Influence of the neutral in the thermal performance of a three-phase induction motor under unbalanced power supply using the finite element approach
1998; Emerald Publishing Limited; Volume: 17; Issue: 3 Linguagem: Inglês
10.1108/03321649810203305
ISSN2054-5606
AutoresJ.A. Dias Pinto, A. Paulo Coimbra, Carlos Lemos Antunes, Xosé Manuel López Fernández, Manuel Pérez Donsión,
Tópico(s)Induction Heating and Inverter Technology
ResumoIn this paper the influence of the neutral in the thermal performance of a three‐phase squirrel cage induction motor fed by asymmetrical supply voltages is studied and analysed. A 2D finite element formulation was used to solve the steady‐state heat transfer problem. The eddy currents in the rotor bars were evaluated using a combined 3D finite element approach with analytical expressions. The numerical solutions are compared with measured experimental results obtained in laboratory tests for two load conditions and two unbalanced power supply situations with and without the neutral wire connected.
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