Hold-Up Time Extension Method for LLC Resonant Converter by Detecting Operation Region
| Autor: | Ronald A. L. Rorrer, Yeonho Jeong, Gun-Woo Moon, Moo-Hyun Park, Dongmin Choi |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
business.industry Voltage control 020208 electrical & electronic engineering Electrical engineering 02 engineering and technology High power density law.invention Capacitor law Margin (machine learning) 0202 electrical engineering electronic engineering information engineering Time extension Point (geometry) Electrical and Electronic Engineering Resonant converter business Voltage |
| Zdroj: | IEEE Transactions on Power Electronics. 35:9949-9952 |
| ISSN: | 1941-0107 0885-8993 |
| DOI: | 10.1109/tpel.2020.2976818 |
| Popis: | An LLC resonant converter is widely used due to the low-voltage stress and zero-voltage-switching (ZVS) capability. The LLC resonant converter should operate in the inductive region due to the ZVS operation. For the stable ZVS operation, a sufficient margin of the maximum operation gain should be guaranteed because the theoretical peak voltage gain analysis is not well-matched with the experimental peak gain. Therefore, it is hard to use the peak gain of the LLC resonant converter. As a result, to satisfy enough hold-up time, there are many side-effects such as a large link capacitor and an unoptimized design for high efficiency. This letter proposes a new hold-up time extension method for the LLC resonant converter, which can use the peak gain without margin by detecting the accurate peak gain point. By using the proposed method, the hold-up time can be extended, and the link capacitor can be reduced for high power density. The feasibility of the proposed structure is confirmed with a 500 W prototype. |
| Databáze: | OpenAIRE |
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