Direct Current Control Method Based On One Cycle Controller for Double-Frequency Buck Converters

Quanming Luo; Shubo Zhi; Weiguo Lu; Luowei Zhou

Direct Current Control Method Based On One Cycle Controller for Double-Frequency Buck Converters

Vol. 12, No. 3, pp. 410-417, May 2012

10.6113/JPE.2012.12.3.410

DF buck

One cycle controller

Small signal model

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Abstract

In this paper, a direct current control method based on a one-cycle controller (DCOCC) for double frequency buck converters (DF buck) is proposed. This control method can make the average current through the high frequency and low frequency inductors of a DF buck converter equal. This is similar to the average current control method. However, the design of the loop compensator is much easier when compared with the average current control. Since the average current though the high frequency and low frequency inductors is equivalent, the current stress of the high frequency switches and the switch losses are minimized. Therefore, the efficiency of the DF buck converter is improved. Firstly, the operation principle of DCOCC is described, then the small signal models of a one cycle controller and a DF buck converter are presented based on the state space average method. Eventually, a system block diagram of the DCOCC controlled DF buck is established and the compensator is designed. Finally, simulation and experiment results are given to verify the correction of the theory analysis.

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Cite this article

[IEEE Style]

Q. Luo, S. Zhi, W. Lu, L. Zhou, "Direct Current Control Method Based On One Cycle Controller for Double-Frequency Buck Converters," Journal of Power Electronics, vol. 12, no. 3, pp. 410-417, 2012. DOI: 10.6113/JPE.2012.12.3.410.

[ACM Style]

Quanming Luo, Shubo Zhi, Weiguo Lu, and Luowei Zhou. 2012. Direct Current Control Method Based On One Cycle Controller for Double-Frequency Buck Converters. Journal of Power Electronics, 12, 3, (2012), 410-417. DOI: 10.6113/JPE.2012.12.3.410.