Design approach to a wound rotor induction motor towards optimization


Pritish Kumar Ghosh,PradipKumarSadhu,Amarnath Sanyal,Debabrata Roy,Biswajit Dutta,



Analytic design,synthetic design,hybrid design, optimal design,sequential searching, development of electrical engineering, Electrical applications,


About 88% of the driving power is produced by 3-phase and single-phase induction motors. In most part it is by squirrel-cage motors, only a small fraction by the slip-ring or phase-wound type. It is because the cage-type motors are relatively inexpensive. But they suffer from low p.f. operation and low starting torque which cannot be manipulated by inserting resistance in the rotor circuit. Also, this type of induction motors is not easily speed-adjustable. Though a little more expensive, the slip-ring type induction motors do not have these disadvantages. Therefore, they are used as speed-adjustable drives and for drives where heavy duty starting is involved. The design of any kind of power equipment should be made cost-optimally in the present day competitive market. A new approach to reaching optimal solution has been shown in this paper by the method of sequential searching with respect to the chosen design variables. Also, another design has been made following a hybrid of analytical and synthetic approach. The design variables have been chosen from designers’ experience. In contrary to the popular belief that there is no need for going in for complexity of optimal design, the quasi-optimal solution may be obtained by the designer from his accumulated experience, we find that the idea is wrong. The optimal design approach saves a lot of money.


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Author(s): Pritish Kumar Ghosh, Pradip Kumar Sadhu, Amarnath Sanyal, DebabrataRoy, Biswajit Dutta View Download