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Multiphase machines are more and more used in applications where a high power density, a low bus voltage, a wide speed range and possibilities to work in fault mode are required. Due to the high number of available degrees of freedom, multiphase machines are not easy to optimally control in the flux weakening region. This paper shows several strategies for the control of multiphase machines in flux weakening regions and compares them in terms of simplicity to implement and optimality in the use of available quantities. Proposed strategies are applied to a five-phase synchronous machine that has been developed for the MHYGALE project proposed by Valeo company.
electrical and hybrid vehicles, multiphase machines, control in flux weakening regions.
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