TY - JOUR N2 - The paper discusses problems arising in attempts to accurately represent dynamic processes of an electric arc by means of simple mathematical models. It describes the properties of the universal Pentegov model, employing any shape of static voltagecurrent characteristics of an arc. Next, it presents spectral and integral measuring methods for determining arc parameters in the Mayr, Cassie and Pentegov models of the electric arc with a forced sinusoid current circuit, with the raising static characteristics of hyperbolic-flat and hyperbolic-linear shape. The influence is discussed of the random power supply disturbances on errors of determining the mathematical model parameters. L1 - http://journals.pan.pl/Content/85183/PDF/DOI%2010.1515aee-2016-0007.pdf L2 - http://journals.pan.pl/Content/85183 PY - 2016 IS - No 1 March EP - 103 DO - 10.1515/aee-2016-0007 KW - electric arc KW - Mayr model KW - Cassie model KW - Pentegov model KW - spectral methods KW - integral methods A1 - Sawicki, Antoni A1 - Haltof, Maciej PB - Polish Academy of Sciences VL - vol. 65 DA - 2016 T1 - Spectral and integral methods of determining parameters in selected electric arc models with a forced sinusoid current circuit SP - 87 UR - http://journals.pan.pl/dlibra/publication/edition/85183 T2 - Archives of Electrical Engineering ER -