Improvement of a non-contact elevator guiding system by implementation of an additional torsion controller

This paper describes the improvement of an electromagnetic elevator guiding system. Based on an existing system, which is able to control five spatial degrees of freedom of an elevator car, a system enhancement is proposed. The system of five controlled spatial degrees of freedom is augmented by a sixth degree of freedom: This is the elevator car´s vertical torsion angle. Contrary to the former system, it is not longer a precondition, that the elevator car is a rigid body or the manufacturing tolerances in very high buildings are almost zero. Therefore, the system presented is more realistic than its antecessor. The present paper describes the derivation of the additional torsion controller and compares the two unequal systems. Benefits and disadvantages of the augmented system are specified and evaluated.