Experimental confirmation of thrust and attractive force control for linear induction motor by two different frequency components

Abstract

In this paper, a maglev transportation system with a Linear Induction Motor (LIM) is introduced. It is proposed that two different frequency components are used to achieve the simultaneous and independent control of the thrust and attractive force of LIM. One of the frequency components is synchronous with the motor speed (fm). The other frequency is drive frequency (fd) that generates the thrust and attractive force. This proposed control method simplifies the design of the controller more easily, because the fm frequency component generates only an attractive force. Therefore, the controllers for thrust and attractive force can be separated and independent. This paper verifies the control performance of proposed system by the experimental results.