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In this paper, a totally brushless electric variable transmission (EVT) machine system is proposed for hybrid electric vehicles (HEVs). The key is to cascade a double-stator permanent-magnet brushless (DS-PMBL) machine with an induction motor to form a new EVT machine system. It not only provides the merits of power splitting as other EVT systems, but also offers the unique advantage that the whole...
This paper presents the optimal design of an 18-slot 8-pole double-stator permanent magnet brushless (DS-PMBL) machine. The key is to optimize the split ratio, namely the ratio of the inner-stator outside diameter to the outer-stator outside diameter, to achieve the maximum torque density under the same copper loss. Both the finite element analysis and experimental results are given to verify the...
This paper presents a new three-phase 12/8-pole brushless doubly fed doubly salient (BDFDS) machine for application to electric vehicles. It consists of two types of stator windings-polyphase armature winding and DC field winding. The key is to design, model, and analyze the proposed BDFDS machine. The output power equation is derived analytically, and the initial calculation of machine dimensions...
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