Digital Control Strategy for Single-phase Voltage-Doubler Boost Rectifiers

In this paper, a digital controller design procedure is presented for single-phase voltage-doubler boost rectifiers (VDBR). The model derivation of the single-phase VDBR is performed in the s-domain. After that the simplified equivalent z-domain models are derived. These z-domain models are utilized to design the input current and the output dc-link voltage controllers. For the controller design in the z-domain, the traditional K-factor method is modified by considering the nature of the digital controller. The frequency pre-warping and anti-windup techniques are adapted for the controller design. By using the proposed method, the phase margin and the control bandwidth are accurately achieved as required by controller designers in a practical frequency range. The proposed method is applied to a 2.5 kVA single-phase VDBR for Uninterruptible Power Supply (UPS) applications. From the simulation and the experimental results, the effectiveness of the proposed design method has been verified.

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Cite this article

[IEEE Style]

Y. Cho, H. Mok, J. Ji, J. Lai, "Digital Control Strategy for Single-phase Voltage-Doubler Boost Rectifiers," Journal of Power Electronics, vol. 12, no. 4, pp. 623-631, 2012. DOI: 10.6113/JPE.2012.12.4.623.

[ACM Style]

Younghoon Cho, Hyungsoo Mok, Jun-Keun Ji, and Jih-Sheng Lai. 2012. Digital Control Strategy for Single-phase Voltage-Doubler Boost Rectifiers. Journal of Power Electronics, 12, 4, (2012), 623-631. DOI: 10.6113/JPE.2012.12.4.623.