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Models of non‐smooth switches in electrical systems
Author(s) -
Glocker Christoph
Publication year - 2005
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.316
Subject(s) - discretization , complementarity (molecular biology) , linear complementarity problem , electrical network , electronic circuit , topology (electrical circuits) , differential inclusion , mathematics , computer science , control theory (sociology) , mathematical optimization , engineering , mathematical analysis , physics , electrical engineering , nonlinear system , combinatorics , artificial intelligence , biology , genetics , control (management) , quantum mechanics
Idealized modelling of diodes, relays and switches in the framework of linear complementarity is introduced. Within the charge approach, the classical electromechanical analogy is extended to passively and actively switching components in electrical circuits. The associated branch relations are expressed in terms of set‐valued functions, which allow to formulate the circuit's dynamic behaviour as a differential inclusion. This approach is demonstrated by the example of the DC–DC buck converter. A difference scheme, known in mechanics as time stepping, is applied for numerical approximation of the evolution problem. The discretized inclusions are formulated as a linear complementarity problem in standard form, which implicitly takes care of all switching events by its solution. State reduction, which requires manipulation of the set‐valued branch relations in order to obtain a minimal model, is performed on the example of the buck converter. Copyright © 2005 John Wiley & Sons, Ltd.