TY - JOUR
T1 - A Holistic Design Optimization Method for LLC Converters in Light Electric Vehicle Chargers
AU - Lordoglu, Abdulsamed
AU - Gulbahce, Mehmet Onur
AU - Kocabas, Derya Ahmet
AU - Dusmez, Serkan
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2024/6/1
Y1 - 2024/6/1
N2 - The passive components of LLC resonance converters are traditionally designed based on a resonance frequency and switching frequency range considering the required voltage conversion rate while ensuring zero-voltage switching (ZVS) of the primary-side power devices. Afterward, the subelements such as the transformer, power stage, and heat-sink are locally designed. However, this may only lead to locally optimized designs. In this article, a systematic design framework is proposed that attempts to determine the resonance frequency by considering the nonlinear battery load profile, power loss, volume, and cost of all main components. To achieve smaller-sized transformers, a series-connected primary and parallel-connected secondary windings with a multicore configuration is also considered. The proposed algorithm aids designers to optimally size the LLC and provides a step-by-step design methodology. An LLC stage of a light electric vehicle (LEV) battery charger converting 370-430 V to an output voltage range of 36-54 V rated at 3700 W with a peak efficiency of 98.2% has been designed validating the proposed design procedure.
AB - The passive components of LLC resonance converters are traditionally designed based on a resonance frequency and switching frequency range considering the required voltage conversion rate while ensuring zero-voltage switching (ZVS) of the primary-side power devices. Afterward, the subelements such as the transformer, power stage, and heat-sink are locally designed. However, this may only lead to locally optimized designs. In this article, a systematic design framework is proposed that attempts to determine the resonance frequency by considering the nonlinear battery load profile, power loss, volume, and cost of all main components. To achieve smaller-sized transformers, a series-connected primary and parallel-connected secondary windings with a multicore configuration is also considered. The proposed algorithm aids designers to optimally size the LLC and provides a step-by-step design methodology. An LLC stage of a light electric vehicle (LEV) battery charger converting 370-430 V to an output voltage range of 36-54 V rated at 3700 W with a peak efficiency of 98.2% has been designed validating the proposed design procedure.
KW - Battery charger
KW - LLC resonance converter
KW - electric vehicle
KW - magnetics
KW - optimization
KW - power converter
UR - http://www.scopus.com/inward/record.url?scp=85165866294&partnerID=8YFLogxK
U2 - 10.1109/TTE.2023.3298170
DO - 10.1109/TTE.2023.3298170
M3 - Article
AN - SCOPUS:85165866294
SN - 2332-7782
VL - 10
SP - 2445
EP - 2455
JO - IEEE Transactions on Transportation Electrification
JF - IEEE Transactions on Transportation Electrification
IS - 2
ER -
