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It is known that the torque density of multiphase motors can be increased by superimposing high-order spatial harmonics to the fundamental one in the air-gap magnetic field. However, the problem of maximizing the torque capability is still controversial, since the results depend on the constraints that have been considered. The analysis presented in this paper shows how to maximize the magnetic torque...
Nowadays, there is an increasing interest towards multi-phase motor drives, i.e. with a number of phases greater than three, especially for medium and high power applications such as naval and railway propulsion systems.
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