INDUCTOR DESIGN FOR HIGH-POWER APPLICATIONS WITH BROAD-SPECTRUM EXCITATION

The design of high-power inductors for applications with broad current spectrum excitation is a challenging task, The resonant inductor of a resonant de-link inverter (RDCLI) is one such example, The inductor c urrent consists of a resonant current component, a de component, which supplies the active power to the load and a modulation component, whi ch depends on the modulation strategy, In addition, the frequency and amplitude of the dominant current components change with operating poi nt, Conventional inductor designs for single-frequency excitation do n ot perform well in broad-spectrum applications, In order to improve th ese designs, the impact of broad current spectrums on winding design, core selection, power density, and thermal-handling capability must be investigated, In this paper, alternate inductor topologies, which bet ter address the above issues, are proposed and investigated.