Title :
48/72-step voltage double three-level converters coupled with line-side reactors
Author :
Oguchi, Kuniomi ; Hama, Hideki ; Kubota, Tomotsugu
Author_Institution :
Fac. of Eng., Ibaraki Univ., Hitachi, Japan
fDate :
31 Aug-4 Sep 1998
Abstract :
A novel 48- or 72-step voltage power converter system topology without using bulky input transformers is proposed. The system consists of three line-side interphase reactors, two three-level voltage-source power converters and an additional single-phase converter with a small single-phase transformer. The two main converters operate at the power line frequency and the additional converter operates at a frequency of six times the line frequency. The resultant voltages have a smaller total harmonic distortion of 3.97% for the 48-step operation or 2.59% for the 72-step operation
Keywords :
AC-DC power convertors; harmonic distortion; power conversion harmonics; power transformers; rectifying circuits; 48/72-step voltage double three-level power converters; line-side interphase reactor coupling; power line frequency; rectifier circuits; single-phase converter; single-phase transformer; total harmonic distortion; voltage distortion; Circuits; Frequency conversion; Inductors; Phase transformers; Pulse width modulation; Pulse width modulation converters; Rectifiers; Switching converters; Switching frequency; Voltage;
Conference_Titel :
Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE
Conference_Location :
Aachen
Print_ISBN :
0-7803-4503-7
DOI :
10.1109/IECON.1998.724161
