Abstract
This paper in the drive to understand and familiar with the elevator control system of principles, structure and composition of hardware on the basis of the current speed through the double-loop, such as the design, has dragged Reply lift system in a certain range of non-voltage-smoothing Speed And a simple trigger-driven and controlled the entire three-phase bridge rectifier circuit design, completed a simple lift transmission control system solutions. At the same time the design uses the Siemens S7-200 PLC programming process control, transmission control system for the lift the core of the elevator, the design of a simple four-story elevator control system simulation of the PLC, and gives the design of major programmes, Lift the ladder, all levels of state diagram and procedures flowchart. Because of the time in haste and lack of relevant experience, the design there may be some of the deficiencies, but failed to do so in some respects more in-depth study, I will be in the future course of study and work to improve and perfect.
Keywords： elevator, programmable logic controller, current two-speed closed-loop, reply dragged system, teplessregulation
