Nonlinear resonant pole zero voltage switching in a self oscillating DC to DC converter with magnetic feedback

The self-oscillating inverter with magnetic feedback has proven itself over the years as a simple and robust converter. The fixed-ratio DC-to-DC converter based on this inverter is described, and it is shown that zero voltage switching can be achieved with minimal modifications to the circuit. The topology distinguishes itself from other zero-voltage-switching, clamped voltage topologies by the fact that the inductor in the parallel resonant tank not only is nonlinear, but may include a series resistor. Dimensioning of the soft switching network is restricted by conditions imposed by the feedback circuit and base drive requirements. A method for analysis and experimental results is presented.<
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