Control the Simulation of Lift Motion

According to this project, the 89C51 microcontroller is applied to control the simulation of lift motion in order to make it have the capabilities to present upward or downward movements that belong to the input from the outer part. The 89C51 can process these movement by receiving the code signals from the lift drive motor. Furthermore, the microcontroller also controls the system to open-close the lift door and display lift position, once it reaches any floor.

This thesis decribes the design , experiment , development of the speed control of a separately excited DC motor, using a power electronic circuit which controls the power of the motor. The power electronic circuit is the full-controlled rectifier which used a thyristor. In the control of the power electronic circuit , we used the computer (PC) 486 which it ‘ll send and receive any parameter by via Interface Card ,ET-DIO, commanded by Computer. The control program is written by C-language. In result of tests on built system show that the motor worked at average voltage 100 volts on loaded-unloaded condition. The circuit can bared and worked absolutely.