A Five-Level Cascade Multilever Invertor Three-Phase Motor Drive Using a Single DC Source

Chiasson, J.N. (Univ. Tennessee-Knoxville)

Oak Ridge National Laboratory

关键词: Power Factor;    Modulation;    Inverters;    Capacitors;    Motors;   

DOI  :  10.2172/901193
RP-ID  :  ORNL/TM-2006/572
RP-ID  :  DE-AC05-00OR22725
RP-ID  :  901193

美国|英语

来源: UNT Digital Library

【 摘 要 】

A method is presented showing that a 5-level cascade multilevel inverter for a three-phase permanent magnet synchronous motor drive can be implemented using only a single DC link to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. It is shown that the capacitor voltages can be regulated while achieving an output voltage waveform that is 20% greater than that obtained using the standard 3-leg inverter alone. Finally conditions are given in terms of the power factor and modulation index that determine when the capacitor voltage can regulated.