Abstract
Time optimal control (TOC) is a technique to provide fast transient recovery in dc-dc converters. Prior published approaches are incomplete in the formulation of TOC because they ignore voltage-deviation effects on inductor-current and load-current dynamics during a large-signal recovery. An accurate TOC algorithm based on capacitor current is presented. This method achieves minimum transient recovery time for load transients and tracking in a buck converter. The minimum recovery time is preserved even with a transient-detection delay. This control configuration ensures large-signal stability in a sense similar to that of sliding-mode control. The results are demonstrated in an experimental buck converter that uses a digital control algorithm.
Original language | English (US) |
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Article number | 5970122 |
Pages (from-to) | 1444-1454 |
Number of pages | 11 |
Journal | IEEE Transactions on Power Electronics |
Volume | 27 |
Issue number | 3 |
DOIs | |
State | Published - 2012 |
Keywords
- Buck converter
- capacitor current
- characteristic impedance
- hybrid control
- time optimal control (TOC)
ASJC Scopus subject areas
- Electrical and Electronic Engineering