Controlling of a 3-Phased Asynchronous Motor over Profibus Network

Abstract

In this study, Profibus is used in remotecontrolling of an Asynchronous Motor (AM) which is an industrial automation network. Therefore, the asynchronous motor torque and speed control are examined. In controlling the AM, the feedback data and control signals are conducted through a network. In this design, a real time control system has been used and thus, the desired working conditions can be remote-controlled. The used Profibus network provides a high-speed data transfer. This characteristic is important in applications that require sensitive control and the control mistakes stemming from network delay have been minimized. In this study moreover, the designed system has provided a control that is independent from the AM hardware.  been done via with Profibus network. The System consists of Master PLC (Programmable Logic Controllers), 3-phased asynchronous motor, driver and Profibus network that contain the physical structure and protocols that provide the communication among the software. The control of asynchronous motor has been designed as having feedbacks. Profibus network provides high-speed data transfer. This characteristic is important in reducing network delay [15]. In this study, reduction of network delay has to be made precise control.In this study, for the speed and moment control of the AM, the AM is run in the desired speed value by entering the desired speed value or the frequency when the moment is stable by using frequency converter over the Profibus network structure. The speed, voltage and current info of the AM are obtained over the network as real time and assessed, then sent back to the motor over the same network, thus controlling it.