An Integrated Permanent-Magnet-Synchronous Generator-Rectifier Architecture for Limited-Speed-Range Applications

Phuc Thanh Huynh, Patrick John Wang, Arijit Banerjee

Research output: Contribution to journalArticlepeer-review

Abstract

Conventional high-power ac - dc conversion architectures rely heavily on active rectifiers, which consist of fully controlled power-electronic switches. These make the system bulky, lossy, and less reliable. This article presents an alternative approach - integrating a multiport permanent-magnet synchronous generator (PMSG) with series-stacked power converters. An active rectifier processes only a fraction of the total converted power while regulating the dc bus. The remaining power is processed by diode bridges, which allows a substantial increase in overall efficiency, power density, and reliability. Theoretical analysis shows that for wind-power generation applications, the active rectifier processes a maximum of 39% of the rated power while the generator operates in a speed range similar to the conventional doubly fed induction machine. The conversion loss is reduced by 47%. Results from a laboratory-scale experimental setup corroborate the proposed architecture. This approach potentially increases integration of medium-voltage dc distribution to the megawatt-class mechanical-to-electrical energy conversion systems to achieve higher efficiency, higher power density, and lower cost compared to the conventional solutions based on a single-port PMSG with a full-power-rated converter.

Original languageEnglish (US)
Article number8862851
Pages (from-to)4767-4779
Number of pages13
JournalIEEE Transactions on Power Electronics
Volume35
Issue number5
DOIs
StatePublished - May 2020

Keywords

  • AC-DC power conversion
  • dc power systems
  • power conversion
  • rectifiers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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