Advanced digital control of DC-DC converters

Our research is focused on achieving maximum bandwidth in digital controllers for DC-DC converters.

Digital controllers, although having significant advantages such as increased immunity to noise and enviromental changes and offering possibilities of designing advanced, flexible and adaptive controllers, also has inherently lower bandwidth due to sampling and processing delays. Since controller bandwidth is directly related to the converter dynamic performance, our research objective is to regain as much of the lost bandwidth as possible while exploiting the potential benefits of digital controllers.

Embedded system technologies such as Field-Programmable Gate Array (FPGA) are used to implement the digital controllers in order to take advantage of the parallel execution and the flexibility FPGAs offers. 

 

Design and implementation of digital current mode controller for DC-DC converters

By Fazel Taeed

This research PhD project focuses on development of current mode controller for dc-dc converters using the digital data processors. Generally, digital controllers achieve lower bandwidth than classical analog controllers due to the delays created by Analog to Digital Converters (ADC) and calculations. The delays in digital inner current loop are minimized in this research project; therefore the proposed digital current mode control can achieve nearly equal bandwidth as classical analog current mode controllers.
This research project is supported by Interreg 4A- European Regional Development fund for Schleswig-K.E.R.N. and Southern Denmark region (eMOTION).

 

By Karsten Holm Andersen