This paper reports the variant for the advancement of the functional circuit and algorithms to control a bridge crane travels with the correction of misalignment and transverse displacement on basis of the use of new systems of a nonsynchronous electric drive with frequency control. It is offered to use a simple and reliable frequency – current with an autonomous inverter of current and a relayvector algorithm of control. A functional circuit of the system of frequen-cy-current control for the mechanism of a bridge crane travel with the correction of misalignment and transverse displacement. To analyze a crane position there are used differential values obtained by means of the indication difference in contactless sensors measuring a distance from the preset crane points to rails on the opposite supports. The procedure for the computation of control system parameters is stated. For the check of created functional circuits and algorithms of control there is used a complex electromechanical computer model of a bridge crane with a high degree of detailed elaboration (a virtual prototype of a bridge crane). The modeling results of are shown. The shown frequency – current system of control with the correction of misalignment and transverse displacement allows the decrease of threshold differential valuations and the increase of speed and accuracy of regulation