Hysteretic current mode control of a wide output voltage three-level converter

Anderson, O., Barry, B., Hogan, D., & Duffy, M. (2025). Hysteretic Current Mode Control of a Wide Output Voltage Three-Level Converter. IEEE Transactions on Power Electronics, 1-16. https://doi.org/10.1109/TPEL.2024.3516518

Abstract

Multi-level dc-dc converters can offer very high efficiency but have been generally limited to voltage mode control schemes for wide output voltage applications due to difficulties with current mode control near certain duty-cycles. For applications that require current mode control, this paper proposes a hysteretic current mode control scheme which allows cycle-by-cycle control of multi-level converters over a wide duty-cycle range while also allowing operation at the critical duty-cycles found in multi-level converters. This enables high-efficiency solutions for applications that require a wide range of tightly regulated outputs like capacitor & battery charging, direct laser diode driving and motor control. This is achieved using a multi-mode control scheme with ramped current references, a maximum interval timer and reference offsetting for flying capacitor balancing. This control scheme is verified in Simulink modelling and implemented on a prototype three-level buck converter using a combination of a low-cost Field Programmable Gate Array and discrete analog circuitry. Alternative implementations are also described.

Funder

Research Ireland

Publisher

Institute of Electrical and Electronics Engineers

Rights

Attribution 4.0 International

cb

Collections

Electrical and Electronic Engineering (Scholarly Articles)