Basic Design equations of Linear Electric Machines

Application of linear electric machine has been increased in recent due to automation of the manufacturing industry, fast transport systems and various defence applications. These machines performance is superior to their rotary counterpart in various specialized applications. So it is necessary to derive the generic equations for designing of linear electric machines. Among different linear electric motors, linear induction motors (LIM) have been widely used due to their simplicity and low construction cost.During design stage of these LIM, it has been observed by the authors that basic design equations of rotary induction motors (RIM) are commonly used. Though the Equations of RIM can be used for design of LIM, but it does not gives a true flavor of LIM. Further, many specialized softwares for designing and analyzing require basic dimensions. These generic design equations of linear induction motor are derived and converted by referring conventional rotary induction motor in this paper. The simple design equation of LIM separates out basic dimensions of like length and width. The end effect and Edge effects are neglected in this study. Derived design equation is used to design double sided linear induction motor (DSLIM), 12 meter in length in this paper. Also 3D Maxwell software is used to analyze this motor at no-load condition.

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