The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive

Huai Wang, Pooya Davari, Dinesh Kumar, Firuz Zare, Frede Blaabjerg

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

8 Citations (Scopus)

Abstract

DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this digest investigates the impact of grid voltage amplitude and phase unbalances on the lifetime of DC-link capacitors used in a standard three-phase motor drive. The theoretical stress models and experimental measurements of the capacitor voltages and ripple currents are presented. The relationship between the DC-link capacitor lifetime and the level of unbalances and loads are discussed based on a 7.5 kW motor drive system. The results serve as a guideline to size the DC-link capacitors to be robust enough at the presence of grid unbalance conditions.
Original languageEnglish
Title of host publicationProceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages6
PublisherIEEE Press
Publication dateOct 2017
Pages4345-4350
ISBN (Electronic)978-1-5090-2998-3
DOIs
Publication statusPublished - Oct 2017
Event2017 IEEE Energy Conversion Congress and Exposition (ECCE) - Cincinnati, Ohio, United States
Duration: 1 Oct 20175 Oct 2017

Conference

Conference2017 IEEE Energy Conversion Congress and Exposition (ECCE)
CountryUnited States
CityCincinnati, Ohio
Period01/10/201705/10/2017

Fingerprint

Capacitors
Electric potential
Thermal stress
Costs

Keywords

  • Motor drive
  • Capacitor
  • Reliability
  • Unbalance

Cite this

Wang, H., Davari, P., Kumar, D., Zare, F., & Blaabjerg, F. (2017). The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive. In Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE) (pp. 4345-4350). IEEE Press. https://doi.org/10.1109/ECCE.2017.8096748
Wang, Huai ; Davari, Pooya ; Kumar, Dinesh ; Zare, Firuz ; Blaabjerg, Frede. / The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive. Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Press, 2017. pp. 4345-4350
@inproceedings{e1eab611c0a14e08bad28b088ddbce17,
title = "The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive",
abstract = "DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this digest investigates the impact of grid voltage amplitude and phase unbalances on the lifetime of DC-link capacitors used in a standard three-phase motor drive. The theoretical stress models and experimental measurements of the capacitor voltages and ripple currents are presented. The relationship between the DC-link capacitor lifetime and the level of unbalances and loads are discussed based on a 7.5 kW motor drive system. The results serve as a guideline to size the DC-link capacitors to be robust enough at the presence of grid unbalance conditions.",
keywords = "Motor drive, Capacitor, Reliability, Unbalance",
author = "Huai Wang and Pooya Davari and Dinesh Kumar and Firuz Zare and Frede Blaabjerg",
year = "2017",
month = "10",
doi = "10.1109/ECCE.2017.8096748",
language = "English",
pages = "4345--4350",
booktitle = "Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE)",
publisher = "IEEE Press",

}

Wang, H, Davari, P, Kumar, D, Zare, F & Blaabjerg, F 2017, The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive. in Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Press, pp. 4345-4350, 2017 IEEE Energy Conversion Congress and Exposition (ECCE), Cincinnati, Ohio, United States, 01/10/2017. https://doi.org/10.1109/ECCE.2017.8096748

The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive. / Wang, Huai; Davari, Pooya; Kumar, Dinesh; Zare, Firuz; Blaabjerg, Frede.

Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Press, 2017. p. 4345-4350.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

TY - GEN

T1 - The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive

AU - Wang, Huai

AU - Davari, Pooya

AU - Kumar, Dinesh

AU - Zare, Firuz

AU - Blaabjerg, Frede

PY - 2017/10

Y1 - 2017/10

N2 - DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this digest investigates the impact of grid voltage amplitude and phase unbalances on the lifetime of DC-link capacitors used in a standard three-phase motor drive. The theoretical stress models and experimental measurements of the capacitor voltages and ripple currents are presented. The relationship between the DC-link capacitor lifetime and the level of unbalances and loads are discussed based on a 7.5 kW motor drive system. The results serve as a guideline to size the DC-link capacitors to be robust enough at the presence of grid unbalance conditions.

AB - DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this digest investigates the impact of grid voltage amplitude and phase unbalances on the lifetime of DC-link capacitors used in a standard three-phase motor drive. The theoretical stress models and experimental measurements of the capacitor voltages and ripple currents are presented. The relationship between the DC-link capacitor lifetime and the level of unbalances and loads are discussed based on a 7.5 kW motor drive system. The results serve as a guideline to size the DC-link capacitors to be robust enough at the presence of grid unbalance conditions.

KW - Motor drive

KW - Capacitor

KW - Reliability

KW - Unbalance

U2 - 10.1109/ECCE.2017.8096748

DO - 10.1109/ECCE.2017.8096748

M3 - Article in proceeding

SP - 4345

EP - 4350

BT - Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE)

PB - IEEE Press

ER -

Wang H, Davari P, Kumar D, Zare F, Blaabjerg F. The Impact of Grid Unbalances on the Reliability of DC-link Capacitors in a Motor Drive. In Proceedings of 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Press. 2017. p. 4345-4350 https://doi.org/10.1109/ECCE.2017.8096748