Title :
A soft switched direct frequency changer
Author :
Villaça, Marco V M ; Perin, Amaldo J.
Author_Institution :
Dept. of Electr. Eng., Federal Univ. of Santa Caterina, Florianopolis, Brazil
Abstract :
Development in power semiconductors and commutation techniques has brought back the interest in direct frequency changers. A soft switched three-phase to single-phase direct frequency changer is introduced adopting the bidirectional ZVS cell proposed by the authors (see IEEE APEC, 1995). Hence, the proposed converter does not need dead time between gate signals, presents natural protection against overcurrent, uses a simple gate signal drive circuitry and the commutation losses are reduced with no increase of the conduction losses. All types of AC modulation can be used and the bidirectional switches can operate in high frequency of commutation. A prototype operating at a high commutation frequency using IGBT is assembled and the results obtained are discussed. Analysis and design are also presented
Keywords :
commutation; frequency convertors; insulated gate bipolar transistors; losses; overcurrent protection; power semiconductor switches; switching circuits; AC modulation; IGBT; bidirectional ZVS cell; commutation losses reduction; commutation techniques; gate signal drive circuitry; natural overcurrent protection; power semiconductors; soft switched direct frequency changer; three-phase to single-phase direct frequency changer; zero voltage switching; Circuits; Frequency; Insulated gate bipolar transistors; Matrix converters; Power semiconductor switches; Protection; Resonance; Switching converters; Thyristors; Zero voltage switching;
Conference_Titel :
Industry Applications Conference, 1995. Thirtieth IAS Annual Meeting, IAS '95., Conference Record of the 1995 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-3008-0
DOI :
10.1109/IAS.1995.530597
