Capacitive-loaded push-pull parallel-resonant converter

Average simulation of PWM converters by direct implementation of behavioural relationships

“…To help this evaluation, the subcircuits were designed with extra ports which carry the essential data (Appendix B). An extensive discussion and a practical solution for implementing the automatic toggling was given by Edry (1992). Downloaded by [The University of Manchester Library] at 22:19 03 January 2015…”

High Voltage Resonant Self-Tracking Current-Fed Converter

“…If it were run exactly at resonance, this problem would not be an issue. However, operating the converter at perfect resonance would be very difficult with the configuration of controlled gates presented in [21]. The resonant components have relatively large tolerances, not due to poor design or manufacturing, but from the inherent properties of materials involved -specifically the magnetic material such as ferrite.…”

“…(CL-PPRC) [21]. Shown in Figure 2-4, the converter is a relative to the currentfed push-pull discussed earlier.…”

“…As the frequency approaches the resonant frequency, the switch RMS current will decrease, but the converter will have less margin for control. The suggested ratio of f s to f r is 0.7-0.8 (as simulated) to allow sufficient room for component tolerance as well as headroom for line or load changes [21]. Inherently, this converter will have excessive drain currents since resonant currents flow through the switches.…”

“…gate timing were chosen within the suggested criteria from [21]. Based on the drain waveform, it is clear that ZVS is achieved by this topology.…”