Abstract
Due to high effective frequency and reduced voltage stress on the switching devices, the three level flying capacitor (3LFC) buck converter has potential to provide better efficiency and higher power density as compared to the traditional buck converter. However, the control implementation is challenging as a result of flying capacitor instability issue. In this paper, the digital hybrid current mode (HCM) control method which combines the average and peak current mode control techniques is modified and implemented to 3LFC buck converter. Flying capacitor voltage balancing is achieved by adjusting the slope compensation of the two switching pairs asymmetrically. The proposed asymmetric slope compensation technique for digital HCM control method is verified in simulations and experimentally with an ARM-based mixed-signal microcontroller on a 40 V input 13 V/6 A output prototype.
Original language | English |
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Title of host publication | Proceedings 2019 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2019 and 2019 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2019 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 377-382 |
Number of pages | 6 |
ISBN (Electronic) | 9781538676875 |
DOIs | |
Publication status | Published - Aug 2019 |
Event | 2019 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2019 and 2019 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2019 - Istanbul, Turkey Duration: 27 Aug 2019 → 29 Aug 2019 |
Publication series
Name | Proceedings 2019 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2019 and 2019 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2019 |
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Conference
Conference | 2019 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2019 and 2019 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2019 |
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Country/Territory | Turkey |
City | Istanbul |
Period | 27/08/19 → 29/08/19 |
Bibliographical note
Publisher Copyright:© 2019 IEEE.
Keywords
- digital control
- Digital hybrid current mode control
- three-level flying capacitor converter