Extremely High Q-factor Inductor for Loss Reduction in Power Converters for MHz Range

Conference: PCIM Conference 2025 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/06/2025 - 05/08/2025 at Nürnberg, Germany

doi:10.30420/566541056

Proceedings: PCIM Conference 2025

Pages: Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Authors:
Zajc, Franci; Zajc, Anja; Zajc Zdesar, Ivi; Zajc, Franc

Abstract:
In the terms of the green transition of the worldwide spread power conversion an inductor introducing a significant loss reduction in medium-power conversion especially for frequencies up to 1.5 MHz is presented. By achieving an extremely high Q-factor of over 500 despite having a minuscule volume said inductor withstands an outstandingly high ripple current enabling discontinuous mode operation and zero-voltage condition of the power converter and consequently decreases switching losses. Design considerations are discussed and supported by a detailed analysis and magnetic simulations. Finally, theoretical considerations are verified by tests of a prototype SMD inductor built for a space application.