Performance Analysis of a Secondary-Side Resonance 1 MHz GaN-based Active-Clamp Flyback DC-DC Converter in CCM

Mohd Izhar Ali; Muhammad Ammirrul Atiqi Mohd Zainuri; Ahmad Asrul Ibrahim; Ahmad Hafiz Mohd Hashim; Mohd Shamsul Ali

doi:10.5755/j02.eie.42618

Authors

Mohd Izhar Ali Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia https://orcid.org/0009-0009-8513-4211
Muhammad Ammirrul Atiqi Mohd Zainuri Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia https://orcid.org/0000-0001-9134-4869
Ahmad Asrul Ibrahim Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia https://orcid.org/0000-0003-4997-3578
Ahmad Hafiz Mohd Hashim Department of Electrical Engineering, German-Malaysian Institute, Jalan Ilmiah, Taman Universiti, Kajang, Selangor, Malaysia https://orcid.org/0000-0002-3653-4085
Mohd Shamsul Ali Faculty of Ocean Engineering Technology, University Malaysia Terengganu, Kuala Terengganu, Terengganu, Malaysia https://orcid.org/0000-0001-7142-7755

DOI:

https://doi.org/10.5755/j02.eie.42618

Keywords:

Active clamp flyback, Continuous current mode, DC-DC power converters, Gallium nitride, Secondary-side resonance

Abstract

Traditional active-clamp flyback (ACF) DC-DC converters operate in discontinuous current mode (DCM) and continuous current mode (CCM). In high-frequency traditional CCM-ACF, zero-voltage switching (ZVS) of main switch is unrealised particularly under light load, necessitating complex control strategies to transition between CCM and DCM depending on the load. In contrast, the secondary-side resonance CCM-ACF topology alters the primary current waveform, affecting the energy stored in the leakage inductance when the active-clamp switch is off, simultaneously reducing the primary rms current, thereby lowering conduction losses and improving overall efficiency. This study presents a comparative performance analysis between high-frequency traditional and secondary-side resonance CCM-ACF. A 60 W 1 MHz gallium nitride (GaN)-based model of both topologies is simulated and analysed using MATLAB Simscape. The results indicate that the secondary-side resonance CCM-ACF achieves ZVS of main switch even under light load with a low output voltage ripple and a better transient response at low output voltage. Finally, a peak efficiency of 93.99 %, which marks a 0.56 % improvement compared to traditional topology, is achieved.

Author Biography

Muhammad Ammirrul Atiqi Mohd Zainuri, Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia

Dr Muhammad Ammirrul Atiqi Mohd Zainuri received the B.Eng. in Electrical and Electronic Engineering from Universiti Putra Malaysia, in 2011, the M.Sc. of electrical power engineering from Universiti Putra Malaysia, in 2013, and In August 2017, he was awarded his Ph.D degree from Department of Electrical and Electronic Engineering, Faculty of Engineering, Universiti Putra Malaysia. He is a member of IEEE, and a registered graduate engineers Malaysia (BEM) in the electrical track. Currently, he is a Senior Lecturer at Department of Electrical, Electronic and System Engineering, Universiti Kebangsaan Malaysia (UKM). He has authored and co-authored number of well recognized journals and conference papers. His research interests are in power electronics, power quality, renewable energy systems and applied artificial intelligent in electrical systems. He is an active research member at UMPEDAC and ALPER (UPM).