Title :
A fixed-frequency modified series-resonant converter: analysis, design, and experimental results
Author_Institution :
Dept. of Electr. Eng., Victoria Univ., BC, Canada
fDate :
11/1/1995 12:00:00 AM
Abstract :
It is shown that a fixed-frequency modified (LCL-type) series-resonant converter operates in five different modes with variations in the load current and the supply voltage. The converter is analyzed using the state-space approach for these operating modes. Both the general solutions and the steady-state solutions are obtained. Based on the analysis, design curves are obtained and a simple design procedure is illustrated using a design example. Detailed experimental results obtained from a MOSFET-based 500 W converter are presented to verify the analysis. It is shown that using a proper design, the converter operates only in modes 2 and 3, ensuring a lagging power factor mode of operation for very wide variations in the load and supply voltage
Keywords :
field effect transistor switches; power factor; resonant power convertors; state-space methods; switching circuits; 500 W; LCL-type series-resonant converter; MOSFET-based converter; fixed-frequency modified series-resonant converter; lagging power factor; load current variations; operating modes; state-space approach; steady-state solutions; supply voltage variations; Current supplies; Frequency conversion; RLC circuits; Reactive power; Resonance; Resonant frequency; Switches; Switching converters; Switching frequency; Zero voltage switching;
Journal_Title :
Power Electronics, IEEE Transactions on
