The paper considers a generalized approach to the development of mathematical models of machine-rectifier system (MRS). These models are designed to solve problems associated with the analysis of transient processes in operational and emergency regimes. The structure of a MRS and the method to form equations give the opportunity to provide the uniformity of the mathematical description of separate MRS components, with the structural detail of each component being practically unlimited. This makes it possible to reduce time for the development of a specific MRS model. The authors present a structural schematic of a generalized machine-rectifier system.