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

作者：Cho Younghoon^*; Mok Hyungsoo; Ji Jun Keun; Lai Jih Sheng

来源：Journal of Power Electronics, 2012, 12(4): 623-631.

DOI：10.6113/JPE.2012.12.4.623

• Voltage-Doubler Boost Rectifier
• Power factor correction
• Digital current controller
• z-domain modelling
• zero-order hold
• digital delays

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.

• 出版日期2012-7
• 单位Virginia Tech; 美国弗吉尼亚理工大学(Virginia Tech)