Inductor design for high-power applications with broad-spectrumexcitation

摘要

The design of high-power inductors for applications with broadncurrent spectrum excitation is a challenging task. The resonant inductornof a resonant DC-link inverter (RDCLI) is one such example. The inductorncurrent consists of a resonant current component, a DC component, whichnsupplies the active power to the load and a modulation component, whichndepends on the modulation strategy. In addition, the frequency andnamplitude of the dominant current components change with operatingnpoint. Conventional inductor designs for single-frequency excitation donnot perform well in broad-spectrum applications. In order to improventhese designs, the impact of broad current spectrums on winding design,ncore selection, power density, and thermal-handling capability must beninvestigated. In this paper, alternate inductor topologies, which betternaddress the above issues, are proposed and investigated