MICROPROCESSOR-BASED SPEED CONTROL OF DC MOTOR FED FROM SEMICONVERTERSUPPLY

The tremendous progress in semiconductor technology has made solid sta te DC motor drives suitable for many practical applications. In this w ork a simple method for gate control of a semiconverter circuit feedin g a separately excited DC motor is presented which is used to vary the motor speed The transient as well as steady-state characteristic perf ormances have been obtained theoretically using closed form solution a nd experimentally using digital techniques. The required firing pulses were generated digitally using a 16-bit microprocessor system. A set- up for the experimental system has been designed and built in the labo ratory. There is excellent agreement between the computed results and those obtained from the actual set-up.