Application of Direct Torque Variable Frequency Control Technology in Travelling Crane

Ladle transport was realized by crane,While the traditional control way had power waste,failure rate was higher,Easy to cause "ladle slide" wait for an accident.Crane walking by 4 motors driver,In order to make the crane smoothly walk,4 motor must keep synchronization.According to bridge crane load control characteristics.The DTC inverter control system design,selection and parameter configuration were introduced.Solved the multi-motor load balancing,overcome "bite rail" phenomenon,reduced the equipment failure.