Title :
Three level NPC inverter DC capacitor sizing for a synchronous reluctance machine drive
Author :
Masisi, Lesedi ; Pillay, Pragasen ; Williamson, Sheldon S.
Author_Institution :
Sch. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada
Abstract :
This paper introduces the use of machine saliency as one of the parameters for the sizing of a three level inverter dc-link capacitor. A new nearest three vector (NTV) balancing algorithm is also introduced for the dc-link capacitors. A comparison between a two and three level inverter was conducted whereby the inverter input dc current for the two level inverter registered higher ripples than that of a three level inverter. This promises longer lifespan of the battery on a three level inverter driven SynRM. The SynRM also registered lower d-axis current ripple with a three level inverter which promises lower core losses in the machine. The benefits are even more significant at higher switching frequencies.
Keywords :
capacitor motors; capacitor switching; invertors; magnetic cores; magnetic leakage; reluctance motor drives; switching convertors; NTV balancing algorithm; SynRM drive; battery longer lifespan; d-axis current ripple; higher switching frequency; machine core losses; machine saliency; nearest three vector balancing algorithm; neutral point clamped inverter; synchronous reluctance machine drive; three level NPC inverter DC link capacitor sizing; two level inverter input DC current; Capacitors; Equations; Inverters; Modulation; Reactive power; Torque; Vectors; Three level inverter; core losses; neutral point (NP) voltage ripple; neutral-point-clamped (NPC); saliency ratio; synchronous reluctance machine (SynRM);
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2014 IEEE
Conference_Location :
Pittsburgh, PA
DOI :
10.1109/ECCE.2014.6953796
