A novel unified passive lossless turn-on and turn-off snubber is proposed for a single-ended switch, where energy trapped in the snubber inductor and the capacitor is recovered into the DC rail and the load, without any active devices or resistors. The maximum over-shoot voltage on the switch is fixed, peak switch current is low, circuit reset is fast and the operational range of load current is wide, making this circuit suitable for use in high-frequency, power, single-ended GTO thyristor choppers and asymmetrical half-bridges. The recovery circuit may be operated as a soft-clamp. Design equations, simulations and practical results are given.
|Number of pages||23|
|Journal||International Journal of Electronics|
|Publication status||Published - Sept 1996|