Abstract
In this paper, a five-phase V-type hybrid-excited permanent magnet (FV-HEPM) machine with unequal teeth is introduced for high torque density and wide flux regulating range, which can be applied in some wide speed-range applications such as electric vehicles (EVs) and hybrid electric vehicles (HEVs). The consequent pole is adopted in the rotor, in which the interior PM is designed as the V-type to improve rigidity and flux density. The stator teeth are divided into the main teeth and the auxiliary teeth to achieve parallel magnetic circuit for the inhibition of demagnetization. DC-excitation windings and armature windings are employed on the stator for better space utilization. Through graphical analysis, the operating principle and topology of this machine are discussed. Afterward, six models with different PM shapes are analyzed and compared by the finite-element (FE) method. A multi-objective optimization method is adopted to optimize the PM size for better electromagnetic performances. The results prove that FV-HEPM machine has not only the excellent torque output capability but also the wide flux regulating ability.
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