The Study On Car Dumper Driver Frequency Control System

Because China’s coal and iron ore transport is mainly depeeds on rail, the transport distance is long, and the number of multi-utility vehicles is large, thus how to avoid the vehicle emptying, improve transport efficiency is the primary consideration of the transportation mangement department; material transport, unloading a heavy workload, these need efficient unloading machinery to accomplish the work,this also becomes the needs of the modern enterprise. Car dumper line could well meet the above requirements, and car dumper line has been heavy production tasks enterprises selected by unloading of bulk cargo (ore, coal, etc.). Car dumper system is based on car dumper for major equipment, together with other additional settings or device, such as positioner, car pusher, vertical wagon holding and level plates on car dumper, wheel gripper and vibration feeding system, composition very high degree of automation of a mechanical unloading production lines.Continue to explore the combination of their own equipment, innovation and effectiveness, practice and improvement, to improve the operating efficiency of equipment, reducing energy loss is in line with a new idea of national "energy conservation" principles and policies.Firstly, based on car dumper unloading-driven composition and operational characteristics, illustrates the importance of car dumper driver frequency control system. Then analyzes the composition of car dumper driver VVVF control system principle and system proposed different control schemes to choose this system for the control program. Car dumper driver frequency control system constitutes a programmable logic controller, the AFE rectifier feedback device, vector inverter, drive motor, speed sensor, PC, and control cabinet. The system uses an AFE rectifier feedback device, the way of the common DC bus drive two vector inverter, and then by two asynchronous motor starting, running and the governor’s control, including these two asynchronous motor master reference synchronization control between theory and inverter Simolink synchronization technology-driven synchronous control of car dumper and car dumper driving frequency control system hardware and software design. Finally, adopts the Rockwell host machine Rsview32and PV1000touch screen as example, introduces car dumper PC control system characteristics as well as the drive frequency control system.Car dumper will step into the "unloading process" after the vertical holding and horizontal holding devices hold two loaded cars.the process changes, load changes due to vehicle type, nonlinearity and variability characteristics of work at the same time requirements for different modes of operation of the flip speed different, and the drive mechanism to take the drive shaft, speed reducer and gear rack structure and other factors, so a higher synchronization requirements on the flip. So taken by the system design for the AFE rectifier feedback devices, the synchronization control between Simolink vector inverter drive motor, incremental tachometer encoder, the absolute value of the flip angle encoder, inverter and other roll-over machine flip process associated with the security design, enable the system to eventually meet the actual conditions of the governor, and synchronization requirements, while reducing the impact and damage to the gearboxes and rack and pinion structure, and extending equipment life.