Title :
High frequency ZVS for high power rectifiers
Author :
Miller, M. ; Buffin, A. ; Carlsson, U.
Author_Institution :
Philips Power Syst., Wavre, Belgium
Abstract :
This paper describes a family of rectifiers with power outputs from 1.5 kW to 7 kW, based on high frequency (200 kHz) converters using power MOSFETs. The circuit uses full-bridge converters in the quasi-resonant mode (zero-voltage switching), which results in very low switching losses. Both single-phase and three-phase designs are available. The single-phase 230 V versions are equipped with a power factor controller to comply with IEC 555-2. Two bridges are mounted in series for operation from a three-phase 400 V supply. An innovative construction of the power transformer, protected by a patent, guarantees perfect equilibrium between the two bridges without any additional control circuit. The principle is also extended to transformers mounted in parallel for higher power levels
Keywords :
AC-DC power convertors; bridge circuits; power MOSFET; power factor correction; power transformers; rectifiers; rectifying circuits; resonant power convertors; switching circuits; 1.5 to 7 kW; 200 kHz; 230 V; 400 V; HF; IEC 555-2; ZVS; equilibrium; full-bridge; parallel connection; power MOSFET; power factor control; power rectifiers; power transformer; quasi-resonant mode; series connection; single-phase; switching losses; three-phase; zero-voltage switching; Bridge circuits; Frequency conversion; IEC standards; MOSFETs; Power transformers; Reactive power; Rectifiers; Switching converters; Switching loss; Zero voltage switching;
Conference_Titel :
Telecommunications Energy Conference, INTELEC '93. 15th International
Conference_Location :
Paris
Print_ISBN :
0-7803-1842-0
DOI :
10.1109/INTLEC.1993.388488
