ABSTRACT The paper presents the development of a microcomputer based digital control system for the current source load com mutated inverter fed synchronous motor drive. The control system comprised two loops: (i) Fast acting dynamic speed and torque angle control loop to ensure the self synchronous operation of the drive system , disturbance rejection and robustness of the complete motor drive system, (ii) Slow acting quasi steady-state efficiency maximization loop that ensures that the drive load is met at minimum source power input.