Generalised power flow model for electric machines

Electrical machines are essential parts for renewable energy solutions. For this reason numerous innovations can be stated concerning electrical machine constructions. However, separate dynamical modelling for each machine type is a typical procedure. Some suggestions for generalised modelling based on power flow exist already. This paper upgrades this power flow based modelling approach for electrical machines featuring two stators or two rotors as well as considering different coupling such as electro-magnetic, mechanical integrated or mechanical connected. The objective is a power flow based modelling approach by one model structure exclusively both for electrical standard machines and innovative constructions using different parameter sets only. Four examples, cascaded doubly fed induction generator, single-shaft two-rotor axial flux machine, double-rotor induction and synchronous machine, make this approach clear. In doing so, torque equations have been varied in order to identify matches with selected references. Although this paper uses bond graphs the application of other members of the power flow modelling tool family is possible without any problem.

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