Performance investigation of axially and transversally laminated synchronous reluctance motors
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Date
2018-01
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Electric motors considered as workhorse of the modern industries, consume about 70% of the industrial electrical demand. Hence there is an increasing demand for motors which are highly efficient, economical and provides high power output per unit volume. A few newly adopted machines like permanent magnet and reluctance machines have replaced the conventional dc and induction motors in many applications. But the permanent magnets being made up of costly rare earth materials have now given way for more reliable and satisfactory reluctance machines. The rotor design of a Synchronous Reluctance Motor (SynRM) has a significant effect on its efficiency, torque ripple and maximum torque. In order to achieve a good compromise between these three goals, optimized rotor design is necessary. Due to nonlinear characteristics of magnetic materials, finite element method is considered to be a better approach for rotor optimization of the SynRM. The two most crucial design parameters of a SynRM are position and width of flux-barriers for the torque output and torque ripple. This paper proposes an approach to obtain the optimized values of the above mentioned parameters. So in order to achieve design with a low torque ripples and enhanced torque output for a SynRM with full pitch distributed windings in 24 slots on stator. This method is valid for a wide range of SynRMs. It also provides insight into the behaviour of the machine as a function of position and width of flux barriers. Furthermore, the torque and torque ripple of SynRMs having an axially and transversally laminated rotor are compared.
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