Generalized Discontinuous PWM Strategy

Popis výsledku v původním jazyce

The Dual-Inverter (DI) topology, composed of two two-level Voltage Source Inverters (VSIs), offers a promising alternative to multilevel inverters. It enables multilevel output capability, efficient DC-link voltage utilization, and inherent fault tolerance. However, it involves twice as many switching events compared to a conventional two-level VSI, resulting in higher power losses. Existing modulation strategies either achieve moderate loss reduction with simple implementation or offer greater efficiency at the cost of increased control complexity. This paper proposes a novel modulation strategy, termed SixStep+GDPWM, that combines simple implementation with effective switching loss reduction. The method operates one inverter in a pseudo six-step mode to minimize switching events, while the second inverter is continuously modulated using a clamped waveform. The clamped interval can be phase-shifted relative to the output current, similar to the Generalized Discontinuous PWM (GDPWM) approach used in classical two-level VSIs. The proposed strategy is verified through simulations, demonstrating reduced switching losses across a wide range of operating points while preserving waveform quality and implementation simplicity.

Název v anglickém jazyce

Switching Loss Reduction in Dual-Inverter Topologies Using a Modified Generalized Discontinuous PWM Strategy

Popis výsledku anglicky

The Dual-Inverter (DI) topology, composed of two two-level Voltage Source Inverters (VSIs), offers a promising alternative to multilevel inverters. It enables multilevel output capability, efficient DC-link voltage utilization, and inherent fault tolerance. However, it involves twice as many switching events compared to a conventional two-level VSI, resulting in higher power losses. Existing modulation strategies either achieve moderate loss reduction with simple implementation or offer greater efficiency at the cost of increased control complexity. This paper proposes a novel modulation strategy, termed SixStep+GDPWM, that combines simple implementation with effective switching loss reduction. The method operates one inverter in a pseudo six-step mode to minimize switching events, while the second inverter is continuously modulated using a clamped waveform. The clamped interval can be phase-shifted relative to the output current, similar to the Generalized Discontinuous PWM (GDPWM) approach used in classical two-level VSIs. The proposed strategy is verified through simulations, demonstrating reduced switching losses across a wide range of operating points while preserving waveform quality and implementation simplicity.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

IECON 2025 – 51st Annual Conference of the IEEE Industrial Electronics Society

ISBN

979-8-3315-9681-1

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

IEEE Industrial Electronic Society

Místo vydání

Vienna

Místo konání akce

Madrid

Datum konání akce

14. 10. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001691804100550