The Linear Motor Control Strategy In The Elevator On Applied Research

Comparing with the traditional elevator, the linear induction motor-driven's elevator has very big superiority, and will substitute for the traditional elevator, and become elevator's mainstream product gradually. Along with control technology and material study development, the equipment which is drived by the linear induction motor is getting more and more. Our country is late at the linear induction motor's research, and in past several years has made many progresses. Therefore, to study linear induction motor is very meaningful.As a result of linear induction motor's structure particularity, its performances are easily influenced by environment, and make its characteristic hard to expression by the precise model, and bring certain difficulty to the control. This article has made the comparison between commonly control methods, and according to the linear induction motor's feature the direct thrust control method is selected. Under the dq coordinate system the linear induction motor's model and the rotating machine model difference has been analyzed, and makes the foundation of direct torque. In order to achieve the good control effect, increases the fuzzy control methods into the traditional PID foundation, and enables the control method to have the strong adaptiveness. The linear induction motor's models, which with and without margin effect, are simulated, and have carried on the comparative analysis to the simulation result.Finally the article has designed the linear induction motor's control system. With the distributional control theory, the entire elevator's control function is divides into several modules, and realizes separately by the different controller, such as ARM, DSP and MCS51.