FABRICATION AND EXPERIMENTAL INVESTIGATIONS ON' MICROPROCESSOR BASED SELF CONTROLLED SYNCHRONOUS MOTOR DRIVE

Abstract

This dissertation deals with the experimental studies on a ,microcomputer based Line-Commutated inverter fed synchronous motor drive system. Two three phase fully controlled, thyristor bridges, one for rectifier and another for inverter, microprocessor controlled firing circuits, zero crossing circuits and digital speed measurement circuit have been designed, fabricated and tested. Chapter 1 consists of introduction, literature review and brings out the different methods of starting of Line-commutated Inverter fed synchronous= motor drive. .In Chapter 2, the princile of operation of LCI synchronous motor drive, philosophy of its speed control and system hardware• have been discussed. Chapter 3 describes the system.. software and the various flow charts. Chapter 4 deals with the experimental results.. Conclusions and scope of future work have been given in Chapter•