Optimum design of RC snubbers for switching regulators
Abstract
The optimum design of an RC snubber to suppress the surge voltage across the transistor in switching regulator with a two-winding reactor is presented. Analyzing the surge voltage by means of high-frequency equivalent circuits, we obtain the third-order characteristic equation. This third-order equation is first analyzed by the aid of the root locus method. As a result, the region where the surge voltage can be suppressed is described in the RC plane. Then considering the snubber loss, the optimum resistance and capacitance can be obtained. Second, the precise design procedure of RC snubbers is discussed by normalization and numerical calculations. This procedure is summarized in easy-to-use nomographs.
- Publication:
-
IEEE Transactions on Aerospace Electronic Systems
- Pub Date:
- March 1979
- DOI:
- 10.1109/TAES.1979.308707
- Bibcode:
- 1979ITAES..15..209H
- Keywords:
-
- Equivalent Circuits;
- Network Synthesis;
- Rc Circuits;
- Switching Circuits;
- Voltage Regulators;
- Design Analysis;
- Eigenvalues;
- Eigenvectors;
- Loci;
- Optimization;
- Roots Of Equations;
- Transistor Circuits;
- Electronics and Electrical Engineering