In this paper, the joint effect on the thrust and attraction forces of a Linear Induction Motor is discussed and a control algorithm to compensate for those effects is presented. The algorithm is based on the vector control technique and takes into account the variation of the secondary resistance of the LIM when a joint enters the active zone of the LIM. The algorithm was tested by simulation on a sample of linear motor elevator system. Simulations have shown that the fluctuations of the thrust and attraction forces where decreased significantly.