基于PLC控制的变频调速在桥式起重机中的应用（Application of variable frequency speed control based on PLC control in bridge crane）.doc

基于PLC控制的变频调速在桥式起重机中的应用（Application of variable frequency speed control based on PLC control in bridge crane） Join the collection to get the latest Application of variable frequency speed control based on PLC control in bridge crane Our [Abstract]: the bridge crane is a typical material handling equipment system, widely used in production activities significantly, thus to improve the operation efficiency of bridge crane, to ensure the safety and reliability of operation, reduce material handling costs is very important. The traditional bridge crane control system mainly adopts relay and contactor to control, and adopts AC winding string resistance method to start and adjust speed. This control system has the disadvantages of poor reliability, complex operation and high failure rate. Electric energy waste, low efficiency and so on. Therefore, the study of bridge crane control system has practical significance, and it is also a research topic of experts and scholars at home and abroad. In view of the above problems in the bridge crane control system, the programmable controller and frequency converter are applied to the bridge crane control system, and have carried on the thorough research. 1. according to the operation characteristic of bridge crane, bridge crane control system adopts industrial touch screen monitoring frequency control system of crane, the system consists of host computer (industrial touch screen system) and slave machine (PLC control system) and frequency conversion system. 2. configuration software as the user can customize the special function software platform, using its good man-machine interface and communication ability in the PC machine can develop the friendly man-machine interface, download to the touch sensitive screen, so that staff can set parameter, the motor start and stop at the same time can realize system fault alarm. 3.PLC system adopts the SIEMENS company products, operation direction and change speed can control the crane cart, c