Useful techniques for field analysts in the design and optimization of linear induction motors

Abstract

Induction motor optimization can be time consuming. One of the parameters central to the design is slip, which changes greatly as the field analyst modifies the layout of the machine. Two notable contributions of this paper include (1) a method for computing power factor while modeling only 1/3 of one pole pitch of the machine, and (2) a method for minimizing the number of slip calculations required during design optimization by using equivalent circuit representations of voltage, torque, and rotor power dissipation. The first contribution allows the designer to analyze the smallest subportion of the machine possible during optimization. The second reduces the overhead required by numerous slip calculations. The importance of introducing power factor into the optimization is also discussed. A linear induction motor is the primary focus of this paper.