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Bachelor's Thesis
Author of thesis: Kryštof Stránský
Acad. year: 2025/2026
Supervisor: Ing. Michal Pavlík, Ph.D.
Reviewer: prof. Ing. Jaroslav Boušek, CSc.
This Bachelor thesis addresses the issue of parallel connection of~switched-mode power supplies, suitable DC/DC converter topologies, and feedback control structures that enable efficient load sharing among multiple power modules. Parallel operation of switched-mode power supplies is commonly used in modern electronic systems, particularly in applications requiring higher output power, increased reliability, or~power supply redundancy. The thesis focuses on the analysis of individual methods for paralleling switched-mode power supplies and their comparison in terms of control-loop stability, dynamic response, efficiency, and implementation complexity. Special attention is paid to the role of feedback loops and control algorithms, which significantly influence the ability of converters to~achieve uniform current sharing. The main emphasis is placed on two fundamental load-sharing concepts: passive current sharing based on modification of the output voltage characteristic (droop control) and~active current sharing utilizing a control or communication signal between individual modules. The thesis also includes an analysis of typical issues associated with parallel operation, such as circulating currents, output voltage mismatches, and their impact on~control-loop stability. Based on the performed analysis, a suitable structure of a parallel-connected power supply is selected, for which a behavioral signal model is developed. This model enables simulation of the system’s dynamic behavior, verification of current-sharing principles, and evaluation of the influence of feedback control on the stability of the overall power supply system.
switched-mode power supply, parallel operation of power supplies, current sharing, droop control, feedback control, DC/DC converter, behavioral model, space applications
Date of defence
17.06.2026
Result of the defence
Defended (thesis was successfully defended)
Grading
B
Process of defence
Student seznámil státní zkušební komisi s řešením své bakalářské práce a zodpověděl otázky a připomínky oponenta. Dále odpověděl na otázky komise: Termín efektivita znamená účinnost? Student odpověděl, že tím myslel účinnost. AC analýza DC-DC měniče? Jak jste jí dělal, jaký model jste použil? Student odpověděl pomocí součástek, ze kterých udělal schéma. Použito bylo average modelování. Výkonová část a zpětná vazba.
Language of thesis
Czech
Faculty
Fakulta elektrotechniky a komunikačních technologií
Department
Department of Microelectronics
Study programme
Microelectronics and Technology (BPC-MET)
Composition of Committee
prof. Ing. Jaroslav Boušek, CSc. (předseda) prof. Ing. Dalibor Biolek, CSc. (místopředseda) Ing. Vladimír Levek, Ph.D. (člen) Ing. Alexandr Otáhal, Ph.D. (člen) Ing. Roman Prokop, Ph.D. (člen)
Supervisor’s reportIng. Michal Pavlík, Ph.D.
Grade proposed by supervisor: B
Reviewer’s reportprof. Ing. Jaroslav Boušek, CSc.
Grade proposed by reviewer: B
Responsibility: Mgr. et Mgr. Hana Odstrčilová