Control of three-phase inverter for AC motor drive with small DC-Link capacitor fed by single-phase AC source

Hyun Sam Jung, Seung Jun Chee, Seung Ki Sul, Young Jae Park, Hyun Soo Park, Woo Kyu Kim

Research output: Contribution to journalArticlepeer-review

117 Scopus citations

Abstract

If a small dc-link capacitor is used in the dc link fed by a single-phase ac source, then the dc-link voltage severely fluctuates at twice of the source frequency. To handle this fluctuation, the concept of 'average voltage constraint' is proposed in this study. On the basis of this concept, a flux-weakening scheme, generating the d-axis current reference (i rds*) for the interior permanent-magnet synchronous machine, is devised. The q-axis current reference (ir ds*) is modified for the unity power factor operation in the viewpoint of an ac source without an additional sensor. The proposed scheme has been applied to the inverter-driven 1-kW compressor of an air conditioner. From the experimental results, it has been verified that the compressor operates well at the required operating condition, regardless of the severe fluctuation of dc-link voltage, because of the reduced dc-link capacitance. The frequency spectrum of the ac source current reveals that the harmonics of the source current meet the regulation of IEC 61000-3-2 Class A and that the overall power factor is above 96% without any additional circuit, such as an input filter and a power factor correction circuit.

Original languageEnglish
Article number6651792
Pages (from-to)1074-1081
Number of pages8
JournalIEEE Transactions on Industry Applications
Volume50
Issue number2
DOIs
StatePublished - 2014

Keywords

  • Capacitors
  • electrolytic capacitorless inverter
  • flux-weakening operation
  • harmonics regulation
  • home appliance
  • interior permanent-magnet synchronous motor (IPMSM)
  • inverter
  • power factor
  • variable-speed drives
  • voltage constraint

Fingerprint

Dive into the research topics of 'Control of three-phase inverter for AC motor drive with small DC-Link capacitor fed by single-phase AC source'. Together they form a unique fingerprint.

Cite this