Development of USB compatible PC based PD motor controller for chemical process

This paper presents a state-of-the-art development of PC-based PD controller to control the speed of a DC motor used in a process control application. The principal feature of this system is process efficiency can be tuned to maximum possible value by choosing different gain values for different acceleration/deceleration time of motor speed to achieve linear acceleration or deceleration. For different process items, the gain can be tuned, with different process values, through a Personal Computer (PC). The controller is interfaced with the PC through Universal Serial Bus (USB). All these set of values, for each different process, can be stored in the PC to repeat same process multiple times, thus eliminating the need of tuning the system time and again. USB based interfacing of PC with the controller helps in minimizing the data communication time so that a real-time based speed monitoring can be realized in developed Graphical User Interface (GUI).