Digital State Feedback Control for a Single/Parallel Module Buck Converter Using the Pole Placement Technique

In this paper, a simple digital control scheme for the single/parallel module buck converters is proposed using a digital state feedback control method. The discrete state feedback controller structure for the robust tracking control is derived by using the error state. The proposed control system can precisely achieve the interleaved current sharing and the output regulation, and can achieve the systematical controller design for a given converter specification using the pole placement technique. For a design example, the single module buck converter is simulated using the MATLAB Simulink software and two 100W parallel module buck converters with a TMS320F2812 DSP is implemented.

[1]  김정훈,et al.  다상 동기 벅 컨버터의 Current Sensing 방법의 비교 연구 , 2007 .

[2]  Eyad H. Abed,et al.  Output regulation of DC-DC switching converters using discrete-time integral control , 1999, Proceedings of the 1999 American Control Conference (Cat. No. 99CH36251).

[3]  H. Jin,et al.  Digital controller design for switchmode power converters , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[4]  D. Packard.  Discrete modeling and analysis of switching regulators , 1976 .

[5]  F.H.F. Leung,et al.  The control of switching DC-DC converters-a general LWR problem , 1991 .