New Return Path Inductor Buck-Boost Y-Inverter Motor Drive With Reduced Current Stresses
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Date
2022-09Type
- Journal Article
Abstract
Variable speed drives (VSDs) for electric motors are a foundational component of global electrification, with electric motors consuming 45% of global electricity. Conventional three-phase buck-boost inverter topologies have substantial lowfrequency current stresses in the buck-boost inductor, driving size, losses, and cost in VSD systems. In this letter, we propose a novel circuit topology for phase-modular three-phase buck- boost inverter systems based on the four-switch noninverting buck-boost concept, which we call the return path inductor Y-inverter (RPI-YI). By relocating the buck-boost inductors from the forward current path to the return path, the RPI-YI concept reduces the inductor rms and peak current stresses by up to 90% compared to a conventional topology, resulting in a potential magnetics volume reduction of 80%. The RPI-YI concept, therefore, supports more compact, efficient realizations of modular buck- boost VSD systems. Show more
Publication status
publishedExternal links
Journal / series
IEEE Transactions on Power ElectronicsVolume
Pages / Article No.
Publisher
IEEESubject
Return-path inductor; three-phase buck-boost inverter; wide input and output voltage range; Y-inverterOrganisational unit
03573 - Kolar, Johann W. / Kolar, Johann W.
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