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access icon free Saturated VSD model of a six-phase induction machine

© The Institution of Engineering and Technology
Received 26/06/2020, Accepted 22/10/2020, Revised 12/10/2020, Published 04/12/2020

In this study, a saturated model of an asymmetrical six-phase induction machine is presented. The model is based on the vector space decomposition approach, and it includes main and leakage flux saturation, as well as the mutual coupling between orthogonal planes while using the Gamma equivalent circuit approach. The accuracy of the proposed model in unbalanced operating modes that are characteristic for multiphase machines, such as post-fault and power-sharing operation, makes it advantageous compared to existing models. The model is developed assuming that the machine operates in asymmetrical conditions and that, therefore, there is fundamental frequency excitation in both planes. The inter-plane coupling effect is examined using finite element analysis and an experimental procedure for its quantification is developed. The model is verified by comparison with the experimental results obtained from a prototype asymmetrical six-phase induction machine, and its advantages compared to existing models are emphasised.

Inspec keywords: asynchronous machines; magnetic flux; finite element analysis; machine theory; equivalent circuits

Other keywords: asymmetrical six-phase induction machine; mutual coupling; power-sharing operation; vector space decomposition; post-fault operation; asymmetrical conditions; inter-plane coupling effect; unbalanced operating modes; finite element analysis; leakage flux saturation; multiphase machines; orthogonal planes; gamma equivalent circuit approach; saturated VSD model

Subjects: Asynchronous machines; Finite element analysis

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