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DC-link Capacitor Reduction in Low Voltage and High Power Integrated Modular Motor Drives

  • The development of 48V high power (>15 kW) automotive propulsion drives demands close integration of the power electronics and the electrical machine. Due to the large operating currents distributed multi-phase topologies are needed and physically separating the power converter from the e-machine would involve heavy cabling and costly connections. The volume and cost of the filter capacitor represents a major challenge in closely integrated high power integrated modular motor drives and techniques are needed to minimize this. The DC-link capacitor requires a large ripple current handling capability and cost, size and reliability limitations result in suitable candidate technologies being those with low volumetric energy densities. Use of interleaved multi three-phase machines are attractive due to the associated capacitor ripple current reduction. Discontinuous modulation schemes may also be employed as a technique for reducing the current ripple. In this paper techniques for capacitor ripple reduction are assessed through simulation and compared.

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Metadaten
Author:Andrew Hopkins, Bernhard Hopfensperger, Phil Mellor
DOI:https://doi.org/10.1109/ECCE.2019.8913213
Parent Title (English):2019 IEEE Energy Conversion Congress and Exposition (ECCE), 29 Sept.-3 Oct. 2019, Baltimore, MD, USA
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2019
Release Date:2022/02/15
Tag:Capacitors; DC-link capacitor; Interleaving; Inverters; Low voltage; Motor drives; Pulse width modulation; Windings; carrier phase shift; dual 3-phase inverter; integrated modular motor drive; ripple current reduction; winding displacement
First Page:3208
Last Page:3214
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Labor Elektrische Maschinen und Antriebstechnik
Begutachtungsstatus:peer-reviewed
research focus:Energie und Mobilität
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG