Design of Robust Discretized Sliding Mode Controller: Analysis and Application to Buck Converters

2020 ◽  
Vol 67 (12) ◽  
pp. 10672-10681 ◽  
Author(s):  
Yingying Cheng ◽  
Guanghui Wen ◽  
Haibo Du
Keyword(s):  
Sliding Mode ◽  
Sliding Mode Controller ◽  
Buck Converters

scholarly journals Sliding-Mode Control of a Dc/Dc Postfilter for Ripple Reduction and Efficiency Improvement in POL Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
S. I. Serna-Garcés ◽  
R. E. Jiménez ◽  
C. A. Ramos-Paja
Keyword(s):  
Sliding Mode ◽  
Buck Converter ◽  
Sliding Mode Controller ◽  
Buck Converters ◽  
Efficiency Improvement ◽  
Load Current ◽  
Correct Operation ◽  
Current Harmonics ◽  
Ripple Reduction ◽  
Classical Point

This paper proposes an active postfilter based on two Buck converters, connected in parallel, operating in complementary interleaving. In such a configuration the ripple in the load current could be virtually eliminated to improve the power quality in comparison with classical Point-Of-Load (POL) regulators based on a single Buck converter. The postfilter is designed to isolate the load from the main Buck regulator, leading to the proposed three-converter structure named BuckPS. The correct operation of the postfilter is ensured by means of a sliding-mode controller. Finally, the proposed solution significantly reduces the current harmonics injected into the load, and at the same time, it improves the overall electrical efficiency. Such characteristics are demonstrated by means of analytical results and illustrated using numerical results.

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