A comparative analysis for six-phase motor configurations

DFV Garcia, J Taylor, M Mohamadian, D Luedtke… - 2020 - sae.org
DFV Garcia, J Taylor, M Mohamadian, D Luedtke, A Emadi, B Bilgin
2020sae.org
In this paper, a comparison between different six-phase machine topologies is conducted
considering their technical performance for automotive applications. Asymmetrical and
symmetrical configurations, as well as neutral point connection, are considered as candidate
topologies and modelled using vector space decomposition (VSD) and double stator or
double dq transformations. In both cases, a generalized model to include an arbitrary phase
shift between the windings is presented as well as the effect of the neutral connection on the …
Abstract
In this paper, a comparison between different six-phase machine topologies is conducted considering their technical performance for automotive applications. Asymmetrical and symmetrical configurations, as well as neutral point connection, are considered as candidate topologies and modelled using vector space decomposition (VSD) and double stator or double dq transformations. In both cases, a generalized model to include an arbitrary phase shift between the windings is presented as well as the effect of the neutral connection on the inverter model. For the selection, the steady-state and post-fault performance are considered in terms of control flexibility, fault-tolerant capability, and dc-link voltage utilization. For the latest, the different topologies are evaluated operating in both linear and overmodulation regions based on space vector modulation (SVM). Although the flexibility for post-fault operation of asymmetrical configuration with isolated neutral points is lower than the single neutral version, the first one presents the best dc-link utilization with the lowest complexity.
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