Title :
Power supplying for five-level inverter using multi-output chopper
Author :
Matsui, Keiju ; Yamamoto, Isamu ; Mori, Hideki
Author_Institution :
Dept. of Electr. Eng., Chubu Univ., Aichi, Japan
Abstract :
In the fields such as various electric power compensators and ac motor drives, large capacity and high-performance converters are placed into practical applications. For these converters, since the upper limit of the switching frequency is low and capacity of device is insufficient, method of connecting the device in series and parallel would be effective. From such reasons, for improving the harmonic characteristics, various multi-level inverters have been reported, in which it is necessary to provide some dc power supplies connected in series that is disadvantage for this inverter. We propose a simple dc-dc converter for adjusting the power supply voltages of this inverter. By means of this dc-dc converter circuit, the voltages of four dc power supplies of five-level inverter can be suitably controlled towards the desired value. The circuit characteristics are discussed by theoretical and simulated procedures. The theoretical results and the simulated ones are in agreement with each other.
Keywords :
DC-DC power convertors; choppers (circuits); invertors; motor drives; power supply circuits; static VAr compensators; switching convertors; ac motor drives; dc power supplies; dc-dc converter circuit; electric power compensators; five-level inverter; multi-level inverters; multioutput chopper; power supply voltages; switching frequency; AC motors; Choppers; Circuit simulation; DC-DC power converters; Inverters; Joining processes; Power supplies; Power system harmonics; Switching converters; Switching frequency;
Conference_Titel :
Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE
Print_ISBN :
0-7803-8730-9
DOI :
10.1109/IECON.2004.1431856