Abstract
This thesis particularly expatiate the design process of the seven-lays elevator automatic circulation. the contents includes the choice of the electric drag mode, the electric controls mode and the soft- hardware of the design procedure with explains. With the all-around Comparison and demonstration, the main drive system adopt ascendant VVVF (Variable Voltage Variable Frequency) mode, the door adopt DC servo adjust voltage mode, electric control system use PLC (Programmable Logic Controller) control mode, which has the characteristic of convenience and credit function. The hardware part of the system is composed of PLC, transducer, every kind of electricity circuit and safe protections equip. The software part of the system is composed of direction confirmation automatically switch door, acceleration and deceleration, electric security safeguard as well as examine and repair, which provide elevator with practicability, security and reliability. The elevator of the design can satisfy the movement requests.
Keywords: Elevator; PLC; VVVF