ABSTRACT
In industrial applications, machine tools make use of motors for axis feeds and spindle rotation applications. Generally, DC motors are used for this purpose. The speed of these motors is controlled in conventional methods i.e. Ward-Leonard system, multiple voltage control method, rheostatic control method etc. However, these methods are analog in nature and are obsolete now which offer a number of limitations like less reliability, less stability, less maintainability, poor system response etc. These limitations result in more cycle time of production and less productivity. These can be overcome by replacing the conventional methods with microprocessor controlled digital DC Drives. This project gives such an application for DC motor speed control (for axis feed and spindle rotation) on many of the machines at BHEL, Hyderabad. Some of the advantages for using such drives for various purposes are discussed at the end of the project.
