When two or more electrical machines are electrically and mechanically interconnected, the implementation of a single two-dimensional finite element analysis (2D-FEA) of the whole sys- tem is complex or even impossible. This is mainly due to the fea- ture of commercially available 2D-FEA software to use a domain depth equal for all the electrical machines drawn in the geometrical 2-D model. For any typology of rotating electrical machines, the proposed “ virtual material method ” easily consents to change the actual axial stack length to an arbitrary value, opening the way to describe all the machines in a single geometrical model. In the paper, the complete theory of this original approach is reported and validated on permanent magnet, induction, and field-wound synchronous machines. The cases of study with two and three inter- connected machines are also presented and the results compared with the cosimulation technique of their separated bidimensional models. The perfect agreements observed in the comparisons defi- nitely prove the feasibility of the proposed solution.

Virtual Material Method for Enabling a Single 2d-FEA Simulation of Electrical Machine Sets / Yulong, Pei; Cavagnino, Andrea; Vaschetto, Silvio. - In: IEEE TRANSACTIONS ON ENERGY CONVERSION. - ISSN 0885-8969. - (2018), pp. 1354-1362. [10.1109/TEC.2018.2806567]

Virtual Material Method for Enabling a Single 2d-FEA Simulation of Electrical Machine Sets

Cavagnino, Andrea;Vaschetto, Silvio
2018

Abstract

When two or more electrical machines are electrically and mechanically interconnected, the implementation of a single two-dimensional finite element analysis (2D-FEA) of the whole sys- tem is complex or even impossible. This is mainly due to the fea- ture of commercially available 2D-FEA software to use a domain depth equal for all the electrical machines drawn in the geometrical 2-D model. For any typology of rotating electrical machines, the proposed “ virtual material method ” easily consents to change the actual axial stack length to an arbitrary value, opening the way to describe all the machines in a single geometrical model. In the paper, the complete theory of this original approach is reported and validated on permanent magnet, induction, and field-wound synchronous machines. The cases of study with two and three inter- connected machines are also presented and the results compared with the cosimulation technique of their separated bidimensional models. The perfect agreements observed in the comparisons defi- nitely prove the feasibility of the proposed solution.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2701410
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