| Abstract |
In this paper a system for the development of switching DC/DC converters tests is described. This workbench lets the analysis of converters usually called PWM, 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. Another power stage topologies could be easily added to the system. 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. They will be the best complement for a DC/DC converters theoretical course. |
