Digital Robust Control for DC-DC Converter with Second-Order Differential Characteristics

Eiji Takegami, Kohji Higuchi, Kazushi Nakano, Tatsuyoshi Kajikawa, Satoshi Tomioka, Kazushi Watanabe
2007 IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society  
Robust DC-DC converter which can covers extensive load changes and also input voltage changes with one controller is needed. The demand to suppressing output voltage changes becomes still severer. We proposed an approximate 2DOF digital controller which realizes the startup response and dynamic load response independently. The controller makes the control bandwidth wider, and at the same time makes a variation of the output voltage small at sudden changes of loads and input voltages. In this
more » ... oltages. In this paper, a new approximate 2DOF digital control system with additional zeros is proposed. Using additinal zeros second-order differential transfer characteristics between equivalent disturbances and an output voltage are realized. Therefore the new controller makes variations of the output voltage smalerl at sudden changes of loads and input voltages. This controller is actually implemented on a DSP and is connected to a DC-DC converter. Experimental studies demonstrate that this type of digital controller can satisfy given severe specifications.
doi:10.1109/iecon.2007.4459922 fatcat:wzik5ppdyvaj3mtgauixoylxqi