Title :
Parallel connections of pulsewidth modulated NPC converters using current sharing reactors
Author :
Matsui, Keiju ; Ueda, Fukashi ; Tsuboi, Kazuo ; Iwata, Koji ; Kobayashi, Tadashi
Author_Institution :
Dept. of Electr. Eng., Chubu Univ., Kasugai, Japan
Abstract :
A technique of parallel connection of power devices by using current sharing reactors for NPC-PWM inverters is reported in this paper, in which a certain modulation technique is discussed. This proposed modulation technique can not only increase current capacity and the output voltage level but also decrease the output harmonic contents. The output voltage waveforms of the proposed inverter have certain voltage levels during their half cycles, thus it is anticipated that it will be difficult to analyze the output waveforms. For such waveforms, a frequency analysis approach is described, whose results are verified by experiments
Keywords :
PWM invertors; power system harmonics; reactors (electric); current capacity; current sharing reactors; frequency analysis approach; half cycles; neutral point clamped inverters; output harmonic contents decrease; output voltage level increase; output voltage waveforms; parallel connection; pulsewidth modulated NPC converters; AC motors; Circuits; Diodes; Frequency; Inductors; Pulse inverters; Pulse modulation; Pulse width modulation inverters; Switches; Voltage;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-2775-6
DOI :
10.1109/IECON.1996.570731
