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This paper explores the feasibility of an intuitive solution for torque density improvement of conventional brushless doubly-fed induction machine by introducing dual-stator structure. A general purpose torque density equation for dual-stator topologies is developed to initialize the key dimensions and, more importantly, evaluate the torque capability of specific designs. The topological requirements...
This paper contains the analysis of a new flux reversal machine (FRM) configuration, designed for low speed (below 150 rpm). The machine consists of two stators, of which the outer one is fitted with a three-phase fractionary winding and the rotor carries alternate polarity permanent magnets placed for heavy flux concentration. The inner stator is slotted, but passive. The results of the finite element...
This present paper will approach the design and analysis of two six-phase electrical machines, a synchronous permanent magnet and a squirrel cage induction motors, for electrical power steering systems. Finite element method will be used in order to analyze, in a comparative manner, the performances of the two electrical machines.
The direct starting of induction motors may cause various problems such as high inrush currents, voltage dips and harmonics. There have been numerous methods proposed to mitigate these stresses that are imposed on the power grid. This paper considers a starting method based on external rotor resistance control scheme that is used with wound-rotor induction machines. The so-called rotor-chopper-controlled...
This paper overviews various electrical machine technologies, including brushless permanent magnet, induction, switched reluctance, and brushless reluctance machines, with particular emphasis on the concept of hybrid electrical machine topologies, and compares their relative merits, in terms of torque and power density, operating speed range, over load capability, and efficiency, for application in...
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