Vertical linear motion system driven by a tubular linear induction motor

This paper presents techniques for system design and control of a vertical linear motion system driven by a tubular linear induction motor (TLIM). A new tubular linear induction motor is designed for propelling the elevator to move up and down. With the motor a control system for the motion system is presented. In order to overcome the parameter variations caused by the TLIM, a robust PID is used. Experimental results have shown that the proposed system together with the control is capable of giving desirable performance.