Bibliographic Details
| Title: |
A Study on Equivalent Series Resistance Estimation Compensation for DC-Link Capacitor Life Diagnosis of Propulsion Drive in Electric Propulsion Ship. |
| Authors: |
Roh, Chan, Jeon, Hyeon-min, Kim, Seong-wan, Kim, Jong-su, Song, Sung-woo, Lee, Na-young, Kang, Seok-cheon |
| Source: |
Processes; Feb2025, Vol. 13 Issue 2, p291, 18p |
| Subject Terms: |
ELECTROLYTIC capacitors, ELECTRIC filters, PROPULSION systems, SHIP propulsion, FAULT diagnosis |
| Abstract: |
This study proposes a novel fault diagnosis algorithm based on Equivalent Series Resistance (ESR) estimation to enhance the accuracy of capacitor life diagnosis techniques for the DC link in marine electric propulsion systems. Accurate ESR estimation is critical for maintaining the reliability and efficiency of DC-Link capacitors, which play a key role in stabilizing voltage, reducing harmonics, and ensuring the smooth operation of electric propulsion systems. By preventing capacitor failures, this algorithm contributes to reducing the risk of catastrophic damage to entire systems. The ESR value is determined by extracting AC voltage and current data within the frequency range of 10 kHz to 30 kHz using a band-pass filter. To improve reliability, the algorithm compensates for input errors based on the modulation index and switching pattern, with error data stored in a lookup table. By addressing limitations in existing ESR estimation techniques, the proposed method reduces estimation errors across the entire range and enhances fault diagnosis accuracy. Experimental results validate the algorithm's improved accuracy, reliability, and stability, demonstrating its effectiveness in preventing damage to power conversion devices. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
