Designing of Double Sided Linear Induction Motor

Electrical Engineering

Linear induction motors are under development for a variety of demanding applications including high speed ground transportation and specific industrial applications including transportation, conveyor systems, actuators, material handling, pumping of liquid metal, and sliding door closers, etc.. These applications require machines that can produce large forces, operate at high speeds, and can be controlled precisely to meet performance requirements. In this project, a double sided linear induction motor prototype has been designed and constructed to identify and study the different concepts and parameters of the motor which are different from other types of electrical machines. The DLIM equations and design procedures are developed and its performance is predicted using equivalent circuit models. The DLIM design choosing various design parameters like the primary voltage, frequency, number of poles, number of phases and many more parameters are considered. Optimum design parameters are obtained by the iterative procedure of the design calculation. The performance curves of the DLIM i.e., thrust and efficiency are drawn and then analyzed for different target thrust values and rated slip. The effect of varying parameters of the DLIM such as air-gap, thickness of aluminum sheet and the number of poles on the performance of DLIM are analyzed and the results are discussed. The linear induction motor is very useful at places requiring linear motion since it produces thrust directly and has a simple structure, easy maintenance, high acceleration/deceleration. The most obvious advantage of linear motor is that it has no gears and requires no mechanical rotary-to-linear converters.

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