Analysis of Snubber Circuit Parameters Based on an Excitation Controlling Circuit
In an excitation control system of some DC generator, there are accidents sometimes thanks to the snobbery unit. To solve these bothersome, based on an snubber unit of the excitation control circuit, namely a Buck converter topology with rectifier bridge, with the filter capacitance and the exciting winding impedance parameter assured, the preferences of the resistance and capacitance of the snubber circuit is investigated by simulation. The result is that it can limit the switching-on peak current of the switch when the snubber resistance and capacitance’s parameters are increased suitably, and the former one can lose more energy on the snubber resistance, then the latter one can reduce the striking current in the snubber resistance at the switching-on time. Finally, the simulation results are provided to verify that the exact selection of the snubber resistance and capacitance’s parameters can make excitation controlling circuit more stable and reliable.
W. Gao et al., "Analysis of Snubber Circuit Parameters Based on an Excitation Controlling Circuit", Advanced Materials Research, Vols. 383-390, pp. 2269-2275, 2012