Bidirectional current sensorless control for the full-bridge ac/dc converter with considering both inductor resistance and conduction voltages

Hung-Chi Chen, Jhen Yu Liao

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The full-bridge converter is often connected between the ac grid and the dc bus. In the conventional multiloop control, the inner current control loop shapes the ac-side current waveform, and the outer voltage control loop regulates the dc-bus voltage. In this paper, the single-loop bidirectional current sensorless control (BCSC) for the full-bridge ac/dc converter with considering both the inductor resistance and conduction voltage is first proposed. The average-value behavior of the full-bridge ac/dc converter is analyzed and it is simplified to an equivalent single-switch model. Based on this developed equivalent model, BCSC is designed and implemented in the FPGA-based system. There is only voltage control loop in the proposed BCSC (i.e., no current control loop), but BCSC is able to regulate the dc-bus voltage and shape the ac-side current. The provided results in both the rectifier operation and the inverter operation demonstrate the effectiveness of the proposed BCSC.

Original languageEnglish
Article number6522205
Pages (from-to)2071-2082
Number of pages12
JournalIEEE Transactions on Power Electronics
Volume29
Issue number4
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Current sensorless control
  • full-bride converter

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