Switching DC/DC converters educational workbench

A system for the development of switching DC/DC converters tests is described. This workbench permits the analysis of PWM converters, which show trapezoidal waveforms, and quasi-resonant converters (zero voltage switched or ZVS and zero current switched or ZCS) which exhibit quasi-sinusoidal evolutions. The equipment is made in a modular way, different basic blocks can be distinguished: power stages, control circuits, drivers and closed-loop regulators. The chosen power topologies are the simplest ones: buck, boost and flyback. In the last one, the isolation transformer option is included. Specially for the quasi-resonant converters, certain proper static points are established. Around these points, the transition between ZVS and ZCS operation modes is very simple by means of the modification and the connection of several resonant elements. Finally, some experimental practices to carry out with the system are proposed