Title :
High efficiency power factor correction using interleaving techniques
Author :
Miwa, Brett A. ; Otten, David M. ; Schlecht, Martin F.
Author_Institution :
Lab. for Electromagn. & Electron. Syst., MIT, Cambridge, MA, USA
Abstract :
A highly efficient 1.5 kW power factor correction converter for computer applications is presented. Eight boost-topology switching cells are interleaved to meet stringent EMI input ripple specifications while operating at a very low switching frequency (25 kHz per cell) to minimize switching losses. The result is a system with very high conversion efficiency (94%-97%, including input bridge, bias supply, and EMI filter losses) over the 93-264 VAC input range. Key implementation details, including discontinuous inductor current operation, a combination of linear and bang-bang control algorithms for fast dynamic load response, and extended (100 ms) power outage ride-through capability, are described
Keywords :
bang-bang control; losses; power convertors; power factor correction; switching circuits; 1.5 kW; 25 kHz; 93 to 264 V; 94 to 97 percent; EMI input ripple specifications; bang-bang control algorithms; boost-topology switching cells; computer applications; converter; discontinuous inductor current operation; fast dynamic load response; interleaving techniques; linear control; power factor correction; power outage ride-through capability; switching losses minimisation; very low switching frequency; Bang-bang control; Bridges; Computer applications; Electromagnetic interference; Filters; Inductors; Interleaved codes; Power factor correction; Switching frequency; Switching loss;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1992. APEC '92. Conference Proceedings 1992., Seventh Annual
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0485-3
DOI :
10.1109/APEC.1992.228361
