Frequency Response Measurement of the Loop Gains of Digitally Controlled Power Converters by Disturbing Digital Circuits

2025 IEEE 7th Global Power, Energy and Communication Conference (GPECOM 2025): Proceedings 2025
Kristiāns Gaspersons, Kaspars Kroičs

To design stable controller of the DC-DC converter or other power electronics converter used method is frequency loop measurement. The methods to measure analog controller-based loops are well known. More and more digital controllers are used and by using traditional methods not all of the loops can be measured. The paper presents a practical approach to measure Bode plots of digital controller, plant and whole loop with traditional measurement device, but supplying disturbance signal into the digital system. Practical results are shown, and instructions given to implement such measurement method into conventional microcontroller. Achieved measurement results fits well with theoretical ones and simulations.

Keywords
Bode plot; DC-DC converter; digital control; fast response; frequency response analysis
DOI
10.1109/GPECOM65896.2025.11061930
Hyperlink
https://ieeexplore.ieee.org/document/11061930

Gaspersons, K., Kroičs, K. Frequency Response Measurement of the Loop Gains of Digitally Controlled Power Converters by Disturbing Digital Circuits. In: 2025 IEEE 7th Global Power, Energy and Communication Conference (GPECOM 2025): Proceedings, Germany, Bochum, 11-13 June, 2025. Piscataway: IEEE, 2025, pp.1-6. ISBN 979-8-3315-1324-5. e-ISBN 979-8-3315-1323-8. ISSN 2832-7667. e-ISSN 2832-7675. Available from: doi:10.1109/GPECOM65896.2025.11061930

Publication language
English (en)