A single-stage zero-voltage zero-current-switched full-bridge DCpower supply with extended load power range
Jain, P.K.; Espinoza, J.R.; Ismail, N.A.
Industrial Electronics, IEEE Transactions on
Volume 46, Issue 2, Apr 1999 Page(s):261 - 270
Digital Object Identifier 10.1109/41.753764
Summary:A single-stage power-factor-corrected pulsewidth modulation power
converter with extended load power range is presented. The topology is
based on a zero-voltage zero-current-switched full-bridge (ZVZCS-FB)
inverter. Steady-state analysis of the topology shows that by operating
the LC load filter in discontinuous mode, the DC-link voltage remains
bounded and independent of the load level. Therefore, the load power
range can be further expanded, including the no-load operating
condition. The analysis also shows that the extension of the load power
range is achieved without any penalty in: (1) the input power factor
(due to the input current waveshaping feature); (2) the power converter
efficiency (due to ZVZCS and the single-stage features); and (3) the
load voltage quality (due to the high bandwidth of the phase control
loop). Simulated and experimental results are included to show the
feasibility of the proposed scheme
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