The motor + driving device is specially designed by dodge company for the ultrafine vertical mill. It is a highly reliable mechatronic driving device. It is generally used in the long-distance large ultrafine vertical mill with a length of more than 1000m.Advantages: good soft start performance, linear controllable speed curve when starting, controllable speed curve when stopping, closed-loop control, no-load starting of motor, simple structure, small maintenance workload, when multiple motors drive, it can be started separately and delayed to reduce the impact of belt conveyor on power grid when starting.Disadvantages: high requirements for maintenance workers and lubricants, high equipment prices. It is not suitable for the transportation of ultrafine vertical mill and ultrafine vertical mill with speed regulating function.