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High‐frequency link‐type dc/ac converter for ups with a new voltage clamper
Author(s) -
Tokunaga Norikazu,
Yamato Ikuo,
Matsuda Yasuo,
Amano Hisao
Publication year - 1993
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391130312
Subject(s) - cycloconverter , commutation , uninterruptible power supply , electrical engineering , reactance , transformer , engineering , inverter , flyback converter , voltage , forward converter , electronic engineering , boost converter
This paper proposes a new type of high‐frequency dc/ac converter developed for flexible, compact and high‐efficiency uninterruptible power supply (UPS) systems. The proposed dc/ac converter consists of a high‐frequency inverter, a high‐frequency transformer and a cycloconverter with a new voltage clamper. This cycloconverter is capable of being operated by both source‐commutation and self‐commutation (commutation by turning off the switching device). Consequently, by choosing between the two commutating methods, based on consideration and the internal voltage drop caused by commutating reactance, a compact and efficient UPS can be realized. The voltage clamper effectively reduces power loss of the conversion system. Fabrication of a 10‐kVA high‐frequency link‐type dc/ac converter is described and its loss reduction effect is demonstrated.