| Abstract |
In d .c. converters the snubbers are used to reduce switching losses and/or to assure the operation of the switch within SOAR. While the dissipative snubber reduces transistor losses, the losses in the very snubber are increased. Therefore, the total switching losses have a limited minimum. The nondissipative snubber decreases transistor losses in a similar way, with negligible dissipation in the snubber. However, the minimum switching losses are again limited and these limitations have been derived from the permissible current and voltage stress of the transistor switch and from the converter circuit parameters as output power, input and output voltage and working frequency. A nondissipative snubber design procedure which enables the minimisation of transistor turn-off losses is shown. The measuring results obtained on a realized converter are presented. |
