TY JOUR TI Frequency-current system for relay vector control of non-synchronous electric drive in bridge crane travel mechanism KW bridge crane KW nonsynchronous electric drive KW control system KW misalignment KW transverse displacement KW correction block KW contactless sensors KW electromechanical model JO Bulletin of Bryansk state technical university AU Smorudova , T.. AU Kochevinov , D.. AU Fedyaeva , G.. AU Konokhov , D.. PY 2015 IS 2015 PB Bryansk State Technical University