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Soft magnetic composites (SMC) are emerging in electrical machine design offering the potential for innovative machine geometries and lower cost manufacturing. This paper examines the design and analysis of a SMC-based radial-field fractional-slot concentrated-winding permanent magnet machine using 2D finite-element analysis. Its performance is compared with an existing conventionally-laminated, distributed-winding...
Recent work on fractional-slot pitch, concentrated winding (FSCW) surface PM machines has shown that these machines can achieve a wide constant-power speed range. This paper shows that defining the allowable machine design parameter plane using the characteristic current and the peak back-emf provides useful insights into how application requirements restrict the machine parameters. The parameter...
This paper proposes a novel three-phase current reconstruction technique that utilises the measured DC link current and the switching signals of a three-phase inverter used in permanent magnet (PM) AC motors. The method is based on an adaptive current observer, which includes the model of a motor drive to estimate the three-phase currents. The relationship between the three-phase currents and the...
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