Detection of Voltage Asymmetry Based on DC Link Ripple and Analysis of Its Impact on Diagnostic Processes in Complex Electric Drives

Stanisław Oliszewski; Mateusz Dybkowski

doi:10.2478/pead-2026-0012

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Detection of Voltage Asymmetry Based on DC Link Ripple and Analysis of Its Impact on Diagnostic Processes in Complex Electric Drives

Power Electronics and Drives

Volume 11 (2026): Issue 1 (January 2026)

By: Stanisław Oliszewski and Mateusz Dybkowski

Open Access

|May 2026

Abstract

Voltage imbalance can adversely impact electric motors and other equipment interfaced with a three-phase grid. This phenomenon is prevalent in both industrial power systems and various hybrid vehicle architectures. Faults within the voltage generation system may lead to distortions in the direct current link (DC-link) voltage, thereby compromising the efficacy of fault detection and compensation algorithms in electric drives. Consequently, power supply conditions must be accounted for when developing comprehensive diagnostic frameworks for alternating current (AC) machines. As the voltage asymmetry signatures manifest as specific ripples in the DC-link voltage of systems with an uncontrolled rectifier, detection can be achieved using a single sensor instead of the conventional three-sensor approach. This methodology was proposed and validated through both numerical simulations and experimental testing. Furthermore, the study investigated how variations in DC-link capacitance influence the resulting ripple-based asymmetry factor.

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Articles in this issue

DOI: https://doi.org/10.2478/pead-2026-0012 | Journal eISSN: 2543-4292 | Journal ISSN: 2451-0262

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Language: English

Page range: 188 - 201

Submitted on: Jan 12, 2026

Accepted on: Apr 9, 2026

Published on: May 14, 2026

Published by: Wroclaw University of Science and Technology

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Keywords:

permanent magnet synchronous generator,

Related subjects:

Artificial intelligence,

Engineering,

Electrical engineering,

Electronics

© 2026 Stanisław Oliszewski, Mateusz Dybkowski, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 11 (2026): Issue 1 (January 2026)